• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PCT No. PCT/FI81/00040 Sec. 371 Date Jan. 11, 1982 Sec. 102(e) Date Jan. 11, 1982 PCT Filed May 28, 1981 PCT Pub. No. WO81/03527 PCT Pub. Date Dec. 10, 1981.A hydraulic piston cylinder device comprising a cylinder, a piston dividing the cylinder into two cylinder spaces (A and B), and valve members between the cylinder spaces and respective pressure medium pipes. The problem is to achieve a hydraulic piston cylinder device in which the pressure or tractive force of the cylinder is maintained even if the external pressure led into the cylinder would stop. To solve this problem, an elastic material is interposed between two piston parts, and is elastically compressible by the external pressure applied to the cylinder; and the valve members are coupled to each other so that when one of the valve members is closed the other cannot be closed.
    公开号:SU1501928A3
    申请号:SU823394902
    申请日:1982-02-04
    公开日:1989-08-15
    发明作者:Матти Леппела
    申请人:Ой Тампелла Аб (Фирма)；
    IPC主号:
    专利说明:


    th
    cm
    31501928
    2,3 cavities, 2,3 cavities communicated with the system for supplying the working medium under pressure and with a drain through the valve device 11. The device 11 includes spring-loaded ball valves 15, 16 placed in one housing and interacting with a movable stop 17, the piston 4 is made from two rigid parts 5,6, inter
    The unit with which the elastic accumulator gasket 7 is placed. The length of the stop 17 is chosen longer than the distance between the balls with the valves 15, 16 closed. The force from the side of the piston 4 to the force loading object is maintained due to the action of the gasket 7, which maintains the pressure in the cavity 2. 1 sludge.
    The invention relates to mechanical engineering and can be used as a device that transmits a compressive or tensile force to a silo-loading object.
    The aim of the invention is to increase reliability with a sharp drop in pressure of the working medium in the supply line and with a sharp increase in load.
    The drawing shows a hydraulic piston cylinder device.
    The hydraulic piston-cylinder device comprises a housing 1, in which, with the formation of working cavities 2 and 3, a piston 4 is installed, consisting of rigid parts 5 and 6, between which there is an elastic accumulator gasket 7 connected to the rod 8. Cavities 2 and 3 of the line MI 9 and 10 through the valve element 11 are connected to the supply line 12 and the drain line 13. The valve element 11 includes a housing 14, in which are placed under
    spring loaded ball valves 15 and
    16 interacting with a movable stop 17, the latter being longer than the distance between the valves 15 and 16 in their closed state.
    Hydraulic piston cylinder device operates as follows.
    When supplying the working medium under pressure via supply line 12 (line 13 communicates with drain) under the action of pressure, valve 15 opens, jointly cavity 2 through line 9 with supply line 12. In this case, the movable support 17 moves to the right (according to the drawing Open valve 16 and together cavity 3 with a drain.


    The piston 4 moves to the right (according to the drawing) until it stops at a meeting with a force loading object (not shown), while the gasket 7 is compressed, storing energy. When the supply line 12 is broken, the valve 15 is closed, preventing leakage of working medium from the cavity 2, and the force from the piston 4 with the rod 8 to the force loading object is maintained due to the action i of the accumulating gasket 7, which maintains the pressure in the cavity 2.
    When supplying the working medium under pressure to line 13 and communicating line 12 with a drain, the device operates in the same way, but in the opposite direction.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A hydraulic piston-cylinder device comprising a housing, a piston with a rod, housed in the housing with the formation of working cavities communicated with the working medium supply system under pressure and with a drain through a valve device including spring-loaded ball valves located in one housing and interacting with a movable stop t in order to increase reliability in operation with a sharp drop in pressure of the working medium in the supply line and with a sharp increase in load, the piston is made of two rigid parts which are placed IU u accumulating resilient gasket, and the movable pawl selected length greater than the distance between the two balls at zakry-, ies valves.
    类似技术:
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    SU994326A1|1983-02-07|Hydro-gas shock-absorbing device of automatic coupling
    SU875161A1|1981-10-23|Distributing device
    同族专利:
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    CA1172137A|1984-08-07|
    RO80169A|1982-10-26|
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    US4558630A|1985-12-17|
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    WO1981003527A1|1981-12-10|
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    NO153903C|1986-06-11|
    NO820268L|1982-01-29|
    JPS57500749A|1982-04-30|
    CS403081A2|1985-08-15|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE186638C1|1963-01-01|
    US1358628A|1920-03-27|1920-11-09|Fisher Charley William|Oil-lift|
    US1481011A|1923-05-07|1924-01-15|Bryan P Joyce|Floating piston|
    US1508264A|1923-07-02|1924-09-09|Guiberson Corp|Piston structure|
    US2765622A|1950-04-27|1956-10-09|Ernest C Chasser|Control mechanism for pump and motor fluid system|
    GB762768A|1953-10-14|1956-12-05|W H Barker & Son Engineers Ltd|Pneumatic rams|
    US2958445A|1958-10-30|1960-11-01|Walter A Jesse|Plunger means for mortar gun|
    FR1274649A|1960-09-16|1961-10-27|Improvements to cylinder-motors actuated by pressurized fluid|
    FR1485331A|1965-07-09|1967-06-16|Danfoss As|Valve combination for hydraulic systems|
    FR1465713A|1965-12-03|1967-01-13|Gemmmer France|Double retaining valve for various hydraulic circuits and especially for those ensuring the steering of vehicles traveling on various terrains|
    US3382772A|1966-06-07|1968-05-14|Int Harvester Co|Hydraulic cylinder construction|
    US3872670A|1973-05-02|1975-03-25|Caterpillar Tractor Co|Selectively actuatable shock absorbing system for an implement control circuit|
    GB1394929A|1973-06-18|1975-05-21|Capilano Eng Co Ltd|Hydraulic direction-control valve|
    US3908515A|1973-09-10|1975-09-30|Caterpillar Tractor Co|Hydraulic circuit with selectively actuatable float control|
    US3974742A|1974-10-31|1976-08-17|Caterpillar Tractor Co.|Lock valve assembly|
    DE2535751C3|1975-08-11|1983-04-07|7990 Friedrichshafen Zahnradfabrik Friedrichshafen Ag|Hydrostatic steering device, in particular for land and water vehicles|
    DE2631382C3|1976-07-13|1982-02-18|Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen|Pistons, especially for a pneumatic cylinder|
    FR2387391B1|1977-04-13|1981-02-27|Jouvenel & Cordier|
    US4192338A|1978-05-15|1980-03-11|Gerulis Benedict R|Hydraulic lock-out device|
    US4341149A|1979-08-30|1982-07-27|Caterpillar Tractor Co.|Selectively actuatable fluid control system for a work element|IT1152387B|1982-09-10|1986-12-31|Riva Calzoni Spa|PROTECTION DEVICE AGAINST OVERLOADS IN A HYDRAULIC CYLINDER|
    GB2281942B|1993-09-15|1997-08-13|Automotive Prod France|Hydraulic actuators|
    FR2781772B1|1998-07-31|2000-10-13|Sofab|DISPENSER OF LIQUID PRODUCTS FOR DELIVERY BY SPRAYING|
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    US7721756B2|2007-03-02|2010-05-25|Paul Hedding|One-piece spring and poppet incorporated into a valve seat assembly and associated method for manufacturing a one-piece spring and poppet|
    CN103089740B|2012-12-31|2015-07-15|蚌埠液力机械有限公司|Unloading valve and unloading valve oil cylinder|
    FR3056266A1|2016-09-22|2018-03-23|Hydro Leduc|HYDRAULICALLY CONTROLLED SYSTEM|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI801815A|FI60429C|1980-06-05|1980-06-05|HYDRAULIC KOLVCYLINDERANORDNING MED SITT VENTILORGAN|
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