Pilot pressure operated directional control valve and an operating
cylinder control apparatus
    1.
    发明授权
    Pilot pressure operated directional control valve and an operating cylinder control apparatus 失效
    先导式压力方向控制阀和操作气缸控制装置

    公开(公告)号:US5752426A

    公开(公告)日:1998-05-19

    申请号:US714166

    申请日:1996-09-27

    摘要: A pilot pressure operated directional control valve is provided in which a housing is formed therein with a spool having a plurality of ports. The spool bore has a spool fittingly inserted therein so as to be slidably displaceable therein and the spool is slidably displaced both by a spring and under a pilot pressure led into a pressure receiving chamber. Also a spring box is attached to an end surface of the housing in a longitudinal direction of the spool. The spring box is provided with a hollow portion which contains the spring while forming a pressure receiving chamber, as well as a pilot pressure fluid inlet that communicates with the hollow portion and is open in the longitudinal direction of the spool.

    摘要翻译: PCT No.PCT / JP95 / 00601 Sec。 371日期1996年9月27日第 102(e)1996年9月27日PCT 1995年3月29日PCT PCT。 公开号WO95 / 26476 日期1995年10月5日提供了一种先导式压力操作方向控制阀,其中在其中形成有具有多个端口的阀芯的壳体。 滑阀孔具有适配地插入其中的滑阀,以便在其中可滑动地移动,并且滑阀可滑动地由弹簧移动,并在导向压力接收室的先导压力下滑动。 另外,弹簧箱沿轴线的长度方向安装在壳体的端面上。 弹簧箱设置有形成压力接收室的中空部,该中空部包含弹簧,以及与中空部连通且在卷轴的长度方向上开口的先导压力流体入口。

    Pressure compensation valve unit and pressure oil supply system
utilizing same
    2.
    发明授权
    Pressure compensation valve unit and pressure oil supply system utilizing same 失效
    压力补偿阀单元和压力供油系统利用它

    公开(公告)号:US5813309A

    公开(公告)日:1998-09-29

    申请号:US704568

    申请日:1996-09-10

    摘要: A pressure compensation valve unit comprises a check valve which is pushed in an opening direction thereof by an inlet side pressure and in a closing direction thereof by an outlet side pressure and a pressure reducing valve actuating to establish communication between the inlet side and the outlet side and block the communication therebetween, pushed in the blocking up direction by a pressure in a pressure receiving chamber to push the check valve in the closing direction thereof, pushed in the communication direction with a highest pressure in a plurality of pressures by a pressure selective receiving means, and communicating the outlet side with the pressure chamber, and a pressure oil supply system is provided with the pressure compensation valve unit of the structure described above.

    摘要翻译: PCT No.PCT / JP95 / 00437 Sec。 371日期:1996年9月10日 102(e)日期1996年9月10日PCT 1995年3月15日PCT公布。 出版物WO95 / 25228 日期1995年9月21日压力补偿阀单元包括止回阀,该止回阀通过出口侧压力沿其开口方向被推入入口侧压力并且在其关闭方向上被推动,以便在入口之间建立连通 侧面和出口侧,并且阻止其间的连通,并通过压力接收室中的压力沿着阻塞向上的方向推动止回阀沿其关闭方向推动,在多个压力下以最高压力在连通方向上推动 通过压力选择接收装置将出口侧与压力室连通,并且压力供油系统设置有上述结构的压力补偿阀单元。

    Unloading system for hydraulic circuit
    4.
    发明授权
    Unloading system for hydraulic circuit 失效
    液压回路卸载系统

    公开(公告)号:US5735305A

    公开(公告)日:1998-04-07

    申请号:US663193

    申请日:1996-06-11

    摘要: An unloading system including an unload valve draining a part of supplied pressurized fluid to a tank and a switching valve for draining a pressurized fluid for biasing the unload valve in a direction for reducing a flow rate of the fluid supplied to the tank. The unload valve and the switching valve are arranged in series in axial direction in a valve main body.

    摘要翻译: PCT No.PCT / JP94 / 02175第 371日期:1996年6月11日 102(e)日期1996年6月11日PCT 1994年12月21日PCT PCT。 公开号WO95 / 17609 日期:1995年6月29日卸载系统,包括将供给的加压流体的一部分排出到罐的卸载阀,以及用于排出用于使卸载阀偏压的加压流体的切换阀,以减少供给到所述加压流体的流体的流量的方向 坦克。 卸载阀和切换阀在阀主体中沿轴向串联布置。

    Direction control valve
    5.
    发明授权
    Direction control valve 失效
    方向控制阀

    公开(公告)号:US5725022A

    公开(公告)日:1998-03-10

    申请号:US714075

    申请日:1996-09-10

    摘要: A direction control valve is constructed in such a manner that a spool bore having an inlet port, an actuator port and a tank port is formed in a valve block, a spool slidable between positions for establishing and blocking communication of the input port, the actuator port and the tank port, is disposed within the spool bore, the input port and the tank port open to a first mateable surface and a second mateable surface of the valve block, and a plurality of the valve blocks are stacked and connected with mating the first mateable surface and the second mateable surface for establishing communication between the input ports and between the tank ports of the valve blocks. An annular groove is formed in the second mateable surface of the valve block at a position outside of the ports, a drain confluence passage communicating with the annular groove is formed with opening in the first mateable surface and the second mateable surface, an oil seal for sealing between the spool bore and the spool is provided and the back surface side of the oil seal is communicated with the annular groove.

    摘要翻译: PCT No.PCT / JP95 / 00438 Sec。 371日期:1996年9月10日 102(e)日期1996年9月10日PCT 1995年3月15日PCT公布。 公开号WO95 / 25227 日期1995年9月21日方向控制阀构造成使得具有入口,致动器端口和罐口的滑阀孔形成在阀块中,可在位置之间滑动的阀芯,用于建立和阻断 输入端口,致动器端口和罐口,设置在阀芯孔内,输入口和罐口通向阀块的第一可配合表面和第二可匹配表面,并且多个阀块被堆叠 并且与第一可配对表面和第二可配对表面配合连接,以在输入端口和阀块的罐口之间建立连通。 在所述阀块的所述第二可配对表面中的位于所述端口外侧的位置处形成环形槽,在所述第一可配合表面和所述第二可配对表面中形成有与所述环形槽连通的排出汇流通道, 提供阀芯孔和阀芯之间的密封,并且油封的背面侧与环形槽连通。

    Pressurized fluid supply system
    6.
    发明授权
    Pressurized fluid supply system 失效
    加压流体供应系统

    公开(公告)号:US5533334A

    公开(公告)日:1996-07-09

    申请号:US302912

    申请日:1994-09-19

    摘要: A pressurized fluid supply system, in which a plurality of pressure compensation valves are connected to a pump discharge line of a hydraulic pump in parallel, and direction control valves are provided at the outlet side of each pressure compensation valve to supply a discharged pressurized fluid from the hydraulic pump to a plurality of actuators. The pressure compensation valves include a check valve portion establishing and blocking communication between the pump discharge line and the inlet port of the direction control valve, and a pressure reduction valve portion for supplying a reduced pressure from the pump discharge line. The check valve portion shifts in a valve opening direction in response to an inlet pressure and shifts in a valve closing direction in response to an outlet pressure. The pressure reduction valve portion has a first and a second pressure chamber. Pressure in the first pressure chamber urges a valve element toward a position establishing communication between the inlet side and the outlet side, and a pressure in the second pressure chamber cooperates with a spring to urge the valve element to a position blocking communication between the inlet side and the outlet side, and biasing the check valve portion toward the valve closing direction. A load pressure of the actuator, to which the pressurized fluid is supplied, is introduced into the first pressure chamber and fluidly connects all of the second pressure chambers together.

    摘要翻译: PCT No.PCT / JP93 / 00452 Sec。 371日期1994年9月19日 102(e)1994年9月19日PCT PCT 1993年4月8日PCT公布。 公开号WO93 / 21446 日期:1993年10月28日。一种压力流体供给系统,其中多个压力补偿阀并联连接到液压泵的泵排出管线,并且方向控制阀设置在每个压力补偿阀的出口侧 以将排出的加压流体从液压泵供给到多个致动器。 压力补偿阀包括建立和阻止泵排出管线与方向控制阀的入口之间的连通的止回阀部分和用于从泵排出管线提供减压的减压阀部分。 止回阀部分响应于入口压力而在阀打开方向上移动,并响应于出口压力而在关闭方向上移动。 减压阀部具有第一和第二压力室。 第一压力室中的压力促使阀元件朝向建立入口侧和出口侧之间的连通的位置,并且第二压力室中的压力与弹簧配合以将阀元件推动到阻挡入口侧 和出口侧,并且将止回阀部分朝向阀关闭方向。 将加压流体供应到的致动器的负载压力被引入到第一压力室中并将所有第二压力室流体连接在一起。

    Pressure compensation valve
    7.
    发明授权
    Pressure compensation valve 失效
    压力补偿阀

    公开(公告)号:US5485864A

    公开(公告)日:1996-01-23

    申请号:US347437

    申请日:1994-11-23

    摘要: A pressure compensation valve is capable of distributing of an output pressurized fluid of single pressurized fluid supply source to a plurality of hydraulic loads. The pressure compensation valve is constructed with a check valve portion formed by providing, in a valve body, a valve for establishing and blocking communication between an inlet port and an outlet port, and a pressure reduction valve formed by providing, in the valve body, a spool establishing communication between a second port and a third port by a pressure in a first pressure chamber communicating with a first port and blocking communication between the second port and the third port by a pressure in a second pressure chamber communicating with the third port. The spool is biased in a direction for blocking communication between the second port and the third port by a spring while contacting the valve.

    摘要翻译: PCT No.PCT / JP93 / 00724 Sec。 371日期1994年11月23日 102(e)1994年11月23日PCT PCT 1993年5月28日PCT公布。 出版物WO93 / 24756 日期:1993年9月12日。压力补偿阀能够将单个加压流体供应源的输出加压流体分配到多个液压负载。 压力补偿阀构成为具有止回阀部,该止回阀部通过在阀体中设置用于建立和阻断入口和出口之间的连通的阀以及通过在阀体中设置形成的减压阀而形成, 阀芯通过与第一端口连通的第一压力室中的压力在第二端口和第三端口之间建立连通,并且通过与第三端口连通的第二压力室中的压力阻止第二端口和第三端口之间的连通。 阀芯在与阀门接触的同时通过弹簧阻止第二端口和第三端口之间的连通的方向偏置。