ГИДРАВЛИЧЕСКИЙ БЛОК УПРАВЛЕНИЯ И СПОСОБ УПРАВЛЕНИЯ ГИДРАВЛИЧЕСКИМ УПРАВЛЯЕМЫМ УСТРОЙСТВОМ

Блок и способ предназначены для управления гидравлическим приводом. Блок содержит соединение высокого давления, соединение низкого давления и два рабочих соединения, гидрораспределитель с запорным элементом между питающим соединительным элементом и рабочим соединительным элементом, компенсационный клапан, расположенный между соединением высокого давления и гидрораспределителем, и находится в направлении закрытия под действием давления между компенсационным клапаном и гидрораспределителем. Компенсационный клапан в направлении открытия находится под действием давления из устройства коммутации, которое по выбору подает к компенсационному клапану либо давление для регулирования давления, либо давление для регулирования расхода. Технический результат - оптимизация потребления энергии. 2 н. и 13 з.п. ф-лы, 11 ил.

ПНЕВМОИМПУЛЬСНОЕ УСТРОЙСТВО

Полезная модель относится к средствам пневмообрушения сыпучих материалов и может быть использована как для выгрузки из бункеров трудносыпучих материалов, так и для очистки различных устройств, на поверхностях которых в процессе эксплуатации возможно отложение твёрдых загрязнений. Техническим результатом является повышение качества очистки и обрушения материалов. Пневмоимпульсное устройство содержит первый и второй пневмораспределители и эжектор, а также корпус. В корпусе расположена труба, установленная на входе в трубу крышка, расположенная между крышкой и входом в трубу мембрана и расположенные на крышке штуцеры подвода и отвода воздуха, причем штуцер подвода воздуха связан с выходом первого пневмораспределителя, а штуцер отвода воздуха связан с входом второго пневмораспределителя, выход которого связан с входом эжектора. 5 з.п. ф-лы, 1 ил.

ГИДРАВЛИЧЕСКАЯ НАВЕСНАЯ СИСТЕМА

Тракторная гидравлика значительно упростит и удешевит производство тракторов. Отпадает необходимость устанавливать передний силовой цилиндр, гидрораспределитель остается односекционным. Устройство найдет применение на малогабаритных тракторах или каких-либо специальных шасси. 1 ил.

Hydraulische oder pneumatische Klauenkupplung

Einrichtung zum Schutz gegen UEberlastung fuer Maschinen mit hydraulischer Steuerung, insbesondere fuer Schneckenzentrifugen

Hydraulische Feststellvorrichtung fuer Gelenke

Geschwindigkeitssteuereinrichtung

Anordnung zur Verbindung eines Reglers mit einem pneumatischen Stellglied

Control systems for downhole tools

Automatic valve for reducing the flow of liquid in a hydraulic or other system

... 754,890. Hydraulic brakes. SJOBERG, K. E. July 16, 1954, No. 20819/54. Class 103 (1). [Also in Group XXIX] A check valve applicable to hydraulic braking systems requiring some delay in application but immediate release consists of a valve member 1 with a narrow passage 3 to provide a restricted flow from d to e when the valve member is in engagement with a seat 5, and a number of external, axial channels 4 which allow unrestricted flow from e to d when the valve member is urged into engagement with a shoulder 21. By-passes 6, 7 round the valve contain an adjustable needle valve 8 and a cutoff valve 9, the latter when open rendering the valve member 1 ineffective in reducing flow. The valve may be employed to delay the application of the front brakes of a vehicle.

Safety valve for hydraulic systems

... 1,145,604. Power steering. DANFOSS A/S. 17 March, 1967 [26 March, 1966], No. 12722/67. Heading B7H. [Also in Division F2] A power steering circuit includes an hydraulic actuator 9, 10, 11, connected to the steered wheels, a control unit 4 connected with a steering wheel, a pump 3 driven by a motor 2, a reservoir 1, and a safety valve 18, see Division P2, to relieve fluid pressure from either one of conduits 16 and, 17 leading to the actuator, when an external force acts upon the steered wheels, e.g. if they strike an obstacle. The valve has a single ball closure (23), Fig. 2 (not shown), loaded by a spring (24), and is arranged, when a pressure builds up in one conduit, to relieve to the other or to the reservoir 1.

Control arrangement for use with hydraulic ram and selector mechanism

... 953,164. Fluid-pressure servomotor control systems. TURNER MANUFACTURING CO. Ltd. April 12, 1960 [April 14, 1959], No. 12633/59. Heading G3P. A control arrangement for use with hydraulic ram 37 and selector mechanism of the type disclosed in Specification 860,665, for controlling a valve, such as a butterfly valve 1, comprises an hydraulic pilot circuit P having separate branches for causing movement of the ram selector 23 in opposite directions, valves 15, 16, 17 in the pilot circuit operated, by remote control from means responsive to changes in operating conditions of the valve controlled by the ram and a pair of plungers 28, 29 which are, alternatively, hydraulically locked or displaceable relative to one another and adapted to co-operate to control fluid flow in at least one branch of the pilot circuit. The valves 15, 16 are actuated via diaphragms 11, 7 which are controlled by pressure-sensitive pitot tubes 5, 6 and flow-sensitive pitot tubes 3, 4 respectively, and the valve 17 is ...

Fluid pressure operated systems

... 757,705. Aircraft controls. ELECTRO-HYDRAULICS, Ltd. June 18, 1954 [April 2, 1953], No. 9277/53. Class 4. [Also in GroupXXIX] In a fluid pressure-operated system for aircraft undercarriages, brakes, flaps, and steering mechanism, two pumps are provided, one operating the port services and the other the starboard services, and the system is so arranged that if one pump fails the other pump will supply fluid to both port and starboard services. The system comprises two pumps 2, 2a, driven by separate engines or electric motors and supplied with fluid from header tanks 1, la; it comprises also selectors 3, 3a, main undercarriage jacks 25, 25a and uplock jacks 26, 26a, nose undercarriage jack 27, nose undercarriage door jack 28 and steering jacks 30. One lever or electric switch operates both selectors 3, 3a. Main undercarriage jack 25 is supplied with fluid from pump 2 through pipes 36, selector 3, filter 33, pipe 37, and non-return valve 23. Fluid returns from the jack through shuttle valve ...

Vehicle speed-boosting apparatus

... 1,073,788. Propelling vehicles. WESTING- HOUSE BRAKE & SIGNAL CO Ltd. May 18, 1966 [May 31, 1965], No. 23021/65. Heading B7L. Apparatus for boosting the speed of a vehicle when its speed is below a predetermined value comprises a cylinder 1 having a high pressure inlet 2 and outlet 3, the outer end 5 of a piston 4 within the cylinder being formed with a depression engageable by a lever (not shown) which is contacted by the vehicle wheel to force the piston down at a speed dependent on the speed of the vehicle, the arrangement being such that if the vehicle speed is below the predetermined value a hollow stem 13 carried by the piston 4 operates a valve to allow fluid pressure from the inlet 2 to exert a force on the piston forcing it up and speeding up the vehicle via the lever, and if the vehicle speed is above the predetermined value the stem 13 collapses on engagement with the inlet valve whereby it is not opened. The piston 4 has a wall 6 extending across it forming volumes 8 and 9 connected ...

MECHANISM FOR INTERMITTENTLY CONTROLLING OPERATION OF A MACHINE

Improvements in or relating to differential gears

... 790,542. Controlling differential gearing. MASSEY - HARRIS - FERGUSON (GREAT BRITAIN), Ltd., [formerly MASSEY-HARRIS - FERGUSON (MANUFACTURING, Ltd.]. June 1, 1954 [June 1, 1953], No. 15136/53. Class 80 (2). In an agricultural tractor with an hydraulic power lift for a hitched implement controlled by a hand lever and a differential transmission gear lockable by a friction clutch engaged by an hydraulic servomotor controlled by a valve, an operative connection between the valve and the power lift is such that when the hand lever is positioned to lift the implement the valve is operated to disengage the clutch and the valve is also operated automatically, to disengage the clutch in the event of certain eventualities during the operation of the tractor. Manual means may also be provided for varying the clutch pressure. In Fig. 1, the power lift servomotor is controlled by the hand lever 12 and an overload-release device includes a rod 20 loaded by a reaction spring 21. The pressure in the ...

Control system for aircraft

Apparatus for shaping an extruded article

... 823,768. Shaping extruded articles. DUNLOP RUBBER CO. Ltd. June 28, 1956 [July 5, 1955], No. 19339/55. Class 87(2). Apparatus for shaping an extruded article comprises feeler means adapted to engage the article as it is extruded and to be actuated by it according to its profile, and a shaping device operated by the feeler means adapted to act upon the article to a degree dependent on the actuation of the feeler means. The invention is described in connection with the extrusion of a soft plastic rubber article having a circular cross-section and the compression of the article to an elliptical cross-section 1, Fig. 2. The compression is effected by two rollers 2, 3, the position of the upper roller being controlled by a spring which raises it and a compressed air supply 13 which depresses it through the medium of a diaphragm 14 and head 12. From the rollers the elliptical article is taken by a conveyer 5, Fig. 1, to a measuring device 6. This device, Fig. 3, comprises two rollers 22, 23.

A device for sensing impending stall of an airfoil in a moving air stream

... 1,055,300. Fluid-pressure servomotor systems; controlling fluid flow. BENDIX CORPORATION. June 3, 1964 [June 25, 1963], No.23012/64. Headings G3H and G3P. [Also in Division F1] In a device for sensing impending stall of an aerofoil in a moving air stream, such as a compressor aerofoil, a pressure signal supplied transversely into the air stream adjacent the convex surface of the aerofoil causes separation of the air from the surface when stall is imminent and the resulting increase in pressure is sensed downstream of the separation pressure signal. In an arrangement for controlling fuel flow to a gas turbine engine 360, Fig. 15, a variable frequency tuning fork oscillator 400 receiving a pneumatic pressure through a line 82, produces a pressure pulse signal having a frequency determined by the position of a tuning slug 402 adjustable by throttle lever 404. The tines of the tuning fork are energized by the pneumatic pressure. The signal passes through line 406, a pulse shaper 408 which restores ...

EINRICHTUNG ZUM UMSTELLEN DER BEWEGLICHEN TEILE VON SCHIENENWEICHEN ODER -KREUZUNGEN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

Compressed air aggregate with an exhaust

Drilling flushing throttle valve

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

ЕINRIСНТUNG ZUМ UМSТЕLLЕN DЕR ВЕWЕGLIСНЕN ТЕILЕ VОN SСНIЕNЕNWЕIСНЕN ОDЕR -КRЕUZUNGЕN

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

HYDRAULIC DISTRIBUTOR WITH AN ENTRANCE WITH A SCANNING VALVE

HYDRAULIC LOGIC CIRCUIT WITH CONTROLLED DELAY

ARRANGEMENT FOR ECONOMIC ENERGY SUPPLY OF PNEUMATIC CONTROL SYSTEMS

MECHANISM FOR INTERMITTENTLY CONTROLLING OPERATION OF A MACHINE

PNEUMATIC RATEMETER AND COUNTER

METHOD FOR PROTECTING A COMPONENT OF A HYDRAULIC MACHINE AGAINST EROSION

Ce procédé de protection d'un composant de machine hydraulique contre l'érosion comprend des étapes consistant à préparer à plat plusieurs plaques (300) de matériau synthétique polymérisé, à appliquer une couche d'adhésif (200) sur une face de chaque plaque (300) et à mettre en place (F1) les plaques (300) sur la surface du composant à recouvrir de la couche de revêtement.

COUPLINGS FOR FLUID CONTROLLERS

A coupling comprises a holding member having a U-shaped cross section, and a channel member held by the holding member. The holding member has an upper wall formed with screw bores for use in attaching the holding member to a fluid controller. The channel member comprises a body having an inner channel and fitted in a space between the upper wall of the holding member and a lower wall thereof, a tubular upward projection communicating with the inner channel of the body and having an upper end inserted in a through bore in the upper wall of the holding member to communicate with a downward channel of the fluid controller, and a tubular lateral projection communicating with the inner channel of the body and extending laterally. The upper end of the channel member has an outward flange, and the through bore of the upper wall of the holding member has an inward flange for supporting the flange.

Vorrichtung zur Übertragung eines Druckes von einer Flüssigkeit auf eine andere.

Hydraulische Verstelleinrichtung.

Einrichtung zum Fördern von Flüssigkeit in eine Maschine.

Schalteinrichtung an Hubstapelfahrzeugen für die hydraulische Anlage derselben

Regeleinrichtung mit Druckmittelsteuerung

Radar-Richtantennenanordnung

Hydraulisch gesteuerte elastische Lagerung

Einrichtung zur Axialverschiebung einer geneigten Drehtrommel

Verschlusshaube für den Druckmittelvorratsraum hydraulischer Servomotoren.

Servomotorsteuerung

Appareil de compensation des fuites de fluide d'une installation comportant une canalisation à haute pression alimentée en circuit fermé à partir d'une canalisation à basse pression.

Abdichtungseinrichtung in einer pneumatisch oder hydraulisch arbeitenden Datenverarbeitungsmaschine mit einer rotierbaren Trommel

Vorrichtung zur Umwandlung von Druckimpulsen von relativ kleinem Druck und relativ langer Dauer in Druckimpulse von relativ hohem Druck und relativ kurzer Dauer

Dispositif comprenant un amplificateur à fluide

Druckluft-Aggregat mit einer Entlüftung

Dispositif de transmission de puissance.

Hydraulischer Kraftheber eines Nutzfahrzeugs

Dispositivo a tastiera meccanica con azionamento a fluido per produrre segnali di uscita a fluido

Kraftheber mit hydraulischem Antrieb, insbesondere für an landwirtschaftlichen Schleppern befestigte Arbeitsgeräte.

Ultrarapide hydraulische Steuerungseinrichtung

Frostschutzapparat für mit Druckluft arbeitende Anlagen

Hydraulische Spannvorrichtung an Federantrieb

Pneumatische Kippschaltung mit einem Signaleingang

Band-Antriebsvorrichtung

Hydrostatischer Stromverstärker

Dispositif de retrait rapide d'une partie mobile d'une machine

Zeitglied für pneumatische Signale

MOTEUR PAS A PAS A PRESSION DE FLUIDE.

Zweistufen-Mengenteilventil in einem hydraulischen Kreislauf

Dispositif de distribution sélective de fluide sous pression

Verfahren zum Regeln einer Anlage und Anlage zum Durchführen des Verfahrens

Appareil de commande pneumatique

Dispositif de servo-commande

Drosselvorrichtung

Dispositif pour déplacer un élément mobile bloqué dans une position par un fluide sous pression

SYSTEMS AND METHODS FOR FOAM-BASED HEAT EXCHANGE DURING ENERGY STORAGE AND RECOVERY USING COMPRESSED GAS

In various embodiments, foam is compressed to store energy and/or expanded to recover energy. 119.-. (canceled)20. A method of storing energy , the method comprising:dispersing a heat-transfer liquid within gas to form a first foam having a first foam expansion ratio;compressing the first foam within a first cylinder assembly;thereafter, transferring a second foam to a second cylinder assembly different from the first cylinder assembly, the second foam having a second foam expansion ratio smaller than the first foam expansion ratio;compressing the second foam within the second cylinder assembly;exhausting the compressed second foam from the second cylinder assembly; andstoring at least a gaseous component of the compressed second foam.21. The method of claim 20 , wherein the gas comprises air at approximately atmospheric pressure.22. The method of claim 20 , further comprising transferring the first foam to the first cylinder assembly prior to compressing the first foam within the first cylinder assembly.23. The method of claim 20 , further comprising separating at least a portion of a liquid component from the compressed second foam prior to storing the gaseous component.24. The method of claim 23 , wherein the at least a portion of the liquid component is separated via at least one of mechanical separation or application of ultrasound energy.25. The method of claim 24 , wherein the at least a portion of the liquid component is separated via mechanical separation by at least one of a blade claim 24 , a shear claim 24 , a baffle claim 24 , or a centrifuge.26. The method of claim 20 , wherein storing at least the gaseous component of the compressed second foam comprises storing both the gaseous component and a liquid component of the compressed second foam.27. The method of claim 26 , wherein the gaseous and liquid components are stored in the same storage reservoir.28. The method of claim 20 , wherein (i) after compressing the first foam within the first cylinder ...

Systems and methods for foam-based heat exchange during energy storage and recovery using compressed gas

In various embodiments, foam is compressed to store energy and/or expanded to recover energy.

METHOD FOR PROTECTING A COMPONENT OF A HYDRAULIC MACHINE AGAINST EROSION, COMPONENT MANUFACTURING USING THIS METHOD AND INSTALLATION COMPRISING SUCH COMPONENT

A method for protecting a component of a hydraulic machine against erosion comprises steps involving preparing, in the flat state, several sheets of polymerised synthetic material, in applying a coat of adhesive to one side of each sheet and in laying the sheets on the surface of the component that is to be covered with the layer of coating. 1. A method of protection against erosion of a component of a hydraulic machine of which at least one warped/uneven surface is covered by a protective layer of coating , wherein the method comprises:a) preparing in a flat state several sheets of polymerised synthetic material,b) applying a coat of adhesive at least on one face of each sheet,c) laying the sheets by pushing them against the warped/uneven surface of the component that is to be covered and by constituting the layer of coating using sheets, in such a way that the layer of coating is formed by the sheets prepared in step a).2. The method according to claim 1 , wherein during the step a) the sheet is carried out using a prepolymer base and a hardener.3. The method according to claim 1 , wherein during the step a) claim 1 , the sheet is carried out with a thickness between 0.5 and 3 mm.4. The method according to claim 1 , wherein the method further comprises an intermediary step d) between the steps a) and b) claim 1 , of storing the sheet for finalisation of the polymerisation.5. The method according to claim 4 , wherein the step of storing takes place for several weeks.6. The method according to claim 1 , wherein claim 1 , during the step c) claim 1 , the sheets are laid edge to edge.7. The method according to claim 1 , wherein the method further comprises a step e) claim 1 , prior to the step c) claim 1 , of applying a coat of primer on the surface of the component that is to be covered with the protective layer of coating against erosion and wherein during the step c) the sheet is laid by placing into contact the coat of adhesive and the coat of primer.8. The method ...

VALVES WITH VALVE CLOSING MEMBER ATTACHED TO THE ACTUATED COUNTER-SEAT AND RELATED METHODS

A valve assembly in a reciprocating compressor used in oil and gas industry is provided. The valve assembly comprises an actuator configured to a valve actuating motion and a valve. The valve has a valve seat comprises an inlet port configured to allow a fluid to flow through the valve seat, a counter-seat comprising an outlet port configured to allow the fluid to flow through the counter-seat, and a valve closing member attached to the counter-seat and configured to cover the inlet port when the counter-seat is in a closed position. The counter-seat is configured to receive the valve actuating motion and to move between the closed position and an open position in which the valve closing member does not cover the inlet port thereby selectively allowing the fluid to flow on a flow path which comprises the inlet port and the outlet port. 1. A valve assembly used in a reciprocating compressor for oil and gas industry , the valve assembly comprising:an actuator configured to provide a valve actuating motion; and a valve seat comprising an inlet port configured to allow a fluid to flow through the valve seat;', 'a counter-seat comprising an outlet port configured to allow the fluid to flow through the counter-seat; and, 'a valve having'}a valve closing member attached to the counter-seat and configured to cover the inlet port when the counter seat is in a closed position, wherein the counter-seat is configured to receive the valve actuating motion and to move between the closed position and an open position in which the valve closing member does not cover the inlet port thereby selectively allowing the fluid to flow on a flow path which comprises the inlet port and the outlet port.2. A reciprocating compressor , comprising:an actuator configured to provide a valve actuating motion; and a valve seat comprising an inlet port configured to allow a fluid to flow through the valve seat;', 'a counter-seat comprising an outlet port configured to allow the fluid to flow through ...

BRAKE SYSTEM OF STRADDLE TYPE VEHICLE

A rear brake system has a rod extending from a master cylinder that inputs the operational force of a brake pedal to the master cylinder, a coil spring coaxially arranged with the rod and providing reaction force to return the brake pedal to the state before operating the brake pedal, a reaction adjustment mechanism provided on the rod and configured so as to be movable in the axial direction of the rod. According to the position of the reaction adjustment mechanism in the axial direction of the rod, shrinkage of the coil spring in the axial direction of the rod can be adjusted. 1. A brake system for a straddle type vehicle , said brake system comprising a brake pedal and a master cylinder generating hydraulic pressure by receiving an operational force of the brake pedal , said brake system further comprising:a rod that extends from said master cylinder and inputs the operational force of said brake pedal to said master cylinder;a coil spring that is coaxially arranged with said rod and provides a reaction force on said brake pedal to return said brake pedal to a state before operating said brake pedal;a reaction adjustment mechanism that is provided on said rod and configured so as to be movable in an axial direction of said rod,wherein a shrinkage of said coil spring in the axial direction of said rod can be adjusted according to the position on said rod of said reaction adjustment mechanism.2. The brake system according to claim 1 , wherein the reaction adjustment mechanism is formed integrally or separately on said master cylinder claim 1 , said coil spring is sandwiched by a receiver side retainer abutting on one end of said coil spring and a compression side retainer abutting on the other end of said coil spring claim 1 , said compression side retainer is configured so as to be movable in the axial direction of said rod due to the fact that the compression side retainer is threaded with said rod claim 1 ,a distance between said receiver side retainer and said ...

CONTROL DEVICE FOR A RESERVOIR CHARGING PUMP OF THE BRAKING SYSTEM OF A VEHICLE AND METHOD FOR OPERATING A RESERVOIR CHARGING PUMP OF THE BRAKING SYSTEM OF A VEHICLE

A control device for a reservoir charging pump of a braking system of a vehicle includes: an actuating device designed to actuate the reservoir charging pump into at least one normal mode having a normal rotational speed, and a receiving device designed to receive a variable provided by a vehicle-specific component with respect to a supply voltage provided to the reservoir charging pump. The actuating device is additionally designed to ascertain whether the variable received lies outside a normal value range that is specified for the normal mode, and, if necessary, to actuate the reservoir charging pump from the normal mode into at least one deviation mode having at least one setpoint rotational speed deviating from the normal rotational speed. 112-. (canceled)13. A control device for a reservoir charging pump of a braking system of a vehicle , comprising:an actuating device configured to selectively actuate the reservoir charging pump into at least one of a normal mode having a normal rotational speed and at least one deviation mode; anda receiving device configured to receive a variable with respect to a supply voltage provided to the reservoir charging pump, the variable being provided by a vehicle-specific component;wherein the actuating device is configured to (i) ascertain whether the received variable lies outside a specified value range for the normal mode, and (ii) if the received variable lies outside the specified value range for the normal mode, actuate the reservoir charging pump from the normal mode into the at least one deviation mode having at least one setpoint rotational speed deviating from a normal rotational speed of the normal mode.14. The control device as recited in claim 13 , wherein the actuating device is configured to (i) ascertain whether the received variable lies within a specified first deviation value range claim 13 , and (ii) if the received variable lies within the specified first deviation value range claim 13 , actuate the ...

Hydrostatic Transmission

A hydrostatic transmission comprises a hydraulic pump, a hydraulic motor, first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit, a charge fluid passage, a plurality of first charge check valves and a plurality of second charge check valves. The plurality of first charge cheek valves are interposed between the charge fluid passage and the first main fluid passage so as to allow only flow of fluid from the charge fluid passage to the first main fluid passage when the first main fluid passage is hydraulically depressed relative to the charge fluid passage. The plurality of second charge check valves are interposed between the charge fluid passage and the second main fluid passage so as to allow only flow of fluid from the charge fluid passage to the second main fluid passage when the second main fluid passage is hydraulically depressed relative to the charge fluid passage. 1. A hydrostatic transmission comprising:a hydraulic pump;a hydraulic motor;first and second main fluid passages fluidly connecting the hydraulic pump to the hydraulic motor so as to constitute a closed fluid circuit;a charge fluid passage;a plurality of first charge check valves interposed between the charge fluid passage and the first main fluid passage so as to allow fluid to flow from the charge fluid passage to the first main fluid passage when the first main fluid passage is hydraulically depressed relative to the charge fluid passage; anda plurality of second charge check valves interposed between the charge fluid passage and the second main fluid passage so as to allow fluid to flow from the charge fluid passage to the second main fluid passage when the second main fluid passage is hydraulically depressed relative to the charge fluid passage.2. The hydrostatic transmission according to claim 1 , further comprising:a center section onto which the hydraulic pump and the hydraulic motor are mounted,wherein the ...

AUTOMATIC TRANSMISSION FOR HYBRID VEHICLE

An automatic transmission for a hybrid vehicle comprising a first hydraulic pressure supply source driven with an internal combustion engine; a second hydraulic pressure supply source driven independently of the first supply source; and a regulator valve regulating hydraulic pressure produced by the supply sources. A first oil passage supplying line pressure regulated by the regulator valve to a hydraulic servo operating a friction engagement element; a second oil passage supplying hydraulic pressure discharged from the regulator valve to a lubricated portion via an oil cooler; and a thud oil passage merged with the second oil passage at a point downstream of the oil cooler supplying the hydraulic pressure of the second supply source to the lubricated portion. A first reverse flow prevention mechanism is disposed between the oil cooler and the merging point to prevent reverse flow of hydraulic pressure. 1. An automatic transmission for a hybrid vehicle disposed on a transfer path between an internal combustion engine and wheels and controlled so as to be able to run idle in the case where a vehicle is driven by a rotary electric machine with the internal combustion engine stopped , comprising:a first hydraulic pressure supply source driven in conjunction with the internal combustion engine to produce a hydraulic pressure;a second hydraulic pressure supply source driven by electric power independently of the first hydraulic pressure supply source to produce a hydraulic pressure;a regulator valve that regulates the hydraulic pressure produced by the first hydraulic pressure supply source and the second hydraulic pressure supply source to a line pressure;a first oil passage through which the line pressure regulated by the regulator valve is supplied to a hydraulic servo for engagement and disengagement of a friction engagement element;a second oil passage through which a hydraulic pressure discharged from the regulator valve is supplied to a portion to be lubricated ...

HYDRAULIC CONTROL SYSTEM IN A CONTINUOUSLY VARIABLE TRANSMISSION

A hydraulic control system in a continuously variable transmission () is provided with a pump () for supplying hydraulic fluid, a main line (), a line pressure valve (V), an auxiliary line () and a auxiliary pressure valve (V). The line pressure valve (V) being arranged to control a line pressure LP in the main line () by discharging a surplus of hydraulic fluid supplied by the pump () into the auxiliary line (). The auxiliary pressure valve (V) is arranged to variably control auxiliary pressure AP in the auxiliary line (), preferably in dependence on the line pressure LP in the main line (). 14134293413429942. A hydraulic control system in a continuously variable transmission provided with a pump for the supply of hydraulic fluid , a main line () , a main line pressure valve (V) , an auxiliary line () and an auxiliary pressure valve (V) , whereof the main line pressure valve (V) is arranged to control a hydraulic pressure LP in the main line () , whereto this main line pressure valve (V) is capable of discharging a surplus of the hydraulic fluid supplied by the pump into the auxiliary line () , characterized in that auxiliary pressure valve (V) is controllable whereby this auxiliary pressure valve (V) is capable of controlling of varying hydraulic pressure AP in the auxiliary line ().294241. The hydraulic control system according to claim 1 , characterized in that the auxiliary pressure valve (V) is arranged to control the hydraulic pressure AP in the auxiliary line () in dependency on the hydraulic pressure LP in the main line ().3939. The hydraulic control system according to claim 1 , characterized in that the auxiliary pressure valve (V) is electronically controllable claim 1 , for instance by means of an electromagnet or solenoid (S; S).49. The hydraulic control system according to claim 1 , characterized in that the auxiliary pressure valve (V) is hydraulically controllable5941. The hydraulic control system according to claim 4 , characterized in that the ...

OIL PASSAGE CHANGE-OVER VALVE

An oil passage change-over valve allows an alternate communication from a first opening portion in one side a second and a third opening portion provided in another side to be changed over. A first opening portion is formed in one side of a valve body and the second and third opening portions are formed in another side of the valve body; a valve element within a valve hole of the valve body; and a communicating oil passage is formed in the valve element for alternately communicating the three opening portions. Inside the valve body, there are formed a first oil passage for connecting the valve hole with the first opening portion, a second oil passage for connecting the valve hole with the second opening portion, and a third oil passage for connecting the valve hole with the third opening portion deviated by 120 degrees from the first oil passage, respectively. 1. An oil passage change-over valve comprising:a valve body having a first opening portion formed in one side thereof and a second opening portion and a third opening portion formed in another side thereof;a valve element rotatably provided within a valve hole of the valve body; anda communicating oil passage formed in the valve element for alternately communicating the first opening portion with one of the second opening portion and the third opening portion,wherein, inside the valve body, there are formed a first oil passage for connecting the valve hole with the first opening portion, a second oil passage deviated by 120 degrees from the first oil passage for connecting the valve hole with the second opening portion, and a third oil passage deviated by 120 degrees from the first oil passage for connecting the valve hole with the third opening portion.2. The oil passage change-over valve according to claim 1 , wherein axial centers of the second and third opening portions are positioned in parallel claim 1 , and the second and third oil passages are arcuately bent from the valve hole toward the second and ...

VALVE MANIFOLD

A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position. 120-. (canceled)21. A valve manifold , comprising:a first valve including a first valve member and a second valve member movable relative to the first valve member between a first position and a second position;a second valve fluidly connected to the first valve, the second valve selectively communicating pressurized fluid to the first valve to urge the second valve member between the first position and the second position;a fluid passage fluidly connecting the first valve member of the first valve to the second valve; anda check valve disposed in the delivery valve manifold for controlling an amount of fluid delivered to the second valve.22. The valve manifold of claim 21 , wherein the check valve substantially prevents fluid flowing from the delivery valve manifold to the first valve member of the first valve.23. The valve manifold of claim 21 , wherein the check valve is a ball check valve that selectively engages an inlet passage of the delivery valve manifold.24. The valve manifold as recited in further comprising a filter fluidly connected to the delivery valve manifold.25. The valve manifold as recited in ...

Maintenance Auxiliary Tool of Brake System

A maintenance auxiliary tool of brake system includes a main body, a locking module, a pneumatic module and a controller. The main body includes an outer rod, a support rod and an adjusting rod. The pneumatic module includes a pneumatic cylinder, a first airflow device, a second airflow device and an action rod. When the switch is operated to push a high pressure air into the pneumatic cylinder through the second airflow device, the action rod is pushed to drive the brake pedal toward. When the switch is operated to push a high pressure air into the pneumatic cylinder through the first airflow device, the action rod is pushed to drive the brake pedal backward. The replacement of the brake oil will be completed by repeating the above operation which drives the brake pedal to go backward and toward in a manner to expel air within an oil pipe. 1. A maintenance auxiliary tool of brake system comprising:a main body including an outer rod, a support rod and an adjusting rod, the outer rod provided with a first axial hole on its center axis and provided with a support frame at one end of the outer rod, a first adjusting member provided at one end of the support frame and longitudinally adjustable, a second adjusting member provided at the other end of the support frame and longitudinally adjustable, the first adjusting member and the second adjusting member arranged on the support frame and a transversely distance therebetween is adjustable, the outer rod longitudinally provided with a first cut slot and a second cut slot on its external circumference along its axial direction, one side of an external circumference of the support rod connected with the external circumference of the outer rod, the support rod longitudinally provided with a second axial hole on its center axis, the adjusting rod provided with a connection element at one end thereof and provided a ratchet element in a middle of an external circumference of the adjusting rod, the connection element provided ...

HYDRAULIC CONTROL BLOCK

A hydraulic control block includes a plurality of valve segments lying on top of one another. A control piston arranged in each valve segment is configured to control inflow of hydraulic oil from a pressure source to a load or discharge of hydraulic oil from a tank. Each control piston is hydraulically operable by at least one pilot valve and each pilot valve is electromagnetically operable. The hydraulic circuits formed in the valve segments are preloaded to a preload pressure corresponding to a respective ambient pressure. The pilot valves are arranged in a housing sealed off from surroundings. The housing interior is filled with hydraulic oil and is connected to the tank. The pilot valves assigned to each valve segment are attached directly to the valve segments, are arranged in their own housing sealed off from surroundings, and are connected to a tank line leading to the tank. 1. A hydraulic control block comprising:several valve segments lying on top of one another;a control piston arranged in each valve segment and configured to control an inflow of hydraulic oil from a pressure source to at least one load and/or a discharge of hydraulic oil from at least one load to at least one tank, each control piston configured to be operated hydraulically by at least one pilot valve, and each pilot valve configured to be operated by an electromagnet; andhydraulic circuits formed in the valve segments and including feeds to the at least one tank, feeds to the at least one load, the at least one tank and the at least one load, the hydraulic circuits being preloaded to a preload pressure corresponding to a respective ambient pressure,wherein the at least one pilot valve of each control piston is arranged in a respective housing that is sealed off with respect to surroundings, an interior of the respective housing being filled with hydraulic oil and connected to the at least one tank, andwherein the at least one pilot valve assigned to each valve segment is attached ...

Hydraulic Block for a Slip-Controlled Vehicle Brake System

A flat, box-shaped hydraulic block for the mechanical fastening and hydraulic interconnection of solenoid valves, pump elements, etc. of a slip-controlled vehicle brake system connects connections of installation spaces for the pump elements to connectors for a brake master cylinder and connections of receptacles for pressure build-up valves which run past one another via flat chambers on longitudinal sides of the hydraulic block and short blind bores. As a result, the receptacles of the pressure build-up valves are connected to the connectors for the brake master cylinder. The chambers damp pressure pulses of the pump elements of a piston pump. 1. A box-shaped hydraulic block for a slip-controlled vehicle brake system comprising:an upper side;an underside;two transverse sides;two longitudinal sides;a plurality of wheel brake connectors defined next to one another on one of the two transverse sides of the hydraulic block;a plurality of brake master cylinder connectors defined on the underside of the hydraulic block;a plurality of pressure build-up valve receptacles defined next to one another on the upper side of the hydraulic block;a plurality of installation spaces for pump elements of a piston pump;a plurality of pressure build-up valve receptacle connections; andone installation space connection between each brake master cylinder connector of the plurality of brake master cylinder connectors and a pressure side of a corresponding installation space of the plurality of installation spaces,wherein the wheel brake connectors are defined below the brake master cylinder connectors,wherein the installation space connections connect the brake master cylinder connectors and the installation spaces to a pressure build-up valve receptacle, andwherein the installation space connections extend through to an other transverse side of the two transverse sides of the hydraulic block opposite the one transverse side.2. The hydraulic block according to claim 1 , wherein:the ...

FACE MOUNT INTERFACE FOR AN ELECTRO-HYDRAULIC ACTUATOR

A hydraulic cylinder has a main body portion with a piston bore extending in a longitudinal direction of the main body portion from a first end to a second end of the main body portion. A first cylinder mounting bracket extends in the longitudinal direction and has at least one aperture disposed along the length of the bracket for locating and securing the hydraulic cylinder to a structure. A manifold mounting portion extends in the longitudinal direction of the main body portion and has a first fluid passageway extending in the longitudinal direction from the first end to the second end. Thus, a manifold can be mounted to the manifold mounting portion at one of a plurality of different positions and/or orientations along the length of the hydraulic cylinder while allowing fluid communication between a fluid port of the manifold and the fluid passageway of the manifold mounting portion. 1. A hydraulic cylinder comprising:a main body portion having a cylinder piston bore extending in a longitudinal direction of the main body portion from a first end to a second end of the main body portion;a first cylinder mounting bracket extending in the longitudinal direction and having at least one aperture disposed along the length of the bracket for locating and securing the hydraulic cylinder to a structure; anda manifold mounting portion extending in the longitudinal direction of the main body portion and having a first fluid passageway extending in the longitudinal direction from the first end to the second end,whereby a manifold can be mounted to the manifold mounting portion at one of a plurality of different positions and/or orientations along the length of the hydraulic cylinder while allowing fluid communication between a fluid port of the manifold and the fluid passageway of the manifold mounting portion.2. The hydraulic cylinder of wherein the manifold mounting portion further includes a fluid aperture selectively positioned along the length of the manifold mounting ...

Shaft sealing device and valve structure using the same

A shaft sealing device switches a sealing state and an unsealing state of a fluid, with high sealing performance maintained, because no abrasion accompanies movement of a sealing material or a sealing member, enabling feeding a fluid at a predetermined flow rate, and adjusts the expanding rate of the sealing material with the quantity of an external electric signal and accordingly adjusts the contact face pressure to enable controlling the amount of leakage of the fluid highly precisely, so that it can be used for all applications. The shaft sealing device includes a shaft sealing body formed of a macromolecular material and made expansible or contractible, or deformable, through external electrostimuli applied to a shaft sealing portion disposed in a device body, and flow passages disposed in the shaft sealing portion for feeding the fluid leaked due to the expansion or contraction, or the deformation, of the shaft sealing body.

METHOD AND A DEVICE FOR REDUCING VIBRATIONS IN A WORKING MACHINE

A method for reducing vibrations in a working machine is provided. The working machine includes a hydraulic system with a hydraulic machine for providing hydraulic fluid to at least one working function. The hydraulic machine is driven by a drive source haying a variable speed of rotation. The method includes identifying a resonance frequency for the working machine, and controlling the drive source so as to counteract waves with the resonance frequency. 1. A method for reducing vibrations in a working machine , the working machine comprising a hydraulic system with a hydraulic machine for providing hydraulic fluid to at least one working function , the hydraulic machine being driven by a drive source having a variable speed of rotation , comprisingidentifying a resonance frequency for the working machine, andcontrolling the drive source so as to counteract waves with the resonance frequency.2. A method according to claim 1 , comprising controlling the drive source by changing the speed of rotation of the drive source.3. A method according to claim 2 , comprising controlling the drive source by increasing the speed of rotation of the drive source.4. A method according to claim 2 , comprising controlling the drive source by decreasing the speed of rotation of the drive source.5. A method according to claim 2 , comprising compensating for the changed rotation of speed of the drive source by changing the displacement of the hydraulic machine so as to keep the hydraulic flow to the working function substantially unchanged.6. A method according to claim 3 , comprising compensating for the increased rotation of speed of the drive source by draining hydraulic fluid from the hydraulic machine to a hydraulic tank so as to keep the hydraulic flow to the working function substantially unchanged.7. A method according to claim 2 , comprising varying the speed of rotation of the drive source during one and the same rotation axis revolution of the drive source.8. A method ...

Slave Cylinder for a Vibration-Damped Hydraulic Force Transmission System, Particularly a Hydraulic Clutch Actuating System for Motor Vehicles

A slave cylinder for a vibration-damped hydraulic force transmission system, particularly a hydraulic clutch actuating system for motor vehicles is disclosed, comprising a cylinder housing, a piston received therein to be longitudinally displaceable and a pressure chamber which is bounded by the cylinder housing and the piston and which can be selectably acted on by a pressure medium, by way of a pressure connection provided in the cylinder housing, in order to displace the piston in the cylinder housing. An insert member which is inserted in the pressure chamber and secured in the pressure connection and which is equipped with a device for reducing pressure pulses, the device being constantly open to the pressure medium, is additionally provided. As a result, the vibration-damping measures or means are integrated in the slave cylinder in a particularly economic and space-saving manner.

ELECTRO HYDROSTATIC ACTUATORS

An electro hydrostatic actuator (EHA) comprises a hydraulic pump and an electric motor driving the hydraulic pump. The hydraulic pump comprises an inlet and an outlet for hydraulic fluid and an active fluid flow path arranged therebetween such that, in an active mode of operation when the pump is driven by the electric motor, hydraulic fluid is actively drawn in through the inlet and exhausted out through the outlet. The hydraulic pump further comprises a bypass flow path arranged between the pump inlet and outlet, such that, in a damping mode of operation, hydraulic fluid is able to freely flow between the inlet and outlet in either direction. 1. An electro hydrostatic actuator (EHA) comprising:electric motor; and an inlet and an outlet for hydraulic fluid and an active fluid flow path arranged therebetween such that, in an active mode of operation when the pump is driven by the electric motor, hydraulic fluid is actively drawn in through the inlet and exhausted out through the outlet; and', 'a bypass flow path arranged between the pump inlet and outlet, such that, in a damping mode of operation, hydraulic fluid is able to freely flow between the inlet and outlet in either direction;, 'a hydraulic pump driven by the electric motor, the hydraulic pump to supply hydraulic fluid to a hydraulic actuator, the hydraulic pump comprising 'a moveable member arranged to move within the motor such that, when the motor is energised so as to drive the pump in the active mode of operation, the member has a blocking position that acts to block the bypass flow path, and when the motor is not energised the member moves within the motor to open the bypass flow path in the damping mode of operation.', 'wherein the electric motor comprises2. An electro hydrostatic actuator according to claim 1 , wherein the moveable member is arranged to move axially within the motor to open the bypass flow path.3. An electro hydrostatic actuator according to claim 1 , wherein the member is moved ...

METHODS AND APPARATUS TO ENABLE BOOM BOUNCE REDUCTION AND PREVENT UN-COMMANDED MOTION IN HYDRAULIC SYSTEMS

A hydraulic system () and method for reducing boom dynamics of a boom (), while providing counter-balance valve protection, includes a hydraulic actuator (), first and second counter-balance valves (), first and second independent control valves (), and first and second blocking valves (). The actuator includes first and second corresponding chambers. In a first mode, the second counter-balance valve is opened by the first control valve, and the first counter-balance valve is opened by the second control valve. In a second mode, at least one of the counter-balance valves is closed. A meter-out control valve () may be operated in a flow control mode, and/or a meter-in control valve () may be operated in a pressure control mode. Boom dynamics reduction may occur while the boom is in motion (e.g., about a worksite). By opening the counter-balance valves, sensors at the control valves may be used to characterize external loads. The control valves may respond to the external loads and at least partially cancel unwanted boom dynamics. The system may further detecting faults in actuators with counter-balance valves and prevent any single point fault from causing a boom falling event and/or mitigate such faults. 142.-. (canceled)43. A method of controlling a hydraulic actuator hydraulically coupled to a pair of counter-balance valves , the method comprising:providing the hydraulic actuator, the hydraulic actuator including a pair of chambers hydraulically coupled to the pair of counter-balance valves;providing a pair of control valves hydraulically coupled to the pair of counter-balance valves;operating one of the pair of control valves in a pressure control mode;operating the other of the pair of control valves in a flow control mode;transferring hydraulic fluid flow with the pair of control valves to/from the hydraulic actuator via the pair of counter-balance valves; andsending a first control signal to one of the pair of control valves and a second control signal to the ...

TAMPING ASSEMBLY FOR A TRACK TAMPING MACHINE

A tamping assembly () for a track tamping machine is proposed comprising tamping tool pairs (), which are arranged on a girder () guided vertically adjustable in a tamping assembly frame and are formed as swing arms, and the lower tamping pick ends () of which intended for plunging into a ballast bed () are drivable using an oscillation drive and are hydraulically closable toward one another, wherein a hydraulic cylinder () and possibly a distance sensor () for determining the hydraulic cylinder position are associated with each of the tamping tools () of a tamping tool pair, and the hydraulic cylinders () form both the linear closing drive and also the oscillation drive of the tamping tools (), and wherein electrohydraulic valves () are provided for actuation of the hydraulic cylinders (), which comprise a mechanical hydraulic cylinder actuation valve part () and an associated valve electronic unit (). To provide advantageous construction conditions, it is proposed that the valve electronic unit () is mounted in a vibration-damped manner by means of vibration dampers (D) with respect to the hydraulic cylinder () and/or the mechanical hydraulic cylinder actuation valve part (). 1. A tamping assembly for a track tamping machine , said tamping assembly comprising:tamping tool pairs of tamping tools arranged on a girder that is guided so as to be vertically adjustable in a tamping assembly frame and formed as swing arms; andthe tamping tool pairs having lower tamping pick ends configured to be plunged into a ballast bed drivable using an oscillation drive and hydraulically closable toward one another;wherein a hydraulic cylinder associated with each of the tamping tools of a tamping tool pair, and the hydraulic cylinders form both a linear closing drive hydraulically closing the tamping pick ends toward one another and also an oscillation drive driving the tamping tools; andwherein electrohydraulic valves are actuate the hydraulic cylinders, wherein the ...

Sealing High Pressure Flow Devices

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure. 1. A fluid end assembly , comprising:a housing having a first conduit extending therethrough, and a second conduit extending therethrough that intersects the first conduit;an endless groove formed in the housing such that the groove surrounds the second conduit;a seal positioned within the groove;a tubular sleeve installed within the second conduit such that at least a portion of the sleeve engages with the seal; anda reciprocating plunger disposed at least partially within the sleeve.2. The fluid end assembly of claim 1 , further comprising:a closure element installed within the first conduit.3. The fluid end assembly of in which the closure element is a plug sized to fully block fluid flow within the first conduit.4. The fluid end assembly of in which the first conduit is orthogonal to the second conduit.5. The fluid end assembly of in which the groove is characterized by a pair of parallel side walls joined by a base.6. The fluid end assembly of in which the groove opens towards a centerline of the second conduit.7. The fluid end assembly of in which at least a portion of the housing is configured to contain a fluid having a pressure of at least 8 claim 1 ,000 pounds per square inch.8. The fluid end assembly of in which the plunger is configured to engage with an engine having a power output of at least 2 claim 1 ,250 horsepower.9. The fluid end assembly of in which the endless groove is characterized as the first groove claim 1 , and further comprising:a second endless groove formed in the housing such that the second groove surrounds the first conduit.10. The fluid end ...

Hydraulic Control Valve, Dual-Cylinder Extension System and Aerial Work Engineering Machine

A hydraulic control valve, a dual-cylinder extension system and an aerial work engineering machine. The control valve comprises a flow distributing and collecting valve, and control valve body is provided with a first oil opening, a second oil opening and a third oil opening. A first oil opening, a second oil opening and a third oil opening of said flow distributing and collecting valve are respectively communicated with the first oil opening, the second oil opening and the third oil opening of the valve body. The control valve has two working states, wherein, in the first working state, the oil path between the second oil opening and the third oil opening of the valve body is blocked; and in the second working state, the oil path between the second oil opening and the third oil opening of the valve body is opened.

MOBILE HYDRAULIC GENERATOR AND CONTROL METHOD THEREOF

Disclosed are a mobile hydraulic generator having rapid response by scattering a small motor for generating a flow of fluid and a small pump, and a control method thereof. The mobile hydraulic generator includes: a flow generator including n pumps operated by n motors to generate an amount of a hydraulic fluid; a proportional hydraulic control valve to control output hydraulic pressure according to the amount of the hydraulic fluid; a pressure sensor to detect the output hydraulic pressure; and a hydraulic servo loop controller to which required hydraulic pressure and required amount of fluid are input by a user, to which feedback the output hydraulic pressure, to generate a pressure control signal for controlling the proportional hydraulic control valve based on the required hydraulic pressure and a change amount of the output hydraulic pressure and to generate an RPM input signal for controlling RPM of the n motors. 1. A mobile hydraulic generator comprising:a flow generator including n pumps operated by n motors to generate an amount of a hydraulic fluid;a proportional hydraulic control valve to control output hydraulic pressure according to the amount of the hydraulic fluid;a pressure sensor to detect the output hydraulic pressure; and a hydraulic servo loop controller to generate a pressure control signal for controlling the proportional hydraulic control valve based on a required hydraulic pressure and a change amount of the output hydraulic pressure and to generate an RPM input signal for controlling RPM of the n motors, respectively,wherein the required hydraulic pressure and a required amount of fluid are input by a user, and the output hydraulic pressure is feedbacked to the hydraulic servo loop controller.2. The mobile hydraulic generator of claim 1 , wherein the pressure control signal is calculated by combining feedforward calculation which is based on the required hydraulic pressure and proportional calculation claim 1 , integral calculation claim 1 , ...

Sealing High Pressure Flow Devices

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure. 1. A fluid end assembly , comprising:a housing having an external surface and an internal chamber;a first conduit formed in the housing and having first and second sections, each section independently interconnecting the internal chamber and the external surface;a second conduit formed in the housing, intersecting the first conduit and independently interconnecting the internal chamber and the external surface; andan endless groove formed in the wall or walls defining one of the conduits and extending concentrically around that conduit.2. The fluid end assembly of in which the first conduit is orthogonal to the second conduit.3. The fluid end assembly of in which the first and second sections are aligned and situated on opposite sides of the internal chamber.4. The fluid end assembly of in which the second conduit has aligned third and fourth sections situated on opposite sides of the internal chamber.5. The fluid end assembly of further comprising a closure claim 1 , element that is installed within one of the conduits.6. The fluid end assembly of further comprising a sealing element interposed between the closure element and the wall or walls of the conduit the closure element is installed within claim 5 , in which the sealing element is not closely received within a groove formed in the closure element.7. The fluid end assembly of in which the closure element is a plug sized to fully block fluid flow within the conduit it is installed within.8. The fluid end assembly of in which the plug is installed within the first conduit.9. The fluid end assembly of in which the closure ...

Vortex Diffuser for Rotating/Stationary Interfaces

In hydraulic systems having rotating-stationary component interfaces, a bore pressure regulating mechanism is provided to interact with the hydraulic fluid in a control volume to maintain a hydraulic fluid pressure in a longitudinal shaft bore at or approximately equal to a supply pressure when a gear shaft rotates within the control volume. In one aspect, the bore pressure regulating mechanism minimizes vortex flow of the hydraulic fluid induced by the rotation of the gear shaft. In another aspect, the bore pressure regulating mechanism provides a direct feed of pressurized hydraulic fluid proximate an opening of the longitudinal shaft bore through an end surface of the gear shaft, and thereby minimizes the opportunity for the hydraulic fluid to be forced into vortex flow by the gear shaft in the area of the longitudinal shaft bore.

ACTUATOR FOR USE IN AIRCRAFT

There is provided an actuator for an aircraft thrust reverser, comprising a first member, a second member movable relative to the first member, a third member movable relative to the first member and the second member, and a lock system configured to selectively lock the second member to the third member in a first stage of actuation, and the first member to the second member in a second, separate stage of actuation. 1. An actuator for an aircraft thrust reverser , comprising:a first member;a second member movable relative to the first member;a third member movable relative to the first member and the second member; anda lock system configured to selectively lock the second member to the third member in a first stage of actuation, and the first member to the second member in a second, separate stage of actuation.2. An actuator as claimed in claim 1 , wherein in the first stage of actuation the second member and the third member are locked together by the lock system claim 1 , such that the second member and the third member are able to move relative to the first member.3. An actuator as claimed in claim 1 , wherein in the second stage of actuation the first member and the second member are locked together by the lock system claim 1 , and the second member is released from the third member claim 1 , such that the third member is able to move relative to the first member and the second member.4. An actuator as claimed in claim 1 , wherein relative movement of the second member and/or the third member with respect to the first member in the first stage of actuation increases the energy within a stored energy device.5. An actuator as claimed in claim 4 , wherein the stored energy device is configured to exert a force on the second member and the third member claim 4 , wherein the force exerted by the stored energy device is dependent on the position of the second member and/or the third member with respect to the first member during the first and second stages of ...

HIGH-PRESSURE HOSE VIBRATION SUPPRESSOR

A vibration suppressor is disclosed that is configured for use in a system having a hose under pulsating hydraulic pressure. The pulsating hydraulic pressure causes vibration of the hose at the pulsation frequency. The vibration suppressor is applied to the hose and is constructed to have a resonant frequency slightly below the pulsation frequency where the pulsating hydraulic pressure is at a peak level, due to, but not limited to, the existence of a resonance in the hydraulic system. 1. A vibration suppressor configured for use in a system having a hose under pulsating hydraulic pressure at a pulsation frequency , wherein the pulsating hydraulic pressure causes vibration of the hose at the pulsation frequency , the vibration suppressor comprising:a suppressor mass;a resilient member configured to extend radially between an exterior surface of the hose and the suppressor mass; andwherein the suppressor mass and resilient member form a mechanical system having a resonant frequency slightly below the pulsation frequency.2. The vibration suppressor of claim 1 , wherein the suppressor mass comprises a metal sleeve.3. The vibration suppressor of claim 1 , wherein the resilient member comprises an elastomer.4. The vibration suppressor of claim 2 , wherein the resilient member comprises a first portion configured to deform radially between a first portion of the exterior surface of the hose and the suppressor mass claim 2 , and a second portion claim 2 , opposite the first portion claim 2 , configured to deform radially between and contact the exterior surface of the hose and the suppressor mass.5. The vibration suppressor of claim 1 , wherein the pulsation frequency differs from a structural resonant frequency of the hose.6. The vibration suppressor of claim 1 , wherein the suppressor mass and the resilient member form a single-degree-of-freedom system to suppress vibration of the hose in a lateral direction.7. A method for use in a system having a hose under pulsating ...

Hydraulic Work Machine

A hydraulic work machine is provided in which left and right hydraulic motors are driven independently of each other by two hydraulic pumps and in which an anomaly of any of the left and right track devices can be detected with high accuracy. The hydraulic work machine includes a first pressure sensor configured to detect a first pump pressure that is a delivery pressure of a first hydraulic pump and a second pressure sensor configured to detect a second pump pressure that is a delivery pressure of a second hydraulic pump When a controller decides, from detection results of a travel operation detector and work operation detectors and that a work implement is not operated but travel operation devices and are operated and besides left and right track devices and are straightly traveling, the controller calculates an anomaly decision evaluation value based on a pressure difference value obtained by subtracting one from the other of the first pump pressure and the second pump pressure and decides, based on a result of comparison between the anomaly decision evaluation value and a predetermined decision reference value that one of the left and right track devices has an anomaly. 1. A hydraulic work machine , comprising:a first hydraulic pump and a second hydraulic pump of variable displacement type;a left track device including a left track hydraulic motor driven by hydraulic fluid supplied from the first hydraulic pump;a right track device including a right track hydraulic motor driven by hydraulic fluid supplied from the second hydraulic pump;a hydraulic actuator driven by hydraulic fluid supplied from at least one of the first hydraulic pump and the second hydraulic pump;a work implement driven by the hydraulic actuator;a travel operation device for operating the left track device and the right track device;a work operation device for operating the work implement;a controller that controls pump displacements of the first hydraulic pump and the second hydraulic pump in ...

Predictively Adjustable Hydraulic Pressure Rails

A robotic device may traverse a path in a direction of locomotion. Sensor data indicative of one or more physical features of the environment in the direction of locomotion may be received. The implementation may further involve determining that traversing the path involves traversing the one or more physical features of the environment. Based on the sensor data indicative of the one or more physical features of the environment in the direction of locomotion, a hydraulic pressure to supply to the one or more hydraulic actuators to traverse the one or more physical features of the environment may be predicted. Before traversing the one or more physical features of the environment, the hydraulic drive system may adjust pressure of supplied hydraulic fluid from the first pressure to the predicted hydraulic pressure. 1. A robotic device comprising:at least one sensor configured to generate data indicative of an environment in which the robotic device is operating; a first pressure rail,', 'a second pressure rail, and', 'a hydraulic pump complex configured to provide pressurized hydraulic fluid at a fixed pressure to the first pressure rail and pressurized hydraulic fluid at an adjustable pressure to the second pressure rail;, 'a hydraulic drive system comprisinga control system configured to vary the adjustable pressure provided by the hydraulic pump complex based on at least the data indicative of the environment in which the robotic device is operating; and hydraulic fluid inputs, wherein the hydraulic fluid inputs comprise a first hydraulic fluid input coupled to the first pressure rail and a second hydraulic fluid input coupled to the second pressure rail,', 'a hydraulic fluid output, and', 'a hydraulic fluid switch that selectively connects one of the hydraulic fluid inputs to the hydraulic fluid output., 'a switch valve complex comprising2. The robotic device of claim 1 , further comprising:a locomotion complex that moves the robotic device in a direction of ...

Loop-flushing-system for hydrostatic apparatus

A hydraulic loop-flushing device ( 50 ) for a hydrostatic apparatus ( 1 ) comprising a valve housing ( 8 ) having a cylindrical valve bore ( 9 ) with a high pressure inlet ( 5 or 6 ), a low pressure inlet ( 6 or 5 ) and a discharge outlet ( 7 ). A first flushing valve spool ( 12 ) is arranged elastically pre-stressed within the valve bore ( 9 ) for enabling a fluid connection between the low pressure inlet ( 6 or 5 ) and the discharge outlet ( 7 ) by means of a first fluid channel ( 16 ). Further, a shuttle valve spool ( 22 ) is arranged elastically pre-stressed within the valve bore ( 9 ) for further enabling the fluid connection between the low pressure inlet ( 6 or 5 ) and the discharge outlet ( 7 ) by means of a fluid passageway ( 29 ). The first flushing valve spool ( 12 ) is moveable into an open position, in which the first fluid channel ( 16 ) is open, if the fluid pressure at the low pressure inlet ( 6 or 5 ) exceeds a first threshold value, and the shuttle valve spool ( 22 ) is moveable into an open position, in which the fluid passageway ( 29 ) is open for connecting the low pressure inlet ( 6 or 5 ) with the discharge outlet ( 7 ), if the pressure difference between the high pressure inlet ( 5 or 6 ) and the low pressure inlet ( 6 or 5 ) exceeds a second threshold value. For this the first flushing valve spool ( 12 ) and the shuttle valve spool ( 22 ) are arranged concentrically and moveable relative to each other, and the fluid connection between the low pressure inlet ( 6 or 5 ) and the discharge outlet ( 7 ) is enabled only, if both the first flushing valve spool ( 12 ) and the shuttle valve spool ( 22 ) are in the respective open positions.

SYSTEM FOR CONTROLLING THE OPERATION OF AN ACTUATOR MOUNTED ON A SEED PLANTING IMPLEMENT

In one aspect, a system for controlling an operation of an actuator mounted on a seed planting implement may include an actuator configured to adjust a position of a row unit of the seed planting implement relative to a toolbar of the seed planting implement. The system may also include a flow restrictor fluidly coupled to a fluid chamber of the actuator, with the flow restrictor being configured to reduce a rate at which fluid is permitted to exit the fluid chamber in a manner that provides damping to the row unit. Furthermore, the system may include a valve fluidly coupled to the flow restrictor in a parallel relationship such that the valve is configured to permit the fluid exiting the fluid chamber to flow through the flow restrictor and the fluid entering the fluid chamber to bypass the flow restrictor. 1. A system for controlling an operation of an actuator mounted on a seed planting implement , the system comprising:a toolbar;a row unit adjustably mounted on the toolbar;a fluid-driven actuator configured to adjust a position of the row unit relative to the toolbar, the fluid-driven actuator defining first and second fluid chambers;a flow restrictor fluidly coupled to the first fluid chamber, the flow restrictor being configured to reduce a rate at which fluid is permitted to exit the first fluid chamber in a manner that provides damping to the row unit; anda valve fluidly coupled to the first fluid chamber, the valve further being fluidly coupled to the flow restrictor in a parallel relationship such that the valve is configured to permit the fluid exiting the first fluid chamber to flow through the flow restrictor and the fluid entering the first fluid chamber to bypass the flow restrictor.2. The system of claim 1 , wherein claim 1 , when fluid is supplied to the second fluid chamber claim 1 , the valve is configured to permit fluid exiting the first fluid chamber to bypass the flow restrictor.3. The system of claim 1 , wherein the valve is fluidly actuated. ...

DAMPING DEVICE

A damping device for fluids subject to pressure pulsations, having at least one hydraulic accumulator (), the accumulator housing () of which contains a movable separating element (), which separates a gas side () from a fluid room () and can be pressurized by a fluid present in the fluid room (), is characterized in that a damper housing () having a second fluid room () is provided as a component of the accumulator housing (), wherein through said second fluid room () the fluid subject to pressure pulsations can flow and the second fluid room () contains a second movable separating element (), which separates the second fluid room () from the first fluid room () of the hydraulic accumulator () without dead space. 12461814161634384638384038162. A damping device for fluids subject to pressure pulsations , having at least one hydraulic accumulator () , the accumulator housing ( , ) of which contains a movable separating element () , which separates a gas side () from a fluid room () and can be pressurized by a fluid present in the fluid room () , characterized in that a damper housing () having a second fluid room () is provided as a component of the accumulator housing ( , ) , wherein through said second fluid room () the fluid subject to pressure pulsations can flow and the second fluid room () contains a second movable separating element () , which separates the second fluid room () from the first fluid room () of the hydraulic accumulator () without dead space.23446. The damping device according to claim 1 , characterized in that the damper housing () is detachably attached to the accumulator housing ( claim 1 , ).31640. The damping device according to claim 1 , characterized in that a chemically neutral separating liquid is inserted in the first fluid room () claim 1 , wherein said separating liquid does not cause contamination of the fluid system to be damped in the event of failure of the second separating element ().41840. The damping device according to claim ...

Hybrid construction machine

A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branched off, first and second logic valves, a switching valve disposed in the other branch passage and switchable to a state where the assist pump is connected to the second supply passage on the upstream side of the second logic valve and a state where the second main pump is connected to the hydraulic motor, and a check valve. A poppet diameter of the first logic valve is smaller than that of the second logic valve.

HYDRAULIC DEVICE

A hydraulic device includes a hydraulic pump , a tool , an oil passage for sending the pressure oil generated by the hydraulic pump to the tool and returning return oil from the tool to the hydraulic pump , a handle configured to be held by one hand of a worker, a switching part disposed at the oil passage and configured to switch a path for at least one of the pressure oil and the return oil, and an operation part for operating the switching part . The operation part is disposed at a position that allows the operation part to be operated with the hand of the worker holding the handle , or with a finger of the hand holding the handle 1. A hydraulic device comprising:a hydraulic pump configured to generate pressure oil;a tool configured to operate by the pressure oil generated by the hydraulic pump;an oil passage for sending the pressure oil generated by the hydraulic pump to the tool and returning return oil from the tool to the hydraulic pump;a handle configured to be held by one hand of a worker;a switching part disposed at the oil passage and configured to switch a path for at least one of the pressure oil and the return oil; andan operation part for operating the switching part, whereinthe operation part is disposed at a position that allows the operation part to be operated with the hand of the worker holding the handle, or with a finger of the hand holding the handle.2. The hydraulic device according to claim 1 , wherein a distance between the handle and the operation part in a longitudinal direction of the hydraulic device falls within a range of 0 mm to 50 mm.3. The hydraulic device according to claim 2 , wherein the distance between the handle and the operation part in the longitudinal direction of the hydraulic device falls within a range of 5 mm to 50 mm.4. The hydraulic device according to claim 3 , wherein the distance between the handle and the operation part in the longitudinal direction of the hydraulic device falls within a range of 9 mm to 45 mm.5. ...

Pilot control mechanism for boom bounce reduction

A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

Pressure control for hydraulically actuated agricultural headers

A pressure control system is described for a vehicle having a hydraulically actuated header. The system may include a hydraulic lifting circuit for raising and lowering the header, a hydraulic float circuit for floating the header, and a drain tank. A lifting circuit control valve may be configured to control drainage of hydraulic fluid from the hydraulic lifting circuit to the drain tank. A float circuit control valve may be configured to control drainage of hydraulic fluid from the hydraulic float circuit to the drain tank. A user interface may be configured to receive one or more inputs to control drainage of hydraulic fluid from the hydraulic circuits. Based upon the one or more inputs, at least one of the control valves may be opened, in order to depressurize, respectively, one of the hydraulic circuits.

Die cushion device

There is provided a die cushion device that includes a cushion pad, a hydraulic cylinder configured to lift the cushion pad, and a hydraulic closed circuit connected to a die cushion pressure creation chamber of the hydraulic cylinder. The hydraulic closed circuit includes a pilot drive type logic valve that is operable as a main relief valve at the time of the die cushion operation, and a pilot relief valve configured to create pilot pressure for controlling the logic valve. Hydraulic oil is filled in the hydraulic closed circuit, in a pressurized manner, and the hydraulic oil in the hydraulic closed circuit is pressurized by only die cushion force applied from the cushion pad through the hydraulic cylinder, in one cycle period of the cushion pad.

HYBRID WORKING MACHINE

Pressure sensors are provided to detect the delivery pressure of a hydraulic pump, the output pressure of an engine revolution speed detecting valve, and the output pressure of a differential pressure reducing valve generating the differential pressure between the delivery pressure of the hydraulic pump and a maximum load pressure. A vehicle controller calculates virtually the displacement of the hydraulic pump by use of the detected pressures and an equation of motion about a swash plate of the hydraulic pump, calculates the power need of the hydraulic pump and the output of the engine using these values, and switches a motor between powering and generation control in accordance with the result of a comparison between the pump power need and the engine output. In this manner, the displacement of the hydraulic pump without using sensors to detect the tilting angle of the swash plate of the hydraulic pump. 1. A hybrid working machine comprising:an engine;a hydraulic pump driven by the engine;a motor which drives the hydraulic pump in combination with the engine;a plurality of actuators driven by hydraulic fluid delivered by the hydraulic pump;a pump control system including a torque control unit which performs control to reduce a displacement of the hydraulic pump when a delivery pressure of the hydraulic pump is being raised, so that absorption torque of the hydraulic pump will not exceed predetermined maximum torque, and a load sensing control unit which controls the displacement of the hydraulic pump in such a manner that the delivery pressure of the hydraulic pump becomes higher than a maximum load pressure of the plurality of actuators just by a target differential pressure;a plurality of pressure sensors including a first pressure sensor which detects the delivery pressure of the hydraulic pump, and a second pressure sensor which detects a pressure related to the differential pressure between the delivery pressure of the hydraulic pump and the maximum load ...

Dynaco Stepper Pump Hydraulic System

A hydraulic linear actuator system known as the “Dynaco Stepper Pump Hydraulics System” is which is an electrically driven hydraulic pump system made of durable materials for use in an electronically controllable hydraulic system comprised of: (a) an electrically driven stepper motor; (b) a hydraulic pump to pressurize a hydraulic fluid; (c) a means to connect the stepper motor to the hydraulic pump; (d) a pressurized reservoir for a quantity of hydraulic fluid; (e) a means to supply pressurized fluid to a hydraulic actuator; (f) the hydraulic actuator with a means to provide linear motion to an object; (g) the means to provide linear motion to an object; (h) a means to return lowered pressurized fluid to the reservoir. An alternative embodiment is further comprised of a controller with a series of feedback signals.

DRIVE CONTROL DEVICE FOR CONSTRUCTION EQUIPMENT AND CONTROL METHOD THEREFOR

Disclosed is a drive control device for the construction equipment capable of reducing shock generation and smoothly operating a work device when the work device is operated during the driving, which comprises; a first and second hydraulic pumps and a pilot pump, a first work device and a first drive motor operated by a hydraulic oil of the first hydraulic pump, a second work device and a second drive motor operated by a hydraulic oil of the second hydraulic pump, a first drive control valve and a first work device control valve that are provided on the supply path of the first hydraulic pump, a second drive control valve and a second work device control valve that are provided on the supply path of the second hydraulic pump, a linear drive control valve that is provided at the upper side of the supply path of the second hydraulic pump, a parallel path having an inlet branched and connected to the upper side of the supply path of the second hydraulic pump and an outlet connected to the inlet port of the second work device control valve, a branch path having an inlet branched and connected to a predetermined position of the parallel path and an outlet branched and connected to a path between the linear drive control valve and the second drive control valve, a fixed orifice provided on the branch path, and a first ratio control valve provided on a path between the pilot pump and the linear drive control valve. 1. A drive control device for the construction equipment comprising;a first and second hydraulic pumps and a pilot pump,a first work device and a first drive motor operated by a hydraulic oil of the first hydraulic pump,a second work device and a second drive motor operated by a hydraulic oil of the second hydraulic pump,a first drive control valve and a first work device control valve that are provided on the supply path of the first hydraulic pump, and in switching, control the amount and flow direction of a hydraulic oil which is fed to the first drive motor ...

Valve Actuating System

In a valve actuating system having an actuating drive which has a drive housing and an output unit which is movably mounted in the drive housing for generating a stroke of a spindle of a valve for opening or closing a through-flow opening of the valve, wherein the output unit has a force pickup portion to which the spindle is coupleable or coupled and a fastening portion arranged opposite the force pickup portion, wherein the actuating drive furthermore possesses a holder, which is separate from the output unit, has a holder longitudinal-axis and has a fastening device by way of which it is fastened to the fastening portion of the output unit and a support device for supporting at least one position information element on the holder, and wherein the valve actuating system has a plurality of mutually different types of position information elements supported on the holder by way of the support device.

AUXILIARY POWER UNIT FOR MOBILE SERVICE VEHICLE

An auxiliary power unit system for mobile service vehicles is provided that can provide DC power to DC-powered equipment. The system attaches to the power take-off port of the transmission and can provide power to the DC-powered equipment without idling the engine of the mobile service vehicle, thereby reducing fossil fuel consumption and engine exhaust emissions. 1. An auxiliary power unit system for operating hydraulically-operated equipment , the system configured to be disposed in or on a mobile service vehicle comprising an internal combustion engine operatively coupled to a transmission and at least one alternator operatively coupled to the engine , the transmission comprising a power take-off (“PTO”) port , the system comprising:a) a first hydraulic pump operatively coupled to the PTO port;b) a hydraulic motor/pump operatively coupled to the first hydraulic pump via a control block/valve, the control block/valve configured to operatively couple to the hydraulically-operated equipment;c) a direct current (“DC”) electric motor/generator operatively coupled to the hydraulic motor/pump via a first clutch; andd) at least one battery operatively coupled to the DC electric motor/generator via one or both of a charger control circuit and a motor control circuit, wherein the charger control circuit is operatively coupled to the at least one alternator.2. The system as set forth in claim 1 , wherein the first clutch comprises one of a one-way free-wheeling clutch claim 1 , an electrically-operated clutch and a centrifugal clutch.3. The system as set forth in claim 1 , further comprising one or both of an air conditioning compressor and a second hydraulic pump operatively coupled to the DC electric motor/generator.4. The system as set forth in claim 1 , wherein the charger control circuit is configured to operatively couple with the at least one alternator.5. The system as set forth in claim 1 , further comprising an alternating current (“AC”) inverter operatively ...

ELECTROPNEUMATIC VALVE ASSEMBLY

An electropneumatic valve assembly comprises an electropneumatic pilot stage and a pneumatic power stage which is actuated by the pilot stage. Each pilot valve switches at least two power valves, and the valve assembly has a housing with an electrical signal input, with a compressed-air port, at least one vent port and at least one working outlet. The housing is layered with a pilot stage housing and a power stage housing connected along a substantially planar parting surface. At least one sealing element is between the pilot stage housing and power stage housing surrounding a control pressure region between the pilot stage housing and power stage housing. The control pressure region has two actuation regions for two power valves and has a duct-like connection with a defined flow cross section between the two actuation regions. An outlet of the associated pilot valve opens into the control pressure region. 1142. An electropneumatic valve group () , especially for actuation of a pneumatic working element () , comprising:{'b': 1', '2, 'an electropneumatic pilot stage with at least one pilot valve (P, P) and'}{'b': 1', '1', '2', '2, 'i': a', 'b', 'a', 'b, 'a pneumatic power stage, activated by the pilot stage, with at least two power valves (L, L, L, L),'}{'b': 1', '2', '1', '1', '2', '2', '1', '2, 'i': a', 'b', 'a', 'b, 'wherein each pilot valve (P, P) switches at least two power valves (L, L; L, L) coupled pneumatically with the pilot valve (P, P) and'}{'b': 1', '2', '7', '18', '20', '19', '21, 'wherein the valve group () is provided with a housing () having an electrical signal input (), a compressed-air port (), at least one vent port () and at least one working outlet (, ),'}{'b': 2', '3', '4, 'wherein the housing () has layered structure with at least one pilot-stage housing () and at least one power-stage housing () connected thereto along a substantially plane separating face (T),'}{'b': 1', '2', '1', '2', '3', '4', '3', '4', '1', '2', '1', '1', '2', '2', '1', ...

VIBRATION DAMPING SYSTEM BY MEANS OF A HYDRAULIC ACTUATION SYSTEM

A vibration damping system by means of a hydraulic actuation system, in particular for rolling mills, comprising at least one hydraulic actuator () having a movable part () and a corresponding hydraulic feeding circuit (), and hydraulic damping means () for a vibrating force acting on the movable part () of the hydraulic actuator (); the damping means () being connected to the hydraulic circuit () to actuate a damping of the vibrating force, wherein that the damping means () comprise a double chamber cylinder () having a first chamber () hydraulically connected to the hydraulic circuit (), and a movable part () connected to an electric damping part (), with the first chamber () hydraulically connected to and communicating with the second chamber () of the double chamber cylinder () by means of a calibrated pipe (). 2. A damping system according to claim 1 , wherein the pressure wave propagation towards the second chamber is allowed/inhibited in relation to a critical frequency of the calibrated pipe.3. A damping system according to claim 1 , wherein said first chamber has a smaller volume than a volume of said second chamber.4. A system according to claim 3 , wherein a ratio between the volume of said first chamber and the volume of said second chamber is at least 10.5. A damping system according to claim 1 , wherein said movable part comprises a first face projecting into the first chamber and a second face projecting into the second chamber claim 1 , and wherein the surface of said first face is larger than the surface of the second face.6. A damping system according to claim 1 , wherein said electric damping part is arranged inside one of the two chambers.7. A damping system according to claim 1 , wherein said electric damping system is of the passive magnetic-electric type.10. A damping system according to claim 9 , wherein said electric damping part comprises a piezoelectric actuator claim 9 , and wherein said difference of the surfaces is adapted to define a ...

Hydraulic equipment for excavators and operating machines in general

Hydraulic equipment of the type that can be fixed to a moving arm of an operating machine. The equipment has a support structure connected or connectable to a moving arm of an operating machine, at least one hydraulic motor for the rotation of a working element, a feed pipe connected or connectable to a hydraulic circuit of the supporting operating machine to supply a flow of working fluid to the hydraulic motor, and a drainage unit for the drainage of working fluid from the hydraulic motor. The equipment may optionally include a pressure detector in the drainage unit and a shut-off valve operationally associated with the pressure detector in such a way as to interrupt the flow of working fluid to the hydraulic motor when predetermined pressure conditions are detected.

DAMPING DEVICE

A damping device, in particular for damping or avoiding pressure surges, such as pulses, in hydraulic supply circuits, preferably in the form of a silencer, having a damping housing () which surrounds a damping chamber and has at least one fluid inlet () and at least one fluid outlet () and a fluid receiving chamber which extends between the fluid inlet () and the fluid outlet (), wherein, during operation of the device, a fluid flow crosses the damping chamber in a throughflow direction (), coming from the fluid inlet () in the direction of the fluid outlet (), and wherein at least parts of the fluid receiving chamber extend in at least one extent direction transversely with respect to the throughflow direction (), is characterized in that more than one fluid receiving chamber is arranged one after the other in the throughflow direction () and in that the fluid receiving chamber which is first upstream and the fluid receiving chamber which is last downstream immediately adjoin the fluid inlet () and the fluid outlet (), respectively. 111719354117193541171911354117191117191117193541. A damping device , in particular for damping or avoiding pressure surges , such as pulsations , in hydraulic supply circuits , preferably in the form of a silencer , having a damping housing () which surrounds a damping chamber ( ,) and has at least one fluid inlet () and at least one fluid outlet () and a fluid receiving chamber ( , ) which extends between the fluid inlet () and the fluid outlet () , wherein , during operation of the device , a fluid flow crosses the damping chamber ( , ) in a throughflow direction () , coming from the fluid inlet () in the direction of the fluid outlet () , and wherein at least parts of the fluid receiving chamber ( , ) extend in at least one extension direction transversely with respect to the throughflow direction () , characterized in that more than one fluid receiving chamber ( , ) is arranged one after the other in the throughflow direction () ...

Hydraulic control device

In a hydraulic control device, when it is detected that a pressure of first oil (output pressure) detected by an output pressure sensor pulsates, a transmission control unit as a TCU stops driving of a second pump or decreases a rotation number of the second pump as a first operation. Alternatively, when it is detected that the output pressure pulsates, the TCU increases the rotation number of the second pump to a rotation number (for example, maximum rotation number) that is higher than a target rotation number as a second operation.

HYDRAULIC SYSTEM WITH SUPPRESSOR UNIT

A hydraulic system with a suppressor unit is provided. The hydraulic system includes a reservoir and a hydraulic pump. The hydraulic pump supplies the fluid at a predefined pressure. The hydraulic system includes a hydraulic actuator connected to the hydraulic pump. The hydraulic system also includes a suppressor unit disposed between the hydraulic pump and the hydraulic actuator. The suppressor includes a housing member and a resilient member. The housing member includes a wall member having an inner wall surface and an outer wall surface. The resilient member is disposed within the wall member. The resilient member includes a body having an inner surface and an outer surface. The inner surface defines a passage for fluid flow therethrough. The outer surface includes at least one protrusion having an end surface. The end surface abuts to the inner wall surface of the housing member. 1a reservoir for storing a fluid;a hydraulic pump in communication with the reservoir, the hydraulic pump configured to supply the fluid at a predefined pressure;a hydraulic actuator configured to communicate with the hydraulic pump to receive the fluid at the predefined pressure, wherein the hydraulic pump is connected to the hydraulic actuator through a fluid duct; and [ a wall member defining an inner wall surface and an outer wall surface distal to the inner wall surface;', 'a first end member and a second end member spaced apart from the first end member, the first end member and the second end member disposed adjacent to a first end and a second end of the wall member, respectively; and', 'an inlet port and an outlet port defined adjacent to the first end and the second end, respectively, wherein the inlet port is communicated with the hydraulic pump and the outlet port is communicated with the hydraulic actuator; and, 'a housing member comprising, a body having an inner surface defining a passage for receiving the pressurized fluid therethrough and an outer surface facing the ...

Control System For Flushing Contaminated Hydraulic Fluid

The present inventors have recognized that contaminants in hydraulic fluid in a hydraulic system of an off-highway implement can be efficiently filtered by a filtration system of the source of hydraulic power by conducting an operation which controls existing valves for precisely operating cylinders of the system to return the fluid to the source of hydraulic power through a connector with little or no fluid going through cylinders. Such an operation can be advantageously executed immediately following connection of the source of hydraulic power to the manifold of the implement.

Valve System For Flushing Contaminated Hydraulic Fluid

The present inventors have recognized that contaminants in hydraulic fluid in a hydraulic system of an off-highway implement can be efficiently filtered by a filtration system of the source of hydraulic power by conducting an operation which controls existing valves of the system to block the fluid from going through such valves or precisely operated cylinders controlled by such valves while a dedicated return valve returns the fluid to the source of hydraulic power through a connector. Such an operation can be advantageously executed immediately following connection of the source of hydraulic power to the manifold of the implement. 1. An off-highway implement , comprising:a frame supported by a plurality of wheels;a set of ground engaging tools supported by the frame, the set of ground engaging tools including a hydraulic cylinder arranged with respect to the frame for raising and lowering the set of ground engaging tools, the hydraulic cylinder comprising a base, a base port, a rod and a rod port, wherein the rod is configured to extend from the base when hydraulic fluid is supplied to the base port and returned from the rod port, and wherein the rod is configured to retract toward the base when hydraulic fluid is supplied to the rod port and returned from the base port;a connector configured to supply hydraulic fluid in a supply line and return hydraulic fluid in a return line when connected to a hydraulic power source;a plurality of electronically controlled valves, the plurality of valves including a first valve configured to supply hydraulic fluid from the supply line to the hydraulic cylinder when activated, a second valve configured to return hydraulic fluid from the hydraulic cylinder to the return line when activated, and a third valve configured to bypass the first and second valves by redirecting the hydraulic fluid from the supply line to the return line when deactivated; anda controller in communication with the plurality of valves, the controller ...

Manifold base for electromagnetic valve and manifold-type electromagnetic valve

[Object] There is provided a manifold base and a manifold-type electromagnetic valve that uses the manifold base, wherein a silencer for attenuating exhaust noise of solenoid valves is embedded in a base body, thereby enabling streamlined designing of the base body. [Solution] Main channels 9 a and 9 b are provided in a base body 2 so as to pass through the base body 2 in a direction of arranging valve mounting regions 3 in a row. In addition, communicating openings 10 a and 10 b are also provided in the base body 2 so as to allow the main channels 9 a and 9 b to communicate with a valve mounting surface 2 A that is the top surface of the base body 2 . The communicating openings 10 a and 10 b open at the valve mounting surface 2 A so as to cross the valve mounting regions 3 , and silencers 50 is installed in respective communicating openings 10 a and 10 b so as to extend in the longitudinal direction of the communicating openings 10 a and 10 b.

HYDRAULIC FLUID WARMUP SYSTEM AND METHOD

In accordance with an example embodiment, a system for managing a unique hydraulic system warmup method is described. A warmup system controller is central to the system and provides an interfacing point for communication to hardware components and a machine operator. The warmup system issues commands based on sensor inputs in light of defined rules and/or known physical properties of hydraulic fluids. Hydraulic system warmup is managed by the warmup system controller, which is configured to issue commands to affect hydraulic pumps and valves. By way of a controller managed process, the system functions to maximize hydraulic system pressure and limiting release of pressures in the lines, such that the pumps are able to maintain maximum pressure for a sufficient period of time. 1. A method of controlling fluid temperature in a hydraulic system of a work machine , the machine including a controller , a user control , a temperature sensor , an electro-hydraulic pump , a control valve , and an implement , the method comprising:detecting a fluid temperature with the temperature sensor; electronically commanding the pump to a full pressure setting;', 'receiving a signal from the user control to control movement of the implement;', 'controllably moving the control valve from a first position to a second position to allow hydraulic fluid to flow from the pump to the implement;', 'actuating the implement in accordance with the signal from the user control;', 'comparing the fluid temperature to the temperature threshold; and', 'performing the executing step until the fluid temperature is at or above the temperature threshold for a predefined period of time., 'executing a warmup function when the fluid temperature is below a temperature threshold, the warmup function comprising2. The method of claim 1 , wherein the controllably moving step comprises sending an electrical command to the control valve to induce movement thereof.3. The method of claim 2 , wherein the controller ...

VARIABLE FLOAT AND VARIABLE BLADE IMPACT

A method and control system operable to control movement of a work implement of a work vehicle. The control system includes a reservoir that retains fluid, a pump in fluid communication with the reservoir, and an actuator in fluid communication with the pump. The actuator has a first side and a second side. A control valve is fluidly positioned between the pump and the actuator, a first proportional relief valve is fluidly positioned between the pump and the first side of the actuator, and a second proportional relief valve is fluidly positioned between the pump and the second side of the actuator. The first proportional relief valve is configured to permit flow of fluid from the first side of the actuator to the reservoir when a pressure at the first side of the actuator exceeds a pressure set point. 1. A work vehicle comprising:a frame;a prime mover connected to the frame;an operator cab connected to the frame;a work implement moveable with respect to the frame; and a pump,', 'an actuator in fluid communication with the pump, the actuator including a first side and a second side,', 'a control valve fluidly positioned between the pump and the actuator,', 'a controller in electrical communication with the control valve,', 'a reservoir in fluid communication with the actuator,', 'a first proportional pressure relief valve fluidly positioned between the reservoir and the first side of the actuator, the first proportional pressure relief valve configured to permit flow of fluid from the first side of actuator to the reservoir in response to a pressure at the first side of the actuator being greater than a predetermined pressure value, and', 'a second proportional pressure relief valve fluidly positioned between the reservoir and the second side of the actuator., 'a control circuit operable to control movement of the work implement, the control circuit including'}2. The work vehicle of claim 1 , the control circuit further comprising a position sensor configured to ...

PNEUMATIC SYSTEM HAVING NOISE REDUCTION FEATURES FOR A MEDICAL FLUID MACHINE

A pneumatic system for a medical fluid machine operating a medical fluid cassette, the pneumatic system including an interface for supplying positive pneumatic pressure and negative pneumatic pressure to the medical fluid cassette; a source of positive pneumatic pressure; a source of negative pneumatic pressure; and a pneumatic pump including a first head and a second head, wherein the first head is dedicated to supplying positive pneumatic pressure to the positive pneumatic pressure source and the second head is dedicated to supplying negative pneumatic pressure to the negative pneumatic pressure source. 1. A pneumatic system for a medical fluid machine operating a medical fluid cassette , the pneumatic system comprising:an interface for supplying positive pneumatic pressure and negative pneumatic pressure to the medical fluid cassette;a source of positive pneumatic pressure;a source of negative pneumatic pressure; anda pneumatic pump including a first head and a second head, wherein the first head is dedicated to supplying positive pneumatic pressure to the positive pneumatic pressure source and the second head is dedicated to supplying negative pneumatic pressure to the negative pneumatic pressure source.2. The pneumatic system of claim 1 , which is configured to supply positive pneumatic pressure from the first head to the positive pneumatic pressure source and negative pressure from the second head to the negative pneumatic pressure source simultaneously.3. The pneumatic system of claim 1 , which includes a valve manifold assembly communicating pneumatically between the sources of positive and negative pneumatic pressure and the medical fluid cassette interface.4. The pneumatic system of claim 3 , wherein at least one of the positive pneumatic pressure source claim 3 , the negative pneumatic pressure source claim 3 , or the pneumatic pump is mounted to the valve manifold assembly.5. The pneumatic system of claim 1 , wherein the interface includes a machine ...

ROTARY HYDRAULIC ACTUATOR SEAL

A sealing assembly includes an elastomer seal having an inner surface and a polymer cap bonded to the inner surface of the elastomer seal and having a dynamic sealing surface. The polymer cap is configured to form a continuous fluid-tight seal against a curved element when pressurized. 1. A sealing assembly , comprising:an elastomer seal having an inner surface; anda polymer cap bonded to said inner surface of said elastomer seal and having a dynamic sealing surface, said polymer cap being configured to form a continuous fluid-tight seal against a curved element when said polymer cap is pressurized.2. The sealing assembly according to claim 1 , wherein at least one of said elastomer seal and said polymer cap defines a substantially oval shape.3. The sealing assembly according to claim 2 , wherein said elastomer seal and said polymer cap both define a substantially oval shape.4. The sealing assembly according to claim 1 , wherein said elastomer seal includes a first seal portion connected to a second seal portion claim 1 , said first seal portion defining a first seal cross-sectional shape and said second seal portion defining a second seal cross-sectional shape that is different than said first seal cross-sectional shape.5. The sealing assembly according to claim 4 , wherein said first seal portion includes a first seal outer surface and said second seal portion includes a second seal outer surface claim 4 , said first seal outer surface being continuous with said second seal outer surface claim 4 , said first seal outer surface having a different shape than said second seal outer surface.6. The sealing assembly according to claim 4 , wherein at least one of said first seal portion and said second seal portion has a groove formed therein.7. The sealing assembly according to claim 4 , wherein at least one of said first seal portion and said second seal portion includes at least one rounded corner.8. The sealing assembly according to claim 7 , wherein said at least ...

Hydrostatic Valve Arrangement, Hydrostatic Gear Having the Valve Arrangement, and Hydrostatic Drive Having the Gear

A hydrostatic valve arrangement for flushing pressure medium from a working line of a hydraulic circuit includes a flushing valve with a first flushing connection for connecting to a first working line and an output connection for connecting to a pressure medium sink. The arrangement also includes a pressure valve arranged in a pressure medium flow path of the arrangement from the output connection in the direction of the pressure medium sink. The pressure valve has a valve body on which a force equilibrium is formed. The force equilibrium includes a pressure equivalent that acts on the valve body in a direction that blocks the pressure medium flow path and an opening pressure that acts in a direction that opens the pressure medium flow path and is dependent on the pressure at the output connection. The arrangement further includes an adjusting device for shifting the force equilibrium. 1. A hydrostatic valve arrangement for flushing pressure medium from at least one working line of a hydraulic circuit , comprising:a flushing valve that includes a first flushing connection configured to connect to a first working line of the circuit and an output connection configured to connect to a pressure medium sink;a pressure valve arranged in a pressure medium flow path of the arrangement for the output connection in the direction of the pressure medium sink, the pressure valve having a valve body on which a force equilibrium is formed, the force equilibrium including (i) at least one pressure equivalent that acts on the valve body in a direction of a blocking of the pressure medium flow path and (ii) an opening pressure that acts in a direction of an opening of the pressure medium flow path and is dependent on the pressure at the output connection; andan adjusting device configured to shift the force equilibrium, the adjusting device further configured such that the opening pressure is adjusted by the adjusting device.2. The valve arrangement according to claim 1 , wherein ...

LOW NOISE CONTROL ALGORITHM FOR HYDRAULIC SYSTEMS

A hydraulic pump radiant noise reduction method for a forklift or other work machine is disclosed. The method includes initiating a noise control algorithm that is enabled during periods when the displacement of the hydraulic pump remains in the zero displacement position and an operator is not demanding flow from any of the hydraulic branch circuits. When the noise control algorithm is enabled, the control valve assembly associated with the hydraulic branch circuit having the lowest hydraulic fluid pressure in relation to the hydraulic fluid pressures of all other hydraulic branch circuits is opened while the remaining control valve assemblies are in held or placed in a closed position. In an alternative embodiment, a drain valve assembly is provided that is opened when the noise control algorithm is activated. 1. A hydraulic pump radiant noise reduction method including the steps of:(a) providing a hydraulic system having a variable displacement pump in selective fluid communication with a plurality of hydraulic branch circuits, each of the hydraulic branch circuits having a control valve assembly and containing hydraulic fluid at a hydraulic fluid pressure;(b) determining that the pump displacement is in a zero displacement position and that an operator is not demanding flow from any of the hydraulic branch circuits;(c) initiating a noise control algorithm that is enabled as long as the pump displacement remains in the zero displacement position and an operator is not demanding flow from any of the hydraulic branch circuits; and(d) the noise control algorithm including, opening the control valve assembly associated with the hydraulic branch circuit having the lowest hydraulic fluid pressure in relation to the hydraulic fluid pressures of all other hydraulic branch circuits while ensuring that all remaining control valve assemblies are in a closed position.2. The hydraulic pump radiant noise reduction method of claim 1 , wherein the step of opening the control ...

ROD ASSEMBLY AND FLUID PRESSURE DEVICE

A rod assembly for a fluid pressure cylinder has a rod member and a packing that is mounted on an outer circumferential part of the rod member and slides along a slide hole. Assembly is simple because a conventional hard piston is not used. The assembly can be carried out simply by hand without the use of a dedicated tool. Thus, the rod assembly simplifies assembly work. 1. A rod assembly configured to reciprocate along a slide hole of a fluid pressure device , comprising:a rod member; anda packing attached to an outer circumferential part of the rod member and configured to slide along the slide hole.2. The rod assembly according to claim 1 , wherein:the rod member includes, in the outer circumferential part, a stopper receiving groove extending in a circumferential direction;a stopper member divided into a plurality of elements in the circumferential direction is installed into the stopper receiving groove; andthe packing covers the stopper member, and thus the stopper member supports the packing and is prevented from coming off the stopper receiving groove.3. The rod assembly according to claim 1 , wherein the packing also functions as a damper configured to relieve impact occurring when the rod member reaches a stroke end.4. The rod assembly according to claim 1 , wherein the rod member has a hollow shape.5. The rod assembly according to claim 4 , wherein:a damper member configured to relieve impact occurring when the rod member reaches a stroke end is attached to an end portion of the rod member; andthe damper member airtightly or liquid-tightly blocks up a hollow portion of the rod member.6. The rod assembly according to claim 5 , wherein an outer circumferential part of the damper member is attached to an inner circumferential part of the rod member.7. The rod assembly according to claim 5 , wherein a supporting member configured to be harder than the damper member and to support the damper member is disposed in the hollow portion of the rod member.8. The rod ...

HYDRAULIC GAGE CONTROL CYLINDER ANTI-DEADHEAD DEVICE

A hydraulic gage system is provided that includes a cylinder structure that is configured to allow the movement of a piston structure. The cylinder structure includes a plurality of vent structures that allows for the releasing of hydraulic fluid. A cover is positioned on the cylinder structure so when the piston passes the vent structures it relieves pressure as well as diminishes the force of impact on the cover by the piston. 1. A hydraulic gage system comprising:a cylinder structure that is configured to allow the movement of a piston structure;wherein the cylinder structure includes a plurality of vent structures that allows for the releasing of hydraulic fluid; anda cover that is positioned on the cylinder structure so when the piston passes the vent structures it relieves pressure as well as diminishes the force of impact on the cover by the piston.2. The hydraulic gage system of claim 1 , wherein the cylinder structure comprises a blind side port to release hydraulic fluids via vent structures.3. The hydraulic gage system of claim 1 , wherein the cover comprises a rod side port to release hydraulic fluids via the vent structures.4. The hydraulic gage system of claim 1 , wherein the cover comprises a plurality of bolts positions for structural support.5. The hydraulic gage system of claim 1 , wherein the cylinder structure comprises one or more seals and guide bands.6. The hydraulic gage system of claim 1 , wherein the cover comprises one or more seals and guide bands.7. The hydraulic gage system of claim 1 , the size of the vent grooves are calculated based on flow.8. The hydraulic gage system of claim 7 , wherein the length of these vent structures are is set so the piston is completely over the vent structure before the piston reaches the cover.9. A method of forming a hydraulic gage system comprising:configuring a cylinder structure so as to allow the movement of a piston structure; wherein the cylinder structure includes a plurality of vent structures ...

HYDRAULIC ACTUATOR END STROKE STOP PRESSURE/LOAD CONTROL

A system for providing pressure/load control at an end stroke stop is provided. The system includes an actuator housing having an end stroke stop and a first actuator housing side, an actuator piston provided in the actuator housing, wherein the actuator piston is movable along a longitudinal axis (A), the actuator piston having a first piston portion perpendicular to the longitudinal axis (A), and means for regulating the pressure/load control at the end stroke stop provided in the first piston portion, wherein the means for regulating the pressure/load control at the end stroke stop is configured to move from a closed position to an open position when in contact with the first actuator housing side. 1. A system for providing pressure/load control at an end stroke stop , the system comprising:an actuator housing having an end stroke stop and a first actuator housing side;an actuator piston provided in the actuator housing, wherein the actuator piston is movable along a longitudinal axis (A), the actuator piston having a first piston portion perpendicular to the longitudinal axis (A); andmeans for regulating the pressure/load control at the end stroke stop provided in the first piston portion, wherein the means for regulating the pressure/load control at the end stroke stop is configured to move from a closed position to an open position when in contact with the first actuator housing side;wherein the first piston portion has an opening that extends through a first piston portion side to a second piston portion side;wherein the means for regulating the pressure/load control at the end stroke stop comprises:a ball bearing,a first biasing spring, a rod,a valve assembly casing,wherein, when the valve assembly casing contacts the first actuator housing side, in use, the rod is configured to move to contact the ball bearing such that the means for regulating the pressure/load control at the end stroke stop provides fluid flow through the opening.2. (canceled)3. The ...

RAILWAY VEHICLE VIBRATION DAMPING DEVICE

A railway vehicle vibration damping device includes an actuator and a control unit controlling a pump and controls a rotation speed of the pump based on a vehicle speed of a railway vehicle. 1. A railway vehicle vibration damping device comprising:an actuator which includes a cylinder body expanding or contracting by supply of a hydraulic fluid and a pump supplying the hydraulic fluid to the cylinder body and is provided in a railway vehicle; anda control unit which controls the pump,wherein the control unit controls a rotation speed of the pump based on a vehicle speed of the railway vehicle.2. The railway vehicle vibration damping device according to claim 1 ,wherein a low rotation speed is set for the rotation speed of the pump in advance,wherein a high rotation speed which is higher than the low rotation speed is set for the rotation speed of the pump in advance,wherein a first threshold value is set for the vehicle speed in advance,wherein the control unit switches the rotation speed of the pump from the high rotation speed to the low rotation speed when the vehicle speed changes from a value equal to or larger than the first threshold value to a value smaller than the first threshold value and switches the rotation speed of the pump from the low rotation speed to the high rotation speed when the vehicle speed changes from a value smaller than the first threshold value to a value equal to or larger than the first threshold value.3. The railway vehicle vibration damping device according to claim 1 ,wherein the control unit gradually increases the rotation speed of the pump when the vehicle speed increases.4. The railway vehicle vibration damping device according to claim 1 ,wherein the control unit increases the rotation speed of the pump in proportion to an increase in vehicle speed.5. The railway vehicle vibration damping device according to claim 1 ,wherein a low rotation speed is set for the rotation speed of the pump in advance,wherein a high rotation speed ...

Valve Manifold with Breather Protection

A valve manifold for a fluid tank is disclosed, as well as methods for fluid circulation between a valve manifold and a fluid tank. The valve manifold and methods may include a breather that is configured to receive atmospheric air. The valve manifold and methods may also include a first check valve that is in fluid communication with a breather and that is configured to allow fluid intake into the valve manifold. The valve manifold and methods may further include a second check valve configured to allow fluid exhaust out of the valve manifold. 1. A valve manifold for a fluid tank , comprising:a breather configured to receive atmospheric air;a first check valve in fluid communication with the breather and configured to allow fluid intake into the valve manifold; anda second check valve configured to allow fluid exhaust out of the valve manifold.2. The valve manifold of claim 1 , wherein the first check valve is a screw-in cartridge check valve claim 1 , and the second check valve is a screw-in cartridge check valve.3. The valve manifold of claim 1 , wherein the breather is a screw-in dome breather.4. The valve manifold of claim 1 , wherein the breather includes a filter element.5. The valve manifold of claim 1 , further comprising:a first port configured to engage with a fluid conduit;a second port configured to engage with the breather; anda third port configured to engage with an exhaust conduit.6. The valve manifold of claim 1 , further comprising a first manifold conduit claim 1 , a second manifold conduit and a third manifold conduit.7. The valve manifold of claim 6 , wherein the first check valve provides fluid communication between the first manifold conduit and the second manifold conduit claim 6 , and wherein the second check valve provides fluid communication between the second manifold conduit and the third manifold conduit.8. The valve manifold of claim 6 , wherein the first manifold conduit claim 6 , the first check valve and the second manifold conduit ...

DUAL-RATE BRAKE VACUUM BOOSTER

The present invention provides a dual-rate brake vacuum booster including a control valve body, a rubber reaction plate and a reaction rod, the rubber reaction plate being clamped between an end face of the control valve body and a base plate of the reaction rod, wherein accommodating spaces for accommodating an expansion deformation of the rubber reaction plate are respectively provided between a periphery of an end portion on one side of the rubber reaction plate and a periphery of the end face of the control valve body, and between a periphery of an end portion on the other side of the rubber reaction plate and the base plate of the reaction rod. The dual-rate brake vacuum booster prolongs the service life of the rubber reaction plate and can realize the dual-rate braking without using an additional element, thereby resulting in easy processing, simple structure and reduced cost. 1. A dual-rate brake vacuum booster comprising: a control valve body , a rubber reaction plate , and a reaction rod , the rubber reaction plate being clamped between an end face of the control valve body and a base plate of the reaction rod , characterized in that , accommodating spaces for accommodating an expansion deformation of the rubber reaction plate is respectively provided between a periphery of an end portion on one side of the rubber reaction plate and a periphery of the end face of the control valve body , and between a periphery of an end portion on the other side of the rubber reaction plate and the base plate of the reaction rod.2. The dual-rate brake vacuum booster according to claim 1 , wherein a cross-section of the accommodating space between the end portion of the rubber reaction plate and the base plate of the reaction rod is triangular or quadrangular.3. The dual-rate brake vacuum booster according to claim 1 , wherein a cross-section of the accommodating space between the end portion of the rubber reaction plate and the end face of the control valve body is ...

HYDRAULIC SYSTEM HAVING MULTIPLE CLOSED LOOP CIRCUITS

A hydraulic system is disclosed. The hydraulic system may have a first pump, a boom cylinder, and a first closed loop fluidly connecting the first pump to the boom cylinder. The hydraulic system may also have a second pump, a swing motor, and a second closed loop fluidly connecting the second pump to the swing motor. The hydraulic system may further have a third pump, an auxiliary actuator, and a third closed loop fluidly connecting the third pump to the auxiliary actuator. The hydraulic system may additionally have a combining valve configured to selectively connect the second closed loop to the first closed loop during a boom raising operation, and a control valve configured to selectively connect the third closed loop to the first closed loop during a boom lowering operation. 1. A hydraulic system , comprising:a first pump;a boom cylinder;a first closed loop fluidly connecting the first pump to the boom cylinder;a second pump;a swing motor;a second closed loop fluidly connecting the second pump to the swing motor;a third pump;an auxiliary actuator;a third closed loop fluidly connecting the third pump to the auxiliary actuator;a combining valve configured to selectively connect the second closed loop to the first closed loop during a boom raising operation; anda control valve configured to selectively connect the third closed loop to the first closed loop during a boom lowering operation.2. The hydraulic system of claim 1 , further including a travel motor fluidly connected to the first pump via the first closed loop.3. The hydraulic system of claim 2 , further including a plurality of metering valve disposed between the boom cylinder and the first pump.4. The hydraulic system of claim 3 , further including a switching valve disposed between the travel motor and the first pump.5. The hydraulic system of claim 4 , wherein:the switching valve is a first switching valve; andthe hydraulic system further includes a second switching valve disposed between the swing ...

Grid scale energy storage systems using reheated air turbine or gas turbine expanders

Electrical power systems, including generating capacity of a gas turbine, where additional power is generated from an air expander and gas turbine simultaneously from a stored compressed air and thermal system.

FLOW RATE SETTING SYSTEM OF WORKING MACHINE

A flow rate setting system of a working machine, includes: an attachment configured to be attached to the working machine; a control part configured to control a flow of hydraulic operation fluid based on a maximum flow rate of the hydraulic operation fluid being to be supplied to the attachment, the control part being mounted on the working machine; and a mobile terminal configured to communicate in wireless communication, the mobile terminal including: a first obtaining part configured to obtain identification information, the identification information being used for identifying the attachment; a second obtaining part configured to obtain the maximum flow rate of the attachment; and an output part configured to output the identification information and the maximum flow rate to the working machine in the wireless communication, the identification information being obtained by the first obtaining part, the maximum flow rate being obtained by the second obtaining part. 1. A flow rate setting system of a working machine , comprising:an attachment configured to be attached to the working machine;a control part configured to control a flow of hydraulic operation fluid based on a maximum flow rate of the hydraulic operation fluid being to be supplied to the attachment, the control part being mounted on the working machine; and a first obtaining part configured to obtain identification information, the identification information being used for identifying the attachment;', 'a second obtaining part configured to obtain a maximum flow rate of the attachment; and', 'an output part configured to output the identification information and the maximum flow rate to the working machine in the wireless communication, the identification information being obtained by the first obtaining part, the maximum flow rate being obtained by the second obtaining part., 'a mobile terminal configured to communicate in wireless communication, the mobile terminal including2. The flow rate setting ...

Micro dampers for prevention of un-commanded motion in mechanical feedback actuators

Apparatus for providing mechanical feedback of a position of an actuator to a controller in a high vibration environment. The apparatus includes a member that contacts a cam surface of the actuator such that movement of the actuator and cam surface causes the member to move. The apparatus also includes a spring that exerts a force on the member toward the cam surface to maintain contact between the member and the cam surface. The apparatus also includes a damper that dampens motion of the member, thereby eliminating resonant movement of the spring and member caused by vibrations.

Hydraulic Circuit including Hydraulic Decompression Energy Reclamation

A hydraulic circuit includes a prime mover that is configured to generate an oscillating flow of hydraulic fluid, and an actuator that is driven by the prime mover and configured to provide oscillating motion and to be connected to a load in each direction of the motion. The hydraulic circuit also includes a reclamation device that is disposed in the hydraulic circuit between the prime mover and the actuator. The reclamation device captures and stores a portion of hydraulic fluid displaced from the actuator during a transition between opposed motions, where the portion of hydraulic fluid corresponds to an amount of hydraulic fluid equal to a volume of fluid required to compensate for compression of fluid within the hydraulic circuit due to system pressure and load pressure. The stored fluid is used by the circuit in a subsequent motion.

HYDRAULIC CONTROL VALVE WITH VISUAL IDENTIFICATION SYTEM

A hydraulic control valve can be one type of a variable characteristic (e.g., coil voltage). A visual identification system is provided to permit the visual identification of the specific type of the variable characteristic that the control valve is to assist in the assembly of systems utilizing such control valves. The visual identification system includes first and second indicator bearing first and second indicia, respectively, configured to indicate a first value and a different second value of a variable characteristic, respectively. The first and second indicator members are configured to be separately removably mounted to the control valve via a mechanical connection substantially without adhesive such that the appropriate indicator member can be selected and mounted to the valve depending upon what type of valve it is. 1. A hydraulic control valve comprising:a control valve cartridge assembly, the control valve cartridge assembly including a movable member, the movable member being movable over a range of travel between a first flow position and a second flow position;an electro-magnetic actuator, the electro-magnetic actuator mounted to the control valve cartridge assembly and operatively associated with the movable member of the control valve cartridge assembly to selectively move the movable member from the first flow position to the second flow position;wherein at least one of the control valve cartridge assembly and the electro-magnetic actuator includes a visual identifier mounting member; anda visual identification system, the visual identification system including a first indicator member and a second indicator member, the first indicator member having an external surface bearing a first indicia, and the second indicator member having an external surface bearing a second indicia, the second indicia being different from the first indicia, the first and second indicator members each being configured to be separately removably mounted to the visual ...

Pneumatic Control Device and Process Control Device Equipped Therewith

A pneumatic control device includes a functional assembly that has an interruption valve device for the selective opening or interruption of at least one main working channel used for the pneumatic control of a pneumatic actuator. The functional assembly also contains a manually actuatable valve device that is connected to the interruption valve device by means of at least one auxiliary working channel and which enables manual pneumatic control of the connected actuator, if the at least one main working channel is interrupted by the interruption valve device at the same time. A process control device can also be equipped with a control device of this type. 1. A process control device comprising:a functional assembly module, the functional assembly module having a housing, at least one main working channel within the housing, at least one auxiliary working channel within the housing, an interruption valve device contained within the housing for the selective opening or interruption of the at least one main working channel, a manually actuatable valve device connected to the interruption valve device via the at least one auxiliary working channel, and an assembly interface formed on an exterior of the housing;a pneumatic actuator connected to the functional assembly module housing, the pneumatic actuator being pneumatically controlled by the interruption valve device of the functional assembly module via the at least one main working channel, and being further pneumatically controlled by the manually actuatable valve device via the at least one auxiliary working channel only when the at least one main working channel is interrupted by the interruption valve device; andan electropneumatic control unit module detachably connected to the functional assembly module housing, the electropneumatic control unit module having a housing, an assembly interface formed on an exterior of the housing for detachable engagement with the assembly interface of the functional assembly ...

WORKING MACHINE

A working machine includes a vehicle body, a travel apparatus provided to a rear portion of the vehicle body, a fender provided above the travel apparatus, and hydraulic piping that is disposed between the travel apparatus and the fender and that extends from a front-portion side to a rear-portion side of the fender. 1. A working machine , comprising:a vehicle body;a travel apparatus provided on a rear portion of the vehicle body;a fender provided above the travel apparatus; andhydraulic piping that is disposed between the travel apparatus and the fender and that extends from a front-portion side to a rear-portion side of the fender.2. The working machine according to claim 1 ,wherein the hydraulic piping comprises a plurality of hydraulic pipes, andwherein the plurality of hydraulic pipes is disposed below the fender so height positions of hydraulic pipes lined up in a width direction of the vehicle body differ.3. The working machine according to claim 1 , further comprising:a first bracket that is installed to the fender and supports the hydraulic piping below the fender.4. The working machine according to claim 1 , further comprising:a cabin provided to an upper portion of the vehicle body; anda second bracket that is installed to a lower portion of the cabin and that supports the hydraulic piping in front of the fender and to a side of the cabin.5. The working machine according to claim 1 , further comprising:a front wheel provided on a front portion of the vehicle body;a vehicle-body frame that supports the front wheel; anda third bracket that is installed on the vehicle-body frame and that supports the hydraulic piping to a side of the vehicle-body frame.6. The working machine according to claim 5 , further comprising:a hydraulic pump provided to the rear portion of the vehicle body,wherein the hydraulic piping comprises a drain pipe that returns a hydraulic fluid to the hydraulic pump, andwherein the third bracket comprises a drain support portion that ...

Damping device

A damping device, in particular for damping or avoiding pressure surges, such as pulses, in hydraulic supply circuits, preferably in the form of a silencer, having a damping housing which surrounds a damping chamber and has at least one fluid inlet ( 3 ) and at least one fluid outlet ( 5 ) and a fluid receiving chamber ( 7 ) which extends between the fluid inlet and the fluid outlet, wherein, during operation of the device, a fluid flow crosses the damping chamber in a throughflow direction ( 11 ), coming from the fluid inlet ( 3 ) in the direction of the fluid outlet ( 5 ), and wherein at least parts of the fluid receiving chamber ( 7 ) extend in at least one extent direction transversely with respect to the throughflow direction ( 11 ), is characterized in that the fluid receiving chamber immediately adjoins the fluid inlet ( 3 ) and the fluid outlet ( 5 ) and in that a guide element ( 51 ) is provided in the damping chamber, the fluid flow being able to flow against the guide element and the guide element changing the flow speed of the flow at least in sections.

HYDRAULIC CONTROL DEVICE FOR VEHICLE DRIVE DEVICE

A hydraulic control device for a vehicle drive device that includes a first layer having a first opposing surface, a first groove formed in the first opposing surface, and a first bonding formed on the first opposing surface and surrounding the first groove; and a second layer having a second opposing surface facing the first opposing surface, a second groove facing the first groove and formed in the second opposing surface, and a second bonding facing the first bonding, surrounding the second groove, and bonded to the first bonding, the second opposing surface being placed on, and bonded to, the first opposing surface, so that the first groove and the second groove form a first oil passage. 110-. (canceled)11. A hydraulic control device for a vehicle drive device , comprising:a first layer having a first opposing surface, a first groove formed in the first opposing surface, and a first bonding formed on the first opposing surface and surrounding the first groove; and the first bonding is a protrusion protruding toward the second bonding,', 'the second bonding is a recess having the protrusion fitted therein, and', 'the first bonding and the second bonding are bonded together to surround and seal the first oil passage located in both the first opposing surface and the second opposing surface., 'a second layer having a second opposing surface facing the first opposing surface, a second groove facing the first groove and formed in the second opposing surface, and a second bonding facing the first bonding, surrounding the second groove, and bonded to the first bonding, the second opposing surface being placed on, and bonded to, the first opposing surface, so that the first groove and the second groove form a first oil passage, wherein'}12. The hydraulic control device for the vehicle drive device according to claim 11 , whereina height of the protrusion is smaller than a depth of the recess, and a space between a distal end face of the protrusion and a bottom surface ...

Predictively Adjustable Hydraulic Pressure Rails

A robotic device may traverse a path in a direction of locomotion. Sensor data indicative of one or more physical features of the environment in the direction of locomotion may be received. The implementation may further involve determining that traversing the path involves traversing the one or more physical features of the environment. Based on the sensor data indicative of the one or more physical features of the environment in the direction of locomotion, a hydraulic pressure to supply to the one or more hydraulic actuators to traverse the one or more physical features of the environment may be predicted. Before traversing the one or more physical features of the environment, the hydraulic drive system may adjust pressure of supplied hydraulic fluid from the first pressure to the predicted hydraulic pressure.

HYDRAULIC FLUID PRESSURE COMPENSATOR UNIT WITH INTEGRATED LOAD SENSE AND REVERSE FLOW CHECKS

Hydraulic pressure compensator units and hydraulic systems incorporating hydraulic pressure compensator units. The pressure compensator units include a main valve body defining a central axis and a first central passage, a compensation valve member positioned in the first central passage and defining a second central passage, the first central passage being in selective fluid communication with a port of hydraulic actuator. A load sense check component is positioned within the second central passage and adapted to move in a first axial direction to selectively open a fluid communication between a pump output and a load sense line. A reverse flow check component is positioned within the second central passage and adapted to move in a second axial direction opposite the first axial direction to selectively open a fluid communication between the hydraulic actuator and a tank line. 1. A hydraulic pressure compensator unit comprising:a main valve body defining a central axis and a first central passage;a compensation valve member positioned in the first central passage and defining a second central passage, a first opening defined by the main valve body adapted to be in selective fluid communication with a port of a hydraulic actuator via a second opening defined by the main valve body;a load sense check component positioned within the second central passage and adapted to move axially relative to the compensation valve member between a load sense open position and a load sense closed position, the load sense open position being in a first axial direction away from the load sense closed position, wherein in the load sense open position the first opening is adapted to be in fluid communication with a load sense line via a third opening defined by the main valve body, and wherein in the load sense closed position the first opening is adapted to be blocked from fluid communication with the load sense line; anda reverse flow check component positioned within the second ...

Sealing High Pressure Flow Devices

Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure. 1. An apparatus , comprising:a fluid end housing in which a plurality of bores, including a plunger bore and a suction bore, are formed, wherein the plunger bore has a first segment and a second segment, wherein the first segment has a groove and is located closer to the suction bore than the second segment, and wherein the second segment has a greater diameter than the first segment; a first sleeve portion having a constant first inner diameter and a constant first outer diameter;', 'a second sleeve portion having a constant second inner diameter and a constant second outer diameter, wherein the second inner diameter and second outer diameter are greater than the first inner diameter and first outer diameter, respectively; and', 'a third sleeve portion that includes at least one groove around an exterior of the third sleeve portion;, 'a sleeve installed within the plunger bore, wherein the sleeve includeswherein the first sleeve portion is installed within the first segment of the plunger bore and the second sleeve portion and third sleeve portion are installed within the second segment of the plunger bore such that the second sleeve portion is closer to the first sleeve portion;stuffing box packing located within the second and third sleeve portions; anda seal that is positioned in the groove and that engages with the first sleeve portion.2. The apparatus of claim 1 , wherein the third sleeve portion has a third constant inner diameter that is the same as the second inner diameter.3. The apparatus of claim 1 , wherein the first segment of the plunger bore and the second segment ...

HYDRAULIC SYSTEM AND METHOD FOR REDUCING BOOM BOUNCE WITH COUNTER-BALANCE PROTECTION

A hydraulic system () and method for reducing boom dynamics of a boom (), while providing counter-balance valve protection, includes a hydraulic cylinder (), first and second counter-balance valves (), first and second control valves (), and a selection valve set (). The selection valve set is adapted to self-configure to a first configuration and to a second configuration when a net load () is supported by a first chamber () and a second chamber () of the hydraulic cylinder, respectively. When the selection valve set is enabled in the first and second configurations, the second and first control valve may fluctuate hydraulic fluid flow to the second and first chamber, respectively, to produce a vibratory response () that counters environmental vibrations () of the boom. When the selection valve set is not enabled, the first and second counter-balance valves are adapted to provide the hydraulic cylinder with conventional counter-balance valve protection. 1. A hydraulic system comprising:a hydraulic cylinder including a first chamber and a second chamber;a first counter-balance valve fluidly connected to the first chamber at a first node;a second counter-balance valve fluidly connected to the second chamber at a second node;a first control valve fluidly connected to the first counter-balance valve at a third node;a second control valve fluidly connected to the second counter-balance valve at a fourth node; anda selection valve arrangement fluidly connected to the first node and the second node, the selection valve arrangement adapted to self-configure to a first configuration set when a net load is supported by the second chamber of the hydraulic cylinder and further adapted to self-configure to a second configuration set when the net load is supported by the first chamber of the hydraulic cylinder;wherein when the selection valve arrangement is enabled and at the first configuration set, the first control valve is adapted to fluctuate a first hydraulic fluid flow to ...

Robotic Hydraulic System

A control system may receive sensor data indicative of respective fluid levels of two or more hydraulic accumulators configured to operate at respective target fluid levels within a hydraulic system. The control system may determine respective errors of the hydraulic accumulators based on the respective fluid levels and respective target fluid levels of the hydraulic accumulators. The respective errors may correspond to pressure errors, fluid volume errors, or other types of errors of the hydraulic accumulators. Responsive to determining the respective errors, the control system may determine that the error of a given hydraulic accumulator is greater than errors of the other hydraulic accumulators and provide instructions to control a hydraulic valve to supply fluid from a single pump of the hydraulic system to the given hydraulic accumulator 1. A method comprising:receiving, at a computing device, sensor data indicative of respective fluid levels of a first hydraulic accumulator and a second hydraulic accumulator, wherein the first hydraulic accumulator is configured to operate at a first target fluid level and the second hydraulic accumulator is configured to operate at a second target fluid level;determining a first error of the first hydraulic accumulator based on a fluid level of the first hydraulic accumulator and the first target fluid level and a second error of the second hydraulic accumulator based on a fluid level of the second hydraulic accumulator and the second target fluid level;determining that the first error is greater than the second error; andproviding instructions to control a hydraulic valve of a fluid supply system to supply fluid to the first hydraulic accumulator, wherein the fluid supply system includes a single pump configured to supply the fluid to the first hydraulic accumulator.2. The method of claim 1 , wherein the fluid supply system includes a motor configured to power the single pump at an adjustable speed claim 1 , and wherein the ...

HYDRAULIC ACTUATOR SEALING DEVICE

A hydraulic actuator sealing device includes an annular piston, an annular cancel plate, a return spring, and an annular piston spring seat. The annular piston includes an annular pressure receiving plate portion receiving a load of the return spring, an inner cylinder portion extending from an inner peripheral side of the annular pressure receiving plate portion toward the annular cancel plate, and a bent portion connecting the annular pressure receiving plate portion with the inner cylinder portion and expanding with respect to the annular pressure receiving plate portion in a direction away from the return spring in an axial direction. 1. A hydraulic actuator sealing device comprising:an annular cylinder;an annular piston disposed reciprocally in an axial direction in the annular cylinder;an annular cancel plate fixed to the annular cylinder;a return spring interposed between the annular piston and the annular cancel plate; andan annular piston spring seat interposed between the return spring and the annular piston; a pressure chamber formed between the annular cylinder and the annular piston and allowing hydraulic pressure to be applied to the pressure chamber; and', 'an equilibrium oil chamber formed between the annular cancel plate and the annular piston; and, 'wherein the hydraulic actuator sealing device has an annular pressure receiving plate portion receiving a load of the return spring;', 'an inner cylinder portion extending from an inner peripheral side of the annular pressure receiving plate portion toward the annular cancel plate; and', 'a bent portion connecting the annular pressure receiving plate portion with the inner cylinder portion and expanding with respect to the annular pressure receiving plate portion in a direction away from the return spring in the axial direction., 'wherein the annular piston comprises2. The hydraulic actuator sealing device according to claim 1 , wherein the annular piston spring seat comprises:a bottom portion receiving ...

PROCESS CONTROL DEVICE

A process control device has an electropneumatic control unit which is used for activating a pneumatic actuating drive. The control unit has a fastening module by means of which it is fastened to a drive housing of the actuating drive. The control unit includes an interface plate which is separate from the fastening module, is mounted on a top side of the fastening module and is fluidically connected, through the fastening module, to the actuating drive. The control unit includes an electrically actuatable control valve device which is fixed to the fastening module by being mounted on the interface plate fixed to the fastening module. In this way, a process control device can be produced in an easily and variably configurable manner. 1. A process control device comprising an electropneumatic control unit which is designed to control a pneumatic actuating drive and which comprises a fastening module which has at a lower side a fastening interface which is designed for fastening to a drive housing of the actuating drive and which has an electrically actuatable control valve device which is fixed to the fastening module and which contains at least one control valve and which communicates with at least one drive channel extending through the fastening module fluid connection to the actuating drive , wherein the control unit has an interface plate which is separate from the fastening module and which is mounted on the fastening module at the upper side thereof facing away from the fastening interface and through which an interface plate fluid channel system extends which communicates with the at least one drive channel of the fastening module , wherein the interface plate at the upper side thereof facing away from the fastening module has a mechanical-pneumatic assembly interface on which the control valve device is mounted with simultaneous communication with the interface plate fluid channel system.2. The process control device according to claim 1 , wherein the ...

LOW PRESSURE DROP ACOUSTIC SUPPRESSOR NOZZLE FOR FIRE PROTECTION INERT GAS DISCHARGE SYSTEM

A fire suppression nozzle assembly includes a nozzle having a first tube defining an axially extending passageway. The passageway includes a plurality of primary outlets disposed on a sidewall of the first tube. The nozzle also includes a second tube circumscribing the first tube to define a chamber. The primary outlets provide fluid communication between the passageway and the chamber. A sidewall of the second tube has a first set of radially facing secondary outlets axially offset from the primary outlets in a first direction and a second set of radially facing secondary outlets axially offset from the primary outlets in a second direction opposite the first direction. The nozzles disclosed herein are configured such that gas exiting a plurality of outlet holes is balanced. 1. A nozzle comprising ,a first tube comprising an axially extending passageway and a plurality of primary outlets disposed through a sidewall of the first tube, the passageway including an inlet at an axial end of the passageway, and the plurality of primary outlets having a combined first flow area;a second tube circumscribing the first tube and comprising a plurality of secondary outlets extending through a sidewall of the second tube, the second tube and the first tube defining a chamber therebetween, the plurality of primary outlets providing fluid communication between the passageway and the chamber, and the plurality of secondary outlets having a combined second flow area greater than the combined first flow area; anda plurality of annular discs extending about the second tube.2. The nozzle of claim 1 , wherein the nozzle further comprises claim 1 ,a sound absorbing device disposed in the chamber.3. The nozzle of claim 2 , wherein the sound absorbing device includes a baffle comprising porous sound absorbing material.4. The nozzle of claim 3 , wherein the sound absorbing device includes a first sound absorbing insert and a second sound absorbing insert.5. The nozzle of claim 4 , wherein ...

Method for selectively coupling or uncoupling a coupling, and a coupling therefor

A method for selectively coupling or uncoupling a coupling with a release, arranged between the supply conduit and a cylinder, on the basis of pressure in a supply conduit. The method includes providing an operating pressure prevailing in the supply conduit in order to provide hydraulic liquid to the cylinder on the basis thereof, and providing an uncoupling pressure prevailing in the supply conduit for the purpose of activating shut-off valves in the supply conduit and on the cylinder, and activating a release which uncouples the coupling. A coupling for respectively coupling and uncoupling a supply conduit which is connected to the coupling to/from a cylinder, as well as to an assembly including a pump, a cylinder, a supply conduit between the pump and the cylinder, and such a coupling.

COMPRESSED-AIR SUPPLY SYSTEM, PNEUMATIC SYSTEM AND METHOD FOR OPERATING A COMPRESSED-AIR SUPPLY SYSTEM

A compressed-air supply system for operating a pneumatic installation includes a reservoir, a number of bellows, a pressure-air feed to which a charging assembly having a compressor is connected on a pressure-medium feed side, a pressure-air connection to the pneumatic installation, a venting connection to the environment, a pneumatic main line between the pressure-air feed and the pressure-air connection, a vent line between the pressure-air feed and the venting connection and a changeover valve associated with the pressure-air feed and configured to be controlled by pressure air in such a way that the pressure-air feed is open or can be opened via the changeover valve to the main line. A flow pressure at the pressure-air feed can be generated by the charging assembly to the main line. 1. A compressed-air supply system for operating a pneumatic installation , the compressed-air supply system comprising:a reservoir;a number of bellows;a pressure-air feed, to which a charging assembly having a compressor is connected on a pressure-medium feed side;a pressure-air connection to the pneumatic installation;a venting connection to the environment;a pneumatic main line between the pressure-air feed and the pressure-air connection;a vent line between the pressure-air feed and the venting connection; anda changeover valve associated with the pressure-air feed and configured to be controlled by pressure air in such a way that the pressure-air feed is open or can be opened via the changeover valve to the main line,wherein, a flow pressure at the pressure-air feed can be generated by the charging assembly to the main line,wherein in the unpressurized state of the pressure-air feed, the pressure-air connection is connected to the vent line in terms of flow, in particular an outlet connection can be opened, andwherein in the pressurized state of the pressure-air feed, the pressure-air connection is not connected to the vent line in terms of flow, in particular an outlet ...

Device and Process for Controlling and Optimizing Hydraulic System Performance

A system and process of controlling a hydraulic system in a work machine includes determining if an operation of the hydraulic system of the work machine meets a predetermined criteria with a controller, and operating a drain valve of the hydraulic system such that there is a minimum flow from a hydraulic pump to a drain if the operation of the hydraulic system of the work machine does not meet the predetermined criteria via the controller. The system and process further operating the drain valve of the hydraulic system such that there is a limited flow from the hydraulic pump to the drain if the operation of the hydraulic system of the work machine meets the predetermined criteria via the controller such that the predetermined criteria comprises at least a predetermined time period T since the work implement system of the work machine has been operated. 1. A process of controlling a hydraulic system in a work machine , the process comprising:opening a valve of the hydraulic system such that there is a flow from a hydraulic pump to a work implement system via a controller;determining if an operation of the hydraulic system of the work machine meets a predetermined criteria via the controller;operating a drain valve of the hydraulic system such that there is a minimum flow from a hydraulic pump to a drain if the operation of the hydraulic system of the work machine does not meet the predetermined criteria via the controller; andoperating the drain valve of the hydraulic system such that there is a limited flow from the hydraulic pump to the drain if the operation of the hydraulic system of the work machine meets the predetermined criteria via the controller.2. The process of claim 1 , wherein the predetermined criteria comprises a predetermined time period T since the work implement system of the work machine has been operated.3. The process of claim 1 , wherein the predetermined criteria comprises at least one of the following: reverse gear operation of the work ...

DAMPING DEVICE FOR CLUTCH ACTUATING DEVICE

A damping device for a clutch actuating device is provided. The damping device includes a first cylinder that is connected to a master cylinder by a first hydraulic line and a second cylinder that is connected to an actuating cylinder by a second hydraulic line and is disposed at a position adjacent to the first cylinder in parallel. A first piston is disposed in the first cylinder and is moved forward and backward by a fluid pressure in the first cylinder. A second piston is disposed in the second cylinder and is moved forward and backward by a fluid pressure in the second cylinder. A pressure transmitting member is supported to perform a seesaw motion when both sides of the pressure transmitting member are in contact with a pressing portion of the first piston and a pressing portion of the second piston. 1. A damping device for a clutch actuating device , comprising:a first cylinder connected to a master cylinder by a first hydraulic line;a second cylinder connected to an actuating cylinder by a second hydraulic line and disposed at a position adjacent to the first cylinder in parallel;a first piston disposed in the first cylinder and configured to be moved forward and backward by a fluid pressure in the first cylinder;a second piston disposed in the second cylinder and configured to be moved forward and backward by a fluid pressure in the second cylinder; anda pressure transmitting member supported to perform a seesaw motion when both sides of the pressure transmitting member are in contact with a pressing portion of the first piston and a pressing portion of the second piston.2. The damping device according to claim 1 , further comprising:a support pin configured to support the pressure transmitting member to cause the pressure transmitting member to perform the seesaw motion and configured to change a coupling position.3. The damping device according to claim 2 , wherein a pedal force of the clutch pedal is adjusted by changing a distance between a contact ...

REGULATOR FOR CLUTCH OPERATING MECHANISM

Disclosed is a regulator for clutch operating mechanism. The regulator includes a main body, a supply flow path for fluid flow from a master cylinder to an operating cylinder, and a return flow for fluid flow from the operating cylinder to the master cylinder inside of the main body. The regulator further includes a first valve installed inside the main body and configured to close an exit of the return flow path and open the supply flow path when the fluid flows to the operating cylinder and a second valve installed inside the main body configured to close an exit of the supply flow path and to open the return flow path when the fluid flows to the master cylinder. The regulator further includes a damping apparatus having a damping space which communicates with the supply flow path of the main body and whose internal capacity changes according to hydraulic pressure. 1. A regulator for clutch operating mechanism , comprising:a main body installed on a hydraulic line connecting a master cylinder to an operating cylinder, wherein a supply flow path to make fluid flow from the master cylinder to the operating cylinder, and a return flow path to make the fluid flow from the operating cylinder to the master cylinder are formed in the inside of the main body;a first valve installed in the inside of the main body, and configured to close an exit of the return flow path and to open the supply flow path when the fluid flows to the operating cylinder;a second valve installed in the inside of the main body, and configured to close an exit of the supply flow path and to open the return flow path when the fluid flows to the master cylinder; anda damping apparatus having a damping space which communicates with the supply flow path of the main body and whose internal capacity changes according to hydraulic pressure.2. The regulator for clutch operating mechanism according to claim 1 , wherein the supply flow path and the return flow path are aligned in parallel with the same length ...

VALVE ASSEMBLY FOR MACHINE FLUID OPERATIONS

A fluid system of a machine. The fluid system includes a fluid reservoir, a pump coupled to the fluid reservoir, a filter coupled to the pump and a valve assembly. The valve assembly includes a first port, a second port coupled to the first port and to the fluid reservoir, a third port coupled to the first port, and a first check valve positioned between the first port and the second port. The fluid system further includes a second check valve positioned between the filter and the third port. 1. A fluid system of a machine , the fluid system comprising:a fluid reservoir;a pump coupled to the fluid reservoir;a filter coupled to the pump; a first port;', 'a second port coupled to the first port and to the fluid reservoir;', 'a third port coupled to the first port; and', 'a first check valve positioned between the first port and the second port; and, 'a valve assembly, wherein the valve assembly comprisesa second check valve positioned between the filter and the third port.2. The fluid system of claim 1 , wherein the valve assembly is structured for external connection with respect to a normal fluid flow path of the fluid system.3. The fluid system of claim 1 , wherein the first check valve is configured to allow fluid flow from the fluid reservoir to the first port upon application of negative pressure at the first port.4. The fluid system of claim 1 , wherein the second check valve is configured to allow fluid flow from the first port to the filter upon application of positive pressure at the first port.5. The fluid system of claim 1 , wherein the second check valve is connected directly to the filter.6. The fluid system of claim 1 , further comprising a first fluid line positioned between the second port and the fluid reservoir.7. The fluid system of claim 6 , wherein the first fluid line comprises:a first end coupled to the second port; anda second end coupled to the fluid reservoir.8. The fluid system of claim 1 , further comprising a second fluid line positioned ...

LOCALLY-ACTUATED PARTIAL STROKE TESTING SYSTEM

Embodiments of the present disclosure describe both mechanically-operated and electrically-operated, locally-actuated partial stroke testing devices and systems for testing operation of an emergency isolation valve. 1. A locally-actuated partial stroke testing device for testing a double acting emergency isolation valve , comprising:a mechanically-operated valve with a first vent port, a second vent port, a first working port, and a second working port, the first and second vent ports being operable to vent air from the mechanically-operated valve, and the first working port being coupled to a first flow control valve and the second working port being operable to regulate the air flow to a first solenoid valve coupled to the double acting emergency isolation valve;the first flow control valve operable to regulate the air flow to a second solenoid valve coupled to the double acting emergency isolation valve;a second flow control valve coupled to the first vent port of the mechanically-operated valve, the second flow control valve being operable to regulate air flow;an air supply line coupled to an input port of the mechanically-operated valve, the air supply line having an air filter regulator to filter and regulate air supplied to the input port;a 3/2 solenoid valve with a first port coupled via an first working line to a first working port of the mechanically-operated valve;a second working flow line coupled between a second port of the 3/2 solenoid valve and a first port of the double acting emergency isolation valve; anda valve position indicator to convey position of the double acting emergency isolation valve, the valve position indicator and the mechanically-operated valve being in visual proximity to a user.2. The device of claim 1 , wherein the mechanically-operated valve is a 3/2 manually-operated valve.3. The device of claim 1 , wherein the mechanically-operated valve is a 5/2 manually-operated valve.4. The device of claim 1 , wherein the first flow ...

Subsea Pressure Delivery System

A subsea system including a frame including an intensifier, the intensifier providing structural support to the frame and capable of providing pressurized delivery fluid. The intensifier includes an intensifier chamber and a delivery fluid chamber separated by a piston, the intensifier chamber capable of receiving ambient pressure to provide a pressure on the delivery fluid through the piston. Also, a regulation system regulates the amount of ambient pressure communicated to the intensifier chamber to maintain the delivery fluid pressure substantially constant as the delivery fluid is depleted.

Load sensing control circuit

A pump discharge amount is divided in accordance with switch amounts of respective switch valves (V 1, V 2 ) by leading load pressures of actuators (A 1, A 2 ) to which compensator valves (C 1, C 2 ) are connected to respective first pressure chambers ( 9, 10 ) of the compensator valves (C 1, C 2 ), leading a maximum load pressure selected by a selection unit ( 4 ) to respective second pressure chambers ( 11, 12 ) of the compensator valves (C 1, C 2 ), and controlling respective openings of the compensator valves (C 1, C 2 ) in accordance with respective pressure actions between the respective pressure chambers ( 9, 10, 11, 12 ). A drain passage ( 13 ) is provided to connect the first pressure chamber ( 10 ) of the compensator valve (C 2 ) to a tank (T), and a flow dividing ratio modification valve (CV) is provided to control a pressure in the first pressure chamber ( 10 ).

HYDRAULIC AXIAL PISTON UNIT AND METHOD FOR CONTROLLING OF A HYDRAULIC AXIAL PISTON UNIT

Hydraulic axial piston unit having a rotational group for driving or being driven by a driving shaft, and a tiltable displacement element for adjusting the displacement volume of the rotational group. The rotational group includes a rotatable cylinder block in which working pistons are mounted reciprocally moveable in cylinder bores for conveying hydraulic fluid from a kidney-shaped inlet port to a kidney-shaped outlet port on a valve segment. At least two control ports are located on the valve segment each between the respective circumferential ends of the kidney-shaped inlet port and the outlet port. The control ports can be brought sequentially in fluid connection with the cylinder bores when the cylinder block is rotating. At least one hydraulic fluid injector is connected fluidly to one control port, for sequentially injecting pressurized hydraulic fluid via the control port into the passing cylinder bores. Via the other control port hydraulic fluid can be drained from passing cylinder bores. 2. The method according to claim 1 , further comprising the step of:processing commands of a control unit or an operator by means of an electronic control unit (ECU) having a microcontroller for adapting the timing and/or pressure and/or the amount of hydraulic fluid for being injected via the first control port into the passing cylinder bores, in order to control the pressure in the cylinder bores for controling the displacement volume of the hydraulic axial piston unit.3. The method according to claim 1 , further comprising the steps of:sensing of at least one operational parameter of the hydraulic axial piston unit by means of a sensor selected from a group of sensors comprising at least a tilt angle sensor, a shaft position sensor, a pressure sensor, a flow sensor, a rotational speed sensor, a temperature sensor, a direction sensor, a torque sensor, an acceleration sensor or any other sensor capable to monitor at least one operational parameter of the hydraulic unit; ...

ATTENUATION DEVICE FOR THE FLUID FLOW PULSATION IN A HYDRAULIC CIRCUIT CONNECTED WITH A HYDRAULIC MACHINE

The present invention concerns an attenuation device () of the fluid flow pulsation along a duct of a hydraulic circuit connected with a hydraulic machine, comprising at least an attenuation module () passed through by a pass-through duct () configured to be placed in fluid communication with said duct of said hydraulic circuit. In particular, in said attenuation module () a first duct () is obtained having an opened first end () in fluid communication with said pass-through duct (), and a closed second end, said first duct () extending along a curved line comprising a plurality of curved sections, said first duct () being adapted to attenuate the pulsation of said fluid flow along said duct of said hydraulic circuit to reduce the vibrations generated by said pulsation of said fluid flow. 1. An attenuation device of the fluid flow pulsation along a duct of a hydraulic circuit connected with a hydraulic machine , comprising at least an attenuation module passed through by a pass-through duct configured to be placed in fluid communication with said duct of said hydraulic circuit , wherein in said attenuation module a first duct is obtained having an opened first end in fluid communication with said pass-through duct , and a closed second end , said first duct extending between said opened first end and said closed second end along a curved line comprising a plurality of curved sections , wherein at least two curved sections of said first duct are separated from one another by a shared separation wall , said first duct being adapted to attenuate the pulsation of said fluid flow along said duct of said hydraulic circuit to reduce the vibrations generated by said pulsation of said fluid flow.21. The attenuation device according to claim 1 , wherein the length (L) of the extension of said first duct is substantially equal to ¼ of the wavelength of the main component of the wave of said pulsation of said fluid flow.3. The attenuation device according to claim 1 , wherein ...

Construction Machine

Provided is a construction machine configured such that a hydraulic actuator is driven by a hydraulic pump for a closed circuit, by which oil film breakage of the hydraulic pump for a closed circuit is prevented to improve the reliability and a high operation rate can be obtained. The construction machine includes a switching valve that is provided in a branch hydraulic line connecting one of suction/delivery ports of a closed circuit pump and a charge line to each other and is opened and closed according to a control signal from a controller. The controller is configured to, in a case where a state in which a delivery volume of the closed circuit pump is kept to zero continues for a predetermined time period or more, open the switching valve and keep the delivery volume of the closed circuit pump to a predetermined delivery volume or more, the predetermined delivery volume being greater than zero. 1. A construction machine comprising:a closed circuit pump consisting of a bidirectionally tiltable hydraulic pump having two suction/delivery ports;a hydraulic actuator connected in a closed circuit manner to the closed circuit pump;a charge pump;a charge line connected to a delivery port of the charge pump;a check valve that is provided in a hydraulic line connecting the charge line and the closed circuit pump to each other and permits hydraulic operating fluid to flow from the charge line into the closed circuit pump;a charge relief valve provided in the charge line;an operation lever for instructing an operation of the hydraulic actuator; anda controller that controls a delivery volume of the closed circuit pump according to an input from the operation lever; whereinthe construction machine includes a switching valve that is provided in a hydraulic line connecting one of the suction/delivery ports of the closed circuit pump and the charge line to each other and is opened and closed according to a control signal from the controller, andthe controller is configured to, ...

System and apparatus for processing fluids present in devices having hydraulic systems

A device for reciprocatingly removing and replenishing fluid in circulating system of an hydraulic mechanism that includes at least two processing tanks, at least one air pressure regulator and connector releasably engageable with a pressurized air source, at least one vacuum generator, at least one pressure regulator; and means for removing the fluid from the circulating system at vacuum.

Hydraulic Control Block and Hydraulic Spindle Comprising said Control Block

The disclosure relates to a hydraulic control block for controlling a pressure medium supply of a hydraulic cylinder of a hydraulic spindle. The hydraulic control block includes a generic hydraulic switching structure electively configurable in each of a plurality of specific hydraulic switching structures, each of the plurality of specific hydraulic switching structures having a respective hydraulic cylinder with a number of piston areas which differs from a number of piston areas in the respective hydraulic cylinders of each of the other of the plurality of specific hydraulic switching structures. 1. A hydraulic control block for controlling a pressure medium supply of a hydraulic cylinder of a hydraulic spindle , comprising:a generic hydraulic switching structure electively configurable in each of a plurality of specific hydraulic switching structures, each of the plurality of specific hydraulic switching structures having a respective hydraulic cylinder with a number of piston areas which differs from a number of piston areas in the respective hydraulic cylinders of each of the other of the plurality of specific hydraulic switching structures.2. The control block as claimed in claim 1 , further comprising:a releasably arrangeable closure means configured to electively close at least a portion of a flow path configured in the control block, thereby electively configuring the generic hydraulic switching structure in one of the plurality of specific hydraulic switching structures.3. The control block as claimed in claim 2 , wherein the closure means is releasably arrangeable from outside the control block.4. The control block as claimed in claim 1 , further comprising:a first and a second supply interface, wherein the first supply interface is configured to be electively fluidically connected to at least one of a high-pressure side of a hydraulic machine of the spindle and a low-pressure side of the hydraulic machine, and the second supply interface is configured ...

APPARATUS AND METHOD FOR ACTIVE VEHICLE SUSPENSION

Method and apparatus for improving the performance, response, and durability of an electro-hydraulic active suspension system. The noise caused by hydraulic flow ripple is reduced and system response is improved. 119-. (canceled)20. A method of noise mitigation for an active suspension system of a vehicle , the method comprising:(a) obtaining, via one or more sensors on the vehicle, noise data or vibration data;(b) obtaining operating parameters of a hydraulic motor-pump of the active suspension system;(c) determining, based on the operating parameters of the hydraulic motor-pump and at least one of the noise data or vibration data, a noise-cancelling audible sound to be provided by a speaker; and(d) operating the speaker to produce the noise-cancelling audible sound.21. The method of claim 20 , further comprising attenuating noise in the vehicle using active or passive vibration dampers.22. The method of claim 20 , wherein the operating parameters of the hydraulic motor-pump comprise an instantaneous torque produced or absorbed by the hydraulic motor pump.23. The method of claim 20 , wherein the operating parameters of the hydraulic motor-pump comprise an angular speed or position of the hydraulic motor-pump.24. The method of claim 20 , wherein the operating parameters of the hydraulic motor-pump are used in conjunction with a transfer function of a body of the vehicle to determine the noise-cancelling audible sound for the speaker.25. The method of claim 20 , wherein the one or more sensors comprises one or more microphones.26. The method of claim 20 , wherein the one or more sensors comprises an accelerometer.27. The method of claim 20 , wherein the hydraulic motor-pump comprises a gerotor.28. A noise mitigation system for a vehicle claim 20 , the system comprising:an active suspension system comprising a hydraulic motor-pump, the hydraulic motor pump having one or more operating parameters;one or more sensors configured to sense at least one of noise or ...

CONSTRUCTION MACHINE AND CONTROLLER

A construction machine having an actuator that is driven by a working fluid includes a state value detection unit that detects a state value indicating an operating condition of the actuator, a mode determination unit that determines an operating mode by comparing the state value with a determination condition value, and a condition value setting unit that modifies the determination condition value on the basis of a comparison result of the mode determination unit. The condition value setting unit sets the determination condition value such that the determination condition value is increased when the state value falls below the determination condition value and decreased when the state value rises above the determination condition value. 1. A construction machine having an actuator that is driven by a working fluid , comprising:a state value detection unit that detects a state value indicating an operating condition of the actuator;a mode determination unit that determines an operating mode by comparing the state value with a determination condition value; anda condition value setting unit that modifies the determination condition value on the basis of a comparison result of the mode determination unit,wherein the condition value setting unit sets the determination condition value such that the determination condition value is increased when the state value falls below the determination condition value and decreased when the state value rises above the determination condition value.2. The construction machine as defined in claim 1 , wherein the condition value setting unit is configured to set a first threshold or a second threshold that is higher than the first threshold as the determination condition value on the basis of the comparison result of the mode determination unit claim 1 ,whereby, in a case where the first threshold is set as the determination condition value, the condition value setting unit modifies the determination condition value to the second ...

ANTI-FREEZE DISTRIBUTION SYSTEM

A method and system for providing radiant heat to prevent freezing, which may include an emission-free, compressed-gas motor for driving a pump for pressurizing a liquid in a closed fluid pathway. The motor may include an inlet port and an exhaust port. The inlet port may be connected to a pressurized natural gas line. The exhaust port of the motor may also be connected to the natural gas line so that natural gas is lost during operation of the motor. A burner may heat the liquid in the closed fluid pathway using natural gas from the natural gas line. The heated liquid in the closed fluid pathway may provide radiant heat at desired locations, including other pipes and storage tanks. The motor may also be used for dehydrating natural gas. 1. An apparatus for producing mechanical energy from a pressurized gas stream transported in a main gas line:a compressed-gas powered motor having a motor housing with a gas inlet port and a gas exhaust port;a gas passageway in the motor housing, the gas passageway extending between the gas inlet port and the gas exhaust port;a gas feed line connected to the main gas line and the gas inlet port of the motor housing; anda gas return line connected to the main gas line and the gas exhaust port of the motor housing.2. The apparatus of claim 1 , wherein said compressed-gas powered motor further comprises a shaft movably mounted to the housing and a surface coupled to the shaft claim 1 , and wherein a portion of the pressured gas stream diverted from the main gas line and into the gas passageway in the motor housing performs work on the surface to move the shaft.3. The apparatus of claim 1 , further comprising a pressure reducer disposed in said main gas line between a connection to the gas feed line and a connection to the gas return line.4. The apparatus of claim 3 , wherein the pressure reducer forms a pressure differential in the main gas line of about 15 to 90 pounds per square inch.5. The apparatus of claim 4 , wherein the pressure ...

DEPTH COMPENSATED ACTUATOR AND USE OF SAME IN ASSOCIATION WITH A TRANSPORTABLE HEAVE COMPENSATOR

The publication relates to a depth compensated actuator, for a transportable inline depth compensated heave com-pensator for subsea lifting operations. The actuator comprises a cylinder shaped body and a piston with a piston rod, the piston rod being intended for exposure to external water pressure, a first and second connection means associated with the actuator. Further, the actuator comprises a depth compensator comprising a cylinder, a piston and a piston rod, the end of which being exposed to surrounding water; and conduit means between at least one volume in the actuator and one volume in the depth compensator. The pistons and piston rods are shaped as any of: hollow piston rod, ring shaped piston, ring piston rod. The depth compensated actuator solves the problem if improving depth compensation performance regarding size, weight, required fluid consumption, internal/inherent friction and adaptability. Further, use of a depth compensated actuator is claimed. 1. A depth compensated actuator , suitable to form a part for example of a transportable inline depth compensated heave compensator for subsea lifting or loading operations , comprising an actuator comprising a cylinder shaped body and a piston with a piston rod , able to reciprocate inside the cylinder shaped body , a first and second connection means associated with the actuator the actuator also comprises volumes intended to contain a gas or a liquid , and where tail surface associated with the piston rod is intended to be exposed to external water pressure; a depth compensator comprising a cylinder , a piston and a piston rod extending out through an end closure of the depth compensator , the end of which being exposed to a surrounding water; and conduit means between at least one volume in the actuator and one volume in the depth compensator , an actuator with a hollow piston rod configuration and a depth compensator chosen from the group of: depth compensator with a hollow piston rod; compensator ...