НАСОС

Изобретение относится к насосам. Насос содержит корпус, выполненный из двух взаимно пересекающихся частей цилиндра 2, 3, причем на противоположных сторонах предусмотрены входное и выходное отверстия 4, 5. В цилиндрах 2, 3 расположены с возможностью вращения вокруг центральной продольной оси роторы 6 и 7. Большие поперечные оси роторов 6, 7 по меньшей мере в одной фазе движения находятся перпендикулярно друг к другу. Роторы 6, 7 выполнены с возможностью перекатываться с обеспечением герметичности друг по другу и относительно внутренней стенки корпуса. Образующие, исходящие из точки пересечения больших поперечных осей каждого ротора в противоположном друг другу направлении, проходят наклонно к соответствующей центральной продольной оси 8, 9. Каждый ротор охватывает две булавообразные части, соединенные своими более узкими концами друг с другом посредством сужения. Роторы 6, 7 имеют такую конфигурацию и расположены относительно друг друга таким образом, что, если большие поперечные оси обоих ...

ШЕСТЕРЕННЫЙ НАСОС С ПОНИЖЕННОЙ ПУЛЬСАЦИЕЙ ДАВЛЕНИЯ

Шестеренный насос с пониженной пульсацией давления, содержащий корпус, крышку, ведущую и ведомую шестерни, корпус имеет камеру, соединенную с нагнетательной полостью, в камере установлен плунжер, поджатый пружиной с возможностью поступательного движения внутри камеры, отличающийся тем, что корпус включает в себя две ведущих и две ведомых шестерни, причем ведущие шестерни спарены между собой и зубья одной из них смещены относительно другой на половину шага между зубьями.

УСТРОЙСТВО ДЛЯ ДЕЛЕНИЯ ПОТОКА ПОРОВНУ МЕЖДУ ДВУМЯ ИЛИ БОЛЕЕ ОБЪЕКТАМИ

Изобретение относится к устройству для деления потока поровну между двумя и более объектами. Устройство для деления потока поровну между двумя или более объектами, образованное, по меньшей мере, двумя элементами для перемещения жидкости, расположенными на валах 10, 11. Канал потока образован полым валом 10, отверстием 16 для пропускания потока, выполненным в его стенке, и углублением 14 для направления жидкости к элементам для перемещения жидкости. Элемент для перемещения жидкости, расположенный на валу 10, посредством вращения регулирует размер отверстия 16 для пропускания потока и, таким образом, количество жидкости, протекающей через отверстие 16. Изобретение направлено на создание устройства, в котором потоки между объектами можно формировать равными с максимально возможной точностью. 7 з.п. ф-лы, 3 ил.

ЭЛЕКТРОГИДРАВЛИЧЕСКАЯ ШЕСТЕРЕННАЯ МАШИНА

Сущность изобретения: шестеренная машина содержит герметичный корпус с впускным и выпускным каналами и пару зубчатых колес, находящихся в герметичном зацеплении, установленные на корпусе электроды, обеспечивающие импульсные электрические разряды на участке начала выхода зубьев из зацепления. Электроды выполнены из электропроводного материала, например, из вольфрамового сплава. 2 ил.

ШЕСТЕРЕНЧАТЫЙ НАСОС

... 1. Шестеренчатый насос с двумя находящимися в зацеплении шестернями (4, 5), которые посредством приводимого в действие приводного вала (7) и опорной цапфы (21) установлены с возможностью вращения в корпусе (1) насоса и между впускным отверстием (2) насоса и выпускным отверстием (3) насоса образуют систему (6) нагнетательных каналов, и с несколькими зазорами, образованными между корпусом (1) насоса, шестернями (4, 5), приводным валом (7) и опорной цапфой (21), при этом один из зазоров образован между приводным валом (7) и одной из шестерен (4), и при этом в этом зазоре расположено соединительное средство (9) для соединения без возможности поворота приводного вала (7) с шестерней (4), отличающийся тем, что зазор между приводным валом (7) и шестерней (4) уплотнен по отношению к торцам шестерни (4) с помощью уплотнительного средства (14.1, 14.2). ! 2. Шестеренчатый насос по п.1, отличающийся тем, что уплотнительные средства образованы по меньшей мере двумя расположенными на расстоянии друг ...

НАСОС

... 1. Насос, содержащий корпус, выполненный из двух взаимно пересекающихся частей цилиндра (2, 3), причем на противоположных сторонах предусмотрены входное и выходное отверстия (4,5) и в каждой части цилиндра (2, 3) расположен вращающийся вокруг ее центральной продольной оси (8, 9) ротор (6, 7), при этом большие поперечные оси роторов по меньшей мере в одной фазе движения находятся почти перпендикулярно друг к другу, а роторы (6, 7) перекатываются плотно друг к другу и относительно внутренней стенки корпуса насоса, причем образующие (12), исходящие из точки пересечения больших поперечных осей каждого ротора (6, 7) в противоположном друг другу направлении проходят наклонно к соответствующей центральной продольной оси (8, 9) и каждый ротор (6, 7) охватывает две почти булавообразные части, которые своими более узкими концами соединены друг с другом посредством сужения, причем роторы (6, 7) имеют такую конфигурацию и расположены относительно друг друга таким образом, что, если большие поперечные ...

РОТОРНЫЙ НАСОС С ОПТИМИЗИРОВАННЫМИ ВПУСКАМИ И ВЫПУСКАМИ

... 1. Роторный насос (10), состоящий из корпуса (12) насоса, который снабжен впуском (14) и выпуском (16), причем корпус насоса (12) имеет облицовку (18), и в корпусе насоса (12) или же в пределах облицовки (18) расположены по меньшей мере два противоположно вращающихся ротора (20), которые во время их вращения образуют насосные камеры (22), причем роторы (20) уплотнены друг по отношению друг к другу, по отношению к корпусу (12) насоса и по отношению к облицовке (18), и причем в корпусе (12) насоса и/или в облицовке (18) в каждой насосной камере (22) расположены по меньшей мере две выемки (24), и причем выемки (24) расположены в пространственной близости к впуску (14) и/или к выпуску (16), отличающийся тем, что корпус (12) насоса и/или облицовка (18) в области впуска (14) и в области выпуска (16) имеет в каждом случае усиления (26) облицовки (18), посредством которых реализовано уменьшение поперечного сечения и, что поперечное сечение впуска (14) и выпуска (16) расширяются в направлении от ...

Шестеренная гидромашина

Изобретение относится к машиностроению, в частности к шестеренным гидромашинам, и может быть использовано в гидравлических системах тракторов, экскаваторов, сельскохозяйственных, дорожно-строительных и других машин, а также для привода в движение их рабочих органов. Цель изобретения - упрощение конструкции, повышение надежности и долговечности. Шестеренная гидромашина содержит корпус 1 с торцовыми крышками 2, в цилиндрических расточках 3 которого размещены шестерни с цапфами 5, установленными в подшипниковых втулках 6 с антифрикционными вкладышами 7, сопряженных с торцами 8 шестерен, и камеру поджима 9, выполненную по меньшей мере на нерабочих торцах одной пары подшипниковых втулок 6 в виде системы пазов, окружающих цапфы 5 шестерен, и установленную в камере поджима 9 эластичную манжету 11 с защитными элементами причем подшипниковые втулки 6 сопряжены между собой по плоским поверхностям. При этом эластичная манжета 11 снабжена эластичными выступами, сопряженными с нерабочими торцами подшипниковых ...

Шестеренная гидромашина

Шестеренная гидромашина

Verfahren und Vorrichtung zum Herstellen von Pfeilgetrieberädern und Pumpen, die dieselben enthalten

ZAHNRADPUMPE

Rotation device for the displacement of flowing media

A device for the displacement of flowing media can be operated as a geared pump or motor and comprises an intermediate plate which is arranged between adjacent pairs of intermeshing drive and intermediate gears inside a housing. The intermediate plate is constructed from a reinforcing section which has an essentially mechanical stability as well as from a bearing section which is fitted on each end of the reinforcing section in order to engage with the adjoining ends of the adjacent drive and intermediate gears. The intermediate plate thereby provides both the required bearing capability and improved mechanical stability.

ZAHNRADMASCHINE (PUMPE ODER MOTOR)

Zahnradpumpe

Zahnradpumpe, umfassend zwei Zahnräder (1, 2), deren Zähne (1a, 2a) unter Beibehaltung eines Nullspiels ineinander eingreifen und deren Zähne (1a, 2a) jeweils definiert sind durch eine Vorderflanke und eine Rückflanke, welche entlang einer Evolventenkurve ausgebildet sind, sowie jeweils einen Zahnkopf (10, 11), der durch den Verlauf der Flanken begrenzt ist, so dass sich in einem Grenzbereich zwischen den Flanken und dem Zahnkopf (10, 11) jeweils eine Kante ausbildet und der Zahnkopf (10, 11) zwischen den beiden an den Zahnkopf (10, 11) angrenzenden Kanten eine konstruktionsbedingte Zahnkopfdicke t0 aufweist, dadurch gekennzeichnet, dass im Grenzbereich zwischen dem Zahnkopf (10, 11) und der Rückflanke eine stetige Schnittfläche (S1, S2) angeordnet ist, so dass der Zahnkopf (10, 11) über eine Kante in die Schnittfläche (S1, S2) übergeht, und die Schnittfläche (S1, S2) die konstruktionsbedingte Zahnkopfdicke t0 derart verkürzt, dass eine Zahnkopfdicke t1 zwischen der Kante im Grenzbereich ...

Verdrängerpumpe mit Überdruckventil

Verdrängerpumpe mit Überdruckventil, a) die ein Gehäuse (3, 4) mit einer Förderkammer (5), eine Niederdruckseite und eine Hochdruckseite und ein in der Förderkammer (5) angeordnetes Förderglied (1, 2) aufweist, durch dessen Fördertätigkeit ein Fluid von der Niederdruckseite durch die Förderkammer (5) zu der Hochdruckseite förderbar ist, b) wobei das Überdruckventil (12) einen Ventilkörper (14), einen Ventilsitz und eine den Ventilkörper (14) gegen den Ventilsitz drückende Federeinrichtung (16) umfasst und in dem Gehäuse (3, 4) angeordnet und mit der Hochdruckseite so verbunden ist, dass der Ventilkörper (14) der Federeinrichtung (16) entgegenwirkend mit einem Fluiddruck der Hochdruckseite beaufschlagbar ist, um Fluid der Hochdruckseite durch das Überdruckventil (12) zu der Niederdruckseite zu leiten, c) und wobei ein in das Gehäuse (3, 4) eingesetzter Ventilsitzeinsatz (15) den Ventilsitz bildet, dadurch gekennzeichnet, dass d) das Gehäuse (3, 4) ein erstes Gehäuseteil (3) mit einer ersten ...

Verstellbare Rotationspumpe mit Verschleissminderung

FLUSHABLE GEAR PUMP

Hydraulische Kippvorrichtung fuer Kraftfahrzeuge

Zahnraederpumpe, bei welcher die Antriebsscheibe zwecks Entlastung der Antriebswelleauf dem Gehaeusekoerper gelagert ist

Zahnradpumpe mit Splinefunktion erzeugtem Zahnradprofil

Drehkolbenpumpe

Drehkolbenpumpe (10) mit mindestens zwei gegensinnig umlaufenden zwei- oder mehrflügeligen Drehkolben (16, 18) deren Antriebswellen (20, 22) Dichtungen (32) aufweisen, wobei die Dichtungen (32) die jeweils auf einem zum jeweiligen Drehkolben (16, 18) gehörenden Wellenansatz (28) angeordnet sind, wobei jede Dichtung (32) mit einer Arretierungseinrichtung (40) versehen ist, die eine Vielzahl von Fixierungspositionen am Gehäuse (38) der Dichtung (32) aufweist dadurch gekennzeichnet, dass die Arretierungseinrichtung (40) ein Ring ist, der mit dem Gehäuse (38) für die Dichtungen (32) in Verbindung steht und der mehrere parallel zur Drehkolbenachse verlaufende Axialnuten (42) aufweist.

Drehkolbenpumpe mit veränderlicher Durchflussmenge, insbesondere für Öl

Drehkolbenpumpe

Drehkolbenpumpe (200, 300) zur Förderung eines Feststoffe (a, b) enthaltenden fluiden Mediums, mit zwei Drehkolben (210, 220) mit ineinandergreifenden Drehkolbenflügeln (222, 322) und mit jeweils einer Drehachse (221, 321) und einem Außenumfang (224, 324), wobei die Drehachsen der beiden Drehkolben beabstandet voneinander und parallel zueinander angeordnet sind und sich die Außenumfänge der beiden Drehkolben teilweise überschneiden, und einem Gehäuse (230, 330) mit einer Einlassöffnung (250, 350) und einer Auslassöffnung (240, 340) sowie einer Innen- (231, 331) und einer Außenwandung (232, 332), wobei die Innenwandung des Gehäuses jeweils einen Abschnitt der Außenumfänge der Drehkolben umschließt und wobei die Drehkolbenpumpe ausgebildet ist, das Medium in einer Förderrichtung von der Einlass- zur Auslassöffnung zu fördern, dadurch gekennzeichnet, dass die Auslassöffnung an der Innenwandung des Gehäuses eine maximale Auswurfausdehnung aufweist, die in einer Richtung, die parallel zur Ebene ...

Zahnradmaschine

AUSSENEINGRIFFSZAHNRADPUMPE ODER -MOTOR

Pumping system for solid particles in fluids has a cyclone filter to feed non particulate fluid to the pump and to feed particles into the fluid duct via a second cyclone filter

A pumping system for solid particles in fluids has the fluid and particle mixture fed into a first cyclone filter (1) via a non return valve (11). The filter output (1B) provides non particulate fluid to a Rootes pump (3) which pumps fluid to a second cyclone filter (2) which is also supplies with a particle mixture from the reservoir (4). The particulate and fluid output from the second filter is fed into the transport ducts (8) along with particulate from the first filter.

Positive displacement gear pump for use in e.g. internal combustion (IC) engine, has pump case formed of material e.g. steel, whose coefficient of thermal expansion is lower than that of material e.g. zinc, for pair of gears

A gear pump (2) has a pair of gears (8,10) meshed together inside a pump case (4). The pump case is formed of a material e.g. steel, ceramic, whose coefficient of thermal expansion is lower than that of the material e.g. zinc alloy, zinc, light alloy, for each gear.

Zahnradförderpumpe

Die Zahnradförderpumpe weist ein Gehäuse (10, 12) auf, in dem eine Pumpkammer (14) gebildet ist, in der ein rotierend angetriebenes Paar von an ihrem Außenumfang miteinander kämmender Zahnräder (16, 18) angeordnet ist, die ein Fördermedium aus einem mit einem Vorratstank verbundenen Ansaugraum (40) entlang zwischen dem Außenumfang der Zahnräder (16, 18) und Umfangswänden der Pumpkammer (14) gebildeten Förderkanälen (44) in einen Druckraum (42) fördern. Es ist ein Ventil (50) zur Steuerung des im Druckraum (42) herrschenden Drucks vorgesehen, das einen Ventilkolben (60) aufweist, durch den ein Verbindungskanal (52) des Druckraums (42) mit dem Ansaugraum (40) gesteuert wird und der durch eine vorgespannte Feder in einer Schließrichtung beaufschlagt ist. Der Ventilkolben (60) begrenzt die Pumpkammer (14) in Richtung der Drehachsen (25, 27) der Zahnräder (16, 18) zumindest teilweise und wird durch die Feder (62) in einer Schließrichtung zu den diesem zugewandten Stirnseiten der Zahnräder (16 ...

Gear pump bearings with hybrid pads

Hydraulic Pump with Reduced Pressure Ripples

Improvements in and relating to hydraulic power transmission

... 646,310. Reciprocating pumps. MILLARS MACHINERY CO., Ltd. April 29, 1948, No. 11715. [Class 102(i)] [Also in Groups II; XXVI and XXIX] Pumps having diaphragms 72a, 72b provided with valve-controlled suction ports 79, 80 and similar discharge ports from the chambers 75, 76, are actuated by liquid under pressure which is supplied alternately to chambers 77, 78. Valves 97, 98 shut off the supply of liquid to the chambers 77, 78 and the back pressure set up in a chamber 90 causes a hydraulic lock which rocks over a casing on the supply pump and reverses the flow of supply liquid. The liquid is directed to chambers 90, 91 alternately. The diaphragm pump may be used for pumping concrete, semisolids or viscous materials and for very high pressures. Perforated stop guards may be provided to limit the movements of the diaphragm. Fig. 21 shows a piston 153 caused to reciprocate in a cylinder 150 by means of a driving disc 156 through the cam action of a projection 154 which engages a circular groove ...

Improvements in pumps of the geared type

... 283,951. Farman, H., and Farman, M., (trading as Farman, H. & M.). Jan. 21, 1927, [Convention date]. Movable-abutment type; discharge and suction passages for pumps.-Geared-wheel pumps comprise a plurality of wheels P, P<1>, P<11> within s single casing A, each wheel forming a pump and having a distinct suction orifice B, B<1>, Fig. 1, or F, G, H, Fig. 3, two wheels at least having a common discharge R. With three wheels, two may have a common discharge L whilst the third has its own discharge K. One pinion P<1> drives the remainder. In case of accidental reverse motion, ball discharge valves X, X<1> are placed at the meshing-points.

Fuel system for a gas turbine engine

The present invention is particularly concerned with the supply of fuel to fuel servos of gas turbine engines. A check valve (62) is positioned in a return pipe (40, 24, 22, 26) from a fuel spill valve (12) to the upstream low pressure side of a high pressure pump (10). An aperture (32) in a piston (30) of the check valve (62) produces a predetermined pressure drop across the check valve (62) when the flow of excess fuel reaches a predetermined value. A fuel servo shut off valve (64) is positioned in a pipe (42, 58) connecting a fuel flow regulator (14) to a fuel servo (80). A piston (46) of the fuel servo shut off valve (64) initially closes a chamber (56) to prevent fuel being supplied to the fuel servo (80), from the fuel flow regulator (14). The piston (46) of the fuel servo shut off valve (64) is moved against a spring (48) when the predetermined pressure drop is formed across the check valve (62) to allow fuel to be supplied from the fuel flow regulator (14) to the fuel servo (80) ...

Improvements in rotary pumps and compressors

... 927,295. Rotary pumps and compressors. SONIC ENGINEERING CORPORATION. Jan. 9, 1961 [Jan. 13, 1960], No. 845/61. Class 110 (2). A rotary pump or compressor comprising a pair of meshing rotary elements mounted for free axial movement on spaced-apart shafts, have between their side faces and the adjacent side faces of the casing in which the elements are housed annular sealing members preventing leakage of fluid across the faces of the elements. As shown in Fig. 2, spur gears 10, 12 mounted respectively on a splined shaft 44 and the smooth end 52 of a shaft 46 are each formed on their side faces inside the root circles, with annular grooves 74 mounting resilient sealing rings 80 of, e.g. polytetrafluorethylene or nylon which stand slightly proud of the grooves before assembly of the gears between end plates 24, 26. The sealing rings may be rectangular or round in cross-section. In a modification, radial grooves 74b, Fig. 6, extend from the annular groove 74 to mount a correspondingly shaped ...

Pump

A gear pump

... 1,008,726. Gear pumps. M. TUROLLA. Oct. 16, 1962 [Nov. 6, 1961; Nov. 23, 1961], No. 39074/62. Heading F1F. A gear pump comprises gears 8, 9 (Fig. 3) having journals 108, 109 carried by pairs of bearing bushes 41 which are prevented from rotating by annular keys 42 lodged between flat faces 141, a pressure-loading chamber 21 communicating with a fluid-discharge duct 5 (Fig 2), through a passage 122, and a sealing ring 44 on a cylindrical carrier-member 43 residing in a bore adjacent chamber 21 to prevent high pressure fluid entering a fluidintake duct 4.

PRESSURE BALANCING IN ROTARY POSITIVE-DISPLACEMENT MACHINES

A rotary positive-displacement fluid-pressure machine of bi-directional type including a casing, intermeshing rotors, and a pressure-balancing arrangement, associated with the end face, remote from said rotors, of the or each end plate means of the machine. Each arrangement comprises sealing means which separate a plurality of areas on said end face, certain being subjectable to high, and others to low, fluid pressures. A further area defined by further sealing means and subjectable only to high fluid pressure is in a zone opposite, and is in positional correspondence with, that zone of the face of the end plate means engaging the rotors which is in registry with the region where the rotors mesh. The further area extends through and beyond the common plane of the rotor axes towards the low pressure side of the machine.

Rotary pumps and motors

... 980,949. Gear pumps and motors. CLARK EQUIPMENT CO. Nov. 1, 1961 [Dec. 23, 1960], No. 39119/61. Heading F1F. A gear pump or motor unit 10 comprises rotatable gear wheels 20, 22, non-deformable sealing washers 60 mounted on the shafts 46, 24 spaced from the gear wheels and movable axially along the shafts into sealing relation with a surface of the housing of roller bearings 48 to inhibit the flow of leakage fluid, under pressure from the gear wheels through side clearances 69, along the shafts through metering passages 96 providing a clearance preferably of between 0À0001 and 0À0006 inch. The metered fluid which serves to lubricate the bearing is then conveyed to an outlet conduit 77, in the case of a motor, by side passages 78, 32 and 52 interconnected by a passage 80 through gear wheel shaft 24 and discharging through passages 82, 84. A transverse passage intersects passage 82 and communicates with a pair of spaced passages through a pair of spring loaded ball check valves to the inlet ...

HYDRAULIC GEAR PUMPS AND MOTORS

... 1448064 Rotary positive-displacement fluidmachines HYDROPERFECT-INTERNATIONAL HPI 17 Jan 1974 [23 Jan 1973] 2245/74 Heading F1F In an hydraulic gear-pump, or motor, pressurebalancing regions 52, 54 on the outer sides of plates 20, 22 abutting the side faces of the gears 12, 14 communicate with chambers 29, 31 for high and low-pressure working-fluid, respectively, and are separated by a gasket 48 lodged in each plate, the plates incorporating bearings 36 for shafts 16, 18. The ends of the gaskets are pressed against the body 26 owing to a tendency to extrusion thereof. Working-fluid circulates through helical grooves 40, annular grooves 42 and conduits 44 to lubricate the bearings, recesses 38 serving as reservoirs. Channels 56 may inter-connect the bearings and the low-pressure chamber 31.

HYDRAULIC GEAR MOTORS

... 1462967 Rotary positive displacement devices ROBERT BOSCH GmbH 30 Sept 1974 [1 Oct 1973] 42434/74 Heading F1F The zones of pressure acting on end-plates 18, 19 of an externally meshing gear hydraulic motor includes one 37, 37' Fig. 2 at each end which may be selectively connected to a high or low-pressure source so that the axial sealing pressure urging bearing members 9, 10, 16, 17 against the endfaces of meshing gears 6 and 13 may be reduced at start up. The zones 37, 37' are located respectively between end-plates 18, 19 and end-caps 2, 3 and are connected, by a hydraulically, mechanically or electrically actuated valve 36, during motor start up to a fluid reservoir 51 via lines 38, 39, 40, 41, 52 and to high-pressure existing in the intertooth spaces when running via bores 34, 35, 41, 40, 38, 39. To start the motor the valve is moved to position II to connect lines 41 and 52 to reservoir 51 whereafter the valve is returned to normal position 1 by spring 36' to connect line 41 to 35 ...

Improvements in spinning pump arrangements for machines for manufacturing artificial textile thread

... 289,497. Kindermann, H. Nov. 23, 1926. Apparatus for making filaments.-In order that the spinning pump a may be held in engagement with its driving-gear k when the spinning tube b is turned to its spinning position, the latter is provided with an extension arm l adapted to engage the pump body, the parts being so arranged that such engagement tends to hold the gears in mesh; when the spinning tube is raised, the arm l engages a stop m on the pump body, so carrying the pump gears out of engagement. The bracket c carrying the parts is formed with a central arm d, in which is secured by means of a set screw f, the connecting tube e constituting one of the pivots of the pump and spinning tube; the other pivot for the spinning arm consist of a pivot screw g, so that the spinning arm can be dismantled without disturbing the pump.

Improvements in or relating to apparatus for use in the manufacture of artificial filaments, films or the like

... 314,099. British Celanese, Ltd., and Kinsella, E. Dec. 17, 1927. Fluid-actuated valves.-A device for use in the manufacture of artificial silk, films, &c. for delivering a constant flow of liquid under pressure, comprises a. static measuring-device of the orifice, capillary tube, construction or other type, the communication from the source of liquid under pressure to the static measuring-device being through a valve the motor-member of which is exposed on opposite sides to the pressures on the inlet and delivery sides of the static measuring-device, the arrangement being such that a constant difference as between the pressures is maintained. The static measuring-device may also be provided with means such that the desired constancy is preserved notwithstanding variations in the temperature of the liquid. In the form shown in Fig. 1, the static measuring- device consists of an orifice 18 in a plate 17, and the pressure-balance valve comprises a piston valve member 6 mounted on a piston ...

Improvements in or relating to spinning pumps

... 331,152. Barmer Maschinenfabrik Akt.-Ges., and Sieper, F. Oct. 3, 1929. Governing and regulating pumps; movable-abutment type.-A rotary measuring pump for artificial silk spinning has the pressures in its inlet and outlet chambers maintained at the same level by means of an automatic throttling device. A diaphragm 5 separates two annular areas 7 and 6 which are connected to the supply chamber of the pump, 17 and 18, and the discharge chamber respectively. An excess of pressure on the supply side causes the diaphragm to deflect and throttle the discharged material which passes through a duct 16. The annular space 7 is inclined at an angle to the face of the plate 2 to prevent the material from shortcircuiting from the inlet duct to the exit duct, both of which are situated in the narrow position of the space 7. Specifications 182,154 and 293,325 are referred to.

HYDRAULIC SEALS

Improvements in hydraulic gear pumps and motors

... 1,125,574. Hydraulic gear pumps and motors. SOC. INDUSTRIELLE GENERALE DE MECANIQUE APPLIQUEE. Jan.31, 1966 [Feb. 16, 1965], No.4218/66. Heading F1F. A hydraulic gear pump or motor comprising intermeshing gears 4, 5, Fig. 1, carried, at least on one side, both are shown, by rigid bearings movable in an axial direction which are subjected to thrust to urge them towards the gears includes abutment means limiting the movement of the bearings such that there is minimum play or clearance between the side faces of the gears and the adjacent side faces of the bearings. As shown, the pump body 1 closed at its ends by plates 2, 2a is provided in the region of the working chamber, with an inwardly directed abutment forming shoulders 26, 26a against which the rigid bearings 15, 16, 15a, 16a are urged by hydraulic pressure, discharge pressure in the case of a pump, supply pressure in the case of a motor, admitted to cylinders 19, 20, 19a, 20a sealed by rings 21, 22, 23, 21a, 22a, 23a. The body 1 on ...

Improvements in and relating to gear pumps

... 1,147,062. Gear pumps. ARMSTRONG PATENTS CO. Ltd. May 3, 1966 [May 8, 1965], No. 19521/65. Heading F1F. A gear pump comprising on each side of the pump gears 18, 28, Fig. 3, a pair of bearing bushes 22, 32 and 24, 34 of D-shape external configuration rotatably supporting the driven and idler shafts 20, 30 with the plane faces of the D contiguous, includes between the outer end faces of the bushes and the adjacent inner faces of the housing covers 78, 44 a seal 70 to prevent the leakage of hydraulic fluid that occurs between the contiguous surfaces and around the bushes. The seal 70, Fig. 5, is of figure-of-eight configuration with further portions 72 bridging the break between the bushes. The bushes and the shafts are lubricated by the leakage of some of the pumped fluid at discharge pressure outwardly from the gears along the shafts 20, 30. A passage 84 in the cover 78, bore 88 in the shaft 30 and passages 59, 92, 94 permit a controlled flow of the lubricant to the inlet side of the pump ...

Improvements in gear pumps and motors

... 1,003,844. Gear pumps and motors. W. YOUNG. July 5, 1963 [April 7, 1962], Nos. 3203/62 and 13491/62. Heading F1F. In a gear pump, or motor, a pair of flexible cheek plates E1, E2 (Fig. 2) abut shoulders a (Fig. 1) at the peripheries of bores M1, M2 in which they are lodged and are pressed against side faces g1, g2 of a pair of meshing gears B1, B2 by pressure communicated to a space e through axial passageways a2 on the highpressure side of the gears, said shoulders positioning the plates such that they are separated from the gears by a space a1 when the pump or motor is stationary. To increase their flexibility the plates include arcuate grooves P on the sides adjacent space e and in register with the gear teeth. Fluid leaking through bearings c1, c2 collects in chambers G1, G2 and escapes through a passage H2, or H3, to the low-pressure side of the gears ...

Improvements in vacuum pumps

Balanced gear pump also capable of operating as a motor

... 496,373. Gear pumps and engines. VROLIX, A. S. T., and SOC. ANON. L'OUTILLAGE R. B. V. May 21, 1938, No. 15239. Convention date, May 22, 1937. [Class 110 (ii)] Means for balancing suction and delivery pressures (in the case of a pump) compiise chambers 9, 14, of unequal lengths around each gear which communicate respectively with the delivery 5 and suction 4. The angle # of the chamber 9 is equal to. the opposite angle alpha which includes the meshing arc of the gears. The chambers and passages 8, 13, may be arranged in the pump side cheeks. In a modification, Fig. 3, a reversible pump or engine has balancing chambers 9, 14, of equal length, and a separate chamber 20 to balance the pressure in the meshing arc. The chambers 9, 14, communicate with the pressure side of the pump, this pressure opening one or other of the valves 11, 16. These chambers and passages may be located in the side cheeks. Further passages may be provided to lead off liquid to the gearshaft bearings, for lubricating ...

SIDE FACE SEALING IN A HYDRAULIC GEAR PUMP

... 1485904 Positive-displacement rotary machines PLESSEY CO Ltd 30 Jan 1976 [13 Feb 1975] 6101/75 Heading F1F A side face seal 20 for sealing the ends of the intermeshing gears of a gear-pump has its surface which seals against the gears provided with open channels 29, 30 which connect gear shaft receiving apertures 22, 24 to the inlet side of the pump, open channels 32, 34 extending towards each other from the outlet and inlet sides, respectively, and an elongate area 26 inclined to the axis of the channels 32, 34 for contacting the gears in their intermeshing zone to prevent leakage from the outlet to the inlet side. The provision of the channels 32, 34, which are deeper than the channels 28, 30 is stated to relieve the pressure in the intermeshing zone and thereby reduce pump noise. Channels 28, 30 allow pumped fluid to flow between the inlet and the apertures 22, 24 for lubricating the shafts of the gears. The sealing surface may be formed on the surface of a casing for the gears or on ...

GEAR PUMP OR MOTOR

... 1492327 Externally meshing gear pumps and motors ROBERT BOSCH GmbH 10 Sept 1975 [12 Sept 1974] 37247/75 Heading F1F Excessive high pressures on the peripheral surfaces of the bearing bushes of an externally meshing gear pump or motor are prevented by creating a low pressure zone 51 between the peripheral surface of the bush and the associated housing bore. The peripheral surface of each bush, e.g. 16, is given a rectangular groove 47, 48, 49, 50 in which is located a seal 52 which encloses zone 51. This zone extends from adjacent the high pressure side of the machine for about 120 degrees and is connected to an annular low pressure space 21 adjacent the outer end of the bearing bush 16 by a groove 55 in the bush 16. Space 21 is connected by recesses 64 to the low pressure side of the pump.

PUMP ARRANGEMENT FOR ENGINE BEFORE LUBRICATION

GEAR PUMP WITH DELIVERY REGULATION

PUMP ARRANGEMENT

STEAM PLANT

IMPROVED FLUID COUNTER MECHANISM

ROTATIONSKOLBENPUMPE, INSBESONDERE ZAHNRADPUMPE

GEAR WHEEL MACHINE

AGAINST POLLUTANTS RESISTANT GEAR PUMPS AND ENGINES.

ROTARY PISTON PUMP, IN PARTICULAR GEAR PUMP

Gear wheel pin pump

REMOVABLE HOUSING HEADS FOR HYDRAULIC PUMPS AND ENGINES

GEAR PUMP

DEVICE FOR THE AXIAL PROMOTION OF LIQUIDS

GEAR PUMP FOR VERY VISCOUS LIQUIDS

ROTATING POSITIVE-DISPLACEMENT ENGINE WITH AT LEAST TWO OUTER SPLINE PROMOTION GEAR WHEELS AND HOUSINGS FOR SUCH A MACHINE

FEED PUMP

GEAR PUMP

Gear pump

PRESSURE PLATE FOR ROTARY PUMP

GEAR-PUMP FOR MIXING GAS WITH LIQUID

Fluid pump for a linear actuator

A fluid pump for a linear actuator, the linear actuator comprising a rod that extends or retracts by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump is of the rotary type and reversible and includes a valve structure comprising a first and second check valve (98,100) and a first and second shuttle (92,102) that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.

Fluid pump for a linear actuator

A fluid pump for a linear actuator, the linear actuator comprising a rod that extends or retracts by controlling the flow of fluid to and from portions of a fluid chamber on either side of a piston disposed within the fluid chamber and supporting the rod. The pump is of the rotary type and reversible and includes a valve structure comprising a first and second check valve (98,100) and a first and second shuttle (92,102) that enables the pump to redistribute fluid obtained from one portion of the fluid chamber on one side of the piston to the other portion of the fluid chamber on the other side of the piston without first returning the fluid to a fluid reservoir thereby increasing the efficiency of the pump.

Dosing device adapted for dispensing a concentrate from a holder in a metered manner

GEAR-PUMP FOR MIXING GAS WITH LIQUID

GEAR PUMP

A gear pump for the dosed conveyance of pigmented lacquers or paints and which is adapted for use with a painting robot. The gear pump comprises two toothed wheels meshing with one another and which are mounted within a pump housing in such a manner that they can be rotated by a driven drive shaft and a fixed bearing shaft. For this, the drive shaft is mounted by a bearing section at multiple points in a pump housing and a coupling section of the drive shaft projects out of the pump drive to connect to a drive. In order, on the one hand, to avoid wear due to high pressure forces and, on the other hand, to absorb a pronounced load from the outside, a supporting bearing for the radial and axial support of the drive shaft is formed on the drive shaft's coupling section projecting outside of the pump housing.

ROTARY PUMPS AND MOTOR

LOW PRESSURE LUBRICATION SYSTEM FOR FLUID DEVICE

There is shown a pressure loaded external gear pump with a low pressure lubrication system. The low pressure lubrication system utilizes the viscous shear pumping effect which occurs between the shafts and bearings to draw fluid from the inlet port, circulate it past the bearings and then return it to the inlet port.

HYDRAULIC GEAR PUMP OR MOTOR WITH FLOATING WEAR PLATES, BALANCE ASSEMBLY, AND UNITARY LOAD BEARING AND ALIGNMENT MEANS

HZ-189 HYDRAULIC GEAR PUMP OR MOTOR A fluid gear pump or motor has a central housing with an end cover on one side and an adapter cover on the other. A pair of gears are rotatable inside the housing and one gear shaft extends through the adapter cover for attachment to another machine. The adapter cover is mechanically grounded to the attached machine. Internal loads on the gear shafts are transmitted to the bearings on either end of the shafts in the two covers. One centering plate transmits the loads from one pair of bearings in the end cover to the housing. Another centering plate transmits the loads from the housing and the other bearings to the grounded adapter cover.

ROTARY PUMPS AND MOTOR

A rotary impeller pump or motor is provided having a case, a pair of rotary impellers in said case, a plate having a first face divided by lands into a plurality of chambers against corresponding ends of the impellers and a second face having two counterbores around the rotary impellers, annular seal means intermediate the ends of each counterbore forming a pair of chambers within the counterbore, opposed inlet and outlet ports in said case whereby said plate is balanced in pressure on opposite sides by fluid in said chambers on the first face and the counterbore.

GEAR PUMP

GEAR PUMP

A gear pump for the dosed conveyance of pigmented lacquers or paints and which is adapted for use with a painting robot. The gear pump comprises two toothed wheels meshing with one another and which are mounted within a pump housing in such a manner that they can be rotated by a driven drive shaft and a fixed bearing shaft. For this, the drive shaft is mounted by a bearing section at multiple points in a pump housing and a coupling section of the drive shaft projects out of the pump drive to connect to a drive. In order, on the one hand, to avoid wear due to high pressure forces and, on the other hand, to absorb a pronounced load from the outside, a supporting bearing for the radial and axial support of the drive shaft is formed on the drive shaft's coupling section projecting outside of the pump housing.

LIQUID SEAL PUMP OF THE HELICAL SCREW TYPE

Liquid seal pump of the helical screw type including a pump housing (3) with an inlet (2), outlet (6) and within the housing provided helical screw rotor (7) driven by means of a motor (8). The outlet (6) of the pump (3) is provided with a sealing liquid tank (4) for the supply of liquid to the pump and thereby maintaining the liquid seal under idle running of the pump.

EXTERNAL GEAR PUMP INTEGRATED WITH TWO INDEPENDENTLY DRIVEN PRIME MOVERS

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate.

MOTOR-DRIVEN HYDRAULIC PUMP AND DRIVING COUPLER USED IN THE SAME

A motor-driven hydraulic pump for use in motor vehicles and a driving coupler used therein, in which the pump includes a driving gear and a follower gear, an intake chamber and an outlet chamber formed on opposite sides of the meshed gears, a housing for enclosing the intake chamber and the outlet chamber, the housing being supported by a first support on one side and a second support on the other side, and a noise damper including a space inside for reducing noise occurring the delivery of a working oil, the noise damper communicating with the outlet chamber and being fixed to the second support of the housing, and wherein the driving coupler includes a protruding, undulated sleeve including a mortise mating with a tenon formed on the end of either the driving shaft or the driven shaft, and a sleeve counterpart including a mortise mating with a tenon formed on the end of the other shaft, and a protruding, splined projection which includes splines shaped to fit into the undulated sleeve ...

METERING CAP WITH INTEGRAL PUMP-MOTOR HAND OPERATED MIXING FACILITY

A first component of a flowable material is squeezed out of a cartridge (C) which can be emptied by means of a press (P). The main component flows through the feed line (8) to the outlet line (11) and in the process drives two rotors (31) seated in the metering chamber (9) in the housing (1). Gear wheels (34) are seated on the shafts (30) of the rotors (31), which mesh with each other and in this way form a gear pump (24). The gear pump (24) conveys an admixing component from an integrated container (18) via a feed line into the outlet line (11). At least two components can be admixed in a metered manner in an extremely exact ratio to each other by means of the metering cap of the invention .

Dosing Cap

Pompe à engrenages.

Doppel- oder Mehrfachzahnradpumpe.

Pompe volumétrique à débit réglable indépendamment de la vitesse de rotation.

Zweistufige Zahnradspinnpumpe.

Pompe à engrenage.

Machine présentant au moins une partie rotative tournant dans une enveloppe.

Pompe à engrenages.

Pumpeneinrichtung.

Zahnradpumpe

Hydraulische Hochdruck-Rotationsmaschine.

Pump assemblies with freeze-preventive heating

Pumps are disclosed that include a pump housing and at least one movable pumping element situated in the housing. The pumping element(s) are magnetically driven by magnetically coupling an external magnet driver (e.g., a stator) to a driven magnet located in the housing. A control circuit selectively operates the stator and a heat-producing element, so as to energize the heat-producing element especially in a potential freezing condition when the pump is not being otherwise operated. Thus, the fluid in the pump is prevented from freezing, and freeze-related pump damage is avoided. The heat-producing element can be the stator itself energized differently from when the stator is used for driving the pump.

External Gear Pump for Hot Cooking Oil

An overhung external spur gear positive displacement pump for hot oil or deep fryer applications is disclosed. The external gear pump includes a casing that includes a through bore for accommodating a drive shaft that leads to a pump chamber that accommodates a drive gear and a driven gear. The casing further includes a recess connected to the pump chamber for accommodating a stationary pin. The casing also includes a proximal end coupled to a prime mover and a distal end coupled to a head. The gears are enclosed in the pump chamber by the head. The stationary pin is accommodated within the driven gear and the drive shaft is coupled to the drive gear. The head is provided in the form of a flat plate with a plurality of holes for accommodating fasteners that couple the head to the distal end of the casing.

Hydraulic transport device and electrohydraulic control module

A hydraulic transport device for transporting a hydraulic medium. The device includes at least one externally toothed gear pump that is driven by an electric motor, and a control device attached to the pump. A passive rotational speed detection element is arranged in the pump and interacts with an active rotational speed detection element that is arranged in the control device to detect the rotational speed of the pump shaft.

Pump System

One embodiment of the pump system includes a cover housing and a main body affixed to one another for operation. A drive and idler gear may be mounted within a gear chamber in the main body for rotation there about, and inlet fluid may be provided on both the axial and radial surfaces of the drive and idler gear. The cover housing may be outfitted with one pressure relief channel or with two pressure relief channels of different geometric sizes and with different actuation pressures. The drive and/or idler gear may have dimples fashioned on an axial surface thereof, and lubricant troughs may be fashioned at various locations in the main body and/or the cover housing to reduce wear within the pump. 1. A pump comprising a rotating and a stationary component having at least one interface there between , wherein said at least one interface is configured with a plurality of dimples.2. The pump according to wherein said rotating component is further defined as a rotary gear set comprising:a. a rotor gear, wherein said rotor gear is formed with a plurality of dimples on an axial surface of said rotor gear; andb. a stator ring gear, wherein said stator ring gear is formed with a plurality of dimples on an axial surface of said stator ring gear.3. The pump according to wherein said stationary component is further defined as comprising a main body surrounding the periphery of said stator gear and a cover housing that may be cooperatively engaged with said main body.4. The pump according to wherein said stator ring gear further comprises a plurality of stator radial bores therein.5. The pump according to wherein said pump further comprises a plurality of rotor grooves fashioned on an axial surface of said rotor gear and a plurality of stator grooves fashioned on an axial surface of said stator ring gear.6. The pump according to wherein said plurality of rotor grooves is further defined as four rotor grooves oriented at zero claim 5 , ninety claim 5 , one hundred-eighty claim 5 ...

VOLUME RATIO CONTROL SYSTEM AND METHOD

A system and method for controlling the volume ratio of a compressor is provided. The system can use a port () or ports in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A control valve () can be used to open or close the port or ports to obtain different volume ratios in the compressor. The control valve () can be moved or adjusted by one or more valves that control a flow of fluid to the valve. A control algorithm can be used to control the one or more valves to move the control valve to obtain different volume ratios from the compressor. The control algorithm can control the one or more valves in response to operating parameters associated with the compressor. 1. (canceled)2. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage;a port positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;a valve positioned near the port to control vapor flow through the port;the valve having a first position to permit a first vapor flow from the compression mechanism to the discharge passage, a second position to permit a second vapor flow from the compression mechanism to the discharge passage and a third position to prevent vapor flow from the compression mechanism to the discharge passage;the compressor having a first volume ratio in response to the valve being in the first position, a second volume ratio in response to the valve being in the second position and a third volume ratio in response to the valve being in the third position, the first volume ratio being less than the second volume ratio and the the second volume ratio being less than the third volume ratio;at least one solenoid valve, the at least one solenoid valve being positioned to control a flow of fluid to the ...

Heating/cooling system for indwelling heat exchange catheter

A cooling system for an indwelling heat exchange catheter includes a heat exchange bath that is configured to receive a conduit that carries saline to and from the catheter. A heating/cooling fluid is in the bath and exchanges heat with the saline. The heating/cooling fluid flows through a heat exchanger that includes a refrigerant and two variable speed DC compressor for removing heat from the refrigerant. A gear pump circulates the working fluid to and from the catheter and is removably engaged with a pump support platform.

High-Performance Oil Pump

A high-performance oil pump for pumping oil in an internal combustion engine that eliminates or greatly reduces cavitation in the oil pump, thereby increasing the efficiency and performance of the oil pump. The present invention provides a housing having an inlet for receiving a supply of oil and an outlet for discharging the oil. At least two gears rotatably and matingly are disposed within the housing for pumping the oil from the inlet to the outlet. A pressure regulation circuit is disposed within the housing for balancing oil flow pressure between the inlet and the outlet by redirecting a portion of the oil from the outlet to the inlet when said oil flow pressure reaches a predetermined level at the outlet in order to reduce or eliminate cavitation of oil in the oil pump. 1. A high-performance oil pump for pumping oil in a variable speed internal combustion engine , comprising:an enclosed housing having a first side and a second side, wherein said first side has a single inlet for receiving oil from an oil reservoir and said second side has a single outlet for discharging oil to said internal combustion engine, wherein said inlet has a longitudinal axis;a pair of gears rotatably and matingly disposed within a pumping chamber of said housing for pumping oil from said inlet to said outlet, wherein said pumping chamber has a longitudinal axis;an inlet passageway extending from said inlet to an inlet side of said pumping chamber, wherein said inlet passageway has a longitudinal axis substantially parallel to said longitudinal axis of said pumping chamber and said longitudinal axis of said inlet, wherein said inlet is consistently larger than said inlet passageway from said oil reservoir to said inlet passageway;an outlet passageway extending from an outlet side of said pumping chamber to said outlet, wherein said outlet is larger than said outlet passageway; anda pressure regulating circuit disposed within a bore in said housing redirects a portion of oil from said ...

Adaptive self-sealing microfluidic gear pump

A microfluidic pumping system configured to prevent backflow from an outlet of the system toward an inlet of the system. The microfluidic pumping system comprising a gear housing that has an inlet and an outlet and that houses a drive gear, an idler gear and a drive shaft. The system further includes a front end plate that is coupled to a first surface of the gear housing and a rear end plate that is coupled to a second, different surface of the gear housing. Also coupled to the gear housing is a first and second Halbach magnet arrays that is disposed between the front end plate and the rear end plate. The first and second Halbach magnet arrays include one or more solenoids and the first Halbach magnet array is disposed proximate to the drive gear and the second Halbach magnet array is disposed proximate to the idler gear.

System to Pump Fluid and Control Thereof

A fluid system includes a variable-speed and/or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and/or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump. 130.-. (canceled)31. A hydraulic system comprising: at least one electric motor,', 'a gear assembly configured to be driven by the at least one electric motor such that fluid is transferred from an inlet port of the hydraulic pump to an outlet port of the hydraulic pump; and', 'a control valve disposed on a side of the inlet port or the outlet port, wherein the first control valve is configured to be throttled; and, 'a hydraulic pump to provide hydraulic fluid to a hydraulic actuator having first and second ports, the hydraulic pump including,'}a controller configured to operate the at least one electric motor to control a flow in the hydraulic system to a flow set point or a pressure in the hydraulic system to a pressure set point, the controller further configured to operate the control valve to control the flow in the hydraulic system to the flow set point or the pressure in the hydraulic system to the pressure set point.32. The hydraulic system of claim 31 , wherein the hydraulic system is a closed-loop system.33. The hydraulic system of claim 31 , wherein the control valve is throttleable between 0% and 100%.34. The hydraulic system of claim 31 , wherein the control valve is a ball valve.35. The ...

Gear pump and image recording apparatus

To reduce frictional heat generated between a rotation shaft and a bearing portion in a gear pump in which the rotation shaft having a gear mounted thereon is received by the bearing portion and an image recording apparatus having the gear pump. Provided is a gear pump which has a rotation shaft, a bearing portion which receives the rotation shaft, and a gear which is mounted on the rotation shaft and rotates with the rotation shaft, in such a manner that the gear feeds liquid. Furthermore, at least either a concave portion or a convex portion is provided in at least either the rotation shaft or the bearing portion.

Geared positive-displacement pump with self-compensating gear chamber

A positive-displacement pump ( 10 ) of the type comprising a driving gear ( 12 ) and a driven gear ( 14 ) perfectly coupled together and each mounted on a respective support shaft ( 16, 18 ). The driving gear ( 12 ) is operatively connected to a motor ( 20 ) to set the driven gear ( 14 ) in rotation and generate the pumping action on a fluid. The gears ( 12, 14 ) are contained in a chamber ( 40 ) provided with a closing plate ( 42 ). The support shafts ( 16, 18 ), the central body ( 38 ) of the pump ( 10 ), the chamber ( 40 ) that contains the gears ( 12, 14 ), the closing plate ( 42 ) of such a chamber ( 40 ), an inner magnet ( 36 ) and the base of the rear body ( 28 ) of the pump ( 10 ) are in turn housed inside a casing ( 30 ) of the pump ( 10 ).

ADHESIVE DISPENSING SYSTEM WITH CONVERTIBLE NOZZLE ASSEMBLIES

An adhesive dispensing system for applying liquid adhesive to a substrate using different nozzles with the same manifold is disclosed. The adhesive dispensing system includes a manifold having a body, a first clamp configured to engage the body of the manifold, a second clamp configured to engage the body of the manifold, and a nozzle. The first and second clamps secure the nozzle to the body of the manifold. The body of the manifold has a first contact surface that engages the first clamp and a second contact surface that engages the second clamp and the nozzle, where the second contact surface is angularly offset from the first contact surface. 1. A manifold for a liquid adhesive dispensing system , the manifold comprising:a body having a first contact surface that engages a first clamp and a second contact surface that engages a second clamp and a nozzle, wherein said first and second clamps secure said nozzle to said body of said manifold, and said second contact surface is angularly offset from said first contact surface.2. The manifold of claim 1 , wherein said body has a top surface claim 1 , a bottom surface opposite said top surface along a vertical direction claim 1 , a front surface claim 1 , and a back surface opposite said front surface along a longitudinal direction that is perpendicular to the vertical direction claim 1 , wherein said second contact surface is spaced from said bottom surface along the vertical direction.3. The manifold of claim 2 , wherein the body has a third contact surface that extends from said second contact surface to said bottom surface claim 2 , said third contact surface being angularly offset from said second contact surface.4. The manifold of claim 2 , wherein said front surface includes said first contact surface.5. The manifold of claim 1 , wherein said first contact surface defines at least one bore that is configured to receive at least one fastener claim 1 , wherein said at least one fastener secures said first clamp ...

PUMP WITH BLEED MECHANISM FOR REDUCING CAVITATION

A gear pump assembly includes a drive gear having a plurality of circumferentially spaced teeth, and a driven gear likewise having a plurality of circumferentially spaced teeth positioned for intermeshing engagement between the drive and driven gears via the teeth. A bleed mechanism directs carryover fluid from a discharge side of a bearing dam to an inlet side of the bearing dam in order to supply the carryover fluid to a carryover volume disposed between mating drive gear teeth and driven gear teeth. The bleed mechanism including a passage communicating with at least one of (i) a gear face of the drive gear, (ii) a gear face of the driven gear; or (iii) a bottom of a gear tooth profile adjacent a root region between adjacent gear teeth. 1. A gear pump assembly comprising:a drive gear having a plurality of circumferentially spaced teeth;a driven gear having a plurality of circumferentially spaced teeth that mesh with the teeth of the drive gear whereby rotation of the drive gear results in rotation of the driven gear; anda bleed mechanism that directs carryover fluid from a first side of a bearing dam to a second side of the bearing dam in order to supply the carryover fluid to a carryover volume disposed between mating drive gear teeth and driven gear teeth, the bleed mechanism including a passage communicating with at least one of:(i) a gear face of the drive gear,(ii) a gear face of the driven gear; or(iii) a bottom of a gear tooth profile adjacent a root region between adjacent gear teeth.2. The gear pump assembly of wherein the passage includes at least one of a first passage portion extending through a tooth of the drive gear and/or driven gear.3. The gear pump assembly of wherein the first passage portion extends in a direction substantially parallel to opposite faces of the tooth of the drive and/or driven gear.4. The gear pump assembly of wherein the passage includes a second passage portion communicating at a first end with the first passage portion ...

CAVITATION RESISTANT GEAR DRIVEN FUEL PUMP

A gear pump for a gas turbine engine including a first gear having a plurality of gear teeth supported for rotation on a gear shaft relative to a second gear, wherein the gear teeth are formed from a steel base material and surfaces of the gear teeth are coated with a cavitation resistant coating material, and a journal bearing for carrying a gear shaft load through a fluid film pressure between a surface of the gear shaft and a surface of the journal bearing, wherein at least a portion of the journal bearing is formed from a cavitation resistant base material. 1. A gear pump , comprising:a) a first gear having a plurality of gear teeth supported for rotation on a gear shaft relative to a second gear, wherein the gear teeth are formed from a steel base material and surfaces of the gear teeth are coated with a cavitation resistant coating material; andb) a journal bearing for carrying a gear shaft load by way of a fluid film between a first surface of the gear shaft and a second surface of the journal bearing, wherein at least a portion of the journal bearing is formed from a cavitation resistant base material.2. A gear pump as recited in claim 1 , wherein the cavitation resistant base material from which at least portion of the journal bearing is formed is an aluminum (Al) bronze material.3. A gear pump as recited in claim 1 , wherein the cavitation resistant base material from which at least a portion of the journal bearing is formed is a nickel aluminum (NiAl) bronze material.4. A gear pump as recited in claim 1 , wherein the gear teeth are coated with a vapor-deposited cavitation resistant coating selected from the group consisting of titanium nitride (TiN) claim 1 , titanium aluminum nitride (TiAlN) claim 1 , titanium aluminum silicon nitride (TiAlSiN) claim 1 , titanium aluminum carbonitride (TiAlCN) claim 1 , chromium nitride (CrN) claim 1 , aluminum chromium nitride (AlCrN) claim 1 , and chromium aluminum carbonitride (CrAlCN).5. A gear pump as recited in ...

Compressor Unit and Method for Operating a Compressor Unit

A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit. 1. A compressor unit , including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing , at least one screw rotor that is arranged in the screw rotor chamber , is mounted on the compressor housing to be rotatable about a screw rotor axis and receives gaseous medium having an initial volume that is supplied by way of a low-pressure chamber arranged in the compressor housing and discharges it , compressed to a final volume , in the region of a high-pressure chamber arranged in the compressor housing , and at least one control slider , which is arranged in a slider channel of the compressor housing , is adjacent to the screw rotor and is movable in a direction of displacement parallel to the screw rotor axis and takes a form such that it affects the final volume and/or the initial volume ,there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit.2. A compressor unit according to claim 1 , wherein the at least one compressor operating function is a parameter ...

High pressure pumping system

A pump technology that provides for more effective and efficient transfer of liquids, such as petroleum products and components, to and through pipelines. Such a technology can comprise a type of external gear pump that creates higher flow, resulting in higher pressures in the pipeline, to move the liquids, while providing for longer pump life, simpler and less maintenance, and fewer undesired conditions, with a smaller footprint, in a cost-effective system. Further, one or more portions of the pump can be configured to be easily replaceable to provide for maintenance in place, and provide for longer pump life. Additionally, one or more portions of the pump can be constructed with or coated with abrasive resistant material that extends the life of the external gear pump. Such material can also reduce the friction between surfaces and improve the life of the external gear pump under poor feeding conditions.

Gear Wheel with Meshing Teeth

The invention concerns a gear wheel () having a plurality of identical teeth suitable for meshing in parallel with a similar second gear wheel in a casing () of a hydraulic machine, said gear wheel having a side face of the front toothing () and a side face of the rear toothing () suitable for dragging in rotation against a front bush () and a rear bush (), respectively, said bushes () being slotted onto a sleeve () fixedly connected to the gear wheel (), said helical teeth extending along the entire gear wheel () between the front side face () and the rear side face (), where both the side face of the front toothing () and the side face of the rear toothing () have, at each tooth, a removed rotor portion (), so as to have an area of the side faces of the toothing that does not come into contact with the bush when the latter is placed in abutment against the respective side face of the toothing of the gear wheel. 1. A Gear wheel having a plurality of identical teeth suitable for meshing in parallel with a similar second gear wheel in a casing of a hydraulic machine , said gear wheel having a side face of the front toothing and a side face of the rear toothing suitable for dragging in rotation against a front bush and a rear bush respectively , said bushes being slotted onto a sleeve fixedly connected to the gear wheel , said helical teeth extending along the entire gear wheel between the front side face and the rear side face , wherein both the side face of the front toothing and the side face of the rear toothing have , at each tooth , a rotor portion removed , so as to have an area of the side faces of the toothing that does not come into contact with the bush when the latter is placed in abutment against the respective side face of the toothing of the gear wheel.2. The gear wheel according to claim 1 , wherein said removed portion comprises a chamfer uniformly distributed along the entire perimeter of the side faces of the toothing.3. The gear wheel according to ...

GEAR PUMP INTENDED, IN PARTICULAR, AS A HIGH PRESSURE FUEL PUMP

A geared fuel pump () operates to supply a determined flow but at low or zero pressure rise. It is planned to add gland packing () between support bearings () of the pinions (), or between some of them, to provide hydrodynamic lift for these bearings, by delimiting a closed cavity () to provide lift by a fluid with better viscosity properties instead of using the fluid itself that is pumped. Possible application to fuel pumps for aircraft engines, in which the pump () is a high pressure pump associated with a low pressure pump. 115-. (canceled)164241112171813141920151617189192010461920111247102419201112. Gear fuel pump (′) comprising a housing () , two pinions ( , ) meshing with each other in a chamber of the housing , two first bearings ( , ) each supporting one of two first stubshafts ( , ) of the pinions , two second bearings ( , ) each supporting one of two second stubshafts ( , ) of the pinions , the first bearings and the second bearings being housed in the chamber in the case , the first stubshafts turning in the first bearings ( , ) with first gaps () and the second stubshafts turning in the second bearings ( , ) with second gaps () , the first and the second gaps containing fluid hydrodynamic lift layers , characterised in that it comprises gland packing () between the second bearings ( , ) and the gearwheels ( , ) , said packing isolating closed cavities () surrounding the second gaps () and delimited by the case () , the second bearings ( , ) and the pinions ( , ) , the closed cavities containing a fluid different from a fluid , that is a fuel , pumped by the pinions.17. Gear pump according to claim 16 , characterised in that the viscosity properties of the fluid in the closed cavities are different from the properties of the fuel.1847. Gear pump according to claim 16 , characterised in that the fluid in the closed cavities () is rheo-thickening19243024. Gear pump according to claim 16 , characterised in that either the first bearings or the second ...

Fluid Delivery System With A Shaft Having A Through-Passage

A fluid delivery system having at least one fluid storage device and a pump with at least one fluid driver with a flow-through shaft that has a through-passage. The pump includes a casing, and at least one fluid driver having a prime mover and at least one fluid displacement member. A shaft of the prime mover and/or a shaft of the fluid displacement member and/or a common shaft of the prime mover/fluid displacement member (depending on the configuration of the pump) is a flow-through shaft with a through-passage configuration that allows fluid communication between at least one port of the pump and the at least one fluid storage device. 1. A pump comprising:a casing defining an interior volume, the casing including a first port in fluid communication with the interior volume, and a second port in fluid communication with the interior volume;a first gear disposed within the interior volume, the first gear having a first gear body and a plurality of first gear teeth;a second gear disposed within the interior volume, the second gear having a second gear body and a plurality of second gear teeth projecting radially outwardly from the second gear body, the second gear is disposed such that a second face of at least one tooth of the plurality of second gear teeth aligns with a first face of at least one tooth of the plurality of first gear teeth;a first motor that rotates the first gear about a first axial centerline of the first gear in a first direction to transfer a fluid from the first port to the second port along a first flow path;a second motor that rotates the second gear, independently of the first motor, about a second axial centerline of the second gear in a second direction to contact the second face with the first face and to transfer the fluid from the first port to the second port along a second flow path; andat least one flow-through shaft disposed in at least one of the first motor, the second motor, the first gear and the second gear, each of the at ...

GEAR PUMP FOR COMPRESSIBLE LIQUIDS OR FLUIDS

Disclosed is a gear pump including a pumping chamber in which a first shaft and a second shaft are rotated about their respective axes, each of the first and second shafts supporting at least one hydraulic-pumping element that hydraulically pumps a fluid in the pumping chamber, the at least one hydraulic-pumping element of each of the first and second shafts being positioned in the pumping chamber and each having at least one first radial projection. In the pumping chamber, each of the first and second shafts further supports at least one mechanical drive pinion that rotates each of the first and second shafts, each mechanical drive pinion having second radial projections. The at least one mechanical drive pinion is separate from the at least one hydraulic-pumping element, and the number of the at least one first radial projection and of the second radial projections is different. 1128989. Gear pump () comprising a pumping chamber () in which a first shaft () and a second shaft () are driven in rotation about the respective axis thereof (D , D) ,{'b': 8', '9', '20', '2', '20', '8', '9', '2', '21, 'each of the first and second shafts (, ) bearing at least one hydraulic pumping element () providing the hydraulic pumping of a fluid in the pumping chamber (), said at least one hydraulic pumping element () of each of said first and second shafts (, ) being positioned in said pumping chamber () and each having at least one first radial projection (), wherein'}{'b': 2', '8', '9', '14', '8', '9', '14', '15', '8', '9', '14', '20, 'in the pumping chamber (), each of said first and second shafts (, ) also bears at least one pinion () for mechanically driving in rotation each of said first and second shafts (, ), each mechanical drive pinion () having second radial projections (), wherein, on each of said first and second shafts (, ), said at least one mechanical drive pinion () is distinct from said at least one hydraulic pumping element (),'}{'b': 21', '15, 'and wherein said ...

Rotary Piston Pump With Optimised Inlets And Outlets

A rotary piston pump for the delivery of liquids and for the delivery of liquids containing solids. The rotary piston pump includes a pump housing which is provided with an inlet and an outlet. The pump housing includes a lining. Disposed in the pump housing, or inside the lining, are at least two counter-rotating rotary pistons, which form pump spaces during their rotation. During the rotational movement, the rotary pistons are sealed against one another, against the pump housing and against the lining. Disposed in the pump housing and/or in the lining, in the spatial vicinity of the inlet and/or the outlet, are means with which the pulsation can be reduced or even completely prevented. 1. A rotary piston pump comprising a pump housing which is provided with an inlet and an outlet , the pump housing comprising a lining and there are disposed in the pump housing , or inside the lining , at least two counter-rotating rotary pistons , which form pump spaces during their rotation , wherein the rotary pistons are sealed against one another and against the pump housing , and against the lining , at least two recesses are disposed in each pump space in the pump housing and/or in the lining , wherein the recesses are disposed in the spatial vicinity of the inlet and/or the outlet , the pump housing and/or the lining comprising reinforcements of the lining respectively in the region of the inlet and in the region of the outlet , by means of which reinforcements a cross-sectional reduction is achieved , and that the cross-section of the inlet and the outlet widens from the reinforcements towards ends and that the reinforcements have a wrap angle of more than 180 degrees.2. The rotary piston pump according to claim 1 , the at least two recesses disposed in each pump space comprising four recesses disposed in each pump space claim 1 , the recesses always being disposed in pairs.3. The rotary piston pump according to claim 1 , a pulsation of the rotary piston pump being ...

ROTARY PUMP WITH ROTOR BEARING RING

Lobe pumps have rings which can be located at least partially in at least one of cover plates and rotors, if not both to provide at least thrust bearings to space the rotors from the cover plates. Some rotors may have voids in ears to make the rotor lighter in weight with the voids potentially capped, symmetrically disposed, arcuately shaped and/or have other desirable features. Some rotors may have ears extending beyond cutouts which may extend beyond hubs, if not beyond hub extensions as well which may receive cover spigots thereabout. Some rings may act as radial bearings as well when located in the cover spigots. 1. A rotary lobe pump comprising:a rotor housing assisting defining a cavity intermediate side walls, an end wall and a cover plate;parallel first and second shafts extend into the cavity from the end wall;an inlet port and an outlet port communicating with the cavity;first and second rotors connected to the first and second shafts, respectively; each of the first and second rotors having ears with faces directed toward the cover plate connected to a central hub with the hub connected to the respective first and second shaft; andfirst rings intermediate each of the first and second rotors and the cover plate located at least partially in a first ring groove circumnavigating one of the cover plate and rotor, said first rings providing at least a thrust bearing spacing the faces of the first and second rotors from the cover plate.2. The rotary lobe pump of further comprising (a) cutouts spacing portions of the ears from the shaft and (b) cover spigots extending from the cover plate claim 1 , said cover spigots receiving and surrounding portions of the first and second shafts and extending into the cutouts.3. The rotary lobe pump of wherein the cutout extends a depth of at least ⅓ of a depth of the ears.4. The rotary lobe pump of further comprising voids in the ears.5. The rotary lobe pump of wherein at least some of the voids have a depth greater than a ...

BEARING STRUCTURES FOR GEAR PUMPS

A bearing structure for abutting a pair of gears of a gear pump includes a body including a face on which the gears rotate, an inlet defined in the body, and an outlet defined in the body. The bearing structure includes a sealing portion of the face configured to fluidly seal the inlet from the outlet, the sealing portion being defined as a portion of the face in sealing engagement with the gears at a rotational position of the gears wherein a volume contained by teeth of the gears and the face is constant or about constant as the gears rotate. 1. A bearing structure for abutting a pair of gears of a gear pump , comprising:a body including a face on which the gears rotate;an inlet defined in the body;an outlet defined in the body; anda sealing portion of the face configured to fluidly seal the inlet from the outlet, the sealing portion being defined as a portion of the face in sealing engagement with the gears at a rotational position of the gears wherein a volume contained by teeth of the gears and the face is constant or about constant as the gears rotate.2. The structure of claim 1 , wherein the sealing portion includes a point symmetric shape about a midpoint of the body.3. The structure of claim 2 , wherein the sealing portion includes a main portion having a main portion width.4. The structure of claim 3 , wherein the main portion width is about equal to a root pocket arc length of gear teeth in the pair of gears and wherein the main portion is straight.5. The structure of claim 3 , wherein two 90 degree corners extend from the main portion of the sealing portion on opposite sides of the main portion claim 3 , the corners defining a first edge and a second edge.6. The structure of claim 5 , wherein the first edge and the second edge are flat.7. The structure of claim 6 , wherein the first edge of each corner is defined parallel to a line of action of the gears.8. The structure of claim 7 , wherein the second edge of each corner is defined parallel to a contact ...

GEAR PUMP

A gear pump is provided with: a casing including a suction port configured to suck fluid, and a discharge port configured to expel the pressurized fluid; a gear including a wheel portion with gear teeth and an axially elongated shaft portion, the gear being so housed in the casing as to transport the fluid from the suction port to the discharge port; and a floating bearing rotatably supporting the shaft portion and being movable axially, the floating bearing including a sealing face in contact with the wheel portion, a receiver face axially opposed to the sealing face; and a communication path having an opening on the sealing face and communicating the opening with a third pressurization chamber defined by a third receiver face of the receiver face and the casing. 1. A gear pump for pressurizing and expelling fluid , comprising:a casing including a suction port configured to suck the fluid, and a discharge port configured to expel the pressurized fluid;a gear including a wheel portion rimmed by gear teeth and a shaft portion axially elongated from the wheel portion, the gear being so housed in the casing that the gear teeth, by rotation of the gear about an axis, transport the fluid from the suction port to the discharge port; anda floating bearing rotatably supporting the shaft portion and being movable axially, the floating bearing includinga sealing face in contact with the wheel portion,a receiver face axially opposed to the sealing face, the receiver face includinga first receiver face in combination with the casing defining a first pressurization chamber in communication with the suction port,a second receiver face in combination with the casing defining a second pressurization chamber in communication with the discharge port,a third receiver face in combination with the casing defining a third pressurization chamber, anda communication path having an opening on the sealing face and communicating the opening with the third pressurization chamber.2. The gear ...

GEAR PUMP WITH SELF-LUBRICATING BEARINGS

A gear pump that selectively directs lubrication to certain components within the pump. A system and method of retrofitting existing pumps to improve their longevity in the field. The system and method provides a clean, simple, efficient, and elegant improvement to current gear pump fuel delivery systems. 1. A gear pump comprising:a pump housing including a fluid inlet and a fluid outlet;a drive gear supported on a first shaft, the drive gear being located between a first end portion of the first shaft and a second end portion of the first shaft;a driven gear configured to mesh with the drive gear, the driven gear supported on a second shaft, the driven gear being located between a first end portion of the second shaft and a second end portion of the second shaft;a first journal bearing secured in the pump housing configured to rotatably support the first end portion of the first shaft, the first journal bearing defining a first bearing shaft interface, the first journal bearing including a first high pressure portion, and a first journal fluid flow path that extends between the first high pressure portion and the first bearing shaft interface;a second journal bearing secured in the pump housing configured to rotatably support the second end portion of the first shaft, the second journal bearing defining a second bearing shaft interface, the second journal bearing including a second high pressure portion, and a second journal fluid flow path that extends between the second high pressure portion and the second bearing shaft interface;a third journal bearing secured in the pump housing configured to rotatably support the first end portion of the second shaft, the third journal bearing defines a third bearing shaft interface, the third journal bearing including a third high pressure portion, and a third journal fluid flow path that extends between the third high pressure portion and the third bearing shaft interface;a fourth journal bearing secured in the pump housing ...

PUMP WITH SHAPED FACE SEAL

A sealing arrangement is disclosed for use in a pump. The sealing arrangement can include a first pump component having a first face surface. The first face surface can have a sealing protrusion thereon. A second pump component can have a second face surface positioned in confronting relation to the first face surface. The second pump component can define a sealing cavity for holding a fluid under pressure. The sealing protrusion is positioned to engage the second face surface when the first face surface is pressed against the second face surface so that the sealing protrusion seals against the second face surface to prevent movement of the fluid from the sealing cavity past the sealing protrusion. Other embodiments are described and claimed. 1. A sealing arrangement for a pump , comprisinga first pump component having a first face; anda second pump component having a second face positioned in confronting relation to the first face, the second pump component defining a sealing cavity for holding a fluid under pressure, wherein one of the first face and the second face has a sealing protrusion thereon,wherein the sealing protrusion is positioned to engage an opposing face when the first face and the second face are pressed together so that the sealing protrusion seals against the opposing face to prevent movement of the fluid from the sealing cavity past the sealing protrusion.2. The sealing arrangement of claim 1 , wherein the sealing protrusion has a geometric cross-sectional shape.3. The sealing arrangement of claim 1 , wherein the sealing protrusion has a non-geometric cross-sectional shape.4. The sealing arrangement of claim 1 , wherein the first pump component is a sealing sleeve and the second pump component is a front plate.5. The sealing arrangement of claim 4 , wherein the sealing protrusion is disposed about a cylindrical body portion of the sealing sleeve.6. The sealing arrangement of claim 5 , wherein the sealing protrusion is configured to engage the ...

EXTERNAL GEAR PUMP

An external gear pump includes a pump housing in which a pump chamber is formed, a primary gear having a plurality of external teeth housed in the pump chamber, a secondary gear having a plurality of external teeth that mesh with the plurality of external teeth of the primary gear in the pump chamber, a first electric motor configured to generate a torque for rotationally driving the primary gear, a second electric motor configured to generate a torque for rotationally driving the secondary gear, and a control unit configured to control the first and second electric motors. The control unit controls the first and second electric motors so that the torque generated by the first electric motor is greater than the torque generated by the second electric motor. 1. An external gear pump , comprising:a pump housing in which a pump chamber is formed;a first gear having a plurality of external teeth housed in the pump chamber;a second gear having a plurality of external teeth that mesh with the plurality of external teeth of the first gear in the pump chamber;a first electric motor configured to generate a torque for rotationally driving the first gear;a second electric motor configured to generate a torque for rotationally driving the second gear; anda control unit configured to control the first electric motor and the second electric motor, whereinthe control unit is configured to control the first electric motor and the second electric motor so that the torque generated by the first electric motor is greater than the torque generated by the second electric motor.2. The external gear pump according to claim 1 , whereinthe first electric motor is arranged on one side of the pump chamber in an axial direction parallel to rotation axes of the first gear and the second gear, andthe second electric motor is arranged on the other side of the pump chamber in the axial direction.3. The external gear pump according to claim 1 , wherein the first electric motor and the second ...

VARIABLE FLOW HYDRAULIC MACHINE

A variable flow external rotor hydraulic machine (′) has an inlet (′) an outlet (′), a rotor set having a first rotor (′) mounted for rotation about a first rotor axis and a second rotor (′) mounted for rotation about a second rotor axis, the machine being configured as either a pump or a motor, in which at least one of the first and second rotor axes is movable relative to the other to vary a leakage flow between the rotors. 1. A variable flow external rotor hydraulic machine comprising:an inlet;an outlet;a rotor set having a first rotor mounted for rotation about a first rotor axis and a second rotor mounted for rotation about a second rotor axis, the rotor set being configured to either:(i) when driven, pump fluid from the inlet to the outlet; or,(ii) be driven by a working fluid passing from the inlet to the outlet;in which at least one of the first and second rotor axes is movable relative to the other to vary a leakage flow between the rotors.2. A variable flow external rotor hydraulic machine according to claim 1 , in which the first rotor axis is stationary claim 1 , and the second rotor axis is movable.3. A variable flow external rotor hydraulic machine according to claim 2 , in which the first rotor is connected to a shaft configured to either be:(i) an input shaft driven by an external power source; or,(ii) an output shaft,in which the second rotor is an idler.4. A variable flow external rotor hydraulic machine according to claim 2 , comprising:a housing; and,a carrier movable relative to the housing;in which the second rotor is mounted on the carrier.5. A variable flow external rotor hydraulic machine according to claim 4 , in which the carrier comprises a surface facing the movable rotor claim 4 , in which the movable rotor and surface cooperate to form moving fluid chambers.6. A variable flow external rotor hydraulic machine according to claim 4 , in which the carrier is rotatably mounted in the housing.7. A variable flow external rotor hydraulic ...

FAULT DIAGNOSIS DEVICE FOR FLUID FEED SYSTEM AND FAULT DIAGNOSIS METHOD FOR FLUID FEED SYSTEM

A fault diagnosis device for a fluid feed system comprises a first acquiring part acquiring values as a fluid pressure and pump rotational speed before fluid injection, a second acquiring part acquiring values as a fluid pressure and pump rotational speed during fluid injection, a pump rotational speed difference calculating part calculating a pump rotational speed difference comprising a difference between a pump rotational speed during fluid injection and a pump rotational speed before fluid injection when the fluid pressure before fluid injection and the fluid pressure during fluid injection match, and an abnormality judging part judging if an abnormality has occurred in a flow rate of fluid injected from an injection device based on the pump rotational speed difference. 2. The fault diagnosis device for the fluid feed system according to claim 1 , whereinthe abnormality judging part is configured so as to judge that an abnormality of a decrease in flow rate of fluid injected from the injection device from normal has occurred if the pump rotational speed difference is equal to or less than a predetermined first threshold value smaller than a normal value of the time when there is no abnormality in the fluid feed system.3. The fault diagnosis device for the fluid feed system according to claim 1 , whereinthe abnormality judging part is configured so as to judge that an abnormality of an increase in flow rate of fluid injected from the injection device from normal has occurred if the pump rotational speed difference is equal to or greater than a predetermined second threshold value larger than a normal value of the time when there is no abnormality in the fluid feed system.4. The fault diagnosis device for the fluid feed system according to claim 1 , whereinthe pump rotational speed difference calculating part comprises an estimated value calculating part configured so as to calculate an estimated value of the pump rotational speed, and a fluid pressure difference ...

RECESS-MOUNTED HYDRAULIC PUMP CARTRIDGE AND WORK VEHICLE DRIVETRAIN THEREWITH

A hydraulic pump is configured to mount within an internal receptacle defined by a housing of a hydraulically-powered component of a work vehicle. The pump has a housing defining one or more pump chambers. Each pump chamber communicates with a suction port and an outlet pressure port. Each pump chamber contains a pump assembly having a drive member at a fluid interface between the suction port and the outlet pressure port. The drive member is arranged for co-rotation with at least one power input component extending into the housing through each pump chamber. Rotation of each drive member displaces and pressurizes hydraulic fluid through the pump housing, and, when the pump is mounted within the internal receptacle, through internally ported passages routed through walls of the hydraulically-powered component housing. 1. A hydraulic pump mountable within an internal receptacle defined by a housing of a hydraulically-powered component of a work vehicle , the pump having a housing defining one or more pump chambers , the one or more pump chambers communicating with an associated suction port and an associated outlet pressure port and containing an associated pump assembly , the associated pump assembly having an associated drive member arranged for co-rotation with at least one power input component extending into the housing to rotate the associated drive member and effect displacement of hydraulic fluid at a fluid interface between the associated suction port and the associated outlet pressure port;wherein rotation of the drive member drives the associated pump assembly to displace and pressurize hydraulic fluid through the pump housing, and, when the pump is mounted within the internal receptacle, through internally ported passages routed through walls of the hydraulically-powered component housing.2. The pump of claim 1 , wherein there are a plurality of pump chambers arranged in tandem along a reference axis.3. The pump of claim 2 , wherein the pump housing ...

ELECTRIC MOTOR AND ROD-DRIVEN ROTARY GEAR PUMPS

A downhole pumping apparatus comprising a positive displacement rotary gear pump (RGP), driven by a rotating rod string or a submersible electric motor. 1. A pumping apparatus comprising a positive displacement rotary gear pump (RGP) , driven by a rotating rod string or a submersible electric motor.2. The apparatus of wherein the RGP is driven by a rotating rod string claim 1 , and further comprising a flex coupling.3. The apparatus of wherein the RGP is driven by an electric motor which is an AC induction motor or a permanent magnet motor and further comprising a flex coupling.4. The apparatus of further comprising a speed reducing or speed increasing gearbox disposed between the RGP and the motor.5. The apparatus of wherein the motor is mounted below the RGP.6. The apparatus of wherein the motor is mounted above the RGP.7. The apparatus of wherein the pumping apparatus is conveyed on coiled tubing.8. The apparatus of wherein the pumping apparatus is conveyed on a cable.9. The apparatus of wherein the RGP is conveyed on production tubing and further comprises a sensor operatively connected to the motor to vary motor operation.10. The apparatus of or further comprising a speed increasing or decreasing gearbox disposed between the motor and the RBP.11. The apparatus of or further comprising an oil/gas separator associated with a RGP intake.12. The apparatus of further comprising a drive extension having a splined male end which mates with a splined engagement coupling claim 2 , wherein the flex coupling is disposed between the engagement coupling and a RGP drive shaft.13. The apparatus of comprising a packer disposed on the pump between an intake and a pump discharge head claim 7 , the packer configured to mate with a pump seating nipple installed in a casing or a liner.14. The apparatus of comprising a packer disposed on the pump between an intake and a pump discharge head claim 8 , the packer configured with a surface control line to expand from a running shape to ...

PUMP PROVIDED WITH A SYSTEM FOR COMPENSATING THE INTERNAL PRESSURE

The present document describes a pump () comprising a casing () that encloses a pumping group (). On the casing () at least one inlet conduit for inletting a fluid (F) and at least one outlet conduit for outletting the fluid (F) are obtained. The pumping group () comprises a pair of mutually coupled gears, each mounted on a respective support shaft. The relative movement of a first gear with respect to the second gear defines a pumping chamber having variable volume inside the pumping group (), so as to suck the fluid (F) from the suction conduit to expel it through the delivery conduit. A first support shaft () is operatively connected to an actuator assembly () so that the first gear can operate as a driving gear to set the second gear in rotation. The pump () comprises at least one element () for compensating the increase in volume of the fluid (F) and/or the increase in the pressures inside such a pump (). The element () for compensating the pressure/volume is at least partially manufactured from a shape memory metal alloy having superelastic properties. 110121412141416181020101020. Pump () comprising a casing () enclosing a pumping group () , at least one inlet conduit for inletting a fluid (F) and at least one outlet conduit for outletting said fluid (F) being obtained on said casing () , said pumping group () comprising a pair of mutually coupled gears , each mounted on a respective support shaft , wherein the relative movement of a first gear with respect to the second gear defines a pumping chamber having variable volume inside the pumping group () , so as to suck the fluid (F) from the suction conduit and to eject it through the delivery conduit , a first support shaft () being operatively connected to an actuator assembly () so that the first gear can operate as driving gear to set the second gear in rotation , the pump () comprising at least one element () for compensating the increase in volume of the fluid (F) and/or the increase in the pressures ...

Scavenge gear plate for improved flow

A pump includes a first gear plate and a first pair of counter rotating gears positioned on a first side of the gear plate. The pair of counter rotating gears draws fluid from an inlet and transfers the fluid into an outlet of a common manifold. The gear plate has a cutout to increase the flow of fluid into the common manifold.

System to pump fluid and control thereof

A pump having a fluid driver disposed within the interior volume of the pump and to a method of delivering fluid from an inlet of the pump to an outlet of the pump using the fluid driver. The fluid driver includes a variable-speed and/or a variable torque prime mover and a fluid displacement assembly. The pump can be used in a fluid pumping system to provide fluid to an actuator that is operated by the fluid. At least one of a speed and a torque of the pump is controlled so as to adjust at least one of a flow and a pressure in the fluid pumping system to a desired set point, without the aid of another flow control device.

Toy Fluid Pumping Gun

A fluid pumping device is disclosed. The fluid pumping device includes a housing having a front end and a rear end, a fluid discharge opening in the front end of the housing, a pump assembly, a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly, and a fluid storage reservoir connected to the gear housing from which fluid is drawn into the gear housing to be pumped through the fluid discharge opening. 1. A fluid pumping device comprising:a housing having a top;a fluid discharge opening in the housing;a pump assembly;a fluid storage reservoir connected to the pump assembly;a fluid path connected to the fluid storage reservoir and the fluid discharge opening; anda plurality of nozzles on the top of the housing wherein the nozzles are not fluidly connected to the fluid path and wherein the plurality of nozzles configured to be placed over the fluid discharge opening.2. The fluid pumping device of wherein the pump assembly comprising:a first gear; anda second gear, wherein the first gear is larger in diameter than the second gear and wherein the gear ratio between the first gear and the second gear is 15:1.3. The fluid pumping device of further comprising a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly.4. The fluid pumping device of wherein the crank assembly further comprising:a crank arm; anda crank handle connected to the crank arm.5. The fluid pumping device of wherein the crank arm further comprising at least one notch and wherein the crank handle may be connected to the crank arm through the at least one notch.6. The fluid pumping device of wherein the crank arm further comprising at least two notches and wherein the crank handle may be connected to the crank arm through any one of the at least two notches whereby the length of the crank arm is determined by the position of the crank handle.7. The fluid pumping device of further comprising at ...

A beverage dispensing machine and a gear pump therefor

A gear pump for a beverage dispensing machine, has a pump chamber, and a driving gear wheel meshing with a driven gear wheel inside the pump chamber.

LUBRICATING FLUID SYSTEM FOR A VEHICLE WITH SELF COMPENSATION PLATE

A fluid pump includes a housing defining a cavity. An end plate is disposed within the cavity and divides the cavity into a gear section and an end section. A gear set is disposed within the gear section and comprises at least one gear rotatable about an axis. The end plate is movable longitudinally along the axis for compressing the gear set. A channel is in fluidic communication with the end section for supplying a fluid to the end section to force the plate toward the gear set. 1. A fluid pump comprising:a housing defining a cavity;an end plate disposed within the cavity and dividing the cavity into a gear section and an end section; anda gear set disposed within the gear section and including at least one gear rotatable about an axis;wherein the end plate is movable longitudinally along the axis for compressing the gear set.2. The fluid pump as set forth in further comprising a channel in fluidic communication with the end section for supplying a fluid to the end section to force the plate toward the gear set.3. The fluid pump as set forth in wherein the channel is further defined as at least one hole disposed through the plate to fluidly connect the gear section and the end section.4. The fluid pump as set forth in wherein the gear set divides the cavity into a low pressure side and a high pressure side and wherein the at least one hole disposed through the plate is in fluidic connection with the high pressure side.5. The fluid pump as set forth in wherein the channel is further defined as a passage in fluidic communication with a second fluid pump.6. The fluid pump as set forth in further comprising at least one spring engaging the plate and forcing the plate toward the gear set.7. The fluid pump as set forth in wherein the at least one spring comprises a first spring disposed about the first axis and a second spring disposed about the second axis.8. The fluid pump as set forth in wherein the gear set is further defined as a plurality of gear sets.9. The fluid ...

GEAR PUMP AND METHOD FOR REALISING IT

A gear pump comprising:—a pair of gears () able to interact with a fluid crossing the pump ();—a housing seating () of said pair of gears (), said housing seating () comprising a rest plane () of a shim ();—a delivery conduit () which develops from said housing seating () and comprising an inlet mouth (). The inlet mouth () of the delivery conduit () is at a distance from an intersection () between a rest plane () of the shim () and remaining parts of the housing seating (). 23. The pump according to claim 1 , characterised in that said housing compartment () comprises:{'b': 31', '32', '20', '2', '31', '30, 'a first and a second base (, ) which develop transversally to a direction () parallel to the rotation axis of at least one of said gears (); said first base () comprising said rest plane ();'}{'b': 33', '31', '32', '60', '6', '33', '7, 'a lateral surface () interposed between the first and the second base (, ); said inlet mouth () of the delivery conduit () being entirely fashioned in said lateral surface () and the minimum distance from said intersection () being greater than 10 millimetres.'}353231331310311304. The pump according to claim 2 , characterised in that it comprises a cover () which defines said second base () opposite said first base () and which contributes to delimiting the housing seating (); said first base () comprising a recess () having a bottom () defined by said rest plane () of the shim ().4333046. The pump according to claim 2 , characterised in that said lateral surface () and said rest plane () of the shim () have a surface finish that is better than a surface finish of an initial portion of said delivery conduit ().52. The pump according to claim 1 , characterised in that said pair of gears () are a pair of cogwheels which enmesh with one another and interact with the fluid crossing the pump.78. The method according to claim 6 , characterised in that the step of realising the first body () comprises steps of:{'b': 80', '80', '31', '33 ...

LINEAR ACTUATOR ASSEMBLY AND SYSTEM

A linear actuator system includes a linear actuator and at least one integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with at least one fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to exclusively adjust at least one of a flow and a pressure in the linear actuator system to an operational set point. 1. A hydraulic system comprising:a linear hydraulic actuator having first and second ports; a hydraulic pump having a casing defining an interior volume, the casing having a third port in fluid communication with the interior volume, and a fourth port in fluid communication with the interior volume, the hydraulic pump having least one fluid driver disposed inside the interior volume, each fluid driver having at least one of a variable-speed and a variable torque motor,', 'a first valve assembly in fluid communication with the first and third ports, and', 'a second valve assembly in fluid communication with the second and fourth ports; and, 'an integrated hydraulic pump assembly conjoined with the linear hydraulic actuator, the integrated hydraulic pump assembly to provide hydraulic fluid to operate the linear hydraulic actuator, the integrated hydraulic pump assembly including,'}a controller that establishes at least one of a speed and a torque of the hydraulic pump to exclusively adjust at least one of a flow and a pressure in the hydraulic system to an operational set point.2. The hydraulic system of claim 1 , wherein the integrated hydraulic pump assembly further includes a storage device claim 1 ...

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

OIL PUMP

A fluid pump system for an engine includes a transmission acting as a first pump and a second pump. In one embodiment, the first pump is a scavenge pump and the second pump is a pressure pump with the transmission being a gear set for altering a drive ratio between a transmission input drive and an input drive of the second pump, thereby allowing additional control of a speed of the second pump in comparison to the engine. The transmission, acting as a scavenge pump, can provide a scavenge pump function to an oil pan of the engine, returning engine oil that is present there from both normal drain back and acceleration/deceleration forces. 1. A fluid pump for an engine , comprising:a first shaft for connecting to a drive mechanism for driving the fluid pump;a first housing including a first fluid input port and a first fluid output port; a first driving gear connected to the first shaft to be driven by the first shaft;', 'a first driven gear, the first driving gear engaging the first driven gear to drive the first driven gear, the first driving gear and first driven gear together having a first drive ratio;', 'the transmission also acting as a first fluid pump for pumping fluid from the first fluid input port through the interior of the first housing and out the first fluid output port;, 'a transmission positioned in an interior of the first housing; the transmission includinga second housing including a second fluid input port and a second fluid output port;a second fluid pump positioned in an interior of the second housing, the pressure stage pump operatively connected to the transmission to be driven by the transmission at the drive ratio for pumping fluid from the second fluid input port through the interior of the second housing and out the second fluid output port.21. The fluid pump of claim 1 , wherein the first drive ratio of the first driving gear to first driven gear is 1 to greater than .3. The fluid pump of claim 2 , wherein the second fluid pump includes ...

HYDRAULIC DEVICE

A hydraulic device at least has a pair of helical gears , a body containing the gears, bearing members supporting rotating shafts of the gears , and cover plates liquid-tightly fixed to both end surfaces of the body. The cover plate has a cylinder hole formed at a portion opposite to an end surface of the rotating shaft of the gear which receives two thrust forces F, Fin the same direction, and a piston is inserted through the cylinder hole . A working liquid in a high-pressure side is caused to act on a back surface of the piston and thereby the piston is pressed onto the end surface of the rotating shaft , thereby causing a drag almost balancing a resultant force of the two thrust forces F, Fto act on the rotating shaft . The thrust forces F, Facting on the gear are cancelled by this drag. 1. A hydraulic device at least comprising:a pair of helical gears which each have a rotating shaft provided to extend outward from both end surfaces thereof, and whose tooth portions mesh with each other, the pair of helical gears having a tooth profile including an arc portion at a tooth tip and a tooth root, and forming a continuous line of contact from one end portion to the other end portion in a face width direction at a meshing portion;a body open at both ends and having a hydraulic chamber therein in which the pair of gears are contained in a state of meshing with each other, the hydraulic chamber having an arc-shaped inner peripheral surface with which outer surfaces of the tooth tips of the gears are in sliding contact;a pair of bearing members which are respectively disposed on both sides of the gears in the hydraulic chamber of the body and which support the rotating shafts of the gears so that the rotating shafts are rotatable;a pair of cover plates which are respectively liquid-tightly fixed to both end surfaces of the body to seal the hydraulic chamber,the hydraulic chamber having a low-pressure side defined on one side of the meshing portion of the pair of gears ...

PUMP INTEGRATED WITH TWO INDEPENDENTLY DRIVE PRIME COVERS

A pump having at least two fluid drivers and a method of delivering fluid from an inlet of the pump to an outlet of the pump using the at least two fluid drivers. Each of the fluid drives includes a prime mover and a fluid displacement member. The prime mover drives the fluid displacement member to transfer fluid. The fluid drivers are independently operated. However, the fluid drivers are operated such that contact between the fluid drivers is synchronized. That is, operation of the fluid drivers is synchronized such that the fluid displacement member in each fluid driver makes contact with another fluid displacement member. The contact can include at least one contact point, contact line, or contact area. 188.-. (canceled)89. A pump comprising:a casing defining an interior volume, the casing including a first port in fluid communication with the interior volume, and a second port in fluid communication with the interior volume;a first gear disposed within the interior volume, the first gear having a first gear body and a plurality of first gear teeth;a second gear disposed within the interior volume, the second gear having a second gear body and a plurality of second gear teeth projecting radially outwardly from the second gear body, the second gear is disposed such that a second face of at least one tooth of the plurality of second gear teeth aligns with a first face of at least one tooth of the plurality of first gear teeth;a first motor that rotates the first gear about a first axial centerline of the first gear in a first direction to transfer a fluid from the first port to the second port; anda second motor that rotates the second gear, independently of the first motor, about a second axial centerline of the second gear in a second direction to contact the second face with the first face and to transfer the fluid from the first port to the second port,wherein the first motor is an outer-rotor motor disposed in the interior volume and comprising a first rotor ...

REDUCTION OF CAVITATION IN FUEL PUMPS

A fluid gear pump gear arranged to rotate about a first axis includes a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being formed of a ceramic material. The gear also includes a first shaft on which the first hub portion is carried. 1. A fluid gear pump comprising:a first gear constructed and arranged to rotate about a first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being formed of a ceramic material;a second gear operably coupled to the first gear for rotation about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein at a time in operation the plurality of first teeth and the plurality of second teeth contact at first contact point and a second contact point to create a backlash volume interposed between the first contact point and the second contact point;a first bearing abutting and coaxial to the first hub portion; anda second bearing abutting and coaxial to the second hub portion.2. The fluid gear pump as set forth in claim 1 , wherein the first gear is formed of a silicon-aluminum-oxygen-nitrogen (SiAlON) ceramic.3. The fluid gear pump as set forth in claim 2 , wherein the second gear is formed of a SiAlON ceramic.4. The fluid gear pump as set forth in claim 1 , wherein the first gear is formed of partially stabilized zirconia.5. The fluid gear pump as set forth in claim 4 , wherein the partially stabilized zirconia is doped with yttrium.6. The fluid gear pump set forth in claim 1 , further comprising:a first shaft on which the first gear is carried; anda second shaft on which the ...

REDUCTION OF CAVITATION IN FUEL PUMPS

A fluid gear pump gear arranged to rotate about a first axis. The fluid gear pump gear includes a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being coated with a vapor-deposited of cavitation resistant coating. The gear also includes a first shaft on which the first hub portion is carried. 1. A fluid gear pump comprising:a first gear constructed and arranged to rotate about a first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first teeth being coated with a vapor-deposited of cavitation resistant coating;a second gear operably coupled to the first gear for rotation about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein at a time in operation the plurality of first teeth and the plurality of second teeth contact at first contact point and a second contact point to create a backlash volume interposed between the first contact point and the second contact point;a first bearing abutting and coaxial to the first hub portion; anda second bearing abutting and coaxial to the second hub portion.2. The fluid gear pump as set forth in claim 1 , wherein the coating is deposited by filter arc deposition.3. The fluid gear pump as set forth in claim 2 , wherein the coating is nickel titanium (NiTi).4. The fluid gear pump as set forth in claim 1 , wherein the coating is deposited by chemical vapor deposition (CVD) or physical vapor deposition (PVD).5. The fluid gear pump as set forth in claim 4 , wherein the coating is at least one of titanium nitride claim 4 , titanium aluminium nitride (TiAlN) claim 4 , titanium aluminum silicon nitride or ...

VACUUM PUMP

A vacuum pump according to an embodiment of the present invention includes a pump housing and a cooling pipe. The pump housing is constituted by cast iron. The cooling pipe includes an outer circumferential surface and an inner circumferential surface and is constituted by stainless steel. The cooling pipe passes through the pump housing and the outer circumferential surface which is in close contact with the pump housing, is constituted by a sensitized layer. This vacuum pump is formed such that the pump housing constituted by cast iron is casted around the cooling pipe constituted by stainless steel. The sensitized layer is provided on the outer circumferential surface of the cooling pipe, the sensitized layer is in contact with the pump housing, and the pump housing is efficiently cooled. 1. A vacuum pump , comprising:a pump housing constituted by cast iron; anda cooling pipe which includes an outer circumferential surface and an inner circumferential surface, is constituted by stainless steel, and passes through the pump housing, the outer circumferential surface being in close contact with the pump housing, the outer circumferential surface being constituted by a sensitized layer more preferentially than the inner circumferential surface, solid solution between the sensitized layer and the pump housing being progressed, a liquid medium flowing through the cooling pipe,a thickness of the cooling pipe being 1 mm or more and 5 mm or less, anda first value obtained by dividing a capacity of the pump housing by a second value being 30 or more and 300 or less, the second value being obtained by multiplying the thickness of the cooling pipe by an area in which the cooling pipe being in contact with the pump housing.2. A vacuum pump , comprising:a pump housing constituted by cast iron,a cooling pipe which includes an outer circumferential surface and an inner circumferential surface, is constituted by stainless steel, and passes through the pump housing, the outer ...

VOLUMETRIC GEAR MACHINE WITH HELICAL TEETH

A volumetric gear machine interacting with a working fluid comprising: —a first toothed wheel () with helical teeth comprising a first tooth () in turn comprising a first and a second flank () opposite each other; —a second toothed wheel () with helical teeth having two opposite flanks, the first and the second wheel () being operatively coupled in a meshing area (). At a portion of the meshing area (), the first and the second flank () being in simultaneous contact with the second wheel (). 110-. (canceled)12. The machine according to claim 11 , characterised in that the displacement is greater than half of the angular pitch.13. The machine according to claim 11 , characterised in that:{'br': None, 'i': 'TR−εEL≤', '0.5≤ε1.'}14. The machine according to claim 11 , characterised in that{'br': None, 'i': 'TR−εEL≤', '0≤ε0.5.'}15. The machine according to claim 11 , characterised in that:{'br': None, 'i': 'TR−εEL≥', 'ε0.'}1634. The machine according to claim 11 , characterised in that it is a gear pump claim 11 , all the teeth of the first toothed wheel () meshing in double contact with the teeth of the second wheel ().173113124. The machine according to claim 11 , characterised in that at least one portion of the first and second flank ( claim 11 , ) being involutes of a circle; at least one portion of the flanks of the helical teeth of the second toothed wheel () being involutes of a circle.1831131331431331533143231133313233431331644. The machine according to claim 17 , characterised in that said involute portion of the first flank () extends between a first and a second edge ( claim 17 , ) claim 17 , the first edge () being radially close to a rotation axis () of the first toothed wheel () with respect to the second edge (); the helical teeth of the first wheel comprising a second tooth () consecutive to the first one and facing the first flank (); a first compartment () being afforded as the space interposed between the first tooth () and the second tooth (); in a ...

GEAR ASSEMBLY

A gear assembly includes a primary shaft, a driving gear, a driven gear, a secondary shaft, and a key wherein the primary shaft and the driving gear define a keyway for housing the key. The primary shaft defines a lower region of the keyway while the driving gear defines an upper region of the keyway. The driving gear may be mounted on the primary shaft such that the upper region and the lower regions of the keyway are aligned with each other in order for the keyway to house the key. The driven gear may be mounted on the secondary shaft such that the driven gear may be in meshing engagement with the driven gear. The aforementioned keyway defines a peninsula in a center portion of the driving gear. The peninsula is configured to abut a key disposed within the keyway. 1. A gear assembly comprising:a primary shaft defining a lower region of a keyway;a driving gear defining an upper region of the keyway and being mounted on the primary shaft to align the upper region and the lower region of the keyway; anda driven gear mounted on a secondary shaft, the driven gear being in engagement with the driving gear;wherein the keyway defines a peninsula in a center portion of at least one of the driving gear and the primary shaft and the peninsula is configured to abut a key disposed within the keyway.2. The gear assembly as defined in further comprising a first load distribution region integral to a first side of the peninsula and a second load distribution region integral to a second side of the peninsula.3. The gear assembly as defined in wherein the first load distribution region defines a first recess within the driving gear and the second load distribution region defines a second recess within the driving gear.4. The gear assembly as defined in wherein the key defines a first chamfer claim 3 , a second chamfer claim 3 , and an upper surface disposed between the first and second chamfers.5. The gear assembly as defined in wherein the upper surface of the key is configured to ...

MINIATURE HIGH PRESSURE PUMP AND ELECTRICAL HYDRAULIC ACTUATION SYSTEM

Methods and apparatus pertaining to positive displacement pumps, and further to hydraulic actuation systems. In some embodiments the pumps are gear pumps with bi-directional operation. In some embodiments the actuation system includes a motor-driven, reversible operation gear pump providing fluid under pressure to a rod and cylinder. 1. An apparatus for pumping fluid , comprising:a pair of rotatable intermeshed gears, each gear including a shaft, each gear being located along the corresponding shaft, said gear pair being adapted and configured to simultaneously provide fluid at a higher pressure and fluid at a lower pressure;a pair of substantially identical bearing blocks, each bearing block including a pair of journal bearings, each journal of a bearing block supporting a corresponding shaft of said gear pair, said gear pair being located between said bearing blocks;a casing defining an interior cavity that contains said gears and said bearing blocks, said casing having a pair of opposing end faces;{'b': 1', '6', '2', '5, 'a pair of cover plates, each said cover plate having a face (R, R) being opposite of a face (R, R) of a corresponding bearing block; and'}a pair of face seals, each said face seal having an outer periphery located between one said cover plate and a corresponding end face and an inner periphery located between said same cover plate and a corresponding bearing block, the area between the inner periphery and the outer periphery being divided into first and second lateral regions (A, C) each being laterally adjacent and outboard of the gear pair and two end regions (B, D) each being outboard of a single corresponding gear of said pair;wherein rotation of said gear pair in a first direction provides higher pressure fluid to the first lateral region and lower pressure fluid to the second lateral region, and rotation of said gear pair in a second direction opposite of said first direction provides higher pressure fluid to the second lateral region and ...

GEARS AND GEAR PUMPS

A gear pump includes a drive gear with drive gear teeth and a driven gear with driven gear teeth. The drive gear is rotatably disposed about a drive gear axis. The driven gear is rotatably disposed about a driven gear axis and is intermeshed with the drive gear such that a plurality of driven gear teeth are in sliding contact with a plurality of the driven gear teeth. One or more of the drive gear teeth or the driven gear teeth define within the tooth interior a cavity. The cavity is in fluid communication through an orifice with an inter-tooth volume defined between the contacting drive gear teeth and driven gear teeth such that fluid flows through the orifice to reduce cavitation within fluid confined within the inter-tooth volume. 1. A gear pump , comprising:a drive gear with drive gear teeth supported for rotation about a drive gear axis; anda driven gear with driven gear teeth supported for rotation about a driven gear axis,wherein the drive gear is intermeshed with the driven gear such that an inter-tooth volume is defined between the drive gear and the driven gear,wherein one or more of the drive gear teeth or driven gear teeth define an internal cavity in fluid communication through an orifice with the inter-tooth volume to reduce cavitation in fluid disposed within the inter-tooth volume.2. A gear pump as recited in claim 1 , wherein a center line of the tooth intersects the orifice of the tooth.3. A gear pump as recited in claim 1 , wherein the orifice has a major axis and a minor axis claim 1 , wherein the major axis of the orifice has a length that is greater than a length of the minor axis.4. A gear pump as recited in claim 3 , wherein orifice has a flow area with an ellipsoid shape.5. A gear pump as recited in claim 1 , wherein the orifice is a first orifice claim 1 , wherein flank of the tooth defines a second orifice fluidly coupling the tooth cavity with the external environment.6. A gear pump as recited in claim 5 , where the first orifice is ...

BEARING FACES WITH FLUID CHANNELS FOR GEAR PUMPS

A bearing carrier has a bearing body including a first material. The bearing body has an exterior surface defining a bridge land with a finger cut and rotatably supports a first and second gear. The first and second gears intermesh with one another for pressurizing fluid traversing the gears between a fluid inlet and a fluid outlet defined in a housing enveloping the bearing carrier. The bridge land is defined in a second material integral with the first material. 1. A bearing carrier , comprising:a bearing body of a first material having a bridge land with a finger cut to channel fluid pressurized by intermeshing of gears rotatably supported by the bearing carrier into an outlet defined by a housing enveloping the bearing carrier, wherein the bridge land includes a second material integral with the first material.2. A bearing carrier as recited in claim 1 , wherein the first material is different from the second material.3. A bearing carrier as recited in claim 1 , wherein the second material has a greater ultimate stress than an ultimate stress of the first material.4. A bearing carrier as recited in claim 1 , wherein the second material has a greater yield stress than a yield stress of the first material.5. A bearing carrier as recited in claim 1 , wherein the second material has a thermal coefficient of expansion that is less than a thermal coefficient of expansion of the first material.6. A bearing carrier as recited in claim 1 , wherein the second material has a melting point that is greater than a melting point of the first material.7. A bearing carrier as recited in claim 1 , wherein the density of the second material is less than a density of the first material.8. A bearing carrier as recited in claim 1 , wherein a galvanic potential of the second material is similar to a galvanic potential of the first material.9. A bearing carrier as recited in claim 1 , wherein the first material comprises a copper alloy and the second material comprises monel claim 1 , ...

External Gear Pump Integrated with Two Independently Driven Prime Movers

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate. 1. A pump with self-aligning casing , comprising: an inlet port that provides fluid communication with the interior volume,', 'an outlet port that provides fluid communication with the interior volume,', 'a first protruded portion extending toward the interior volume, the first protruded portion having a first land and first and second recesses,', 'a second protruded portion extending toward the interior volume and opposing the first protruded portion, the second protruded portion having a second land and third and fourth recesses, the first and second protruded portions disposed such that the first land and the second land confront each other and are spaced apart to define a gap;, 'a casing defining an interior volume, the casing including,'} a first support shaft supported by the casing, and', 'a first motor casing housing a first stator and a first rotor and fixedly connected to the first rotor, which drives the first motor casing in a first rotational direction, the first motor casing at least partially disposed in the first recess and the third recess, and', 'a first gear having a plurality of first gear teeth fixedly connected to and projecting radially outwardly from the first motor casing, the first gear teeth disposed in the gap; and, 'a first fluid driver, the ...

GEAR PUMP WITH DEFLECTOR IN FLUID INTAKE FOR DIVERTING FLUID TOWARDS VOIDS IN HOUSING

In accordance with one embodiment, the gear pump comprises a first gear meshed with a second gear as well as a housing, in which the gears are supported. The housing includes a first void, which at least partly adjoins a first side surface of the first gear, and a second void, which at least partly adjoins a second side surface of the first gear. The gear pump further comprises a fluid intake channel configured to direct fluid towards the gears, wherein at least one deflector is arranged within the fluid intake such that an incident fluid flow is diverted towards the first void as well as to the second void. 1. An external gear pump comprising:a first external gear meshed with a second external gear;a housing, in which the gears are supported, wherein the housing includes a first void, which at least partly adjoins a first side surface of the first external gear, and a second void, which at least partly adjoins a second side surface of the first external gear;a fluid intake channel configured to direct fluid towards the gears; andat least one deflector arranged within the fluid intake channel such that an incident fluid flow is diverted towards the first void as well as to the second void.2. The external gear pump according to claim 1 ,wherein the deflector is shaped and positioned such that the incident fluid flow is split into a first portion and at least a second portion, wherein the first portion of the fluid flow is diverted towards the first void and the second portion of the fluid flow is diverted towards the second void.3. The external gear pump according to claim 2 , further comprising a further deflector arranged such so as to guide the first portion of the fluid flow towards the first void.4. The external gear pump according to claim 1 ,wherein the first void is formed by a recess formed in an inner surface of a cover of the housing.5. The external gear pump according to claim 1 , wherein the second void is formed by a recess formed in an inner surface of ...

Electric Oil Pump

Provided is a configuration where a stator section is fastened to an electric motor part-accommodating portion at a location where an end surface of the stator section projects outwardly from an end plane of an opening of an electric motor part-accommodating portion thereby bringing the center of gravity of an electric motor part closer to the end plane of the opening of the electric motor part-accommodating portion. With this, the center of gravity of the electric motor part is brought closer to the end plane of the opening of the electric motor part-accommodating portion so as to make a rotor section difficult to receive the influence of oscillations, and consequently a phenomenon where the rotor section is shaken under the influence of oscillations can be restrained. 1. An electric oil pump comprising:a pump part composed of a pump rotor accommodated in a pump part-accommodating portion formed in a metal pump housing, and a outer rotor;an electric motor part composed of a rotor section having a permanent magnet and housed in an electric motor part-accommodating portion formed in the pump housing, and a stator section having a wire and an iron core;a fastening bracket formed integral with the pump housing to extend radially outwardly from an end plane of an opening of the electric motor part-accommodating portion;a driving rotational shaft which connects the pump rotor to the rotor section; anda pump cover including a discharge port and an intake port which communicate with the pump part, and secured to the pump housing to cover the pump part,the electric oil pump being adapted to rotate the rotor section thereby driving the pump part,wherein the electric oil pump is characterized in that the stator section is fastened to the electric motor part-accommodating portion at a location where the end surface of the stator section projects outwardly from the end plane of the opening of the electric motor part-accommodating portion thereby bringing the center of gravity ...

RECESS-MOUNTED HYDRAULIC PUMP CARTRIDGE AND WORK VEHICLE DRIVETRAIN THEREWITH

A hydraulic pump is configured to mount within an internal receptacle defined by a housing of a hydraulically-powered component of a work vehicle. The pump has a housing defining one or more pump chambers. Each pump chamber communicates with a suction port and an outlet pressure port. Each pump chamber contains a pump assembly having a drive member at a fluid interface between the suction port and the outlet pressure port. The drive member is arranged for co-rotation with at least one power input component extending into the housing through each pump chamber. Rotation of each drive member displaces and pressurizes hydraulic fluid through the pump housing, and, when the pump is mounted within the internal receptacle, through internally ported passages routed through walls of the hydraulically-powered component housing. 1. A hydraulic pump mountable within an internal receptacle defined by a housing of a hydraulically-powered component of a work vehicle , the pump having a housing defining one or more pump chambers , each pump chamber communicating with a suction port and an outlet pressure port and containing a pump assembly , each pump assembly having a drive member arranged for co-rotation with at least one power input component extending into the housing through each of the one or more pump chambers , rotating of the drive member effecting displacement of hydraulic fluid at a fluid interface between the suction port and outlet pressure port;wherein rotation of each drive member drives each pump assembly to displace and pressurize hydraulic fluid through the pump housing, and, when the pump is mounted within the internal receptacle, through internally ported passages routed through walls of the hydraulically-powered component housing.2. The pump of claim 1 , wherein the pump housing defines a plurality of pump chambers arranged in tandem along a reference axis.3. The pump of claim 2 , wherein the pump housing defines at least three pump chambers.4. The pump of ...

Oil pump

An oil pump having a pump housing with a suction-side inlet and with a pressure-side first outlet, which is coupled to a first pump chamber, and with a pressure-side second outlet, which is coupled to a second pump chamber having a first pump rotor which is situated in the first pump chamber so as to be rotatable about a first axis, and having a second pump rotor which is situated in the second pump chamber so as to be rotatable about a second axis, wherein the pump rotors are arranged in a plane, oriented substantially perpendicular to the axes of the pump housing and are coupled by way of an external circumferential toothing.

Linear Actuator Assembly and System

A linear actuator system includes a linear actuator and at least one proportional control valve and at least one pump connected to the linear actuator to provide fluid to operate the linear actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the linear actuator system to an operational set point.

System to Pump Fluid and Control Thereof

A fluid system includes a variable-speed and/or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and/or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump. 130.-. (canceled)31. A hydraulic system comprising:a hydraulic pump with at least one electric motor to provide hydraulic fluid to a hydraulic actuator;a control valve to control a flow of the hydraulic fluid to the hydraulic actuator, wherein the control valve is configured to be throttled; anda controller configured to control the at least one electric motor to maintain a pressure in the hydraulic system to a pressure set point, the controller further configured to concurrently operate the control valve to control the flow to a flow set point.32. The hydraulic system of claim 31 , wherein the hydraulic system is a closed-loop system.33. The hydraulic system of claim 31 , wherein the control valve is throttleable between 0% and 100%.34. The hydraulic system of claim 31 , wherein the control valve is a ball valve.35. The hydraulic system of claim 34 , wherein the controller includes a characteristic curve for the ball valve that correlates a rotational position of the ball valve to a cross-sectional opening of the ball valve.36. The hydraulic system of claim 31 , further comprising:a gear assembly,wherein the at least one electric motor includes a first electric motor and a second electric motor, and the ...

EXTERNAL GEAR PUMP FOR A WASTE HEAT RECOVERY SYSTEM

The invention relates to an external gear pump () having a pump housing (). An inlet (), an outlet (), and a working chamber () are formed in the pump housing (). A first gear (), which is arranged on a first shaft (), and a second gear (), which is arranged on a second shaft (), are arranged in the working chamber () in such a way that said first and second gears mesh with each other. Both gears () have teeth having a tooth width (b). The first shaft () is radially supported in at least one plain bearing (), and the second shaft () is radially supported in at least one further plain bearing (). The plain bearing () has a bearing diameter (D), and the further plain bearing () has a further bearing diameter (D). During operation of the external gear pump (), a delivery volume (V) of a working medium can be conveyed from the inlet () to the outlet (). The two bearing diameters (D, D) are selected in such a way that the ratio V/(D*b) is less than 1.1 and the ratio V/(D*b) is less than 1.1. 11222621121122261112216122636163122abab. An external gear pump () having a pump housing () , wherein an inlet () , an outlet () , and a working chamber () are formed in the pump housing () , wherein a first gear () , which is arranged on a first shaft () , and a second gear () , which is arranged on a second shaft () , are arranged in the working chamber () in such a way that said first and second gears mesh with each other , wherein both of the first and second gears ( , ) have teeth having a tooth width (b) , wherein the first shaft () is radially supported in at least one plain bearing () , and wherein the second shaft () is radially supported in at least one further plain bearing () , wherein the one plain bearing () has a first bearing diameter (D) , and wherein the further plain bearing () has a further bearing diameter (D) , wherein , during operation of the external gear pump () , a delivery volume (V) of a working medium can be conveyed from the inlet () to the outlet () ,{' ...

PUMP ASSEMBLY

A pump assembly comprising a casing having a first pump chamber defining a first flow path and a second pump chamber or more defining a second flow path. A first pump stage includes a first shaft mounted to the casing for rotation about a rotation axis, a first pair of intermeshing gears disposed in the first flow path of the first pump chamber, the first pair of intermeshing gears interfacing each other in operative engagement, one intermeshing gear of the first pump stage mounted on the first shaft. A second pump stage includes a second shaft mounted to the casing for rotation about a rotation axis different than the rotation axis of the first shaft, a second pair of intermeshing gears disposed in the second flow path of the at least second pump chamber, the second pair of intermeshing gears interfacing each other in operative engagement, one intermeshing gear of the second pump stage mounted on the second shaft. A transmission drivingly engages the first shaft to the second shaft. 1. A pump assembly comprising:at least one casing having a first pump chamber defining a first flow path and at least a second pump chamber defining a second flow path;a first pump stage including a first shaft mounted to the casing for rotation about a rotation axis, a first pair of intermeshing gears disposed in the first flow path of the first pump chamber, the first pair of intermeshing gears interfacing each other in operative engagement, one intermeshing gear of the first pump stage mounted on the first shaft;at least a second pump stage including a second shaft mounted to the casing for rotation about a rotation axis different than the rotation axis of the first shaft, a second pair of intermeshing gears disposed in the second flow path of the at least second pump chamber, the second pair of intermeshing gears interfacing each other in operative engagement, one intermeshing gear of the second pump stage mounted on the second shaft; anda transmission drivingly engaging the first ...

VEHICLE HYDRAULIC SUPPLY APPARATUS

A vehicle hydraulic supply apparatus with an oil passage component member that includes a first surface being in contact with a first rotor that is a pump rotor of the mechanical oil pump, a second surface facing in a direction opposite to a direction in which the first surface faces and being in contact with a second rotor that is a pump rotor of the electric oil pump, and a suction oil passage and a discharge oil passage of the mechanical oil pump which are located between the first surface and the second surface, and a suction oil passage and a discharge oil passage of the electric oil pump which are located between the first surface and the second surface. 16-. (canceled)7. A vehicle hydraulic supply apparatus comprising:a mechanical oil pump configured to be driven by a driving source of a wheel;an electric oil pump configured to be driven by an electric motor; andan oil passage component member for the mechanical oil pump and the electric oil pump, wherein a first surface being in contact with a first rotor that is a pump rotor of the mechanical oil pump,', 'a second surface facing in a direction opposite to a direction in which the first surface faces and being in contact with a second rotor that is a pump rotor of the electric oil pump, and', 'a suction oil passage and a discharge oil passage of the mechanical oil pump which are located between the first surface and the second surface, and a suction oil passage and a discharge oil passage of the electric oil pump which are located between the first surface and the second surface,, 'the oil passage component member includes'}a rotation shaft center of the first rotor is disposed parallel to a rotation shaft center of the second rotor, anda rotation direction of the first rotor is opposite to a rotation direction of the second rotor.8. The vehicle hydraulic supply apparatus according to claim 7 , whereinthe oil passage component member includes, in an outer peripheral surface of the oil passage component ...

Variable displacement gear pump

A variable displacement gear pump comprises a fixed gear, a movable gear movable, a fixed gear ring fitted over the movable gear, a movable gear ring fitted over the fixed gear, a fixed cover having a hole in which the fixed gear ring rotates, a movable cover having a hole in which the movable gear ring rotates, a fixed gear block attached to the fixed cover, and a movable gear block attached to the movable cover. The fixed gear is engaged with the movable gear. The movable gear ring rotates in the hole of the movable cover, and the fixed gear ring rotates in the hole of the fixed cover. The movable gear, together with the movable cover, the movable gear, and the movable gear block, move along the direction of the shaft to change a width in which the fixed gear is engaged with the movable gear.

ELECTRIC PUMP

An electric oil pump constructed by integrally combining an electric motor with an oil pump, wherein the electric motor is composed of a motor casing, a drive shaft that is disposed in a motor housing chamber formed inside the motor casing and is rotatably supported, a rotor that is disposed on the drive shaft, and a stator that is located inside the motor housing chamber and is attached to the motor casing. The electric oil pump is equipped with an internal controller that controls application of electric power to the stator so as to cause the drive shaft to be driven to rotate via the rotor. 1. An electric pump comprising an integral combination of a brushless electric , motor and a liquid pump rotatably driven by the electric motor , whereinthe electric motor comprises a motor case, a motor drive shaft that is arranged in a case internal space formed inside the motor case and that is rotatably supported by the motor case, a rotor disposed on the motor drive shaft, and a stator that is positioned inside the case internal space so as to surround and oppose the rotor from the outward circumferential direction and that is mounted on the motor case;electric power application control means is provided for controlling application of electric power to the stator and performing control for rotatably driving the motor drive shaft via the rotor; and a normal control mode for controlling application of electric power to the stator such that the motor drive shaft rotates in accordance with an externally inputted rotation command; and', 'a heat generation control mode for controlling application of electric power to the stator such that the stator generates heat at a higher heating efficiency than the heating efficiency of the stator when the application of electric power is controlled in the normal mode., 'the electric power application control means is provided with3. The electric pump according to claim 1 , whereinbeing provided with a temperature detector for detecting the ...

FLUID-PRESSURE APPARATUS

A pair of meshed gears is disposed in a hydraulic chamber of a housing. Bushes in the chamber contact both end surfaces of the gears. Edge surfaces of the gears are chamfered at intermediate parts between tooth tips and tooth bottoms, and the inclination of the intermediate parts is larger than those of the tooth tips and bottom, thereby protecting the edges from damage due to contact force as the gears mesh and preventing leakage between the gears and the support members. Accordingly, the gears may be operated quietly, at high output efficiency, and increased reliability for an extended period. 1. A fluid-pressure apparatus comprising:a pair of gears which each have a tooth portion formed at an outer peripheral portion thereof and the tooth portions of which mesh with each other;a housing which has a hydraulic chamber in which the pair of gears are contained in a state of meshing with each other, the hydraulic chamber having an arc-shaped inner peripheral surface with which outer surfaces of tooth tips of the pair of gears are in sliding contact;support members which are inserted in the hydraulic chamber of the housing in a state of being respectively in contact with both end surfaces of the gears and support rotating shafts respectively provided to extend outward from both end surfaces of the gears;the housing having an intake flow path and a discharge flow path which respectively open in one side inner surface and another side inner surface of the hydraulic chamber with the pair of gears between them; and 'on edges of the end surfaces of the tooth portions of the gears, chamfering is performed on at least intermediate parts between the tooth tips and the tooth bottoms and the intermediate parts have a roundness or inclination larger than those of the tooth tips and the tooth bottoms.', 'the pair of gears having such a theoretical tooth profile that their tooth surfaces are continuously and linearly in contact with each other in an axial direction of the rotating ...

GEAR PUMP WITH IMPROVED PUMP INLET

Gear pump with meshing gears enclosed by a pump housing, with bearing journals arranged on longitudinal axes and each projecting laterally away from the gears, wherein at least one of the bearing journals has, at least over part of its axial extension, a bearing journal diameter that lies in the range of 90% to 100% of a root diameter of the toothing of the associated gear. A toothing width (b) is at least twice the dimension of a distance (a) between the longitudinal axes, the toothing width (b) being an extension of the gears parallel to the longitudinal axes. 114.-. (canceled)16. The gear pump according to claim 15 , wherein the toothing width b is at most 2a+6h claim 15 , where a is the distance between the longitudinal axes of the gears and h is a tooth height of the gears.17. The gear pump according to claim 15 , wherein the toothing width b lies in a range claim 15 , whose lower limit is 2a and whose upper limit is 2a+2h claim 15 , where a is the distance between the longitudinal axes of the gears and h is a tooth height of the gears.18. The gear pump according to claim 15 , wherein the toothing width b lies in a range claim 15 , whose lower limit is 2a+2h and whose lower limit is 2a+4h claim 15 , where a is the distance between the longitudinal axes of the gears and h is a tooth height of the gears.19. The gear pump according to claim 15 , wherein the toothing width b is 2a+3h claim 15 , where a is the distance between the longitudinal axes of the gears and h is a tooth height of the gears.20. The gear pump according to claim 15 , wherein the maximum opening angle α lies in the range of 20° to 50°.21. The gear pump according to claim 15 , wherein the maximum opening angle α is equal 40°.22. The gear pump according to claim 15 , wherein the cross-section of the pump inlet on the upper toothing plane is square.23. The gear pump according to claim 15 , wherein the wall in the transition region runs in straight lines in all cutting planes passing across a ...

DEVICE FOR PUMPING FLUID

The disclosure herein relates to device, for example a gear pump, for pumping fluid. The gear pump comprise a motor for driving a rotatable drive shaft; a drive gear configured to be driven by the drive shaft; an idler gear which meshes with the drive gear; an annular magnet disposed coaxially with the drive shaft and configured to rotate therewith; and a sensor for sensing rotation of the annular magnet and generating an output signal corresponding to a rotational position of the drive shaft. 11010. A device () for pumping a fluid , wherein the device () comprises:{'b': 20', '22, 'a motor () for driving a rotatable drive shaft ();'}{'b': 30', '22, 'a pump module () to be driven in operation by the drive shaft ();'}{'b': 40', '22', '30, 'a sensor target () operatively associated with at least one of: the drive shaft (), one or more rotatable pumping components of the pump module ();'}{'b': 50', '40', '22', '22', '30, 'a sensor () for sensing a change in property of the sensor target () as the drive shaft () rotates in operation, and for generating an output signal corresponding to a rotational position of at least one of: the drive shaft (), the one or more rotatable pumping components of the pump module (); and'}{'b': 60', '22', '30', '20, 'a controller () that is operable to calculate the rotational position of at least one of: the drive shaft (), the one or more rotatable pumping components of the pump module (), based upon the output signal and to control the motor () based upon the calculated rotational position to ensure that a controlled volume of fluid is pumped.'}2. (canceled)3. (canceled)41050306020. The device () of claim 1 , wherein the sensor () is operable to measure an angular position of an idling rotating pumping component of the pump module () for generating the output signal claim 1 , and the controller () is operable to calculate the calculated rotational position of the idling rotating pumping component for use in controlling the motor () to ...

GEAR PUMP

In accordance with one embodiment, the gear pump comprises a first gear meshed with a second gear as well as a housing, in which the gears are supported. The housing includes a first void, which at least partly adjoins a first side surface of the first gear, and a second void, which at least partly adjoins a second side surface of the first gear. The gear pump further comprises a fluid intake channel configured to direct fluid towards the gears, wherein at least one deflector is arranged within the fluid intake such that an incident fluid flow is diverted towards the first void as well as to the second void. 1. A gear pump comprising:a first gear meshed with a second gear;a housing, in which the gears are supported, wherein the housing includes a first void, which at least partly adjoins a first side surface of the first gear, and a second void, which at least partly adjoins a second side surface of the first gear,a fluid intake channel configured to direct fluid towards the gears; andat least one deflector arranged within the fluid intake such that an incident fluid flow is diverted towards the first void as well as to the second void.2. The gear pump according to claim 1 ,wherein the deflector is shaped and positioned such that the incident fluid flow is split into a first portion and a at least a second portion, wherein the first portion of the fluid flow is diverted towards the first void and the second portion of the fluid flow is diverted towards the second void.3. The gear pump according to further comprising a further deflector arranged such so as to guide the first portion of the fluid flow towards the first void.4. The gear pump according to claim 1 ,wherein the first void is formed by a recess formed in an inner surface of a cover of the housing.5. The gear pump according to claim 1 , wherein the second void is formed by a recess formed in an inner surface of the housing.6. The gear pump according to claim 1 , wherein the second void is formed by an ...

Fluid Delivery System with a Shaft Having a Through-Passage

A fluid delivery system having at least one fluid storage device and a pump with at least one fluid driver with a flow-through shaft that has a through-passage. The pump includes a casing, and at least one fluid driver having a prime mover and at least one fluid displacement member. A shaft of the prime mover and/or a shaft of the fluid displacement member and/or a common shaft of the prime mover/fluid displacement member (depending on the configuration of the pump) is a flow-through shaft with a through-passage configuration that allows fluid communication between at least one port of the pump and the at least one fluid storage device. 124.-. (canceled)25. A pump comprising:a casing defining an interior volume, the casing including a first port in fluid communication with the interior volume, and a second port in fluid communication with the interior volume;a first gear disposed within the interior volume, the first gear having a first gear body and a plurality of first gear teeth;a second gear disposed within the interior volume, the second gear having a second gear body and a plurality of second gear teeth projecting radially outwardly from the second gear body, the second gear is disposed such that a first face of at least one tooth of the plurality of first gear teeth meshes with a second face of at least one tooth of the plurality of second gear teeth when the first gear is rotated;a motor disposed in the interior volume, the motor to rotate the first gear about a first axial centerline of the first gear in a first direction to transfer a fluid from the first port to the second port along a first flow path, a meshing force from the first face to rotate the second gear about a second axial centerline of the second gear in a second direction to transfer the fluid from the first port to the second port along a second flow path; andat least one flow-through shaft disposed in at least one of the motor, the first gear and second gear, each of the at least one flow- ...

Electric pump and method for producing same

An electric pump includes a pump portion including a pump housing and a gear pump which is housed in the pump housing, the pump portion suctioning and discharging a hydraulic fluid by a rotation of the gear pump. The electric pump also includes a motor portion arranged adjacent to the pump portion in a direction along an axis of the pump portion and including a rotor which rotates synchronously with the gear pump and coaxially with the axis, the motor portion including a stator which is arranged at an outer periphery of the rotor and disposed coaxially with the axis, the stator applying a rotation drive force to the rotor. The electric pump further includes a resin portion integrally surrounding at least an outer periphery of the pump housing and an outer periphery of the stator.

SCAVENGE PUMP

The pump can have a pump body, a main cavity having an inlet and an outlet, a rotor rotatably mounted in the main cavity and configured to pump fluid from the inlet to the outlet as it rotates, a separator cavity disposed adjacent the main cavity and configured to sustain a vortex, a fluid passage fluidly connecting the main cavity to the separator cavity, the fluid passage preserving momentum of fluid from the main cavity to the separator cavity to contribute to the vortex. 1. A pump comprising a pump body , a main cavity having an inlet and an outlet , a rotor rotatably mounted in the main cavity and configured to pump fluid from the inlet to the outlet as it rotates , a separator cavity disposed adjacent the main cavity and configured to sustain a vortex , a fluid passage fluidly connecting the main cavity to the separator cavity , the fluid passage being configured for preserving momentum of fluid from the main cavity to the separator cavity to contribute to the vortex.2. The pump of wherein the main cavity has a first cavity portion housing the rotor claim 1 , and a second cavity portion housing a second rotor claim 1 , the first rotor and the second rotor having teeth and being meshed with each other for torque transmission therebetween claim 1 , and forming a gear pump claim 1 , further comprising a second separator cavity claim 1 , and a second fluid passage fluidly connecting the second cavity portion to the second separator cavity the second fluid passage preserving momentum of fluid from the second cavity portion to the second separator cavity to contribute to a second vortex in the second separator cavity.3. The pump of wherein the main cavity and rotor form a first stage claim 1 , further having at least a second stage concentric to and axially offset from the first stage.4. The pump of wherein the separator cavity fluidly connected to both the first stage and the second stage claim 3 , the momentum of fluid from both stages driving the vortex.5. The ...

GEAR PUMP AND GEAR ASSEMBLY

A gear pump that is used to pump fluid, such as oil, in a vehicle. The gear pump comprises a gear assembly having a drive shaft including a drive shaft key; a set of drive gears mounted on the drive shaft, with a drive gear of the set of drive gears being keyed with the drive shaft key; a driven shaft including a driven shaft key; a set of driven gears mounted on the driven shaft, with a driven gear of the driven gear set being keyed with the driven shaft key; and a torque drive feature associated with the drive shaft or the driven shaft, wherein the torque drive feature is configured to check keying with the driven shaft key. 1. A gear pump , comprising: a drive shaft including a drive shaft key;', 'a set of drive gears mounted on the drive shaft, wherein a drive gear of the set of drive gears is keyed with the drive shaft key;', 'a driven shaft including a driven shaft key;', 'a set of driven gears mounted on the driven shaft, wherein the set of drive gears is configured to mesh with the set of driven gears to facilitate fluid flow between the set of drive gears and the set of driven gears, wherein a driven gear of the driven gear set is keyed with the driven shaft key; and', 'a torque drive feature associated with the drive shaft or the driven shaft, wherein the torque drive feature is configured to check keying with the driven shaft key., 'a gear assembly having a terminal end and a drive input end, the gear assembly comprising2. The gear pump of claim 1 , wherein the driven shaft key is a single driven shaft key claim 1 , and wherein the driven gear of the driven gear set that is keyed with the driven shaft key is located closer to the drive input end than any other driven gears of the set of driven gears.3. The gear pump of claim 2 , wherein the other driven gears of the set of driven gears are configured to rotate freely with respect to the driven shaft.4. The gear pump of claim 2 , wherein each drive gear of the set of drive gears are keyed to the drive ...

Gear Pump

A gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a rotor driving the driving gear through a driving shaft, and a sealing member. The pump cylinder is located between the pump body and the sealing member. The driving gear is mounted to or integrally formed with the driving shaft. The open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity, and the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator. 1. A gear pump comprising:a pump body with a fluid inlet and a fluid outlet;a pump cylinder, a driving gear and a driven gear being meshed with each other and received in the pump cylinder, a driving shaft being secured to the driving gear and rotating with the driving gear;a rotor attach to the driving shaft;a stator mounted on an outer housing and surrounding the rotor;a sealing member made of a non-magnetic metal material and disposed between the rotor and the stator, a gap being formed between the sealing member and the rotor to allow the rotor to rotate;wherein the pump cylinder is disposed between the pump body and the sealing member;wherein the sealing member is a cylindrical structure with an open end and an opposite closed end, the open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity;wherein the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator.2. The gear pump as described in claim 1 , wherein an annular flange axially protrudes from the pump cylinder and is inserted into the open end of the sealing member and in contact with an inner surface of the sealing member.3. The gear pump as described in claim 2 , wherein the pump cylinder further has ...

ELASTIC CONTAINMENT ASSEMBLY FOR A PUMP

A containment assembly for a pump provided with at least one pumping group and with at least one power transmission system to such a pumping group. The containment assembly comprises a substantially cylindrical containment vessel provided with an opening at one of the ends thereof, configured to at least partially enclose the pumping group and the respective power transmission system. The containment assembly also comprises at least one closure plate, sealably coupled with the containment vessel at the open end thereof and configured to hermetically enclose, in cooperation with such a containment vessel, the pumping group and the respective power transmission system. On a predetermined contact portion between the containment vessel and the closure plate at least one wave spring is provided, configured to keep the pumping group dynamically under compression by means of the closure plate. 21022242828262226. Containment assembly () according to claim 1 , characterised in that on said predetermined contact portion between the containment vessel () and the closure plate () a contrast ring () is also provided claim 1 , said contrast ring () being arranged in direct contact with the wave spring () and being in abutment against a specific wall of the containment vessel () to ensure a rigid support for said wave spring ().310262824. Containment assembly () according to claim 1 , characterised in that the wave spring () is arranged between the contrast ring () and the closure plate ().41026. Containment assembly () according to claim 1 , characterised in that the wave spring () is a single-coil spring.51026. Containment assembly () according to claim 1 , characterised in that the wave spring () has a rectangle-shaped cross section.610262224. Containment assembly () according to claim 1 , characterised in that the wave spring () has an outer diameter substantially equal to the inner diameter of the containment vessel () and to the outer diameter of the closure plate ().71026. ...

External Gear Pump Integrated with Two Independently Driven Prime Movers

A pump includes a casing defining an interior volume. The pump casing includes at least one balancing plate that can be part of a wall of the pump casing with each balancing plate including a protruding portion having two recesses. Each recess is configured to accept one end of a fluid driver. The balancing plate aligns the fluid displacement members with respect to each other such that the fluid displacement members can pump the fluid when rotated. The balancing plates can include cooling grooves connecting the respective recesses. The cooling grooves ensure that some of the liquid being transferred in the internal volume is directed to bearings disposed in the recesses as the fluid drivers rotate. 137.-. (canceled)38. A method of transferring fluid from an inlet port to an outlet port of a pump including a pump casing that defines an interior volume therein , the pump casing including a first protruded portion and a second protruded portion extending in to the interior volume , the pump further including a first fluid driver with a first gear having a plurality of first gear teeth , and a second fluid driver with a second gear having a plurality of second gear teeth , the method comprising:aligning the first protruded portion to the second protruded portion so as to create a gap between a first land of the first protruded portion and a second land of the second protruded portion;disposing the first fluid driver between a first recess in each of the first and second protruded portions and the second fluid driver between a second recess in each of the first and second protruded portions to align a first axial centerline of the first gear to a second axial centerline of the second gear and to position the plurality of first and second gear teeth in the gap;rotating the first fluid driver to rotate the first gear about the first axial centerline in a first direction to transfer a fluid from the inlet port to the outlet port;rotating the second fluid driver, ...

ROTARY PISTON PUMP HAVING DIRECT DRIVE

The invention relates to a rotary piston pump comprising a pump housing with a pump chamber, an inlet and an outlet opening, a first multi-lobed rotary piston arranged in the pump chamber and rotatably mounted around a first axis and a second multi-lobed rotary piston arranged in the pump chamber which is rotatably mounted around a second axis spaced apart from the first axis and meshes with the first rotary piston, wherein the first and second rotary pistons, by rotating around the first and the second axis respectively, create a fluid flow from the inlet to the outlet opening, a drive unit which is mechanically coupled with the rotary pistons in order to drive the rotary pistons. According to the invention, the drive unit comprises a first electric drive motor, which is mechanically coupled with the first rotary piston for driving the first rotary piston, and a second electric drive motor, which is mechanically coupled with the second rotary piston for driving the second rotary piston. 2. Rotary lobe pump according to claim 1 ,wherein the first drive motor directly drives a first shaft on which the first rotary piston is fixed in a torque-resistant manner and that the second drive motor directly drives a second shaft on which the second rotary piston is fixed in a torque-resistant manner.3. Rotary lobe pump according to claim 1 ,wherein die rotary lobe pump is gearless.4. Rotary lobe pump according to claim 2 ,wherein at least one rotary piston, in particular at least one of the shafts is mounted rotatably on at least one sliding bearing which is lubricated by means of the conveyed fluid medium, preferably that the first and the second shafts are mounted on sliding bearings lubricated by the conveyed fluid medium.5. Rotary lobe pump according to claim 1 ,wherein the mechanical synchronization of the rotational movement of the first and second rotary piston occurs through the intermeshing first and second rotary pistons.6. Rotary lobe pump according to claim 1 , ...

GEAR PUMP

An embodiment of a gear pump arrangement includes a first gear defining a first set of teeth; and a second gear defining a second set of teeth, the first set of teeth and the second set of teeth being in meshed communication such that fluid is pumped in response to rotation of the first gear and the second gear, at least one of the first set of teeth and the second set of teeth having at least one gear tooth passageway through each tooth thereby fluidically connecting opposing faces of the tooth.

Linear Actuator Assembly and System

A linear actuator system includes a linear actuator and at least one proportional control valve and at least one pump connected to the linear actuator to provide fluid to operate the linear actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the linear actuator system to an operational set point. 1. A hydraulic system comprising:a linear hydraulic actuator having first and second ports; a hydraulic pump having a casing defining an interior volume, the casing having an inlet port in fluid communication with the interior volume, and an outlet port in fluid communication with the interior volume, the hydraulic pump having at least one fluid driver disposed inside the interior volume, each fluid driver having at least one of a variable-speed and a variable torque motor, and', 'a control valve assembly comprising a control valve in fluid communication with the linear hydraulic actuator; and, 'a hydraulic pump assembly conjoined with the linear hydraulic actuator, the hydraulic pump assembly to provide hydraulic fluid to operate the linear hydraulic actuator, the hydraulic pump assembly including,'}a controller that establishes at least one of a speed and a torque of the hydraulic pump so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point and concurrently establishes an opening of the control valve so as to maintain at least one of flail the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at ...

HEATING/COOLING SYSTEM FOR INDWELLING HEAT EXCHANGE CATHETER

A cooling system for an indwelling heat exchange catheter includes a heat exchange bath that is configured to receive a conduit that carries saline to and from the catheter. A heating/cooling fluid is in the bath and exchanges heat with the saline. The heating/cooling fluid flows through a heat exchanger that includes a refrigerant and two variable speed DC compressor for removing heat from the refrigerant. A gear pump circulates the working fluid to and from the catheter and is removably engaged with a pump support platform. 122-. (canceled)23. An assembly , comprising:a platform supporting a motor; anda pump engaged with the platform for pumping working fluid to and from a cooling member for a patient, the motor being coupled to the pump to provide power to the pump when the pump is engaged with the platform;wherein the pump support platform includes a first arcuate support collar and a second arcuate support collar, the collars being received in a pump bore in the platform, the pump being received by the support collars in the pump bore.24. The assembly of claim 23 , wherein the pump is removably coupled to the motor.25. The assembly of claim 23 , comprising:a magnet extending from the pump and coupled thereto;a cup-shaped member coupled to the motor to receive the magnet and magnetically engage the magnet such that as the cup-shaped member is rotated by the motor it causes the magnet to rotate which, in turn, causes the pump to pump fluid.26. The assembly of claim 23 , wherein the platform comprises:a pump locking bore, the pump removably engaging the pump locking bore.27. The assembly of claim 23 , comprising:at least one sensor for detecting the presence of the pump when it is engaged with the platform.28. The assembly of claim 23 , wherein the pump is a diaphragm pump.29. The assembly of claim 23 , wherein the platform includes an overflow bore through which any saline that may leak from the pump can flow.30. The assembly of claim 23 , wherein the pump is a ...

ELECTRIC OIL PUMP, IN PARTICULAR FOR A MOTOR VEHICLE

An oil pump, in particular an electric or electromotive auxiliary pump for a motor vehicle, having a housing having an inlet on the admission side and an outlet on the pressure side, in addition to a pump rotor which is inserted in the housing such that it can rotate about an axis, and having at least one rotor part, a flexible housing component which is in the form of an elastic press plate and which extends over the cross-sectional surface of the pump rotor. The flexible pressure plate is maintained, in an advantageous manner, in the edge area of the second housing parts. 1. An oil pump comprising:a housing having an inlet on a suction side and an outlet on a pressure side; anda pump rotor arranged in the housing such that the pump rotor is rotatable about an axis;at least one rotor part; anda flexible housing component in the form of an elastic pressure plate that extends over a cross-sectional area of the pump rotor.2. The oil pump according to claim 1 , wherein the housing has a first housing part as the housing base body claim 1 , which accommodates the pump rotor claim 1 , and a second housing part as the housing cover claim 1 , wherein the flexible pressure plate is held and/or clamped with its outer edge between the housing parts.3. The oil pump according to claim 1 , wherein a pressure chamber is provided on an outer side of the flexible pressure plate situated opposite the pump rotor claim 1 , and wherein the pressure chamber is in connection with the pressure side of the pump on the outlet side.4. The oil pump according to claim 3 , wherein the pressure chamber is formed in an axial direction between the flexible pressure plate and the housing cover.5. The oil pump according to claim 1 , wherein a movably mounted rigid side plate having a passage opening aligned with the outlet on the pressure side is arranged between the flexible pressure plate and the pump rotor.6. The oil pump according to claim 5 , wherein the passage opening of the side plate is ...

Gear pump journal bearing lubrication flow feed

A pump bearing member is disclosed for use in a pump bearing assembly and a gear pump assembly.

Rotary Fluid Machine

A rotary fluid machine that reduces fluid leakage from a gear pump or gear motor and achieves improvement in responsiveness is provided. The present invention is configured such that force of pressing a side plate toward gears by a seal member provided between the side plate and a case and performing pressure compartment is partly strong, not uniform along the entire length of the seal member. Specifically, for example, a gear pump comprises an assembly including a pair of gears, a side plate sealing a side surface of the gears, and a seal block sealing tooth tips of the gears, a case housing the pump assembly, and a seal member being arranged between the side plate or the seal block and the case and along a notch portion formed in the side plate or the seal block. The seal member is wider at a portion in a position passing through a place with large pressure fluctuations than at other portions. 1. A rotary fluid machine , comprising:an assembly including a pair of gears, a side plate arranged on a side surface of the gears, and a seal block arranged to cover circumferential portions of the gears;a case housing the assembly; anda seal member being arranged between the side plate or the seal block and the case and along a notch portion formed in the side plate or the seal block to define a high-pressure portion and a low-pressure portion in the case, whereinthe seal member or the notch portion is configured such that, when the assembly is incorporated into the case, force of the seal member pressing the side plate toward the gears becomes partly larger depending on the position of the seal member.2. The rotary fluid machine according to claim 1 , wherein the position with the partly larger force of the seal member pressing the side plate toward the gears corresponds to an engaged portion between the gears.3. The rotary fluid machine according to claim 1 , wherein the position with the partly larger force of the seal member pressing the side plate toward the gears ...

GEARED HYDRAULIC MACHINE AND RELATIVE GEAR WHEEL

A gear wheel for gear pumps/motors including a plurality of asymmetrical teeth, each tooth including a driving side with a convex shape and mating with a corresponding convex side of a counter-wheel and a discharge side defined, in most of its length, as a cavity of a convex profile. The discharge side is configured so that the radius passing through a tip of the teeth is substantially at least tangent to the discharge side, or intersects the discharge side.

GEAR PUMP DEVICE FOR RUBBER EXTRUSION

In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ring inserted in a gear-housing bore of a housing . The bushing ring rotatably supports a support-shaft portion of a gear accommodated in the gear-housing bore . The bushing ring has a bearing and a sealing means built-in. The sealing means includes a seal ring of which cross section is ]-shaped and which has a first lip portion contacting with the outer peripheral surface of the support-shaft portion , a second lip portion disposed outside thereof in the radial direction, and a side wall portion connecting between outer ends in the axial direction, of the first and second lip portions 1. A gear pump device for rubber extrusion ,which has a pair of gears engaged with each other, a housing having a gear-housing bore housing a pair of the gears, and a bushing ring inserted in the gear-housing bore at end portions thereof in the axial direction, and the gear has a gear portion and a shaft portion concentrically extending from the gear portion toward both sides in the axial direction,', 'the bushing ring has a bearing and a sealing means built-in, the bearing rotatably supporting the support-shaft portion, and the sealing means disposed inward of the bearing in the axial direction and sealing between it and the outer peripheral surface of the support-shaft portion, and', 'the sealing means includes a sealing ring which is formed from a rubber elastic body whose cross section is ]-shaped and which has a cylindrical first lip portion contacting with the outer peripheral surface of the support-shaft portion, a cylindrical second lip portion disposed outside thereof in the radial direction, and a side wall portion connecting between axially outer ends of the first and second lip portions., 'which is characterized in that'}2. The gear pump device for rubber extrusion as set forth in claim 1 ...

FLUID DELIVERY DEVICE

A fluid delivery device having a forepump and a main pump fluidically connected to the forepump, wherein the forepump can be driven via a forepump input shaft and the main pump can be driven via a main pump input shaft. According to the invention, the forepump has a forepump drive gear coupled to the forepump input shaft and a forepump delivery gear interacting with the forepump drive gear to deliver the fluid, wherein the forepump and the main pump are drivingly coupled to a common drive shaft, and wherein the forepump delivery gear and the main pump input shaft are connected to one another via a connecting shaft such that the forepump input shaft is coupled directly to the drive shaft and the main pump input shaft is coupled to the drive shaft via the connecting shaft. 110-. (canceled)11. A fluid delivery device having a forepump and a main pump fluidically connected to the forepump , wherein the forepump is driven via a forepump input shaft and the main pump is driven via a main pump input shaft , and wherein the forepump has a forepump fluid inlet and a forepump fluid outlet and the main pump has a main pump fluid inlet and a main pump fluid outlet , wherein a delivery device fluid inlet of the fluid delivery device is fluidically connected to the forepump fluid inlet , the forepump fluid outlet is fluidically connected to the main pump fluid inlet , and the main pump fluid outlet is fluidically connected to the delivery device fluid outlet of the fluid delivery device , wherein the forepump has a forepump drive gear coupled to the forepump input shaft and a forepump delivery gear interacting with the forepump drive gear to deliver the fluid , wherein the forepump and the main pump are drivingly coupled to a common drive shaft , and wherein the forepump delivery gear and the main pump input shaft are connected to one another via a connecting shaft such that the forepump input shaft is coupled directly to the drive shaft and the main pump input shaft is coupled ...

PUMP FOR AN ADDITIVE

The invention relates to a pump () intended to pump an additive in an SCR system for a vehicle. The pump is configured to rotate in a first direction of rotation in order to convey additive stored in a tank towards an injector via an injection channel. The pump includes a chamber () which houses a gear system (). The chamber () is in fluid communication with the tank and the injection channel via an inlet channel () and an outlet channel () respectively. The pump is such that the inlet channel and the outlet channel are arranged so that after draining the injection channel, the chamber collects and retains the additive. 1: A pump intended to pump an additive in a vehicle SCR system , the pump being configured to rotate in a first direction of rotation to convey additive stored in a tank to an injector via an injection duct , the pump comprising a chamber in which is housed a system of gears , the chamber comprising an upper wall , a bottom wall and a side wall connecting the upper wall and the bottom wall , the chamber being placed in fluidic communication with the tank and the injection duct via , respectively , an inlet duct and an outlet duct ,wherein the inlet duct and the outlet duct are arranged in such a way that, after the injection duct has been purged, the chamber collects and holds some additive, and in that the outlet duct is connected:to the upper wall of the chamber; orto the side wall of the chamber and at a non-zero distance away from the bottom wall.2: The pump as claimed in claim 1 , wherein the outlet duct comprises a siphon-form section connected to the upper wall or side wall of the chamber and at a non-zero distance away from the bottom wall.3: The pump as claimed in claim 1 , wherein the inlet duct comprises a siphon-form section connected to the upper wall or side wall of the chamber and at a non-zero distance away from the bottom wall.4: The pump as claimed in claim 1 , wherein the pump is configured to rotate in a second direction of ...

STEPPING MOTOR DRIVE APPARATUS, GEAR PUMP, AND STEPPING MOTOR-DRIVEN GEAR PUMP SYSTEM

A stepping motor-driven system includes a stepping motor, an output device, and a belt and pulley system operably coupling the stepping motor with the output device to impart rotation therebetween. The belt and pulley system includes an input pinion engaged with the stepping motor, an output pinion engaged with the output device, and a timing belt. The timing belt is disposed about the input and output pinions, inhibits elongation, and defines a plurality of spaced-apart grooves on an inwardly-facing surface thereof that are wider than the teeth of the pinions and are configured to receive the teeth of the pinions in meshed engagement therewith. As a result, a gap is defined within each groove. The gaps permit backlash of the timing belt in response to changes in a rotational speed input to the belt and pulley system from the stepping motor, thereby inhibiting loss of control. 1. A gear pump system , comprising: a drive shaft defining a first end portion and a second end portion, wherein the first end portion of the drive shaft is configured to receive the rotational input to rotate the drive shaft;', 'an enclosure defining a chamber and including a fluid input and a fluid output, wherein the second end portion of the drive shaft extends through the enclosure into the chamber;', 'a drive gear engaged about the second end portion of the drive shaft within the chamber;', 'a passive shaft rotatably mounted within the chamber; and', 'a passive gear engaged about the passive shaft within the chamber and disposed in meshed engagement with the drive gear, wherein rotation of the drive gear rotates the passive gear to urge fluid from the fluid input towards the fluid output,', 'wherein the second end portion of drive shaft is rotatably and sealingly engaged with the enclosure at first and second locations via first and second ball bearing assemblies., 'a gear pump configured to receive a rotational input, the gear pump including2. The gear pump system according to claim 1 , ...

ENERGY TRANSFORMING UNIT AND ENERGY TRANSFORMING SYSTEM COMPRISING SUCH A UNIT

The present invention relates to an energy transforming unit adapted to convert reciprocating forces into rotating axle movements on at least one force transmitting axle and/or into electrical power. The unit comprises at least one restriction device which is directly connected to the force and which is arranged to forward the incoming reciprocating forces into a movement over at least one conversion module. The energy transforming unit is characterized in that the at least one restriction device is delimiting one, by the energy transforming unit enclosed reciprocating volume which entirely or partly passes through the at least one conversion module. The reciprocating volume can comprise a non-compressible fluid arranged to forward the incoming forces into a reciprocating fluid movement over the at least one conversion module and/or the reciprocating volume can comprise at least one mechanical force transmitting arrangement adapted to the at least one conversion module. The unit further comprises a compact central unit which at least partly encloses the at least one conversion module. 1. (canceled)2. An energy transforming unit adapted to convert external forces (F) into rotating axle movements on at least one force transmitting axle or directly into electric power , wherein the energy transforming unit comprises:a conversion module adapted to convert the external forces into rotating axle movements or into electric power,at least one restriction device which is arranged to forward the external forces (F) into reciprocating movement over the conversion module, the restriction device is arranged to forward the external force (F) into a reciprocating movement of the fluid,', 'the external forces (F) are forwarded into reciprocating movements over the conversion module by means of the reciprocating movement of the fluid and/or a reciprocating movement of a mechanical arrangement, and wherein ,', 'the energy transforming unit further comprises at least one yielding ...

HYDRAULIC LIMITED DIFFERENTIAL SLIP

A positive displacement pump for hydraulic limited differential comprises a first external gear and a second external gear juxtaposed inside a casing, wherein one or more outer teeth sections of the external gear are tangential to the casing. The casing is filled with a fluid via an opening and sealed using a plug member on both sides to define a fluid tight sealing configuration and a pair of shafts are configured to couple the first external gear and the second external gear. The clockwise rotation of the first external gear is configured to drive the second external gear in counter clockwise direction in the casing to allow the movement of the fluid inside the casing via one or more countersinks to create a pressure difference for internal leakage of the fluid in the permitted gaps to control the differential slip for increasing the stability of the driving vehicle. 1. A positive displacement pump for hydraulic limited differential in a vehicle , comprises:a first external gear and a second external gear juxtaposed inside a casing, wherein one or more outer teeth sections of the external gear are tangential to the casing;a crown wheel is configured to encompass the casing and takes the receiving force from a pinion to drive the axle shafts of the vehicle via the positive displacement pump;wherein the casing is filled with a fluid via an opening and sealed using a plug member on both sides to define a fluid tight sealing configuration;a pair of shafts are configured to couple the first external gear and the second external gear, wherein the clockwise rotation of the first external gear is configured to drive the second external gear in counter clockwise direction in the casing to allow the movement of the fluid inside the casing; anda channel is disposed in the casing configured to connect one or more countersinks created on both sides of the first external gear and the second external gear respectively, wherein the movement of the fluid in the casing creates a ...

Gear pump driven gear pressure loaded bearing

One embodiment includes a gear pump with a driven gear, a gear shaft passing through the driven gear, and a pressure loaded journal bearing. Also included is a fluid film, between a surface of the pressure loaded journal bearing and a surface of the gear shaft, and a hybrid pad on the pressure loaded journal bearing. The hybrid pad has a minimum leading edge angular location on the pressure loaded journal bearing of 41.5° and a maximum trailing edge angular location on the pressure loaded journal bearing of 54.5°. The gear pump also includes a porting path for supplying high pressure fluid from a discharge of the gear pump to the fluid film at the hybrid pad.

ANTI-DECOMPRESSION GEAR FUEL PUMP FOR BROKEN BUBBLES

The present invention discloses an anti-decompression gear fuel pump for broken bubbles, characterized by comprising: a drive motor; and a pump body and a pump cover successively installed on the top end of the drive motor, wherein the pump body is provided with a groove, and a driving gear, a left driven gear and a right driven gear which are installed in the groove and are linked through a motor shaft of the drive motor; meanwhile, the driving gear is respectively internally engaged with the left driven gear and the right driven gear; the pump cover is provided with an A end of a fuel outlet, a D end of a circulating fuel outlet, a B end of a circulating fuel inlet, and a C end of a fuel inlet; and the A end of the fuel outlet, the D end of the circulating fuel outlet, the B end of the circulating fuel inlet, and the C end of the fuel inlet are penetrated into the groove of the pump body. The anti-decompression gear fuel pump for broken bubbles, designed in the present invention, not only solves a decompression problem generated because bubbles appear in a fuel pipeline, but also has scientific and reasonable structure. 1123124561456378910789102. An anti-decompression gear fuel pump for broken bubbles , characterized by comprising: a drive motor (); and a pump body () and a pump cover () successively installed on the top end of the drive motor () , wherein the pump body () is provided with a groove , and a driving gear () , a left driven gear () and a right driven gear () which are installed in the groove and are linked through a motor shaft of the drive motor (); meanwhile , the driving gear () is respectively internally engaged with the left driven gear () and the right driven gear (); the pump cover () is provided with an A end () of a fuel outlet , a D end () of a circulating fuel outlet , a B end () of a circulating fuel inlet , and a C end () of a fuel inlet; and the A end () of the fuel outlet , the D end () of the circulating fuel outlet , the B end () of ...

Serviceable fluid pump

A serviceable pump includes a motor disposed at an end of the serviceable pump and connected to a gear portion with a pump shaft. The gear portion receives fluid from and outputs fluid to a system such as a deep fryer cooking system. The gear portion includes at least one channel for receiving fluid, such as oil, to lubricate the gears and a fluid discharge aperture to push fluid into a cooling loop at a first end of the cooling loop. The cooling loop cools the fluid passing through the serviceable pump and is disposed between the motor and the gear portion. The cooling loop is connected to a seal assembly that surrounds the pump input shaft at a second end of the loop. The seal assembly allows the cooled fluid to pass along the pump input shaft.

Controlled variable delivery external gear machine

A controlled variable delivery external gear machine (VD-EGM). The VD-EGM includes a housing, an inlet, a drive gear, a driven gear, the drive gear configured to engage the driven gear in an angular mesh zone, an outlet, a first slider comprising a first longitudinal portion connected to a second longitudinal portion such that longitudinal forces applied to the first and second longitudinal portions substantially cancel each other thereby requiring between about 0 N to about 20 N to longitudinally moving the first slider, selective positioning of the first slider configured to vary net operational volumes of fluid communication between the inlet and the outlet, for a given rotational speed of the drive gear, and a first drive mechanism coupled to the first slider and configured to cause the first slider to slide in a longitudinal direction.

SYSTEM AND METHOD FOR ACTIVE ADHESIVE RECIRCULATION CONTROL

A method for controlling a recirculation pump assembly is disclosed. The method includes receiving a process-dependent characteristic and determining a recirculation flow rate of adhesive that flows to the recirculation pump assembly based on the process-dependent characteristic. The method further includes determining a recirculation pump speed of the recirculation pump assembly for pumping the adhesive to a supply channel using the recirculation flow rate, and adjusting an operating speed of the recirculation pump assembly to match the recirculation pump speed. A system and storage device for performing the above method are also disclosed. 1. A system for controlling a recirculation pump assembly , the system comprising one or more processors and one or more storage devices in electrical communication with the recirculation pump assembly , the system being configured to:receive a process-dependent characteristic;determine a recirculation flow rate of an adhesive that flows to the recirculation pump assembly based on the process-dependent characteristic;determine, based on the recirculation flow rate of the adhesive, a desired recirculation pump speed of the recirculation pump assembly for pumping the adhesive to a supply channel that supplies the adhesive to one or more application pump assemblies separate from the recirculation pump assembly; andadjust an operating speed of the recirculation pump assembly to match the desired recirculation pump speed.2. The system of claim 1 , wherein the process-dependent characteristic includes a maximum pump speed for the one or more application pump assemblies claim 1 , an instantaneous line speed claim 1 , a maximum line speed claim 1 , a pattern length claim 1 , or patterns per minute.3. The system of claim 2 , wherein the instantaneous line speed and the maximum line speed represent a number of substrates per minute or a distance between substrates per minute.4. The system of claim 1 , wherein the process-dependent ...

VARIABLE DELIVERY EXTERNAL GEAR MACHINE

An external gear machine (EGM) includes a housing, an inlet, a drive gear positioned in the housing and configured to be (i) driven by a mechanism when the EGM is operated as a pump, or (ii) drive an external mechanism when the EGM is operated as a motor, the drive gear having a plurality of teeth, a slave gear positioned in the housing having a plurality of teeth and configured to be driven by the drive gear, an outlet formed in the housing and configured to receive at least some of the volume of fluid via an outlet fluid communication channel, a first slider defining an inlet fluid communication channel and the outlet fluid communication channel, selective positioning of the first slider configured to vary net operational volumes of fluid communication between the inlet and the outlet, for a given rotational speed of the drive gear. 1. An external gear machine (EGM) , comprising:a housing;an inlet formed in the housing and configured to receive fluid from a supply;a drive gear disposed in the housing and configured to be (i) driven by a mechanism when the EGM is operated as a pump, or (ii) drive an external mechanism when the EGM is operated as a motor, the drive gear having a plurality of teeth;a slave gear disposed in the housing having a plurality of teeth and configured to be driven by the drive gear, the drive gear configured to engage the slave gear in an angular mesh zone, tooth space volumes defined by tooth spaces between each two consecutive teeth of the drive gear and each two consecutive teeth of the slave gear configured to receive volumes of fluid from the inlet via an inlet fluid communication channel as the corresponding teeth rotate about the inlet;an outlet formed in the housing and configured to receive at least some of the volume of fluid via an outlet fluid communication channel when the corresponding tooth space volumes in the angular mesh zone decrease as the corresponding teeth of the drive gear and slave gear come into contact with each ...

STEPPING MOTOR DRIVE APPARATUS, GEAR PUMP, AND STEPPING MOTOR-DRIVEN GEAR PUMP SYSTEM

A stepping motor-driven system includes a stepping motor, an output device, and a belt and pulley system operably coupling the stepping motor with the output device to impart rotation therebetween. The belt and pulley system includes an input pinion engaged with the stepping motor, an output pinion engaged with the output device, and a timing belt. The timing belt is disposed about the input and output pinions, inhibits elongation, and defines a plurality of spaced-apart grooves on an inwardly-facing surface thereof that are wider than the teeth of the pinions and are configured to receive the teeth of the pinions in meshed engagement therewith. As a result, a gap is defined within each groove. The gaps permit backlash of the timing belt in response to changes in a rotational speed input to the belt and pulley system from the stepping motor, thereby inhibiting loss of control. 1. A stepping motor-driven system , comprising:a stepping motor including a rotor configured to rotate in response to driving of the stepping motor;an output device including a drive shaft; and an input pinion engaged with the rotor of the stepping motor, the input pinion defining a plurality of spaced-apart, annularly arranged first teeth disposed on an outer surface of the input pinion, each tooth defining a first width;', 'an output pinion engaged with the drive shaft of the output device, the output pinion defining a plurality of spaced-apart, annularly arranged second teeth disposed on an outer surface of the output pinion, each second tooth defining a second width equal to the first width; and', 'a timing belt, disposed about the input pinion towards a first end of the timing belt and disposed about the output pinion towards a second end of the timing belt, the timing belt configured to inhibit elongation and defining a plurality of spaced-apart grooves on an inwardly-facing surface thereof, each groove defining a third width greater than each of the first and second widths,', 'wherein ...

FUEL PUMP

An inner gear includes: sliding surface parts that are provided annularly at an outer peripheral part including a plurality of outer teeth on both sides of the inner gear in its axial direction and that slide on a pump housing; recessed parts that are respectively provided radially inward of the sliding surface parts to respectively form fuel chambers, into which fuel flows, between the recessed parts and the pump housing; and a communication hole that communicates between the recessed parts. The inner gear further includes an inclined surface part that is provided at an edge portion of a communicating edge portion on a rotation advance side of the inner gear, to avoid an adjacent part adjacent to an inner peripheral edge portion of each of the sliding surface parts and that is inclined further toward a rear side in a direction to a central part of the communication hole. 1. A fuel pump comprising:an outer gear that includes a plurality of inner teeth;an inner gear that includes a plurality of outer teeth and is eccentric from the outer gear in an eccentric direction to be engaged with the outer gear; anda pump housing that rotatably accommodates the outer gear and the inner gear, wherein:the outer gear and the inner gear expand and contract volume of a plurality of pump chambers formed between both the gears, and rotate to sequentially suction fuel into the plurality of pump chambers and then discharge fuel from the plurality of pump chambers; sliding surface parts that are provided annularly at an outer peripheral part including the plurality of outer teeth respectively on both sides of the inner gear in an axial direction of the inner gear and that slide on the pump housing;', 'recessed parts that are respectively provided radially inward of the sliding surface parts to respectively form fuel chambers, into which fuel flows, between the recessed parts and the pump housing; and', 'a communication hole that communicates between the recessed parts;, 'the inner gear ...

LOW INERTIA LAMINATED ROTOR

A rotor assembly having a plurality of rotor plates mounted to a shaft, and methods of construction for a rotor assembly are disclosed. Each rotor plate in the assembly may be provided with a central opening extending between the first and second sides through which the shaft extends. In one aspect, the rotor plates are provided with a plurality of lobes extending away from the central opening, wherein each of the lobes has a lobe opening extending through the thickness of the plates. In one embodiment, the rotor plates are rotationally stacked to form a helical rotor. 121.-. (canceled)21. A rotor assembly comprising: i. a first side and a second opposite side separated by a first thickness;', 'ii. a central opening extending between the first and second sides;', 'iii. a plurality of lobes extending away from the central opening,', 'iv. wherein the lobes of at least some of the plurality of rotor plates has a lobe opening extending between the first and second sides; and, 'a. a plurality of metal rotor plates, each includingb. a shaft extending through the central opening of each of the plurality of rotor plates;c. wherein the plurality of rotor plates are stacked and secured together to form the rotor assembly such that at least one of the first and second sides of one rotor plate is adjacent to and in contact with at least one of the first and second sides of another rotor plate and such that the rotor plates are secured together at multiple locations about an outer perimeter of each rotor plate.22. The rotor assembly of claim 21 , wherein the rotor plates are rotated with respect to each other to form a helical rotor.23. The rotor assembly of claim 21 , wherein the plurality of rotor plates are secured together at least at tips of each rotor plate lobe.24. The rotor assembly of claim 23 , wherein each of the plurality of lobes of each of the plurality of rotor plates is secured together at least at three locations.25. The rotor assembly of claim 22 , wherein the ...

ELECTRIC HYDRAULIC ACTUATOR

The electric hydraulic cylinder is provided with: the electric motor; the gear pump configured to be driven by the rotation by the electric motor. The electric motor has the motor housing and the rotating shaft supported by the motor housing so as to be freely rotatable. The gear pump has: the drive gear into which the rotating shaft of the electric motor is inserted; the driven gear meshed with the drive gear; and the pump housing configured to accommodate the drive gear and the driven gear, and the motor housing is attached to the pump housing such that the gap is formed between the motor housing and the pump housing in the radial direction of the rotating shaft. 1. An electric hydraulic actuator comprising:an electric motor configured to be rotated by a power supply;a gear pump configured to be driven by rotation of the electric motor; andan actuator configured to be extended/contracted by pressure of working fluid supplied by the gear pump, whereinthe electric motor has a motor housing and a rotating shaft supported by the motor housing so as to be freely rotatable,the gear pump has: a drive gear into which the rotating shaft of the electric motor is inserted, the drive gear being configured so as to be rotated together with rotation of the rotating shaft; a driven gear meshed with the drive gear; and a pump housing configured to accommodate the drive gear and the driven gear, andthe motor housing of the electric motor is attached to the pump housing such that a gap is formed between the motor housing and the pump housing in a radial direction of the rotating shaft.2. The electric hydraulic actuator according to claim 1 , further comprisingan O-ring provided in the gap between the motor housing and the pump housing, the O-ring being configured to elastically support the motor housing in the radial direction.3. The electric hydraulic actuator according to claim 1 , whereinthe pump housing has:a main housing formed with an accommodating concave portion, the ...

KNIFE DRIVE WITH INTEGRAL HYDRAULIC MOTOR FOR A HEADER OF AN AGRICULTURAL HARVESTER

A header for an agricultural harvester comprising first and second drive arm assemblies for connecting to respective cutting assemblies, and a drive unit consisting essentially of a hydraulic motor operatively connected to the first and second drive arm assemblies. Operation of the drive unit results in substantially linear and opposed oscillating motion of the cutting assemblies. 1. A knife drive for a header of an agricultural harvester comprising:first and second drive arm assemblies configured to connect to respective cutting assemblies; anda drive unit consisting essentially of a hydraulic gear motor operatively connected to the first and second drive arm assemblies.2. The knife drive of claim 1 , wherein the hydraulic gear motor includes a pair of gears rotatable about substantially vertical axes claim 1 , and wherein each of the first and second drive arm assemblies are substantially coplanar with the pair of gears of the hydraulic motor.3. The knife drive of claim 1 , wherein the hydraulic gear motor comprises:a housing;a hydraulic fluid inlet in fluid communication with an interior of the housing; and{'b': '4', 'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'a hydraulic fluid outlet in fluid communication with the interior of the housing. , The knife drive of , wherein the hydraulic gear motor further comprises a first gear and a second gear operatively engaged with the first gear, wherein each gear is housed within the housing.'}54. The knife drive of claim claim 1 , wherein the hydraulic fluid inlet and outlet are each positioned between the first and second gears.6. The knife drive of claim 1 , wherein the hydraulic gear motor includes a first gear and a second gear claim 1 , and further comprising a first connecting rod operatively connected to one of the first and second gears and to the first drive arm assembly.7. The knife drive of claim 6 , further comprising a second connecting rod operatively connected to the other of the first and second gears ...