УПРАВЛЯЮЩИЙ КЛАПАН, УДАРНОЕ УСТРОЙСТВО И СПОСОБ УПРАВЛЕНИЯ ЦИКЛОМ РАБОТЫ УДАРНОГО УСТРОЙСТВА

FIELD: technological processes. SUBSTANCE: control valve for impactor operation cycle control includes a case with an area, at least two high-pressure medium channels connected to the case area, control element, at least first high-pressure working area and at least second high-pressure working area. Control element is mounted in the case area and can move forth and back in the first and second directions, and is intended for closing and opening high-pressure medium channels. Control element can move from middle position to the first extreme position in the first direction. Second high-pressure working area is formed on the condition of closed high-pressure area forming, and therefore, by control element movement from middle position to the second extreme position in the second direction. First high-pressure working area is formed on the condition of closed high-pressure area forming. EFFECT: simplified control valve construction and impactor operation cycle control. 18 cl, 6 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 334 610 (13) C2 (51) ÌÏÊ B25D 9/16 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2005129334/02, 23.02.2004 (72) Àâòîð(û): ÊÎÑÊÈÌßÊÈ Àíòòè (FI), ÊÅÑÊÈÍÈÂÀ Ìàðêêó (FI), ÌßÊÈ Éîðìà (FI), ÀÕÎËÀ Ýðêêè (FI) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 23.02.2004 (73) Ïàòåíòîîáëàäàòåëü(è): ÑÀÍÄÂÈÊ ÒÀÌÐÎÊ ÎÉ (FI) (43) Äàòà ïóáëèêàöèè çà âêè: 10.02.2006 R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 21.02.2003 FI 20030263 (45) Îïóáëèêîâàíî: 27.09.2008 Áþë. ¹ 27 2 3 3 4 6 1 0 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: RU 2167990 C2, 27.05.2001. SU 1293328 A1, 28.02.1987. SU 212915 A1, 01.01.1968. SU 519535 A1, 30.06.1976. US 3425498 A, 04.02.1969. EP 0578623 A1, 12.01.1994. (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 21.09.2005 2 3 3 4 6 1 0 R U (87) Ïóáëèêàöè PCT: WO 2004/073930 A1 (02.09.2004) C 2 C 2 (86) Çà âêà PCT: FI 2004/000079 (23.02.2004) Àäðåñ äë ...

УПРАВЛЯЮЩИЙ КЛАПАН, УДАРНОЕ УСТРОЙСТВО И СПОСОБ УПРАВЛЕНИЯ ЦИКЛОМ РАБОТЫ УДАРНОГО УСТРОЙСТВА

... 1. Управляющий клапан для управления циклом работы ударного устройства, содержащий корпус (3), включающий область (4), по меньшей мере, два канала (73, 74, 7b) среды повышенного давления, соединенных с областью (4), управляющий элемент (5), который установлен в области (4) в корпусе (3), который перемещается назад и вперед в первом направлении (А) и во втором направлении (В), и который дополнительно приспособлен для открытия и закрытия каналов среды повышенного давления, когда управляющий элемент (5) перемещается назад и вперед согласно его циклу работы, по меньшей мере, первую рабочую область (61) повышенного давления и, по меньшей мере, вторую рабочую область (63) повышенного давления, первый управляющий канал (66) повышенного давления для подачи среды повышенного давления в первую рабочую область (61) повышенного давления, когда управляющий элемент (5) меняет свое направление, второй управляющий канал (67) повышенного давления для подачи среды повышенного давления во вторую рабочую область ...

Пусковое устройство

ПУСКОВОЕ УСТРОЙСТВО, имеюш ,ее корпус с золотниковой камерой и размещенным в нем золотником, подпружиненным в осевом направлении и перекрывающим подводящую и отводящую магистрали , и узел управления золотником, включающий шток с кнопкой управления на одном его конце, отличающееся тем, что, с целью обеспечения удобства при эксплуатации, в золотнике выполнен осевой канал, в котором с возможностью перемещения установлен шток, по крайней мере, с двумя лысками , попеременно сообщающий золотниковую камеру с подводящей магистралью или атмосферой.

Гидропневматическое устройство ударного действия

Selbsttaetiger Abstellschieber fuer Druckluftwerkzeuge, insbesondere Drucklufthaemmer

Rohrschiebersteuerung

Improvements in valve apparatus for rock drills and other fluid pressure operated tools

SINGLE STROKE PERCUSSION DEVICE

A HYDRAULIC PERCUSSIVE DRILL

Improvements in or relating to rock drills and like tools

... 328,235. Holman, J. L., and Holman, A. T. Jan. 22, 1929. Percussive drills.-In a distributing valve for a rock drill &c. of the type wherein a piston 11 operates on a twist bar 12 within a cylinder 10, the valve gear is situated around the twist bar in front of the ratchet gear and consists of a sleeve 20 containing ports, a valve chest 14, and a reciprocating annular " hat-shaped " valve 16. The working fluid passes through ports 23 and 24 to the annular space 26 on the rear side of the brim of the valve, and ports 25 and 27 to the front side of the brim of the valve. In the position shown the space 26 is in communication with ports 28 and 30 to the front side of the piston. During the motion of the piston the port 37 is uncovered communicating the front side of the piston to atmosphere and at this point the greater force on the front side of the brim of the valve moves it and places the rear side of the piston in communication with the working fluid through ports 27, 29 and 31. The annular ...

SINGLE-STROKE PERCUSSION DEVICE

Improvements in, and relating to, valve apparatus for rock drills and like fluid pressure operated tools

... 356,437. Valve gear for rock-drills and percussive tools. RAYNER, G. H. T., 14, Broomhall Road, and RAYNER, P. T., 37, Ashland Road, both in Sheffield. Aug. 16, 1930, No. 24610. [Class 122 (ii).] In a gear of the kind described in Specification 356,421, ports 19 for continually exhausting fluid from the ends of the valve chamber are arranged in the end collars of the valve, the fluid passing therethrough to the exhaust ports 11, 12. The cylinder grooves associated with the ports 13, 14 described in the prior case are dispensed with.

Distributing valve for rock drills or like percussive tools

... 597,920. Valve gear for percussive tools. CHICAGO PNEUMATIC TOOL CO. Sept. 24, 1945, No. 24677. Convention date, Oct. 3, 1944. [Class 122 (ii)] A distributing valve 39 for a percussive tool is of annular form and is mounted in a valve chest and surrounds a bush 31 through which the rifle bar 28 passes. As shown, motive fluid passes through valve 42, ratchet ring 27 and the bore of the valve to the cylinder 12 and maintains the valve open by acting on the end face 53. The piston 11 is moved forward and the other end of the cylinder exhausts through groove 59 in the valve until the port 68 is uncovered to admit pressure fluid to act on the face 72 of a collar 57 on the valve to close the admission and exhaust ports and open admission to the other end of the cylinder by the end 56 uncovering the port 65. The valve is held in this position by the pressure of the motive fluid acting on the end 56 in opposition to that acting on the face 54 provided in the bore 55. The compression in the cylinder ...

Improvements in distributing valves and valve gear for rock drills

... 468,132. Rock - drill valves and valve gear. INGERSOLL-RAND CO. March 25, 1937, No. 8847. Convention date, April 2, 1936. [Class 122 (ii)] In a fluid-actuated rock drill, the distribution is effected by a sleeve, slide valve which reciprocates on an internal, guiding-member. The ends of the valve control the admission ; fluid-pressure acting on the ends of the valve and on a central, external flange effects reversal; an auxiliary exhaust from both cylinder ends is effected by passages controlled by an inner recess in the valve. The drill has a differential piston 23 controlling a main exhaust 24. The valve-chest 28 comprises plates 29, 30, 31, 32 which include a chamber 33 bounded internally by an extension 34 on the plate 29 and housing a sleeve valve 35. Fluid pressure is supplied by a passage 38 through passages 39, 40 to the valve chamber and passes by passages 36, 37 to the cylinder ends when the valve reciprocates. The valve has an exterior flange 43 with actuating-areas 44, 45 alternately ...

Recoilless hammer

Recoilless hammer

Recoilless hammer

PRINTING RULE DEVICE FOR A HYDRAULIC SCHLAGVORRICHTUNG

HYDRAULIC SCHLAGVORRICHTUNG

PNEUMATISCH ANGETRIEBENER, EINZELSCHLAEGE AUSFUEHRENDER HAMMER

SCHLAGAPPARAT, WELCHER VON EINER DRUCKFLUESSIGKEIT GETRIEBEN IST

HYDRAULIC MECHANICAL PICK

COMPRESSED AIR IMPACT DEVICE WITH VARIABLE CONTROL

HYDRAULIC SCHLAGVORRICHTUNG

CONTROL VALVE FOR MOVING BACK AND FORTH PISTONS OF A HYDRAULIC SCHLAGVORRICHTUNG, IN PARTICULAR FOR A HYDRAULIC HAMMER.

PNEUMATIC PERCUSSIVE TOOL.

PERCUSSIVE TOOL

FLUID-CLAIMANT RAMMER

PERCUSSION DEVICE

Control valve and a method of a percussion device comprising two parallel inlet channels

Percussion device

Rock percussion mechanism

HAMMER

DEVICE FOR GENERATING A RECIPROCATING MOVEMENT, VALVE ARRANGEMENT THEREFORE AND PNEUMATIC TOOL

A pressure-fluid driven device for generating a reciprocating movement includes a first (5) and a second relatively movable part (3), wherein a working chamber (7) is intended to be alternatively pressurised and depressurised so as to drive the parts in a movement relative to each other when the working chamber is pressurised. A valve arrangement (8) is intended to control the fluid flow into as well as from the working chamber. The inlet into the working chamber (7) is separate from the discharge from the working chamber (7). The invention also concerns a valve arrangement and a pneumatic tool.

SLIDE VALVE, PERCUSSION DEVICE & METHOD

Slide valve (16) for a hydraulic percussion device (10), which slide valve (16) comprises a transition surface (18) that is ananged to alternately be subjected to a working pressure (20) and a tank pressure (22) to caffy out a reciprocating movement when the percussion device (10) is in use. The slide valve (16) comprises at least one channel (24) which is open at one end (24a) of the slide valve (16), and at least one displaceable pin (26) that is arranged inside said at least one channel (24).

SLIDE VALVE, PERCUSSION DEVICE & METHOD

Slide valve (16) for a hydraulic percussion device (10), which slide valve (16) comprises a transition surface (18) that is arranged to alternately be subjected to a working pressure (20) and a tank pressure (22) to carry out a reciprocating movement when the percussion device (10) is in use. The slide valve (16) comprises at least one channel (24) which is open at one end (24a) of the slide valve (16), and at least one displaceable pin (26) that is arranged inside said at least one channel (24).

PERCUSSION MOVEMENT APPARATUS

In order to maximize percussion force and reduce the number of components and weight by installing a valve between a piston and a cylinder, the invention provides a percussion movement apparatus which comprises a valve installed between the piston and the cylinder, the valve being constructed to open/close a flow path and organically cooperate with the piston by predetermined movements thereof, the valve having substantially cylindrical overall shape whose both end surfaces which is upper and lower end surfaces thereof with different cross sectional areas, and also the valve including a longitudinal piston hole with multistage sills, a plurality of holes extending rectangularly to the piston hole for communicating the piston hole with exterior, and an annular projection with front and rear peripheral surfaces partially formed on a peripheral surface of the valve, the cylinder being mounted the outside of the valve and including a plurality of cylinder holes for reciprocating the piston; ...

Appareil pour la fabrication d'un fil textile imprégné à coeur avec une substance propre à unir les fibres les unes aux autres.

Pressluftschlagwerkzeug mit Schieber-Steuerung.

Appareil à percussions

[...] A [...][...].

PNEUMATIC PERCUSSIVE TOOL.

Sleeve/bushing assembly and use of the sleeve/bushing assembly the hydrohammer

Improvements in the air powered tools

HYDRAULIC APPARATUS HAS PERCUSSIONS

Distribution with valve for compressed-air tools, hammer drills, etc

Tool with percussion

OUTIL A PERCUSSION

Outil à percussion. Il comporte un cylindre 1, une gaine 2 montée sur celui-ci, un piston 5 monté dans la gaine de manière à effectuer un mouvement de va-et-vient sous l'effet d'un gaz et d'une pression hydraulique, et une soupape tubulaire 7, montée de façon coulissante sur la gaine pour commander un circuit hydraulique ; la soupape est relevée et abaissée hydrauliquement sans l'aide d'un ressort et il n'y a pas d'accumulateur de gaz. Application à un excavateur.

HYDRAULIC APPARATUS HAS PERCUSSIONS

Pneumatic vibrating hammer for motor vehicle, has pneumatic shoe undergoing alternating movement at specified frequency range, skirt regulating alternative movement of cylinder, and dampers changing piston movement

Dispositif pour la pose des joints de porte ou autre. L'invention concerne un dispositif permettant la pose aisée des joints par l'utilisation d'un sabot adapté (rep8) mis en mouvement alternatif à des fréquences de 60 à 150Hz et de courses de 0.5 à 6mm.Il est constitué d'un ensemble de pièces rep1 à rep7. La jupe (rep4) permet d'augmenter la puissance par réduction des fuites d'air et des vibrations par frottement contrôlé sur le cylindre (rep2). La mise en place d'éléments amortisseurs (rep5)modifie la course et la fréquence du piston.

Method for adjusting the strike stroke of a percussion piston of an impact device and impact device for carrying out said method

HYDRAULISK SLAGAPPARAT

HYDRAULIC HAMMER HAVING IMPACT SYSTEM SUBASSEMBLY

An impact system (70) for a hydraulic hammer (20) is disclosed. The impact system includes a piston (80), a sleeve (100) disposed co¬ axial with the piston, and an accumulator membrane (90) disposed external to the sleeve. A first seal (137) is located at an end of the sleeve, and configured to connect the sleeve to the piston. The accumulator membrane has an extension (97) configured to engage a recess (109) in the sleeve.

PNEUMATIC ASSEMBLY FOR AN INSTALLATION THAT IS USED FOR THE BLAST CLEANING OF FOUNDRY CORES

The invention relates to a device for the blast cleaning of foundry cores. The inventive device consists of: a shaft (1) comprising first compressed air inlet means (20) and pulsed air outlet means (25); an approach cylinder (3) which slides inside the shaft, under the action of the compressed air, between a retracted position and a working position in which a punch (5) is in contact with a workpiece; and striking means (50) which subject the punch to repeated impacts. The device also comprises: means (219) for sealing the air outlet means, which can inhibit the striking means as the approach cylinder moves from the retracted position to the working position thereof; and timing means (225) for opening the sealing means at the end of a pre-determined period of time following a determined event.

PRESSURE REGULATING DEVICE FOR A PERCUSSIVE HYDRAULIC APPARATUS

A percussive apparatus comprises a body (2) inside of which a striking piston (4) is mounted in a cylinder bore (3). Two axially offset pieces (17, 18) are mounted inside the cylinder bore (3) of the body while being concentric to the piston, and a deformable washer (19) is placed between said pieces. One of the pieces (17) is stationary with regard to the other piece (18) that, however, is mounted in a manner that enables it to slide inside the cylinder bore and to be displaced in the direction of the stationary piece while being subjected to the action of the supply pressure of the hydraulic fluid that acts upon the surface of the moving piece (18) facing away from the side opposite the stationary piece (17). This displacement of the moving piece (18) causes the elastic washer (19) to deform in order to create a passage with a variable cross-section on the return circuit (15) of the hydraulic fluid to the reservoir or on a circuit that diverts, to the return circuit, a portion of the ...

CONTROL VALVE IN A PERCUSSION DEVICE AND A METHOD COMPRISING A CLOSED PRESSURE SPACE AT THE END POSITION OF THE PISTON

The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. The percussion device (1) used for breaking rock comprises an impact element (8), which is controlled by a control valve (2). The control valve comprises a control element (5), which is arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The movement of the control element to its extreme position is arranged to form a closed pressure space, where pressure medium compresses and converts kinetic energy of the control element into pressure energy. The pressure energy is re-converted into kinetic energy and utilized when the control element changes its direction.

HYDRAULIC PERCUSSION APPARATUS

The invention concerns an apparatus comprising a body (1) wherein is mounted a cylinder (2) inside which an impact piston (22) is guided, the fluid distribution providing the motion of the piston (22) being produced by a distributor (23) housed in a distribution box (3) mounted in the body. The cylinder (2) and the distribution box (3) are entirely contained in the enclosure defined by the body (1), the cylinder (2) is mechanically supported by one of its ends on the body (1), the distribution box (3) is mounted coaxial to the cylinder and is mechanically supported thereon and the surfaces perpendicular to the axis of the apparatus, subjected to pressure, are arranged and dimensioned such that the resultant of the hydraulic forces applied on the parts, cylinder (2), distribution box (3) are directed in the same direction towards a support located in the body of the apparatus, during all the phases of the operating cycle thereof.

Valve for rock drills

OLEODYNAMIC PERCUSSION MACHINE WITH ON-OFF SLIDE VALVE AND PILOT PISTON

PERCUSSION APPARATUS

Hydraulic impact tool

УСТРОЙСТВО ДЛЯ СОЗДАНИЯ ВОЗВРАТНО-ПОСТУПАТЕЛЬНОГОДВИЖЕНИЯ, КЛАПАННЫЙ БЛОК ДЛЯ НЕГО И ПНЕВМАТИЧЕСКИЙ ИНСТРУМЕНТ

Изобретение относится к пневматическим инструментам, содержащим устройство для создания возвратно-поступательного движения, приводимого в действие сжатой текучей средой. Устройство для создания возвратно-поступательного движения содержит первую и вторую части, рабочую камеру и клапанный блок. Первая и вторая части устройства выполнены с возможностью перемещения друг относительно друга в осевом направлении. Рабочая камера выполнена с возможностью повышения в ней давления для перемещения указанных первой и второй частей устройства друг относительно друга или снижения в ней давления. Первая часть устройства имеет первый канал для подачи рабочей текучей среды в рабочую камеру. Вторая часть устройства имеет второй канал для выпуска текучей среды из рабочей камеры. Клапанный блок содержит клапанные затворы, установленные с возможностью перемещения относительно первой и второй частей устройства, и средства управления, присоединенные по меньшей мере к одному из двух клапанных затворов. Клапанные затворы отделены друг от друга в осевом направлении для обеспечения отделения входа текучей среды в рабочую камеру из первого канала от выхода текучей среды из рабочей камеры во второй канал. При этом клапанный блок обеспечивает управление потоком текучей среды в первом и втором каналах в зависимости от относительного положения первой и второй частей устройства, а также управление повышением давления в рабочей камере. В результате повышается эффективность работы, уменьшаются габариты устройства, обеспечивается простота и дешевизна его изготовления. 2 н. и 11 з.п. ф-лы, 5 ил. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 317 191 (13) C2 (51) ÌÏÊ B25D 9/20 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2004128390/02, 01.03.2003 (72) Àâòîð(û): ÒÎÐÍÎÊÂÈÑÒ Ïèòåð (SE) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 01.03.2003 (73) Ïàòåíòîîáëàäàòåëü(è): ÀéÏèÒè Òåêíîëîäæèñ ÀÁ (SE) R U (30) Êîíâåíöèîííûé ...

РЕГУЛИРУЮЩИЙ КЛАПАН И СПОСОБ ДЛЯ УДАРНОГО УСТРОЙСТВА С РАБОЧИМ ЦИКЛОМ, СОДЕРЖАЩИМ НЕСКОЛЬКО МОМЕНТОВ СОЕДИНЕНИЯ

Группа изобретений относится к ударным устройствам для разрушения горных пород, а именно к регулирующему клапану ударного устройства, ударному устройству и способу регулирования рабочего цикла ударного устройства. Технической задачей является увеличение частоты ударов ударного устройства. Достигается тем, что ударное устройство для разрушения горной породы содержит ударный элемент, управляемый регулирующим клапаном, содержащим регулирующий элемент, приспособленный для регулирования каналов, ведущих к рабочей напорной поверхности ударного элемента, при этом рабочий цикл регулирующего клапана содержит несколько моментов соединения для того, чтобы открывать и закрывать каналы для рабочей среды под давлением, создавая в ударном устройстве несколько ударных импульсов за один рабочий цикл регулирующего клапана. 3 н. и 22 з.п. ф-лы, 9 ил. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 304 217 (13) C2 (51) ÌÏÊ E21C 37/00 (2006.01) E21B 1/26 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2005129335/03, 23.02.2004 (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 23.02.2004 (30) Êîíâåíöèîííûé ïðèîðèòåò: 21.02.2003 (ïï.1-25) FI 20030263 (43) Äàòà ïóáëèêàöèè çà âêè: 27.03.2006 (73) Ïàòåíòîîáëàäàòåëü(è): ÑÀÍÄÂÈÊ ÒÀÌÐÎÊ ÎÉ (FI) (45) Îïóáëèêîâàíî: 10.08.2007 Áþë. ¹ 22 2 3 0 4 2 1 7 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: RU 2104148 C1, 10.02.1998. SU 337506 A, 05.05.1972. SU 673193 À, 05.07.1979. SU 683894 À, 05.09.0979. SU 810952 À, 07.03.0981. RU 2027937 C1, 27.01.1995. RU 2042812 C1, 27.08.1995. RU 2095566 C1, 10.11.1997. RU 2107817 C1, 27.03.1998. RU 2117759 C1, 20.08.1998. SE 373774 C, 17.02.1975. 2 3 0 4 2 1 7 R U C 2 C 2 (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 21.09.2005 (86) Çà âêà PCT: FI 2004/000081 (23.02.2004) (87) Ïóáëèêàöè PCT: WO 2004/073932 (02.09.2004) Àäðåñ äë ïåðåïèñêè: 129010, Ìîñêâà, óë. Á.Ñïàññêà , 25, ñòð.3, ÎÎÎ "Þðèäè÷åñêà ôèðìà Ãîðîäèññêèé è ...

ГИДРОПНЕВМАТИЧЕСКОЕ УСТРОЙСТВО УДАРНОГО ДЕЙСТВИЯ

Изобретение относится к гидропневматическим устройствам ударного действия, предназначенным для ударного разрушения горных пород и искусственных материалов. Гидропневматическое устройство ударного действия содержит пику, рукоятку с пневмоаккумулятором, корпус, в камерах которого расположен с возможностью перемещения поршень-боек, напорную магистраль и сливную магистраль, причем корпус снабжен передней опорой с проставкой, закрепленной на корпусе со стороны пики винтами, и задней опорой, закрепленной на корпусе со стороны рукоятки крепежной шайбой, устройство снабжено элементом управления, выполненным в виде гильзы управления, размещенной внутри корпуса и имеющей отверстия подвода рабочей жидкости, и клапаном, выполненным с кольцевыми проточками и отверстиями для подвода рабочей жидкости, размещенным внутри гильзы управления и снабженным гидравлической пружиной, при этом в клапане размещена гайка регулировочная для регулировки хода клапана. Техническим результатом является упрощение конструкции ...

Пусковое устройство пневматических машин

ПУСКОВОЕ УСТРОЙСТВО ПНЕВМАТИЧЕСКИХ МАШИН, содержащее корпус с подводящим и отводящим каналами и золотниковой камерой с размещенньм в ней узлом управления, золотник, имекщий продольное отверстие и делящий золотниковую камеру на основную полость, сообщающую подводящий и отводящий каналы, и дополнительную полость, и уплотнительную прокладку , отличающееся тем, что, с целью повышениянадежности в работе, золотник жестко связан с узлом управления, в последнем выполнен канал, сообщающий дополнительную полость с продольным отверстием , в теле корпуса, на части длины основной полости, вьшолнена проточка , а уплотнительная прокладка закреплена на золотнике и попеременно взаимодействует с торцом проточки .

Пневматическая машина ударного действия

Пусковое устройство к пневматическимРучНыМ МАшиНАМ

Устройство ударного действия

Пневматическое устройство ударного действия для образования скважины в грунте

Пусковое устройство пневматических машин

Изобретение относится, к пусковым устройствам пневматических машин. Цель изобретения - улучшение условий эксплуатации путем плавного регулирования подачи воздуха. Конец золотника 5 выполнен в виде поршня 7 с торцом, образующим с корпусом 1 камеру 8 для заполнения жидкостью. В уст ройстве имеется узел 9 управления, который выполнен со штоком 10 и поршнем 11, размещенными в камере 8 для. заполнения жидкостью. Диаметр поршня 11 меньше диаметра поршня 7 золотника 5. Это приведет к тому, что при перемещении штока 10 узла 9 управления на некоторый линейный размер клапан 6 будет перемещаться на меньший размер. Последнее приведет к плавному регулированию подачи воздуха.1:ил.

Пусковое устройство

ПУСКОВОЕ УСТРОЙСТВО, содержащее корпус, имеющий золотниковую камеру, размещенный в ней золотник, подпружиненный в осевом направлении и перекрывающий подводяо ую и отводящую магистрали, и узел управления / .f. It I li ,- f: IQ , .Г :.-.v.,, iSi , золотником, отличающееся тем, что, с целью обеспечения удобства эксплуатации, узел управления выполнен или в виде ступенчатого золотника и одним концом шарнирно установленного на корпусе рычага, другим концом взаимодействующего со ступенчатым золотником, установленным в канале, выполненном в корпусе и соединяющим золотниковую камеру или с атмосферой или с подводящей магистралью, или в виде охватывающей корпус подпружиненной в осевом направлении втулки с проточками на внутренней поверхности, сообщающими соответственно через канал в сл корпусе золотниковую камеру с атмосферой или с подводящей магистралью. 4 4 00 vj со ...

Pressluftschlagwerkzeug mit Rohrschiebersteuervorrichtung

A compressed air hammer for riveting, chipping, and like operations

... 220,305. Eloy, F. Aug. 7, 1923, [Convention date]. Fluid-actuated gears. -In a hand-supported percussive tool for riveting, chipping, &c., the power fluid is distributed by a sleeve valve arranged between the piston and the cylinder, which valve is provided with a single circumferential projection to control the forward supply. Fluid entering the supply duct hand ports m fills the cylinder, and passing up port l throws the valve f upward, the upper annular valve surface being open to exhaust through ports k<1>. The cylinder then exhausts through ports j, and compressed-air passes to the forward end of the cylinder to raise the hammer c through passages h, p, n, k. When the ports j are closed by the piston, the compression throws the valve downward, closing ports and putting the upper end of the cylinder to supply to drive the piston down, and the lower end of the cylinder to exhaust through passages k, k'.

Improvements relating to pneumatic percussive tools

... 433,374. Percussive tools. CLIMAX ROCK - DRILL & ENGINEERING WORKS, Ltd., 4, Broad Street Place, Blomfield Street, London, and ST. STEPHENS, R. DE H., Homefield, Camborne, Cornwall. Feb. 8, 1934, No. 4248. [Class 124] [See also Group XXVI] A differential sleeve valve with an external shoulder is arranged to the rear of and co-axially with the cylinder. Its ends and interior are open to the rear of the cylinder the fluid supply to which and an auxiliary exhaust therefrom being controlled by the forward enlarged end of the valve. The fluid-supply to the forward end of the cylinder and an auxiliary therefrom are controlled by a recess around the rear end of the valve. Fluid from the cylinder acts on the shoulder to throw the valve forward, and compression reverses it. A valve to blow out the debris is provided. The distributing valve shoulder 26 constantly communicates with the exhaust through a passage 34, and is put into communication with the cylinder through a passage 30 which is opened ...

Improvement in rock drills

... 272,759. Marks, E. C. R., (Ingersoll- Rand Co.). Nov. 8, 1926. Percussive drills. - The valve chest of a hammer stopping drill, arranged at the rear end of the cylinder, is formed by the back head G and cover block H and is provided with a central tube O on which the valve slides. The tube fits water tight at its ends into walls of the valve chest, and forms a guide for the water tube F, if used. If no water tube be used the tube is made solid, or plugged. The valve P puts each end of the cylinder alternately into communication with a central inlet port d and an exhaust port S, and is reversed by fluid from the cylinder passing by way of ports a, b in the cylinder wall to the ends of the valve so as to move it against the pressure of the fluid holding the valve and acting on the central head W<1>.

CONCRETE AND ROCK BREAKING HAMMERS

HYDRAULIC IMPACT TOOL

VARIABLE FREQUENCY HYDRAULICALLY RECIPROCATED IMPACT TOOL

Improvements in, and relating to, fluid pressure operated percussive tools

... 412,431. Valve-gear for percussive tools. HARDYPICK, Ltd., and RAYNER, P. T., Mining Engineering Works, Heeley, Sheffield. July 29, 1933, No. 21396. [Class 122 (ii).] A percussive tool is provided with a differential sleeve valve e which is moved in one direction by compression and in part in the other direction by main pressure fluid acting constantly upon a valve area, and in part by reduced pressure fluid acting upon an area which is periodically put to exhaust by a piston controlled passage. The head f of the tool accommodates a trigger g for actuating a supply valve h. The fluid passes to the cylinder through a duct k and radial ports m. Fluid pressure passes to the rear of the cylinder across the end of the valve, and to the forward end of the cylinder across the outside of the valve and by passage n. The exhaust passes through central parts x. A forward auxiliary exhaust passes along passage n around the valve, and through passages z, z. The valve box is stepped at r so that the ...

HYDRAULIC PERCUSSIVE DEVICE

... 1516566 Hydraulic reciprocating motors TAMPELLA AB OY 30 Sept 1976 [20 Oct 1975] 40700/76 Heading F1A [Also in Division B4] A hydraulic percussion apparatus, eg a rock drill, comprises a body 1 to which a tool 2 can be attached, a piston 27 and a sleeve valve 34 both reciprocable in a cylinder space 8, 10, the piston having a flange 4 with a channel 43, the sleeve having an upper distributing portion 35 and a lower extension 36 (lower being closest to tool 2), the external diameter of sleeve extension 36 being less than that of distributing portion 35 and the area of its lower end surface 39 being smaller than the area of the upper end surface 12 of distributing portion 35, a neck 38 of body 1 separating lower cylinder space 8 from a space 37 for receiving distributing portion 35 of the sleeve valve, space 37 being connected to lower cylinder space 8 via piston flange channel 43 and openings 40 in sleeve extension 36. High-pressure hydraulic fluid is supplied continuously to lower cylinder ...

HAMMER MECHANISM FOR ROCK DRILLS

DEVICE FOR THE PRODUCTION AND HERBEWUNG AND PNEUMATIC TOOLS

TOOL FOR THE DISTANCE OF LINING PINS

HANDBEDIENTE DRUCKLUFTSCHLAGMASCHINE

SCHLAGWERKZEUG

DRUCKLUFTHAMMER

IMPACT APPARATUS, WHICH FROM A HYDRAULIC FLUID TRANSMISSIONS IS

HYDRAULIC IMPACT EQUIPMENT

HYDRAULIC SCHLAGVORRICHTUNG.

HYDRAULIC FIRING MECHANISM.

Impact tool

Fluid actuated tool

Rock percussion mechanism

IMPACT TOOLS

ACTUATOR FOR A HYDRAULIC IMPACT DEVICE

A linear actuator includes a ram and a piston separated by a column of hydraulic fluid in a housing. Upward movement of the ram in the housing first seals a finite quantity of hydraulic fluid in the housing cavity. Continued upward ram movement then causes the piston, and hydraulic fluid beneath it, to move upwardly into a sealed gas chamber to compress a gas and create a source of potential energy. Release of the force moving the ram upwardly permits the compressed gas above the piston to expel the hydraulic fluid from the chamber against the ram thereby converting the potential energy in the compressed gas into kinetic energy in the ram. The hydraulic fluid bears directly against the ram to provide the working stroke of the impact device without the effect of metal fatigue from direct contact between the piston and ram. BACKGROUND OF THE INVENTION This invention relates to hydraulic hammers of a type used to break up concrete, street pavement, building walls and the like. More particularly ...

RECOILLESS HAMMER

A recoilless hammer comprising a moil supported for reciprocal movement along a hammer axis of a housing, a piston moveable within the chamber of an elongate tube extending from the rear of the housing such that it may strike the moil. In a rest position the piston is held forward against the moil by a low pressure air supply delivered from the aft end of the chamber, and the piston is retracted to a charged position at the aft end of the chamber by delivery of high pressure air to act on the fore portion of the piston. Upon actuation of a trigger mechanism, air is vented from the fore end of the chamber to atmosphere causing a pressure unbalance of low magnitude across the piston, such that it accelerates towards and strikes the moil. The chamber is of a length to enable a high energy blow with minimal piston acceleration recoil when the hammer is manually held and operated.

BREAKING DEVICE

A breaking device includes a frame, an impact device having a pressure chamber with a rear pressure chamber and a front pressure chamber. The breaking device further includes a first low pressure port at the rear pressure chamber, a first low pressure channel and a first low pressure accumulator connected to the first low pressure channel. The breaking device further includes a second low pressure port at the rear pressure chamber substantially opposite to the first low pressure port, second low pressure channel and a second low pressure accumulator connected to the second low pressure channel. The first low pressure accumulator and the second low pressure accumulator are arranged at the outer circumference of the frame of the breaking device at different positions in the axial direction of the breaking device. 1. A breaking device comprising:a frame;an impact device including a pressure chamber and a percussion piston, which is an elongated object contributing to divide the pressure chamber into a rear pressure chamber and a front pressure chamber;at least one first low pressure port in the frame at the rear pressure chamber and at least one first low pressure channel extending from the at least one first low pressure port to an outer circumference of the frame of the breaking device;at least one first low pressure accumulator connected to the at least one first low pressure channel at the outer circumference of the frame of the breaking device;at least one second low pressure port in the frame at the rear pressure chamber substantially opposite to the at least one first low pressure port;at least one second low pressure channel extending from the at least one second low pressure port to the outer circumference of the frame of the breaking device; andat least one second low pressure accumulator connected to the at least one second low pressure channel at the outer circumference of the frame of the breaking device, wherein the at least one second low pressure ...

HYDRAULIC HAMMERING DEVICE

A hydraulic hammering device that uses a scheme in which a front chamber is switched into communication with a low-pressure circuit when a piston advances, wherein occurrences of “galling” to the piston at a sliding contact portion with a front-chamber liner is reduced. The front chamber has the front-chamber liner fitted to an inner surface of a cylinder. A hydraulic chamber space communicating with the front chamber and filled with hydraulic oil is formed as a cushion chamber on the inner peripheral surface of a rear portion of the front-chamber liner. The cushion chamber has a second drain circuit (from first end face grooves to slits to second end face grooves, which is provided separately from a drain circuit that guides the hydraulic fluid passing through a liner bearing of the front-chamber liner to the low-pressure circuit. 1. A hydraulic hammering device comprising:a piston slidably fitted into a cylinder, the piston being configured to advance and retract to hammer a rod for hammering;a front chamber and a rear chamber that are defined between an outer peripheral surface of the piston and an inner peripheral surface of the cylinder and arranged separated from each other in the front and rear direction; anda switching valve mechanism configured to switch the front chamber into communication with a low pressure circuit when the piston advances and to supply and discharge hydraulic oil so that an advance and a retraction of the piston can be repeated,wherein the front chamber has a front-chamber liner that is fitted to an inner surface of the cylinder,a hydraulic chamber space is formed to the front-chamber liner as a cushion chamber, the hydraulic chamber space communicating with the front chamber to be filled with hydraulic oil, andthe cushion chamber has a second drain circuit that is formed separately from a drain circuit configured to guide hydraulic oil passing a liner bearing section of the front-chamber liner to the low pressure circuit and that ...

Automatic Lubrication System with Detune

Lubrication system includes a drive fluid valve member and a detune valve member. The drive fluid valve member is movable from a first to a second position in response to drive fluid pressure to reduce the volume of a variable volume lubricant charge chamber. The detune valve member is movable from a first to a second position in response to lubricant pressure within the lubricant charge chamber, and is adapted to permit fluid communication between inlet and bypass fluid passages in its the first position and to disengage the fluid connection in its second position.

Hammer temperature protection system and method

A hydraulic hammer including a housing, a piston arranged for reciprocating movement within the housing, a hydraulic circuit within the housing. The hydraulic circuit is configured for connection to a source of pressurized fluid. The hydraulic circuit includes an inlet passage configured to provide a hydraulic fluid to the piston, an outlet passage configured to provide a return flow path for the hydraulic fluid from the piston a bypass passage selectively connecting the inlet passage to the outlet passage and a thermostatic valve assembly configured to connect the inlet passage to the piston when the temperature of the hydraulic fluid is below a threshold temperature and connect the inlet passage to the bypass passage when the temperature of the hydraulic fluid is above the threshold temperature.

PNEUMATIC HAMMER

A pneumatic hammer has a handle, a body, a valve seat, a cylinder device, an assembling device, and a chisel. The body is transversally connected to the handle and has a chamber. The valve seat is mounted in the chamber of the body and has a rear valve, a front valve, and a valve plate disposed between the rear valve and the front valve. The cylinder device is mounted in the chamber, abuts against the valve seat, and has a cylinder barrel and a hammer. The cylinder barrel is mounted in the chamber and has a cylinder chamber. The hammer is movably disposed in the cylinder chamber. The assembling device is connected to the cylinder device, and has a mounting jacket, an engaging element, multiple positioning elements, a spring, and an engaging ring. The chisel is detachably connected to the assembling device, and is inserted into the cylinder chamber. 1. A pneumatic hammer comprising:a handle having a top; a closed end;', 'an open end opposite to the closed end of the body;', 'an external surface; and', 'a chamber formed in the body between the closed end and the open end of the body and communicating with the open end of the body;, 'a body transversally connected to the top of the handle, communicating with the handle, and having'} a rear valve;', 'a front valve connected to the rear valve; and', 'a valve plate mounted between the rear valve and the front valve;, 'a valve seat mounted in the chamber of the body adjacent to the closed end of the body and having'} a cylinder barrel mounted in the chamber via the open end of the body, abutting against the valve seat, and having a cylinder chamber axially formed in the cylinder barrel and communicating with the valve seat; and', 'a hammer axially and movably mounted in the cylinder chamber of the cylinder barrel;, 'a cylinder device mounted in the chamber of the body via the open end of the body, abutting against the valve seat, and having'} [ a rear end;', 'a front end;', 'an internal surface;', 'an assembling chamber ...

HAMMER ASSEMBLY

A hammer including a housing and a piston arranged for reciprocating movement within the housing is disclosed. The hammer further includes a head assembled on the housing and defining a chamber for holding a pressurized gas and a wall configured to abut the housing and defining a gas discharge passage extending between the chamber and the housing. A plug is positioned in the gas discharge passage and configured to move or deform under pressure of the pressurized gas in the chamber. 1. A hammer comprising:a housing;a piston arranged for reciprocating movement within the housing;a head assembled on the housing and defining a chamber for holding a pressurized gas; the head comprising a wall configured to abut the housing and defining a gas discharge passage extending between the chamber and the housing; anda plug positioned in the gas discharge passage and configured to move or deform under pressure of the pressurized gas in the chamber on separation of the head from the housing.2. The hammer of claim 1 , wherein the plug abuts the housing.3. The hammer of claim 1 , wherein the plug defines a clearance with the gas discharge passage.4. The hammer of claim 3 , wherein the plug comprises of a seal configured to engage the gas discharge passage.5. The hammer of claim 1 , wherein the head is assembled on the housing by bolts.6. The hammer of claim 1 , wherein the pressurized gas is nitrogen.7. The hammer of claim 1 , wherein the gas discharge passage has a first end exposed to the chamber and a second end having a receptacle configured to receive the plug.8. A hammer comprising:a first member and a second member configured for attachment to each other and defining a chamber for holding a pressurized gas;a gas discharge passage defined in the first member and extending between the chamber and an outside surface of the first member;a plug inserted in the gas discharge passage, the plug retained in the gas discharge passage against the pressure of the gas in the chamber by ...

HYDRAULIC HAMMER HAVING CO-AXIAL ACCUMULATOR AND PISTON

A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston. 1. A method of operating a hydraulic hammer , comprising:receiving pressurized fluid at an inlet;directing the pressurized fluid axially into an accumulator membrane;redirecting the pressurized fluid radially inward from the accumulator membrane toward a piston; andbiasing the piston upward with the pressurized fluid.2. The method of claim 1 , further including selectively blocking and passing pressurized fluid to a valve with movement of the piston.3. The method of claim 2 , further including:directing the pressurized fluid axially away from a tip of the piston to the valve; andbiasing the valve upward with the pressurized fluid.4. The method of claim 3 , further including selectively directing the pressurized fluid into a fluid chamber located axially adjacent to the valve.5. The method of claim 4 , further including biasing the piston downward claim 4 , away from the valve claim 4 , with the pressurized fluid in the fluid chamber.6. The method of claim 5 , wherein biasing the piston upward increases gas pressure within a gas chamber located axially adjacent to the fluid chamber.7. The method of claim 6 , further including biasing the piston downward and away from the valve with the pressurized gas in the gas chamber.8. The method of claim 7 , further including directing the pressurized fluid from the fluid chamber radially outward and through a plurality of outlet apertures located between the annular groove and gas chamber. This is a divisional of application Ser. No. 13/837,969, filed Mar. 15, 2013, which is incorporated herein by reference.The present disclosure is directed to a hydraulic hammer and, more particularly, to a ...

CHARGING SYSTEM FOR HYDRAULIC HAMMER

A charging system for a hydraulic hammer is disclosed. The charging system includes a charge plug. The charge plug is disposed on an opening defined in the wall housing connected to the top end of the power cell of a hammer. The charge plug is fluidly communicated to the chamber via a conduit. The charge plug includes a first compartment. The first compartment is configured to receive a first chemical substance. The charge plug also includes a second compartment. The second compartment is configured to receive a second chemical substance. The first compartment and the second compartment are covered by a membrane. A pressure difference causes collapsing of the membrane to allow the first chemical substance and the second chemical substance is allowed to react with each other. The reaction of the first chemical substance and the second chemical substance pressurizes the air within the chamber to a desired pressure. 1a wall housing connected to a top end of the power cell, and defining a chamber therein, wherein a first end of a piston slidably disposed within the power cell is received within the chamber and a second end is configured to engage with a tool, and wherein the chamber is adapted to contain pressurized air for moving the piston between a first position and a second position; and a first compartment configured to receive a first chemical substance; and', 'a second compartment disposed adjacent to the first compartment, the second compartment configured to receive a second chemical substance, wherein each of the first compartment and the second compartment is covered by a membrane,', 'wherein the piston moves from the first position to the second position during charging of the hydraulic hammer to create a pressure difference within the chamber, and wherein the pressure difference causes collapsing of the membrane to allow the first chemical substance and the second chemical substance react with each other, and wherein reaction of the first chemical ...

HAMMER HAVING PISTON SLEEVE WITH SPIRAL GROOVES

A sleeve is disclosed for use with a hammer. The sleeve may have a generally cylindrical body with a first end and a second end. The sleeve may also have a plurality of channels spiraling at least partially around the generally cylindrical body between the first and second ends. 1. A hammer sleeve , comprising:a generally cylindrical body having a first end and a second end; anda plurality of channels spiraling at least partially around the generally cylindrical body between the first and second ends.2. The hammer sleeve of claim 1 , wherein the plurality of channels include:a plurality of first channels each forming a portion of a different pressure passage;a second channel forming a portion of a drain passage; anda third channel forming a portion of a pilot signal passage.3. The hammer sleeve of claim 2 , wherein the plurality of channels further includes a fourth channel forming a portion of a shutoff passage.4. The hammer sleeve of claim 3 , wherein each of the different pressure passage claim 3 , signal passage claim 3 , and shutoff passage spirals through about 90°.5. The hammer sleeve of claim 4 , wherein the drain passage extends from the first end a greater distance toward the second end than each of the different pressure passage claim 4 , the drain passage claim 4 , and the signal passage.6. The hammer sleeve of claim 5 , wherein the drain passage spirals through about 100-360° at a location between the second end of the generally cylindrical body and each of the different pressure passage claim 5 , drain passage claim 5 , and signal passage.7. The hammer sleeve of claim 2 , wherein the plurality of first channels includes four first channels.8. The hammer sleeve of claim 2 , wherein each of the plurality of first channels has at least one of a depth and a width greater than a depth and a width of the second claim 2 , third claim 2 , and fourth channels.9. The hammer sleeve of claim 8 , wherein each of the plurality of first channels claim 8 , second ...

Pressure indicator for hydraulic hammer

A pressure indicator for a hydraulic hammer is provided. The pressure indicator includes a sleeve member configured to couple to an opening defined in a wall housing of an accumulator of the hydraulic hammer. The pressure indicator further includes a plunger slidably disposed within the sleeve member and movable between a first position and a second position with respect to the sleeve member. The plunger includes a first end disposed outside the wall housing of the accumulator. The plunger further includes a flange coupled to a second end. The pressure indicator further includes an elastic member inserted over the plunger and disposed between the wall housing of the accumulator and the flange. A position of the first end of the plunger with reference to an outer end of the sleeve member provides a visual indication of the pressure of the gas within the accumulator.

HYDRAULIC HAMMER HAVING CO-AXIAL ACCUMULATOR AND PISTON

A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston. 1. A hydraulic hammer assembly , comprising:a piston;an accumulator membrane disposed external and co-axial to the piston; anda sleeve disposed between the piston and the accumulator membrane, the sleeve having a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston.2. The hydraulic hammer of claim 1 , further including a sleeve liner disposed radially between the accumulator membrane and the sleeve.3. The hydraulic hammer of claim 2 , further including a plurality of longitudinal recesses formed within the sleeve claim 2 , wherein at least one of the plurality of longitudinal recesses fluidly connects at least one of the plurality of radial passages with the accumulator membrane.4. The hydraulic hammer of claim 3 , further including an annular groove formed at an internal surface of the sleeve claim 3 , wherein the plurality of longitudinal recesses fluidly connect the annular groove with the accumulator membrane via the plurality of radial passages.5. The hydraulic hammer of claim 4 , wherein:the piston includes an impact end; andthe annular groove is disposed between the impact end and the plurality of radial passages.6. The hydraulic hammer of claim 4 , further including a valve located at an axial end of the accumulator membrane claim 4 , wherein the plurality of longitudinal recesses connect the valve to at least one of the plurality of radial passages.7. The hydraulic hammer of claim 6 , further including:a head configured to close off an end of the sleeve; anda fluid chamber formed within the head.8. The hydraulic hammer of claim 7 , wherein the valve is located inward of the ...

HYDRAULIC HAMMER HAVING IMPACT SYSTEM SUBASSEMBLY

An impact system for a hydraulic hammer is disclosed. The impact system may include a piston, a sleeve disposed co-axial with the piston, and an accumulator membrane disposed external to the sleeve. A first seal may be located at an end of the sleeve, and configured to connect the sleeve to the piston. The accumulator membrane may have an extension configured to engage a recess in the sleeve. 1. An impact system for a hydraulic hammer , the impact system comprising:a piston;a sleeve disposed co-axial with the piston;a first seal located at an end of the sleeve and configured to connect the sleeve to the piston; andan accumulator membrane disposed external to the sleeve and having an extension configured to engage a recess in the sleeve.2. The impact system of claim 1 , wherein the first seal is configured to generate a radial force on the sleeve and the piston after assembly that secures the sleeve to the piston.3. The impact system of claim 1 , wherein the extension is co-axial with the piston and oriented inwards towards the piston.4. The impact system of claim 1 , further including:a seal carrier disposed co-axial with the piston; anda second seal configured to connect the seal carrier to the piston.5. The impact system of claim 4 , wherein the second seal is configured to generate a radial force on the seal carrier and the piston after assembly that secures the seal carrier to the piston.6. The impact system of claim 5 , further including a valve trapped within a cavity formed between the seal carrier and the piston.7. The impact system of claim 6 , wherein the valve is disposed external to the accumulator membrane.8. The impact system of claim 6 , wherein the seal carrier and the sleeve overlap each other axially to form the cavity.9. The impact system of claim 8 , wherein:the seal carrier includes a female connector; andthe sleeve includes a male connector received by the female connector.10. The impact system of claim 1 , further including a sleeve liner ...

Two-Piston Hydraulic Striking Device

Provided is a two-piston hydraulic striking device that has stable operatively. This two-piston hydraulic striking device includes two striking mechanisms for striking one transfer member. Each striking mechanism has a pressure receiving area ratio between the front and rear of a piston thereof set in such a way that the two striking mechanisms have the same cycle time. 1. A two-piston hydraulic striking device comprising:a striking mechanism configured to strike one transfer member with two pistons, whereinthe striking mechanism includes a first striking mechanism and a second striking mechanism, and the first striking mechanism and the second striking mechanism are arranged in series in front and rear direction in such a way that striking axes are coaxial with each other and the second striking mechanism is positioned on a side where the one transfer member is located,the first striking mechanism includes: a first cylinder; a first piston configured to be slidably fitted into the first cylinder in such a manner as to be able to advance and retract, the first piston having a first striking portion for striking the one transfer member at a tip portion of the first piston; and a first switching valve configured to switch advancing and retracting movements of the first piston, a second cylinder; a second piston configured to be slidably fitted into the second cylinder in such a manner as to be able to advance and retract, the second piston having a second striking portion for striking the one transfer member at a tip portion of the second piston; and', 'a second switching valve configured to switch advancing and retracting movements of the second piston,, 'the second striking mechanism includesonly either the first striking mechanism or the second striking mechanism includes a valve controller for controlling operation of both the first switching valve and the second switching valve,of the two pistons, at least the second piston is formed into a hollow shape and the ...

Valve of Pneumatic Hammer

A valve of a pneumatic hammer include a rear mechanism including two opposite inlets, a chamber member, outlets, a relief chamber communicating with the outlets, two opposite inlet channels disposed externally of the chamber member, and two first outlet tunnels disposed externally of the chamber member wherein one end of the relief chamber communicates with the first outlet tunnels, the first outlet tunnels are disposed externally of the relief chamber and pass through the rear mechanism, and the inlets communicate with the inlet channels and the outlets; a front mechanism including a chamber element communicating with the inlet channels, an axial tunnel through a center of the chamber element, and two second outlet tunnels disposed externally of the chamber element, the second outlet tunnels corresponding to and communicating with the first outlet tunnels; and a disc between the chamber member and the chamber element. 1. A valve of a pneumatic hammer , comprising:a rear mechanism including two opposite inlets, a chamber member, a plurality of outlets, a relief chamber communicating with the outlets, two opposite inlet channels disposed externally of the chamber member, and two first outlet tunnels disposed externally of the chamber member wherein one end of the relief chamber distal the chamber member communicates with the first outlet tunnels, the first outlet tunnels are disposed externally of the relief chamber and pass through the rear mechanism, and the inlets communicate with the inlet channels and the outlets;a front mechanism secured to the rear mechanism and including a chamber element on one surface corresponding to the chamber member, the chamber element communicating with the inlet channels, an axial tunnel disposed through a center of the chamber element, and two second outlet tunnels disposed externally of the chamber element, the second outlet tunnels corresponding to and communicating with the first outlet tunnels; anda disc disposed between the ...

HYDRAULIC HAMMER

A hydraulic hammer for a machine is provided. The hydraulic hammer includes a housing and a piston disposed within the housing and adapted to reciprocate along a longitudinal axis of the housing. The hydraulic hammer further includes a first chamber and a second chamber defined within the housing. The hydraulic hammer further includes a primary passage extending from an inlet and branching into a first passage and a second passage. The first passage fluidly communicates the primary passage with the first chamber and the second passage fluidly communicates the primary passage with the second chamber. The hydraulic hammer further includes a flow control device coupled to the first passage. The flow control device includes a valve element adapted to move between a first position and a second position based on an input signal indicative of a pressure of charge in the first chamber. 1. A hydraulic hammer of a machine , the hydraulic hammer comprising:a housing;a piston disposed within the housing and adapted to reciprocate along a longitudinal axis of the housing;a first chamber defined within the housing;a second chamber defined within the housing;a primary passage extending from an inlet and branching into a first passage and a second passage, the first passage fluidly communicating the primary passage with the first chamber and the second passage fluidly communicating the primary passage with the second chamber; anda flow control device coupled to the first passage, the flow control device including a valve element adapted to move between a first position and a second position based on an input signal indicative of a pressure of charge in the first chamber, wherein the valve element allows flow of charge from the primary passage to the first chamber in the first position and restricts flow of charge from the primary passage to the first chamber in the second position, allowing the first chamber to be pressurized to a first pressure equal to the input signal and the ...

Hydraulic Striking Device

Provided is a hydraulic striking device in which a reverse operation circuit and a forward operation circuit can switch connection states to a high pressure circuit and a low pressure circuit by means of an operation switching valve. Further, the hydraulic striking device is configured to be selectable between a reverse operation mode or a forward operation mode by operating the operation switching valve. A high/low pressure switching portion is provided with a shortening portion for reducing the time required for high/low pressure switching operation in piston front and rear chambers in association with retraction of a valve to be shorter than the time required for high/low pressure switching operation in the piston front and rear chambers in association with advancement of the valve.

Device In A Rock Drilling Machine And Rock Drilling Machine

A device in a hydraulic rock drilling machine () including a distribution valve () arranged in connection with the rock drilling machine for controlling hydraulic flows to different parts of the rock drilling machine, wherein the distribution valve includes a valve body (), which is arranged movable to and fro in axial directions inside a valve chamber () and wherein the valve chamber is limited in axial direction by two valve end walls (). One of the valve end walls is movable in an axial direction against an abutment () in such a way that it defines an end position for the valve body, and a pressing device () is arranged for pressing said at least one of the valve end walls against said abutment. The invention also relates to a rock drilling machine. 11777888133101110111011. . Device in respect of a hydraulic rock drilling machine () including a distribution valve ( ,′ ,″) arranged in connection with the rock drilling machine for controlling hydraulic flows to different parts of the rock drilling machine , wherein the distribution valve includes a valve body ( ,′ ,″) , which is arranged movable to and fro in axial directions inside a valve chamber ) and wherein the valve chamber is limited in axial direction by two valve end walls ( ,; ′ ,′; ″ ,″) ,wherein{'b': 12', '12, 'at least one of the valve end walls is movable in an axial direction against an abutment (,″) in such a way that it defines an end position for the valve body,'}{'b': 13', '13', '13, 'a pressing device (,′,″) is arranged for pressing said at least one of the valve end walls in a direction of the second one of said valve end walls and against said abutment, and'}{'b': 13', '13', '13, 'said pressing device (,′,″) includes an end wall piston portion arranged on said at least one of the valve end walls and being received in a cylinder portion to be pressurized in order to drive the valve end wall against said abutment during pressurizing.'}2. Device according to claim 1 , wherein the cylinder portion ...

DEVICE FOR PRESSURE MONITORING

A device for monitoring pressure within a gas space, which is filled with gas, preferably nitrogen, and/or is prestressed, of a pressure accumulator of a hydraulically driven percussive mechanism having a housing in which a piston is mounted, together with a display element which extends through the face surface of the housing, so as to be slidingly movable counter to the force of a spring, wherein the piston divides the housing into a pressure chamber and a spring chamber. The spring acts on a spring chamber-side working surface of the piston, and the pressure accumulator is at least indirectly operatively connected to the pressure chamber-side working surface of the piston, such that, in the event of a critical pressure within the pressure accumulator being undershot, the piston and the display element are displaced to such an extent that the display element protrudes out of the housing. 1. A device for monitoring a pressure within a gas space , which is filled with a gas , preferably nitrogen , and/or is prestressed , of a pressure accumulator of a hydraulically driven percussive mechanism , the device comprising:a housing in which a piston is mounted, together with a display element which extends through a face surface of the housing, so as to be slidingly movable counter to a force of a spring, wherein the piston divides the housing into a pressure chamber and a spring chamber, the spring acting on a spring chamber-side working surface, which is averted from the display element, of the piston, and the pressure accumulator is at least indirectly operatively connected to the pressure chamber-side working surface, facing toward the display element, of the piston, such that, in an event of a critical pressure within the pressure accumulator being undershot, the piston and the display element are displaced to such an extent that the display element protrudes out of the housing.2. A device according to claim 1 , wherein the display element has at least one marking ...

PRESSURE MONITORING DEVICE

A device for monitoring the pressure within a gas space, which is filled with a gas, preferably nitrogen, and/or is prestressed, of a pressure accumulator of a hydraulically driven percussive mechanism, in particular of a demolition hammer or of a drilling hammer, having a housing in which a piston is mounted, together with an indicator element which extends through the face surface of the housing, in slidingly movable fashion. The piston divides the housing into two chambers, and a first, pressure accumulator-side chamber and a pressure accumulator-side working surface, which is averted from the indicator element, of the piston are operatively connected at least indirectly to the gas space of the pressure accumulator. A second, hydraulics-side chamber and a hydraulics-side working surface, facing toward the indicator element, of the piston are connected to the hydraulic system of the percussive mechanism. 1. A device for monitoring a pressure within a gas space , which is filled with a gas , preferably nitrogen , and/or is prestressed , of a pressure accumulator of a hydraulically driven percussive mechanism , having a housing in which a piston is mounted , together with an indicator element which extends through a face surface of the housing , in slidingly movable fashion , wherein the piston divides the housing into two chambers , and a first , pressure accumulator-side chamber and a pressure accumulator-side working surface , which is averted from the indicator element , of the piston are operatively connected at least indirectly to the gas space of the pressure accumulator , the device comprising:a second, hydraulics-side chamber and a hydraulics-side working surface, facing toward the indicator element, of the piston connected to a hydraulic system of the percussive mechanism such that the indicator element, by way of a position of the indicator element, signals an undershooting of a critical pressure within the pressure accumulator if an exertion of pressure ...

METHOD FOR SETTING THE STRIKING STROKE OF A STRIKING PISTON OF A PERCUSSION APPARATUS, AND A PERCUSSION APPARATUS FOR IMPLEMENTING SAID METHOD

The percussion apparatus includes a striking piston and a piloting device configured to make a striking stroke of the striking piston vary, the piloting device comprising a piloting cylinder, a piloting slide mounted movable in translation within the piloting cylinder according to a direction of displacement and mounted movable in rotation within the piloting cylinder, and a main piloting chamber delimited by the piloting slide and the piloting cylinder. The percussion apparatus further includes a setting device configured to set a range of variation of the striking stroke of the striking piston, the setting device including a setting member configured to set the angular position of the piloting slide in the piloting cylinder, and at least one fluidic communication passage formed on the piloting slide and configured to hydraulically limit the translational displacement stroke of the piloting slide according to the direction of displacement according to the angular position occupied by the piloting slide. 1. A setting method for setting a striking stroke of a striking piston of a percussion apparatus , the setting method comprising the following steps:providing a percussion apparatus comprising a striking piston displaceable in a reciprocating manner inside a body of the percussion apparatus and configured to hit a tool at each operating cycle of the percussion apparatus, and a piloting device configured to make the striking stroke of the striking piston vary automatically according to the hardness of the ground encountered by the tool, the piloting device comprising a piloting cylinder, a piloting slide mounted movable in translation within the piloting cylinder according to a direction of displacement and configured to occupy a plurality of piloting positions shifted from one another according to the direction of displacement, and a main piloting chamber delimited by the piloting slide and the piloting cylinder,setting a range of variation of the striking stroke of ...

Slagverktyg.

Hammer device

Hammer device comprising a machine housing (1) with a hammer piston (2) movable to-and-fro. The movement to-and-fro of the hammer piston is controlled by a valve body (6) movable to-and-fro in the machine housing. In order to speed up the turning of the hammer piston at its rear end position the machine housing is provided with a room (10) which by the hammer piston is separated from connection with the valve body (6) at the same time as the rear end surface (5) is supplied with pressure fluid via a connection (11) opened by the hammer piston to the pressure source (8) when the hammer piston approaches its rear end position.

控制阀、撞击装置以及用于控制撞击装置的工作循环的方法

本发明涉及一种控制阀、撞击装置以及用于控制撞击装置的工作循环的方法。用于破碎岩石的撞击装置(1)包括冲击元件(8)，其利用控制阀(2)进行控制。该控制阀包括控制元件(5)，该控制元件设置为控制通向冲击元件(8)的工作压力表面(9)的通道(7b)。控制元件向其极限位置的运动设置为形成关闭的压力空间，其中压力介质压缩并且将控制元件的动能转化成压能。当控制元件改变其方向时该压能再次转化成动能并且加以利用。

液压式冲击装置

本发明提供一种提升冲击效率且低成本的液压式冲击装置。活塞(200)在其大径部具有阀切换槽(205)，缸体(100)在与阀切换槽(205)相对应的位置具有3个控制口(112、113、114)，切换阀机构(210)具有始终对阀(300)朝向一个方向施力的阀施力部件和在供给压力油时克服阀施力部件的作用力而使阀(300)向相反方向移动的阀控制部件。阀控制口(114)以能够向阀控制部件供给压力油的方式与该阀控制部件连通，并且与活塞前室(110)、后室(111)相互隔绝，活塞后退控制口(113)和活塞前进控制口(112)通过与阀切换槽(205)的前后移动相应地只有任一个口与阀控制口(114)连通。

Hydraulic rock breaker

FIELD: process engineering. SUBSTANCE: invention relates to percussion tools, namely, hydraulic rock breakers. Proposed device comprises one-piece case with piston and piston rod, moving hammer, working tool and pressure conversion piston. Gas chamber is arranged between case, pressure conversion piston and hammer. Pressure conversion cylinder and compensation chamber are arranged between pressure conversion piston and piston rod. Connection channel is made between gas and compensation chambers. EFFECT: decreased weight and sizes, smaller recoil pulses. 6 cl, 3 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 449 882 (13) C2 (51) МПК B25D 9/04 (2006.01) B25D 9/20 (2006.01) B25D 9/26 (2006.01) E21C 37/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010103146/02, 08.07.2008 (24) Дата начала отсчета срока действия патента: 08.07.2008 (73) Патентообладатель(и): КОНЕК с.р.о. (SK) R U Приоритет(ы): (30) Конвенционный приоритет: 09.07.2007 SK PP 93-2007 (72) Автор(ы): КОНЕЧНИК Штефан (SK) (43) Дата публикации заявки: 20.08.2011 Бюл. № 23 2 4 4 9 8 8 2 (45) Опубликовано: 10.05.2012 Бюл. № 13 (56) Список документов, цитированных в отчете о поиске: US 5113950 A, 19.05.1992. SU 859622 A1, 30.08.1981. SU 845796 A3, 07.07.1981. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.02.2010 2 4 4 9 8 8 2 R U (87) Публикация заявки РСТ: WO 2009/008844 (15.01.2009) C 2 C 2 (86) Заявка PCT: SK 2008/000008 (08.07.2008) Адрес для переписки: 400096, г.Волгоград, а/я 4, пат.пов. Б.И.Машкину (54) ГИДРАВЛИЧЕСКИЙ ОТБОЙНЫЙ МОЛОТОК (57) Реферат: Изобретение относится к ударным устройствам, а именно к гидравлическим отбойным молоткам. Отбойный молоток содержит монолитный корпус с поршневым штоком и поршнем, подвижным ударником, рабочим инструментом и поршнем преобразователя давления. Между корпусом, поршнем преобразователя давления и ударником образована газовая камера. Между поршневым штоком и поршнем преобразователя ...

Control valve in a percussion device and a method comprising a closed pressure space at the end position of the piston

본 발명은 제어밸브, 충격장치 및 충격장치의 작동 사이클의 제어방법에 관한 것이다. 암반 파쇄용 충격장치 (1) 는 제어밸브 (2) 의해 제어되는 충격부재 (8) 를 포함한다. 제어밸브는 충격부재 (8) 의 작동압력면 (9) 으로 이어진 채널 (7b) 을 제어하도록 배치된 제어부재 (5) 를 포함한다. 말단 위치로의 제어부재의 이동이 폐쇄된 압력 공간부를 형성하도록 배치되고, 이 공간부에서 압력매체가 압축되어 제어부재의 운동에너지를 압력에너지로 전환시킨다. 압력에너지는 제어부재의 방향이 바뀔 때 운동에너지로 재전환되어 이용된다. The present invention relates to a control valve, a shock device and a control method of an operating cycle of the shock device. The rock fracture impact device 1 includes an impact member 8 controlled by a control valve 2. The control valve comprises a control member 5 arranged to control the channel 7b leading to the working pressure surface 9 of the impact member 8. The movement of the control member to the distal position is arranged to form a closed pressure space, in which the pressure medium is compressed to convert the kinetic energy of the control material into pressure energy. The pressure energy is converted into kinetic energy and used when the direction of the control member changes. 충격장치, 제어밸브, 제어방법. Impact device, control valve, control method.

충격 장치

충격 장치(2)는, 타격 피스톤(5), 타격 피스톤(5)의 왕복 운동을 제어하는 제어 분배기(11), 및 타격 피스톤(5)의 타격 행정을 변화시키는 제어 장치(15)를 포함한다. 이 제어 장치(15)는, 복수의 제 1 제어 채널(18a, 18b, 18c), 제어 분배기(11)에 연결되는 제 2 제어 채널(19), 복수의 제어 위치 사이에서 움직일 수 있게 장착되는 제어 슬라이드(16), 및 이 제어 슬라이드에 의해 형성된 수용 하우징 안에 장착되는 조절 슬라이드(34)를 포함하고, 제어 슬라이드(16)와 조절 슬라이드(34)는, 제 2 제어 채널(19)에 연결되어 있는 제 1 조절 챔버(36), 및 고압 유체 공급 회로(12)에 연결되어 있는 제 2 조절 챔버(37)를 형성한다. 제어 슬라이드(34)는, 제 1 조절 챔버(36)와 제 2 조절 챔버(37)가 서로 연결되는 제 1 위치와, 제 1 조절 챔버(36)와 제 2 조절 챔버(37)가 서로 격리되는 제 2 위치 사이에서 움직일 수 있게 장착된다.

Деструктивный гидромолот

1. Деструктивный гидромолот, имеющий монолитный несущий цилиндрический корпус, содержащий цилиндрические поршневой шток, подвижный ударник и рабочий инструмент, приводимые в действие впуском и выпуском напорной рабочей жидкостью, отличающийся тем, что в части несущего корпуса (1) находится неподвижно расположенный поршневой шток (2) с поршнем (21), на который установлено подвижное клапанное кольцо - клапанная кольцевая втулка (23), укороченный и в осевом направлении жесткий ударник (3), введенный во втулку (24) ударника, поршень (25) мультипликатора, причем в другой части несущего корпуса находятся рабочий инструмент (4), свободно выставленный во втулку (27) инструмента, защищенную с внешней стороны посредством уплотнительной крышки (29), при этом таким размещением между несущим корпусом, поршнем мультипликатора и ударником образована газовая камера (45), между поршневым штоком и поршнем мультипликатора образован цилиндр (43) мультипликатора и компенсационная камера (44), а между газовой камерой и компенсационной камерой образован соединяющий канал (26). ! 2. Деструктивный гидромолот по п.1, отличающийся тем, что цилиндрический корпус ударника имеет выполненное по оси внутреннее заглубление диаметром, соответствующим диаметру поршневого штока, при этом выставленный в заглублении поршневой шток образует замкнутую полость, разделенную поршнем на первую камеру (41) и вторую камеру (42), причем поршневой шток в полости первой камеры имеет на поверхности сплошной участок ограниченной длины с уменьшенным диаметром, на котором выставленная клапанная кольцевая втулка, имеющая протяженность большую, чем участок длины поршневого што РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2010 103 146 (13) A (51) МПК B25D 9/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2010103146/02, 08.07.2008 (71) Заявитель(и): КОНЕК с.р.о. (SK) Приоритет(ы): (30) Конвенционный приоритет: 09.07.2007 SK PP 93-2007 (72) ...

Hydraulic impact arrangement

A hydraulic percussion apparatus comprising a body, a cylinder in the body and a percussion piston reciprocating in the cylinder. A distributing valve moves in a valve housing. A valve for starting and stopping the percussion apparatus is provided. A hydraulic pump and hydraulic channels form a percussion circuit with a gas/liquid pressure accumulator. A distributing valve circuit and a free circulation circuit are provided for the pump which are parallelly coupled with the percussion circuit, which circuits are connected to the pump and to the start-and-stop valve which has positions for controlling pressure in the circuits. The start-and-stop valve has a middle position during which pressure in the percussion circuit rises up to a predetermined value while the distributing valve circuit remains closed independent of the pressure in the percussion circuit.

DEVICE FOR CREATING A RETURNING AND ACCESSIBLE MOVEMENT, VALVE BLOCK FOR HIM AND PNEUMATIC TOOL

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (51) ÌÏÊ 7 (11) 2004 128 390 (13) A B 25 D 9/20, 9/12 ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2004128390/02, 01.03.2003 (71) Çà âèòåëü(è): ÀéÏèÒè Òåêíîëîäæèñ ÀÁ (SE) (30) Ïðèîðèòåò: 05.03.2002 EP 02445029.8 (72) Àâòîð(û): ÒÎÐÍÎÊÂÈÑÒ Ïèòåð (SE) (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 05.10.2004 (74) Ïàòåíòíûé ïîâåðåííûé: Ìîæàéñêèé Ìèõàèë Àíäðååâè÷ (86) Çà âêà PCT: EP 03/02118 (01.03.2003) Àäðåñ äë ïåðåïèñêè: 190000, Ñàíêò-Ïåòåðáóðã, íàá. Ìîéêè, 58, Ïàòåíòèêà, ïàò.ïîâ. Ì.À.Ìîæàéñêîìó (54) ÓÑÒÐÎÉÑÒÂÎ ÄËß ÑÎÇÄÀÍÈß ÂÎÇÂÐÀÒÍÎ-ÏÎÑÒÓÏÀÒÅËÜÍÎÃÎ ÄÂÈÆÅÍÈß, R U Ôîðìóëà èçîáðåòåíè 1. Óñòðîéñòâî äë ñîçäàíè âîçâðàòíî-ïîñòóïàòåëüíîãî äâèæåíè , ïðèâîäèìîå â äåéñòâèå ñæàòîé òåêó÷åé ñðåäîé, êîòîðîå ñîäåðæèò ïåðâóþ (5) è âòîðóþ (3) ÷àñòè, ñïîñîáíûå ïåðåìåùàòüñ â îñåâîì íàïðàâëåíèè îòíîñèòåëüíî äðóã äðóãà, è â êîòîðîì èìååòñ ðàáî÷à êàìåðà (7), âûïîëíåííà ñ âîçìîæíîñòüþ ïîâûøåíè â íåé äàâëåíè , ÷òî âûçûâàåò ïåðåìåùåíèå óêàçàííûõ ÷àñòåé îòíîñèòåëüíî äðóã äðóãà, èëè ñíèæåíè äàâëåíè ; â ïåðâîé ÷àñòè (5) èìååòñ ïåðâûé êàíàë (6) äë ïîäà÷è ðàáî÷åé òåêó÷åé ñðåäû â ðàáî÷óþ êàìåðó (7), à âî âòîðîé ÷àñòè (3) èìååòñ âòîðîé êàíàë (15) äë âûïóñêà òåêó÷åé ñðåäû èç ðàáî÷åé êàìåðû (7), ïðè÷åì êëàïàííûé áëîê (8), ñîäåðæàùèé êëàïàííûå çàòâîðû, óñòàíîâëåííûå ñ âîçìîæíîñòüþ ïåðåìåùåíè îòíîñèòåëüíî óêàçàííûõ ÷àñòåé, ïðåäíàçíà÷åí äë óïðàâëåíè ïîòîêîì òåêó÷åé ñðåäû â ïåðâîì è âòîðîì êàíàëàõ â çàâèñèìîñòè îò îòíîñèòåëüíîãî ïîëîæåíè óêàçàííûõ ÷àñòåé è, òàêèì îáðàçîì, äë óïðàâëåíè ïîâûøåíèåì äàâëåíè â ðàáî÷åé êàìåðå, îòëè÷àþùååñ òåì, ÷òî êëàïàííûé áëîê ñîäåðæèò ñðåäñòâà óïðàâëåíè , ïðèñîåäèíåííûå ïî ìåíüøåé ìåðå ê îäíîìó èç äâóõ êëàïàííûõ çàòâîðîâ, òàê ÷òî êëàïàííûå çàòâîðû îòäåëåíû äðóã îò äðóãà â îñåâîì íàïðàâëåíèè, â ðåçóëüòàòå ÷åãî âõîä òåêó÷åé ñðåäû â ðàáî÷óþ êàìåðó (7) èç ïåðâîãî êàíàëà îòäåëåí îò âûõîäà òåêó÷åé ñðåäû èç ðàáî÷åé êàìåðû (7) âî âòîðîé êàíàë (15). 2. Óñòðîéñòâî ïî ï. ...

Air-distributing device of impact-action pneumatic machines

The portable compressed-air impact tool has a striker piston reciprocating in a housing to form working chambers of variable volume. The housing has a distributor chamber connected to the working chambers and to the compressed air supply in turn by a valve working in it. The valve (22) is a cylindrical sleeve, enclosing one or more openings (32) with its inner surface, through which the air is delivered to the distributor chamber (19). This opening leads to one or more lengthwise channels (29) formed in the valve, permanently connected to the compressed air supply, and delivering to the working chamber inlet passages (25, 26).

Hydraulic percussion machine

Изобретение относитс  к горной промышленности , а именно к устройствам ударного действи  дл  разрушени  горных пород. Цель изобретени  - повышение срока службы устройства за счет исключени  кавитации рабочей жидкости. Гидравлическое устройство ударного действи  содержит корпус 1, в полости которого расположен с возможностью осевого перемещени  и взаимодействи  с инструментом 2 боек (Б) 4, имеющий бурт (БУ) 3. Корпус 1 и Б 4 образуют верхнюю 5, среднюю 6 и ; i нижнюю (НК) 7 камеры. Камера 5 заполнена газом. Камера 6 св зана со сливной магистралью 11, Через золотник 10 НК 7 попеременно св зана со сливной 11 и напорной 12 магистрал ми, 8.полости корпуса 1 коакси- ально Б 4 со стороны НК 7 с возможностью осевого перемещени  установлен полый поршень (П) 17. Устройство имеет несколько вариантов выполнени . Установлен П 17 может быть под БУ 3, на БУ 3. Выполнен П 17 может быть с ограничительным по ском, При выполнении БУ 3 с первой ступенью П 17 выполнен с диаметром внутренней поверхности , ответным диаметру этой ступени , выполненной длиной,по величине не меньшей длины П 17 до ограничительного по ска. Шток Б 4 может быть выполнен с проточкой, ширина которой по величине больше ширины ограничительного по ска П 17. При выполнении БУ 3 со второй ступенью П 17 выполн етс  с ответной этой ступени расточкой. При отскоке Б 4 после удара по инструменту 2 И. 17 продолжает движение вниз и преп тствует возникновению кавитации в НК 7. Затем поддействием давлени  масла П 17 поднимаетс  до контакта с Б 4. 5 з.п. ф-лы, 14 ил. tf.tf В &amp;amp; fsl х|

Hydraulic Breaker

본 발명은 유압 브레이커에 관한 것으로, 실린더와, 피스톤과, 치즐과, 백헤드와, 실린더 부쉬, 및 밸브를 포함한다. 밸브는 실린더 부쉬의 내측면과 실린더 내경부에 상하 방향으로 이동 가능하게 설치된다. 밸브는 상단면에 실린더 상실의 압력이 작용하는 밸브 상측부와, 하단면에 실린더 상실의 압력이 작용하는 밸브 하측부와, 밸브 상측부와 밸브 하측부 사이에서 밸브 상측부와 밸브 하측부보다 큰 외경으로 확장되어 제1 상측 밸브 수압면이 제1,2 유로와 연통되는 제1 밸브 확경부와, 제1 밸브 확경부와 밸브 하측부 사이에서 제1 밸브 확경부보다 큰 외경으로 확장되어 제2 상측 밸브 수압면이 제4 유로와 연통되고 제1 상측 밸브 수압면보다 넓은 면적의 하측 밸브 수압면에 밸브 전환실의 압력이 작용하는 제2 밸브 확경부를 포함한다.

Impact device

FIELD: process engineering. ^ SUBSTANCE: invention relates to impact device. Proposed device comprises housing and impact piston arranged therein to reciprocate forced by operating fluid. Housing accommodates first and second operating fluid chambers, control valve arranged around impact piston ear end to move along impact piston, and operating fluid channels. Impact piston read end has annular surface that faces control valve. Control valve inner surface has annular surface facing impact piston. With aforesaid annular surfaces aligned, they throttle operating fluid flow between impact piston and control valve. At impact piston back stroke start, control valve stays at extreme rear position. With impact piston displaced into preset position, rear annular surface is aligned with that on control valve inner surface. With impact piston travelling on, pressure in operating fluid second chamber increases. Pressure acting on control valve surface from the side of second chamber makes control valve moving towards front end of impact device. ^ EFFECT: control valve position changes fast and efficient, damping pad is created for piston and valve. ^ 10 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 415 008 (13) C1 (51) МПК B25D 9/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009128073/02, 19.12.2007 (24) Дата начала отсчета срока действия патента: 19.12.2007 (72) Автор(ы): КОСКИМЯКИ Антти (FI), КОТАЛА Ари (FI) R U (73) Патентообладатель(и): САНДВИК МАЙНИНГ ЭНД КОНСТРАКШН ОЙ (FI) Приоритет(ы): (30) Конвенционный приоритет: 21.12.2006 FI 20065834 (45) Опубликовано: 27.03.2011 Бюл. № 9 2 4 1 5 0 0 8 (56) Список документов, цитированных в отчете о поиске: FI 20030261 A, 24.09.2004. SU 1293328 A1, 28.02.1987. RU 2167990 C2, 27.05.2001. SU 600261 A1, 30.03.1978. US 2003006052 A1, 09.01.2003. 2 4 1 5 0 0 8 R U (86) Заявка PCT: FI 2007/050703 (19.12.2007) C 1 C 1 (85) Дата начала ...

Piercing apparatus

A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill. The piercing apparatus executes the piercing by moving back and forth, by using a feed unit, a drifter equipped with a forward-blowing unit, a reverse-blowing unit and a rotary unit, and wherein cylinders containing a cylindrical blowing piston are provided in front of, and at the back of, a drifter body maintaining a distance relative to each other; a shank rod having, formed as a unitary structure, a blowing portion of a large diameter with blowing surfaces formed on the front and rear portions thereof and rod-like small-diameter portions protruding forward and backward beyond the blowing portion, is provided along the axial direction of the drifter body in a manner that the blowing portion is positioned between the front cylinder and rear cylinder and that the small-diameter portions on both sides are fitted to the cylindrical blowing pistons of the respective sides; and valves are provided in the outer peripheral portions of the front and rear cylinders to supply hydraulic pressure into the cylinders.

Impact tool operated by pressure fluid

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Arrangement in connection with a hydraulically operated impact device, such as a breaking apparatus

본 발명은 파쇄 장치 따위의 유압식 충격 장치로서, 충격 피스톤(2)과, 충격 장치의 안팎으로 압력유를 이송하기 위한 수단과, 축압기로 구성된 유압식 충격 장치에 관한 것이다. 본 발명에 따라, 축압기는 충격 피스톤(2)을 둘러싸는 환상 공간으로서 형성된다. 축압기는 프레임(5)과 슬리브(9) 사이에 배열된 슬리브형 다이어프램(11)에 의해 분리되는 슬리브형 압력실(6a, 6b)로 이루어진다. 압력실(6a, 6b)은 프레임의 둘레에 배치된 슬리브(9)의 내주 및 프레임(5)의 외주에 상호 대향하는 리세스가 제공될 수 있도록 형성된다.

Control valve and method for an impact device having an operating cycle including a plurality of coupling moments

Working machine

차체(4)에 붐(5)을 상하 요동 가능하게 설치하고, 해당 붐에 아암(7)을 상하 요동 가능하게 설치하여, 해당 아암에 버킷(10)을 상하 회전 가능하게 설치하고, 상기 붐, 상기 아암 및 상기 버킷을 붐 실린더(6), 아암 실린더(8) 및 버킷 실린더 (11)로 각각 구동하도록 하여, 상기 아암에 진동 발생 장치(13)를 설치하고, 해당 진동 발생 장치에 전압구(19), 치즐(58) 또는 항타구를 교환 가능하게 설치하며, 상기 붐 실린더, 아암 실린더 및 버킷 실린더 중 적어도 하나의 실린더의 신장실과 수축실을 연통하여 탱크(78)에 연통하거나 또는 차단하는 플로트 밸브(84)를 설치하여, 전압 작업시에는 상기 플로트 밸브를 개방하고, 파쇄 작업시 및 항타 작업시에는 상기 플로트 밸브를 폐쇄하도록 한 작업 기계이다. The boom 5 is vertically swingably mounted on the vehicle body 4 and the arm 7 is pivotally mounted on the boom so that the bucket 10 is vertically rotatably mounted on the arm. The arm and the bucket are driven by the boom cylinder 6, the arm cylinder 8 and the bucket cylinder 11 so that the arm is provided with the vibration generating device 13, 19, a chisel 58, or an anti-tip ball is interchangeably provided, and a float (not shown) that communicates with the tank 78 by communicating the extension chamber and the shrinkage chamber of the cylinder of at least one of the boom cylinder, the arm cylinder, A valve 84 is provided to open the float valve at the time of voltage operation and to close the float valve at the time of crushing operation and hunting operation.

Control valve and a method for a percussion device with a working cycle involving several coupling moments

本发明涉及一种控制阀、撞击装置以及用于控制撞击装置的工作循环的方法。用于破碎岩石的撞击装置(1)包括冲击元件(8)，其利用控制阀(2)进行控制。该控制阀包括控制元件(5)，该控制元件设置为控制通向冲击元件(8)的工作压力表面(9)的通道(7b)。在控制阀的工作循环期间，该控制元件设置为在多个连接瞬间打开和关闭压力通道，从而在阀的一个工作循环期间，设置为能够产生多个冲击脉冲。

Hydraulic drive for an impact tool

PNEUMATIC HAMMER

Hydraulic hammering device

피스톤 전진시에 전실을 저압 회로로 절환하는 방식의 액압식 타격 장치에 있어서, 전실용 라이너와의 접접 개소에서의 피스톤의 "마손"의 발생을 저감시킨다. 전실(2)은, 실린더(10)의 내면에 감합된 전실용 라이너(30)를 가진다. 전실용 라이너(30)의 후부의 내주면에는, 전실(2)과 연통되어 작동유가 채워지는 액실 공간이 쿠션실(3)로서 형성되어 있다. 쿠션실(3)은, 전실용 라이너(30)의 라이너 베어링부를 통과하는 작동유를 저압 회로로 유도하는 드레인 회로와는 별개로 마련된 제2의 드레인 회로(제1 단면홈(46)~슬릿(48)~제2 단면홈(47))를 가진다. In a hydraulic striking device of a system in which the front chamber is switched to a low-pressure circuit when the piston advances, the occurrence of "wear" of the piston at a point in contact with the front chamber liner is reduced. The front chamber 2 has a front chamber liner 30 fitted to the inner surface of the cylinder 10. On the inner circumferential surface of the rear portion of the front chamber liner 30, a liquid chamber space in communication with the front chamber 2 and filled with hydraulic oil is formed as a cushion chamber 3. The cushion chamber 3 has a second drain circuit (first end face groove 46 to slit 48) provided separately from a drain circuit that guides hydraulic oil passing through the liner bearing portion of the front chamber liner 30 to a low pressure circuit. ) ~ Has a second cross-sectional groove (47)).

Hydraulic impact mechanism

A hydraulic percussion machine, comprising a body carrying hydraulic passages and valves, and having a gas-filled, hydraulic pressure accumulator for storing the stroke energy which accelerates a piston to strike against a tool. The percussion machine has a separate hydraulic stroke standardizing circuit by action of which the piston stroke is independent of the liquid pressure in the high pressure line supplying the machine and of the volumetric flow.

Drilling hydraulic percussion device

In an hydraulic rock drill there is an hydraulic so called recoil damper that damps the reflected shock waves that propagates from the rock backwardly through the drill stem. The damper comprises a support piston (68) slidably in a cylinder so that a pressure chamber (20) is formed in which the support piston has a piston area. Narrow clearances (75,76) between the support (68) and its cylinder form leak passages and these leak passages are coupled in series with an orifice restrictor (84) to tank. The pressure peaks in the pressure chamber do not reach sealing rings located at the outer portions of the clearances.

Percussion device

Hydraulic impact tool

내용 없음.

Successive hole boring machine and lost strike preventing device for successive hole boring machine

내용 없음. No content.

Breaker using in nitrogen gas and hydraulic pressure

본 고안은 콘크리트파쇄, 암반파쇄, 경토파쇄 등을 수행하는 설비인 브레이커에 관한 것으로, 피스톤의 길이방향을 따라 단차를 형성하여 피스톤의 외경이 변화되도록 함으로써 피스톤과 실린더의 내,외주면에 접하는 부위에 소정의 공간을 형성한 제1,2,3챔버와; 고압의 유체가 공급되는 유체주입구와 연통되고 제1챔버와 통할 수 있도록 실린더의 주면 일부에 형성되는 제1유체통로와; 제1유체통로와 제1챔버가 연통되는 대향단측에 구비된 밸브실과; 밸브실과 제2챔버를 선택적으로 연통시키도록 실린더의 주면상에 형성된 제2유체통로와; 밸브실에 장착되어 제1챔버로 공급된 고압의 유체를 밸브실로 귀환시킴과 동시에 다수의 관통공들과 제2유체통로를 통해 밸브실의 고압이 제2챔버로 공급될 수 있도록 설치되는 밸브세트와; 제1,2유체통로 사이에 형성되고 피스톤의 승하강동작에 따라 밸브세트를 통해 밸브실과 선택적으로 연통되게 구비된 전환유로와; 전환유로와 인접하여 형성되고 제3챔버 내의 잔류압력을 유체관통공을 통해 제거할 수 있도록 배설된 개폐통로를 포함하여 구성된다. The present invention relates to a breaker which is a facility that performs concrete crushing, rock crushing, light soil crushing, etc., and forms a step along the longitudinal direction of the piston so that the outer diameter of the piston is changed so as to contact the inner and outer peripheral surfaces of the piston and the cylinder. First, second and third chambers forming a predetermined space; A first fluid passage formed in a part of a main surface of the cylinder so as to be in communication with the fluid inlet for supplying a high pressure fluid and to communicate with the first chamber; A valve chamber provided on an opposite end side in which the first fluid passage and the first chamber communicate; A second fluid passage formed on the main surface of the cylinder to selectively communicate the valve chamber and the second chamber; A valve set installed in the valve chamber to return the high pressure fluid supplied to the first chamber to the valve chamber and to supply the high pressure of the valve chamber to the second chamber through the plurality of through holes and the second fluid passage. Wow; A switching passage formed between the first and second fluid passages and selectively connected with the valve chamber through the valve set in accordance with the lifting and lowering operation of the piston; And an opening and closing passage formed adjacent to the switching passage and disposed to remove the residual pressure ...

Hydraulic hammer with impact system sub-component

本发明公开了一种用于液压锤(20)的冲击系统(70)。所述冲击系统包括活塞(80)、与该活塞同轴布置的套筒(100)，以及布置在所述套筒外部的蓄能器膜(90)。第一密封件(137)位于所述套筒的端部，并配置成将所述套筒连接至所述活塞；所述蓄能器膜具有配置成接合所述套筒中凹部(109)的延伸部(97)。

Portable, pneumatic percussive tool - has tubular type slide valve connecting air supply channels to return and work chambers

The pneumatic stroke machine comprises a housing (1) in which is a stroke mechanism (2) connected to a tool. The mechanism divides the housing into two chambers, a return chamber (8) and a work chamber (10). These are alternately joined to air supply channels (11) via a slide valve (4) and a valve (6) which moves axially close to the end surface of the work chamber. The slide valve (4) has the form of a sleeve with a base, the base being in the shape of a flattened cone and turned to the side opposite the stroke mechanism. Valve (6) is mounted in the sleeve so that a chamber (14) is formed. The valve body is equipped with a choke channel (5) connected to chamber (14).

PERCUSSION HYDRAULIC MACHINE

L'INVENTION A POUR OBJET UNE MACHINE HYDRAULIQUE A PERCUSSION. CETTE MACHINE AVEC UN ELEMENT DE CORPS1 COMPORTE DES TUBULURES ET DES SOUPAPES HYDRAULIQUES8, 16 ET UN ACCUMULATEUR 2 DE PRESSION HYDRAULIQUE A REMPLISSAGE A GAZ POUR EMMAGANISER L'ENERGIE DE CHOC QUI ACCELERE UN PISTON3 DE FACON A LUI FAIRE FRAPPER UN OUTIL4. LA MACHINE COMPORTE UN CIRCUIT5 SEPARE HYDRAULIQUE DE NORMALISATION DE COURSE, GRACE AUQUEL LA COURSE DU PISTON EST INDEPENDANTE DE LA PRESSION DU LIQUIDE DANS LA CANALISATION HAUTE PRESSION6 QUI ALIMENTE LA MACHINE ET DU FLUX VOLUMETRIQUE. APPLICATIONS: MACHINES A PERCUSSION HYDRAULIQUE POUR ACTIONNER UN OUTIL. THE SUBJECT OF THE INVENTION IS A HYDRAULIC PERCUSSION MACHINE. THIS MACHINE WITH A BODY ELEMENT1 INCLUDES HYDRAULIC TUBING AND VALVES8, 16 AND A HYDRAULIC PRESSURE ACCUMULATOR 2 WITH GAS FILLING TO STORE SHOCK ENERGY WHICH ACCELERATES A PISTON3 SO AS TO MAKE IT HIT A TOOL4. THE MACHINE INCLUDES A SEPARATE HYDRAULIC STROKE NORMALIZATION CIRCUIT5, THANKS TO WHICH THE PISTON STROKE IS INDEPENDENT OF THE LIQUID PRESSURE IN THE HIGH PRESSURE CHANNEL6 WHICH SUPPLIES THE MACHINE AND THE VOLUMETRIC FLOW. APPLICATIONS: HYDRAULIC PERCUSSION MACHINES TO OPERATE A TOOL.

SHOCK DEVICE

1. Ударное устройство, содержащее корпус (1а) и расположенный в нем ударный поршень (2), способный возвратно-поступательно перемещаться в продольном направлении под воздействием рабочей жидкости, расположенные в корпусе (1а) первое и второе пространства (3, 4) рабочей жидкости соответственно в заднем конце и переднем конце ударного устройства, контрольный клапан (5), являющийся, по существу, золотниковым клапаном, расположенный вокруг заднего конца ударного поршня (2) и подвижно установленный в продольном направлении ударного поршня (2), и каналы рабочей жидкости для подачи рабочей жидкости под давлением в ударное устройство и из ударного устройства, отличающееся тем, что в заднем конце ударного поршня (2) расположена кольцевая поверхность (2f; 2f'), обращенная в сторону контрольного клапана (5), и соответственно на внутренней поверхности контрольного клапана (5) расположена кольцевая поверхность (5b; 5b'), обращенная в сторону ударного поршня (2) так, что при совмещении кольцевых поверхностей (2f, 5b; 2f', 5b') они, по существу, дросселируют поток рабочей жидкости между ударным поршнем (2) и контрольным клапаном (5), при этом при начале обратного хода ударного поршня (2) контрольный клапан (5) расположен в своем самом заднем положении и закрывает доступ рабочей жидкости ко второму пространству (4) рабочей жидкости в заднем конце ударного устройства (2), причем рабочая жидкость может протекать из второго пространства (4) рабочей жидкости через канал (11) рабочей жидкости впереди контрольного клапана (5) от ударного устройства, и при смещении ударного поршня (2) назад в заданное положение кольцевая поверхность (2f, 2f') в его заднем конце совмещаетс РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2009 128 073 (13) A (51) МПК B25D 9/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2009128073/02, 19.12.2007 (71) Заявитель(и): САНДВИК МАЙНИНГ ЭНД КОНСТРАКШН ОЙ (FI) Приоритет(ы ...

PERCUSSION APPARATUS

HYDRAULIC PERCUSSION APPARATUS.

Hydraulic impact device

"HYDRAULIC IMPACT DEVICE" Inventor - Edgar J. Justus ABSTRACT OF THE DISCLOSURE A hydraulic impact device in which a hammer member having a piston portion is reciprocally disposed in a cylinder, a reciprocating sleeve valve is disposed within the cylinder and surrounds the hammer member. The sleeve valve has a first peripheral seal with an upper portion of the cylinder and a second peripheral seal with the lower portion of the cylinder so that an annular cavity is formed between the first and the second peripheral seals. The bottom portion of the sleeve valve forms a single seal with the upper portion of the piston section. A pressure relief valve is situated between the inlet to said annular cavity and an annular cavity below the piston portion to insure that the pressure in said annular cavity is greater than the pressure in the cavity below the piston portion and the sleeve valve thus effecting a sealing force between the sleeve valve and the upper face of the piston portion. An energy storage means is provided for receiving energy from said ram member during its upward stroke. The upper and lower sealing portions of said sleeve valve are axially spaced such that when said lower sealing portion seals a fluid inlet port, the upper sealing portion opens a fluid outlet port thereby reducing the pressure in said annular cavity by interrupting a fluid communication between the inlet port and said annular cavity and establishing fluid communication between the outlet port and said annular cavity.

PNEUMATIC ASSEMBLY FOR DESSAVING FOUNDRY CORES

Percussion device with automatic regulation of the supply pressure of the percussion device

Cet appareil à percussions (2) comprend un corps (3) délimitant un cylindre de piston (4) ; un piston de frappe (5) monté déplaçable de façon alternative à l’intérieur du cylindre de piston (4), le piston de frappe (4) et le cylindre de piston (4) délimitant une première chambre de commande (8) reliée en permanence à un circuit d’alimentation en fluide haute pression (12) de l’appareil à percussions (2) et une deuxième chambre de commande (9) qui est antagoniste à la première chambre de commande (8) ; et un distributeur de commande (11) configuré pour commander un mouvement alternatif du piston de frappe (5) à l’intérieur du cylindre de piston (4) alternativement suivant une course de frappe et une course de retour, le distributeur de commande (11) étant configuré pour relier la deuxième chambre de commande (9) alternativement au circuit d’alimentation en fluide haute pression (12) et à un circuit de retour de fluide basse pression (13) de l’appareil à percussions (2). Le distributeur de commande (11) est en outre configuré pour réguler automatiquement la pression d’alimentation de l’appareil à percussions (2) à une valeur de pression prédéterminée. Figure 3 This percussion device (2) comprises a body (3) defining a piston cylinder (4); a striking piston (5) mounted so as to move in an alternating manner inside the piston cylinder (4), the striking piston (4) and the piston cylinder (4) defining a first control chamber (8) connected in permanently to a high pressure fluid supply circuit (12) of the percussion apparatus (2) and a second control chamber (9) which is antagonistic to the first control chamber (8); and a control valve (11) configured to control reciprocating movement of the strike piston (5) within the piston cylinder (4) alternately along a strike stroke and a return stroke, the control valve (11) ) being configured to connect the second control chamber (9) alternately to the high pressure fluid supply circuit (12) and to a low pressure fluid return ...

HYDRAULIC PERCUSSION DEVICE, IN PARTICULAR FOR DRILLING APPARATUS

DISPOSITIF DE PERCUSSION HYDRAULIQUE, NOTAMMENT POUR APPAREIL DE FORAGE. LE DISPOSITIF DE PERCUSSION HYDRAULIQUE EST CARACTERISE EN CE QUE LA VALVE DE DEMARRAGEARRET 6 COMPORTE UNE POSITION MEDIANE 62 OU LA PRESSION REGNANT DANS LE CIRCUIT DE PERCUSSION 8 AUGMENTE JUSQU'A UNE VALEUR PREDETERMINEE, TANDIS QUE LE CIRCUIT DE VALVE DISTRIBUTRICE 9 RESTE FERME INDEPENDAMMENT DE LA PRESSION EXISTANT DANS LE CIRCUIT DE PERCUSSION. APPLICATION AUX APPAREILS DE FORAGE. HYDRAULIC PERCUSSION DEVICE, ESPECIALLY FOR DRILLING EQUIPMENT. THE HYDRAULIC PERCUSSION DEVICE IS CHARACTERIZED IN THAT THE START-OFF VALVE 6 HAS A MIDDLE POSITION 62 OR THE PRESSURE IN THE PERCUSSION CIRCUIT 8 INCREASES TO A PREDETERMINED VALUE, WHILE THE VALVE CIRCUIT 9 IS DISTRIBUTED. THE EXISTING PRESSURE IN THE PERCUSSION CIRCUIT. APPLICATION TO DRILLING EQUIPMENT.

Advanced percussion tools and machines

Slaughter sheep

PRESSURE-FLUID-DRIVEN PERCUSSION DRILLING MACHINE

PERCUSSION TOOL

PERCUSSION TOOL

Outil à percussion. Il comporte un cylindre 1, une gaine 2 montée sur celui-ci, un piston 5 monté dans la gaine de manière à effectuer un mouvement de va-et-vient sous l'effet d'un gaz et d'une pression hydraulique, et une soupape tubulaire 7, montée de façon coulissante sur la gaine pour commander un circuit hydraulique ; la soupape est relevée et abaissée hydrauliquement sans l'aide d'un ressort et il n'y a pas d'accumulateur de gaz. Application à un excavateur. Percussion tool. It comprises a cylinder 1, a sheath 2 mounted thereon, a piston 5 mounted in the sheath so as to perform a reciprocating movement under the effect of gas and hydraulic pressure, and a tubular valve 7, slidably mounted on the sheath to control a hydraulic circuit; the valve is hydraulically raised and lowered without the aid of a spring and there is no gas accumulator. Application to an excavator.

Hydraulic oscillator with valve movement control - has piston communicating between channel and chamber pocket when piston moves to end of displacement in one direction

In a hydraulic oscillator having a piston and valve element both movable in opposite directions and both disposed in a chamber in which hydraulic pressure is switched in opposite senses between supply and return pressures, appts. for controlling the movement of the valve element comprises (a) means in the chamber defining a pocket for receiving the valve element when it moves in one of the directions and has switched the fluid pressure in the chamber in one of the opposite senses so as to develop forces on the piston in the direction opposite to the one direction, (b) channel means operative when in communication with the pocket for, providing a path, for the flow of hydraulic fluid from the pocket when the valve element is received therein, and (c) means in the piston for providing communication between the channel means and the pocket when the piston has moved to a position near the end of its displacement in one direction. The displacement of the valve in one direction, and the period of time for the valve element to switch the fluid pressure in the chamber in the other of the opposite senses, so as to again enable the development of forces on the piston in the one direction, is controllable as a function of the flow through the channel means.

Patent FR2375959B1

IMPACT TOOL OF THE HAMMER TYPE

PERCUSSION TOOL

Patent FR534790A

Patent FR2361978B1

Collision type hydraulic device

本発明は、シリンダーを含む本体（１）を備える。このシリンダー内には工具の衝突ピストン（１）が摺動自在に取り付けられる。ピストンの運動は分配器（１５）によって制御される。この分配器は、衝突ピストンに同軸な関係に配置されかつ分配箱（３）内に取り付けられる。分配箱（３）は、ピストン（１）に軸線方向で重なりかつ該ピストンと同軸な関係に配置された部分を備える。分配箱（３）はピストンと共に制御チャンバ（１３）を画成する。この制御チャンバは連続して低及び高圧力下に置かれる流体を分配箱（１３）内に配置された通路（１６）を通して分配器（１５）の運動を制御するチャンバに連通させ、もって低及び高圧力を交互に生成する。

PNEUMATIC ASSEMBLY FOR DESSAVING FOUNDRY CORES

Patent FR2328547B1

PNEUMATIC ASSEMBLY FOR DESSAVING FOUNDRY CORES

L'invention concerne un dispositif de dessablage des noyaux de fonderie, comprenant :- un fût (1) comportant des premiers moyens (20) d'arrivée d'air comprimé et des moyens (25) d'évacuation d'air pulsé ;- un cylindre d'approche (3) coulissant dans le fût sous l'action de l'air comprimé, entre une position rétractée et une position de travail où une bouterolle (5) est en contact avec une pièce de travail ; et- des moyens de frappe (50) pour imprimer des chocs répétés sur la bouterolle.Ce dispositif comprend:- des moyens d'obturation (219) desdits moyens d'évacuation d'air, lesdits moyens d'obturation étant aptes à inhiber lesdits moyens de frappe pendant la course du cylindre d'approche de sa position rétractée à sa position de travail ; et- des moyens de temporisation (225) pour ouvrir lesdits moyens d'obturation à l'issue d'un délai prédéterminé après l'occurrence d'un événement déterminé. The invention relates to a grinding device for casting cores, comprising: - a barrel (1) comprising first compressed air supply means (20) and means (25) for discharging pulsed air; an approach cylinder (3) sliding in the drum under the action of the compressed air, between a retracted position and a working position where a rivet (5) is in contact with a work piece; and- striking means (50) for printing repeated shocks on the rivet.This device comprises: - means for closing (219) said air evacuation means, said closure means being able to inhibit said striking means during the stroke of the approach cylinder from its retracted position to its working position; and timing means (225) for opening said shutter means at the end of a predetermined time after occurrence of a given event.

Pneumatic tool

HYDRAULIC PERCUSSION APPARATUS WITH RETURNING SHOCK WAVE DAMPING DEVICE

Pneumatic hammer for riveting, chiselling, etc.

Device in a rock drilling machine and rock drilling machine

A device in a hydraulic rock drilling machine (1) including a distribution valve (7,7', 7") arranged in connection with the rock drilling machine for controlling hydraulic flows to different parts of the rock drilling machine, wherein the distribution valve includes a valve body (8, 8', 8"), which is arranged movable to and fro in axial directions inside a valve chamber (33) and wherein the valve chamber is limited in axial direction by two valve end walls (10,11; 10 ',11'; 10",11"). One of the valve end walls is movable in an axial direction against an abutment (12,12") in such a way that it defines an end position for the valve body, and a pressing device (13,13 ',13") is arranged for pressing said at least one of the valve end walls against said abutment. The invention also relates to a rock drilling machine.

METHOD FOR ADJUSTING THE STRIKING STROKE OF A STRIKING PISTON OF A PERCUSSION APPARATUS, AND A PERCUSSION APPARATUS FOR CARRYING OUT SAID METHOD

L'appareil à percussions comporte un piston de frappe et un dispositif de pilotage (15) configuré pour faire varier une course de frappe du piston de frappe, le dispositif de pilotage (15) comprenant un cylindre de pilotage (17), un tiroir de pilotage (16) monté mobile en translation dans le cylindre de pilotage (17) selon une direction de déplacement (D) et monté mobile en rotation dans le cylindre de pilotage (17), et une chambre de pilotage principale (26) délimitée par le tiroir de pilotage (16) et le cylindre de pilotage (16). L'appareil à percussions comprend en outre un dispositif de réglage configuré pour régler une plage de variation de la course de frappe du piston de frappe, le dispositif de réglage comprenant un organe de réglage (41) configuré pour régler la position angulaire du tiroir de pilotage (16) dans le cylindre de pilotage (17), et au moins un passage de communication fluidique (44.1, 44.2, 44.3) ménagé sur le tiroir de pilotage (16) et configuré pour limiter hydrauliquement la course de déplacement en translation du tiroir de pilotage (16) selon la direction de déplacement (D) en fonction de la position angulaire occupée par le tiroir de pilotage (16). The percussion apparatus comprises a striking piston and a piloting device (15) configured to vary a striking stroke of the striking piston, the piloting device (15) comprising a piloting cylinder (17), a drawer pilot (16) mounted movable in translation in the pilot cylinder (17) in a direction of movement (D) and mounted mobile in rotation in the pilot cylinder (17), and a main pilot chamber (26) delimited by the pilot valve (16) and the pilot cylinder (16). The percussion device further comprises an adjustment device configured to adjust a range of variation of the striking stroke of the striking piston, the adjustment device comprising an adjustment member (41) configured to adjust the angular position of the drawer. piloting (16) in the piloting cylinder (17), and at least one fluid ...

Improvements to pressurized fluid tools

PNEUMATIC ASSEMBLY FOR DESSAVING FOUNDRY CORES

L'invention concerne un dispositif de dessablage des noyaux de fonderie, comprenant :- un fût (1) comportant des premiers moyens (20) d'arrivée d'air comprimé et des moyens (25) d'évacuation d'air pulsé;- un cylindre d'approche (3) coulissant dans le fût sous l'action de l'air comprimé, entre une position rétractée et une position de travail où une bouterolle (5) est en contact avec une pièce de travail ; et- des moyens de frappe (50) pour imprimer des chocs répétés sur la bouterolle.Ce dispositif comprend des moyens de soufflage (29) pour créer un rideau d'air autour du cylindre d'approche au niveau de l'emplacement où il pénètre dans le corps. The invention relates to a grinding device for casting cores, comprising: - a barrel (1) comprising first compressed air supply means (20) and means (25) for discharging pulsed air; an approach cylinder (3) sliding in the drum under the action of the compressed air, between a retracted position and a working position where a rivet (5) is in contact with a work piece; and- striking means (50) for printing repeated impacts on the rivet.The device comprises blowing means (29) for creating an air curtain around the approach cylinder at the location where it penetrates. in the body.

Impact device

An impact device (10) for breaking up and separating hard material comprises an actuating system for providing a faster cycle rate as well as an increased impact force. More specifically, the device ( 10) includes a pair of pistons (173, 175) movably arranged in a cylinder (28) to cooperate in compressing the gaseous component pr ior to initiating the blow. A closed tube (204) is provided to fluidly interconnect opposite chambers (177, 181) adjacent the two p istons (173, 175) to coordinate the different movements of the pistons to effect the desired compression. The impact device (1 0) is particularly well suited for use in an impact bucket (12).

HAMMER

Distribution for pneumatic tools

Striking hammer operated by a fluid.

Le marteau frappeur présente un piston de travail (22) qui peut coulisser dans un cylindre de travail (21) et qui est commandé par un dispositif de commande (40, 41) de façon telle qu'il exécute des frappes sur une surface d'enclume (23) d'un adaptateur (24) qui peut être relié à un objet à faire pénétrer dans le sol. Lors de l'extraction de l'objet, un piston de contre-frappe (51) exécute des frappes en sens opposé sur l'adaptateur (24). On obtient ainsi de mieux libérer du trou de forage cet objet, qui peut être constitué par des tiges de forage ou des palplanches, par exemple.

DRIVE UNIT, FOR EXAMPLE TO SHAPE, DEFORM, COMPRESS, DRIVE, ROTATE DRIVE, ETC.

CETTE UNITE MOTRICE COMPORTE UN PISTON DE TRAVAIL 3 ET UN ORGANE DE TRAVAIL 4 DEPLACABLES SEPAREMENT. L'ORGANE DE TRAVAIL PEUT ETRE CONSTITUE PAR UNE TIGE DE PISTON OU PAR UN ARBRE D'ENTRAINEMENT EN ROTATION. LE PISTON DE TRAVAIL PEUT ETRE ACCOUPLE A L'ORGANE DE TRAVAIL DANS LA DIRECTION DU TRAVAIL (DIRECTION X) POUR TRANSMETTRE L'ENERGIE MOTRICE; IL PEUT EN ETRE DESACCOUPLE DANS LA DIRECTION OPPOSEE (DIRECTION Y). UN ACCUMULATEUR D'ENERGIE 14, 16 EST RELIE A L'ENCEINTE PRIMAIRE 10. LE VOLUME DE L'ENCEINTE SECONDAIRE 11 EST DETERMINE PAR UN PISTON AUXILIAIRE. THIS DRIVE UNIT INCLUDES A WORKING PISTON 3 AND A WORKING MEMBER 4 SEPARATELY MOVABLE. THE WORKING MEMBER MAY BE A PISTON ROD OR A ROTATING DRIVE SHAFT. THE WORKING PISTON MAY BE COUPLED TO THE WORKING ORGAN IN THE DIRECTION OF WORK (DIRECTION X) TO TRANSMIT THE DRIVING ENERGY; IT MAY BE DISCOUPLED IN THE OPPOSITE DIRECTION (DIRECTION Y). AN ENERGY ACCUMULATOR 14, 16 IS CONNECTED TO THE PRIMARY ENCLOSURE 10. THE VOLUME OF THE SECONDARY ENCLOSURE 11 IS DETERMINED BY AN AUXILIARY PISTON.

Improvements to tools and percussion machines

PRESSURE REGULATING DEVICE FOR PERCUSSION HYDRAULIC DEVICE

HYDRAULIC DEMOLISING MATERIAL

L'INVENTION CONCERNE UN MARTEAU DEMOLISSEUR HYDRAULIQUE. LE MARTEAU SELON L'INVENTION COMPREND UN CORPS AYANT UNE CHAMBRE AXIALE FORMEE DE PLUSIEURS SECTIONS CYLINDRIQUES 14, 20, 13 DANS LESQUELLES COULISSE UNE MASSE DE PERCUSSION 15 COMPORTANT DEUX ELEMENTS CYLINDRIQUES SOLIDAIRES DE DIAMETRES DIFFERENTS, L'ELEMENT SUPERIEUR 14 PRESENTANT UNE RAINURE ANNULAIRE 18 TANDIS QUE L'ELEMENT INFERIEUR PORTE UNE BAGUE ANNULAIRE 11 DU TYPE A PISTON. DANS UNE SECTION MEDIANE 20 DE LA CHAMBRE AXIALE EST LOGEE UNE SOUPAPE A TIROIR 19 POUR L'HUILE CONTROLANT LES DIFFERENTES PHASES DE FONCTIONNEMENT. A L'INTERIEUR DU MARTEAU SONT MENAGEES PLUSIEURS CONDUITES D'HUILE 35, 33, 34, 37, 39 POUR METTRE EN COMMUNICATION UN RESERVOIR 21 AVEC LES SECTIONS DE LA CHAMBRE AXIALE, OU CES DERNIERES ENTRE ELLES. LE MARTEAU EST DOTE EN OUTRE D'UN DISPOSITIF 24 DE REGLAGE DE LA FREQUENCE DE CHOC. CES CARACTERISTIQUES ASSURENT QUE LA PERCUSSION N'A LIEU QUE LORSQUE LE FORET EST PRESSE CONTRE LA SURFACE A DEMOLIR, D'OU IL RESULTE UNE FATIGUE MOINDRE DE L'OPERATEUR AINSI QU'UNE USURE MOINDRE DES PIECES CONSTITUTIVES. THE INVENTION RELATES TO A HYDRAULIC DEMOLISHER HAMMER. THE HAMMER ACCORDING TO THE INVENTION INCLUDES A BODY HAVING AN AXIAL CHAMBER SHAPED BY SEVERAL CYLINDRICAL SECTIONS 14, 20, 13 IN WHICH SLIDES A PERCUSSION MASS 15 INCLUDING TWO SOLIDAR CYLINDRICAL ELEMENTS OF DIFFERENT DIAMETERS, THE UPPER 18 RAIN ELEMENT 14 PRESENTING AN ANNUAL WHILE THE LOWER ELEMENT CARRIES AN ANNULAR RING 11 OF THE PISTON TYPE. IN A MIDDLE SECTION 20 OF THE AXIAL CHAMBER IS A DRAWER VALVE 19 FOR THE OIL CONTROLLING THE DIFFERENT PHASES OF OPERATION. INSIDE THE HAMMER ARE PROVIDED SEVERAL OIL DUCTS 35, 33, 34, 37, 39 TO COMMUNICATE A TANK 21 WITH THE SECTIONS OF THE AXIAL CHAMBER, OR THE LATEST BETWEEN THEM. THE HAMMER IS ALSO EQUIPPED WITH A DEVICE 24 FOR ADJUSTING THE SHOCK FREQUENCY. THESE CHARACTERISTICS ENSURE THAT PERCUSSION ONLY TAKES PLACE WHEN THE DRILL ...

METHOD FOR ADJUSTING THE STROKE STROKE OF A STRIPPER PISTON OF A PERCUSSION APPARATUS, AND A PERCUSSION APPARATUS FOR CARRYING OUT SAID METHOD

L'appareil à percussions comporte un piston de frappe et un dispositif de pilotage (15) configuré pour faire varier une course de frappe du piston de frappe, le dispositif de pilotage (15) comprenant un cylindre de pilotage (17), un tiroir de pilotage (16) monté mobile en translation dans le cylindre de pilotage (17) selon une direction de déplacement (D) et monté mobile en rotation dans le cylindre de pilotage (17), et une chambre de pilotage principale (26) délimitée par le tiroir de pilotage (16) et le cylindre de pilotage (16). L'appareil à percussions comprend en outre un dispositif de réglage configuré pour régler une plage de variation de la course de frappe du piston de frappe, le dispositif de réglage comprenant un organe de réglage (41) configuré pour régler la position angulaire du tiroir de pilotage (16) dans le cylindre de pilotage (17), et au moins un passage de communication fluidique (44.1, 44.2, 44.3) ménagé sur le tiroir de pilotage (16) et configuré pour limiter hydrauliquement la course de déplacement en translation du tiroir de pilotage (16) selon la direction de déplacement (D) en fonction de la position angulaire occupée par le tiroir de pilotage (16). The percussion apparatus comprises a striking piston and a steering device (15) configured to vary a striking stroke of the striking piston, the steering device (15) comprising a steering cylinder (17), a steering wheel pilot (16) movably mounted in translation in the control cylinder (17) in a direction of displacement (D) and rotatably mounted in the control cylinder (17), and a main control chamber (26) delimited by the pilot slide (16) and the steering cylinder (16). The percussion apparatus further comprises a tuning device configured to adjust a range of variation of the strike stroke of the striking piston, the adjusting device comprising a regulating member (41) configured to adjust the angular position of the piston piston. control (16) in the control cylinder (17), and at least ...

Patent FR559236A

PRESSURIZED FLUID PERCUSSION DRILLING MACHINE

L'INVENTION CONCERNE UNE MACHINE DE FORAGE PAR PERCUSSION ACTIONNEE PAR FLUIDE SOUS PRESSION. ELLE COMPREND UN CORPS 1 DELIMITANT UN VOLUME CYLINDRIQUE 2 POUR UN PISTON DE PERCUSSION 3 MOBILE AXIALEMENT ET DONT LE MOUVEMENT ALTERNATIF EST COMMANDE PAR UN DISTRIBUTEUR 9; IL EST PREVU UN MECANISME 18 ACTIONNE PAR PRESSION FLUIDIQUE POUR FAIRE TOURNER LA TIGE DE FORAGE 13; LE CORPS COMPORTE DEUX CONDUITS DE SORTIE 7, 19 DONT UN RELIE AU MECANISME ROTATIF 18 ET L'AUTRE A UN RESERVOIR DE FLUIDE SOUS PRESSION 8 DE FACON QUE LE PISTON DE PERCUSSION 3 DISTRIBUE LE FLUIDE REFOULE HORS DU VOLUME CYLINDRIQUE 2 DANS UNE PROPORTION DESIREE ENTRE LE RESERVOIR ET LE MECANISME ROTATIF. THE INVENTION RELATES TO A PERCUSSION DRILLING MACHINE ACTUATED BY PRESSURIZED FLUID. IT INCLUDES A BODY 1 DELIMING A CYLINDRICAL VOLUME 2 FOR A PERCUSSION PISTON 3 MOBILE AXIALLY AND WHOSE ALTERNATIVE MOVEMENT IS CONTROLLED BY A DISTRIBUTOR 9; A MECHANISM 18 ACTUATED BY FLUID PRESSURE IS PROVIDED FOR TO ROTATE THE DRILLING ROD 13; THE BODY INCLUDES TWO OUTLET DUCTS 7, 19 OF WHICH ONE CONNECTED TO THE ROTARY MECHANISM 18 AND THE OTHER TO A PRESSURE FLUID TANK 8 SO THAT THE PERCUSSION PISTON 3 DISTRIBUTES THE FLUID DELIVERED OUT OF THE CYLINDRICAL VOLUME 2 IN A PROPORTION OF THE FLUID UNDER PRESSURE 8. BETWEEN THE TANK AND THE ROTARY MECHANISM.

HYDRAULIC PERCUSSION APPARATUS WITH RETURNING SHOCK WAVE DAMPING DEVICE

Un piston frappeur étagé 4 est monté coulissant dans un cylindre 2 qui délimite une chambre annulaire avant 13, reliée en permanence à une arrivée d'huile sous pression 16, et une chambre annulaire arrière 14, reliée alternativement à l'arrivée d'huile sous pression 16 et au départ d'huile 17 vers le réservoir, grâce à une valve de commande 18 avec tiroir à sections différentielles 19. Une chambre annulaire d'amortissement 43, formée autour de la partie avant 11 du piston 4, est délimitée vers l'avant par une pièce tubulaire 39 et vers l'arrière par une face annulaire 50 appartenant au corps 1 de l'appareil. Cette chambre d'amortissement 43 peut communiquer avec la chambre avant 13 du cylindre 2 par au moins une gorge ou rainure longitudinale 52 de la partie 11 du piston, et elle peut aussi être mise en communication avec le circuit de retour 24, 37. A stepped striking piston 4 is slidably mounted in a cylinder 2 which delimits a front annular chamber 13, permanently connected to a pressurized oil inlet 16, and a rear annular chamber 14, connected alternately to the oil inlet under pressure 16 and the oil flow 17 to the tank, thanks to a control valve 18 with differential section slide valve 19. An annular damping chamber 43, formed around the front part 11 of the piston 4, is delimited towards the 'front by a tubular part 39 and rearward by an annular face 50 belonging to the body 1 of the device. This damping chamber 43 can communicate with the front chamber 13 of the cylinder 2 via at least one longitudinal groove or groove 52 of the part 11 of the piston, and it can also be placed in communication with the return circuit 24, 37.