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23 条记录 (耗时 0.019 秒)

    Flow control valve assembly
    2.
    发明授权
    Flow control valve assembly 失效
    流量控制阀总成

    公开(公告)号：US4984603A

    公开(公告)日：1991-01-15

    申请号：US425162

    申请日：1989-10-17

    申请人： Tadao Karakama ,  Naoki Ishizaki ,  Toshiro Takano ,  Sadao Nunotani

    发明人： Tadao Karakama ,  Naoki Ishizaki ,  Toshiro Takano ,  Sadao Nunotani

    IPC分类号： G05D7/01 ,  G05D16/00

    CPC分类号： G05D7/0193 ,  Y10T137/7764

    摘要： A flow control valve assembly, for preventing the pressure oil confined in an inlet port of a valve housing from pulsating and for additionally performing a safety valve function without employing a separate safety valve, has a valve housing which is easy in machining thereof and neat in construction. In the valve housing of the flow control valve assembly is formed a valve-receiving bore (21) in which a poppet (32) and a second spool valve (51), serving as a safety valve, are axially aligned with each other in series. In the valve housing (20), a hydraulic operating oil flows to a communication port (39) of the poppet (32) through an inlet port (23) formed in the valve housing (20), and then further flows to a back-pressure chamber portions (38a, 38b) of the poppet (32) through a variable orifice (44). The pressure oil, having been received in the back-pressure chamber portion (38b), flows out of the portion (38b) to an outer peripheral portion of the second spool valve ( 51). On the other hand, the pressure oil confined in the inlet port (23) flows to a pressure-receiving chamber (56) of the second spool valve (51).

    摘要翻译： PCT No.PCT / JP89 / 00203 Sec。 371日期：1989年10月17日 102（e）日期1989年10月17日PCT提交1989年2月28日PCT公布。 出版物WO89 / 08291 日本1989年9月8日。一种流量控制阀组件，用于防止限制在阀壳体的入口中的压力油脉动并且用于在不使用单独的安全阀的情况下额外执行安全阀功能。具有阀壳体 容易加工，整洁。 在流量控制阀组件的阀壳体中形成有阀接收孔（21），其中用作安全阀的提升阀（32）和第二滑阀（51）串联地彼此轴向对准 。 在阀壳体（20）中，液压操作油通过形成在阀壳体（20）中的入口（23）流到提升阀（32）的连通口（39） 提升阀（32）的压力室部分（38a，38b）通过可变孔口（44）。 已经被容纳在背压室部分（38b）中的压力油从部分（38b）流出到第二滑阀（51）的外周部分。 另一方面，限制在入口（23）中的压力油流入第二滑阀51的受压室56。

    Poppet valve device
    3.
    发明授权
    Poppet valve device 失效
    POPPET阀装置

    公开(公告)号：US5076144A

    公开(公告)日：1991-12-31

    申请号：US474029

    申请日：1990-06-20

    申请人： Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Toshiro Takano

    发明人： Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Toshiro Takano

    IPC分类号： F15B13/02

    CPC分类号： F15B13/02 ,  Y10T137/87201 ,  Y10T137/87893

    摘要： A poppet valve device according to the present invention is adapted to sequentially operate a plurality of poppet valves the switching operation of a pilot valve, for example, an electromagnetic solenoid or the like which operates in response to an external input signal. The above-mentioned poppet valve device includes first and second poppet valves (A, B) each of which is constructed so that a poppet (32) for communicating or intercepting an inlet port (30) and an outlet port (31) with or from each other may be moved towards a communicating position by an inlet port side pressure acting upon its pressure receiving portion (32a). The poppet (32) may be moved towards an intercepting position by a pressure acting upon its back pressure chamber (38a, 38b). A pilot valve (c) connects the respective back pressure chambers of these poppet valves to a tank (2) and includes a variable choke portion controlled by an external input signal so that the pressures at the respective back pressure chambers, when the respective poppets of the respective poppet valves are moved to the positions for communicating the respective inlet ports with the respective outlet ports, may be different from each other.

    Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector
    6.
    发明授权
    Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector 失效
    用于操作多个执行器的液压回路及其压力补偿阀和最大负载压力检测器

    公开(公告)号：US5481872A

    公开(公告)日：1996-01-09

    申请号：US244439

    申请日：1994-09-23

    申请人： Tadao Karakama ,  Teruo Akiyama ,  Kouji Yamashita ,  Naoki Ishizaki

    发明人： Tadao Karakama ,  Teruo Akiyama ,  Kouji Yamashita ,  Naoki Ishizaki

    IPC分类号： E02F9/22 ,  F15B11/17 ,  F15B13/04 ,  F16D31/02 ,  F15B11/08

    CPC分类号： F15B13/0417 ,  E02F9/2225 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/27 ,  F15B2211/3054 ,  F15B2211/3111 ,  F15B2211/40515 ,  F15B2211/40569 ,  F15B2211/41518 ,  F15B2211/428 ,  F15B2211/455 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/6303 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/65 ,  F15B2211/654 ,  F15B2211/6654 ,  F15B2211/7142 ,  F15B2211/78

    摘要： Simultaneous operation efficiency in a case where a plurality of actuators are operated by one or a plurality of hydraulic pumps is improved. A delivery pressure passage (1a) of one hydraulic pump (1) and that (1a) of the other hydraulic pump (1) communicate with each other through a first short-circuit passage (39) via a pair of check valves (38, 38), and an unload valve (40) is provided in this first short-circuit passage (39). The load pressure introduction passages (6, 6) on the left and right hydraulic pumps (1, 1) communicate with each other through a second short-circuit passage (36) via a pair of check valves (35, 35), and a relief valve (37) is provided in this short-circuit passage (36). The unload valve (40) is unloaded by the differential pressure between the pump delivery pressure in the first short-circuit passage (39) and the load pressure in the second short-circuit passage (36), whereby a single relief valve (37) carries out a relieving operation both at the time of flow merging and at the time of flow branching to equalize the maximum pump delivery pressures. The set pressure of the relief valve (37) can be a high level so as to relieve the valve (37) under a predetermined high load pressure, whereby the relieving operation can be arbitrarily controlled.

    摘要翻译： PCT No.PCT / JP92 / 01540 Sec。 371日期1994年9月23日 102（e）1994年9月23日PCT PCT日期：1992年11月25日PCT公布。 公开号WO93 / 11364 日期：1993年6月10日。在多个致动器由一个或多个液压泵操作的情况下的同时操作效率提高。 一个液压泵（1）的输送压力通道（1a）和另一个液压泵（1）的（1a）通过第一短路通道（39）经由一对止回阀（38， 38），在该第一短路通路（39）上设置有卸载阀（40）。 通过一对止回阀（35,35），通过第二短路通路（36）将左右液压泵（1,1）的负荷压力引入通路（6,6）相互连通， 在该短路通路（36）上设有安全阀（37）。 卸载阀（40）通过第一短路通道（39）中的泵输送压力和第二短路通道（36）中的负载压力之间的压差来卸载，由此单个安全阀（37） 在流动合并时和流动分支时均执行减压操作以均衡最大泵输送压力。 安全阀（37）的设定压力可以是高水平，以便在预定的高负载压力下释放阀（37），从而可以任意地控制卸载操作。

    Control valve system
    7.
    发明授权
    Control valve system 失效
    控制阀系统

    公开(公告)号：US5046400A

    公开(公告)日：1991-09-10

    申请号：US425176

    申请日：1989-10-17

    申请人： Tadao Karakama ,  Naoki Ishizaki ,  Yosuke Oda

    发明人： Tadao Karakama ,  Naoki Ishizaki ,  Yosuke Oda

    IPC分类号： F15B11/00 ,  F15B11/08 ,  F15B13/00 ,  F15B13/08 ,  F16K27/00 ,  G05D16/00

    CPC分类号： F15B13/0842 ,  E02F9/2267 ,  F15B13/0807 ,  F15B13/0892 ,  F15B13/0896 ,  F15B2013/006 ,  Y10T137/87241

    摘要： In a control valve system provided with a plurality of valves for controlling a hydraulic equipment such as hydraulic cylinders, there are employed a plurality of valves each of which does not interfere with each other in operation and requires a minimum mounting space in the system to enable the system to be a small-sized system having a construction easily adapted to control a plurality of hydraulic equipments. The control valve system comprises: a valve (10) assuming a rectangular parallelepiped form; a first (11) and a second (12) pump port passage formed in an upper portion of a valve housing of the valve (10) so as to be parallel to each other; a tank port passage (13) formed in a lower central portion of the valve housing; a first (14) and a second (15) port passage vertically formed in the valve housing so as to separately open into an upper surface of the valve housing to communicate with each of pressure chambers of the hydraulic equipment; and a plurality of valves (19, 20, 23, 24) inserted into a plurality of valve receiving bores formed in the valve housing so as to shut off desired ones of these port passages from the remaining port passages.

    Pilot operated control valve system
    9.
    发明授权
    Pilot operated control valve system 失效
    先导式控制阀系统

    公开(公告)号：US5040565A

    公开(公告)日：1991-08-20

    申请号：US425174

    申请日：1989-10-17

    申请人： Tadao Karakama ,  Naoki Ishizaki ,  Yosuke Oda

    发明人： Tadao Karakama ,  Naoki Ishizaki ,  Yosuke Oda

    IPC分类号： F15B11/00 ,  F15B11/08 ,  F15B13/00 ,  F15B13/08

    CPC分类号： F15B13/0842 ,  F15B13/0807 ,  F15B13/0892 ,  F15B13/0896 ,  F15B2013/006 ,  Y10T137/87201 ,  Y10T137/87209 ,  Y10T137/87885

    摘要： In a pilot operated control valve system provided with a plurality of valves for controlling hydraulic equipment such as hydraulic cylinders, there are employed a plurality of valves each of which does not interfere with each other in operation and requires a minimum mounting space in said system to enable said system to be a small-sized system having a construction easily adapted to control a plurality of hydraulic equipments. The control valve system comprises: a valve (10) assuming a rectangular parallelepiped form; a first (11) and a second (12) pump port passage so formed in an upper portion of a valve housing of said valve (10) as to horizontally and parallelly extend to each other and as to communicate with a hydraulic pump; a tank port passage (13) formed in a lower central portion of said valve housing; a pilot tank port passage (25) so formed ina central portion of the valve housing as to communicate with a drain tank; a first (14) and a second (15) port passage vertically formed in said valve housing so as to separately open into an upper surface of said valve housing to communicate with each of pressure chambers of said hydraulic equipment; a plurality of valves (19, 20, 23, 24) inserted into a plurality of valve receiving bores formed in said valve housing so as to shud off desired ones of these port passages from said remaining port passages; and pilot valves for supplying the pilot pressure oil to these valves.