公开(公告)号：US5136930A

公开(公告)日：1992-08-11

申请号：US474042

申请日：1990-06-20

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

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

IPC分类号： E02F9/22 ,  F15B13/01 ,  F15B20/00 ,  F16L55/10 ,  F15B11/08

CPC分类号： F15B13/015 ,  E02F9/226 ,  F16L55/1022 ,  Y10T137/87201 ,  Y10T137/87209

摘要： An apparatus for supplying a pressure oil to a plurality of hydraulic cylinders of a working machine such as power shovels provided with working equipment such as shovels, wherein the cylinders are contracted at the same speed to move down or lower the working equipments at the same speed, so that the working equipment are prevented from suddenly dropping off in operation even if pressure oil passages (a, b) supplying the pressure oil to the cylinders are damaged during operation. The apparatus comprises: a lock valve assembly (B) provided with a valve housing (70) mounted on a cylinder tube of each of the hydraulic cylinders, in which valve housing (70) a check valve (77), a poppet valve (78) and a pilot valve (79) are mounted; and a directional control valve assembly (C) for selectively supplying the pressure oil to a lifting-movement pressure chamber (9a) and a lowering-movement pressure chamber (9b) of each of the hydraulic cylinders through the pressure oil passages (a, b), respectively.

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.

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。

公开(公告)号：US5163477A

公开(公告)日：1992-11-17

申请号：US720509

申请日：1991-06-24

申请人： Toshiro Takano ,  Sadao Nunotani ,  Naoki Ishizaki

发明人： Toshiro Takano ,  Sadao Nunotani ,  Naoki Ishizaki

IPC分类号： F16K31/06

CPC分类号： F16K31/0613 ,  Y10T137/86622

摘要： This invention relates to an electrohydraulic proportional control valve which continually provides pressurized oil into an oil path on the output side to prevent the existence of air therein and which can move a spool without any time delay when a solenoid is energized, thus improving response. The hydraulic proportional control valve includes a spool which establishes/cuts off communication between an inlet port communicating with a hydraulic pump and an outlet port on the output side, a spring disposed in such a manner as to apply to the base end of the spool such a spring force, which is in equilibrium with the oil pressure force acting on the tip of the spool so as to keep the spool at the position where the inlet port and the outlet port slightly communicate with each other, and a moving rod disposed in such a manner as to oppose the base end of the spool. The control valve further includes a solenoid, which biases the spool in a direction in which the inlet port and the outlet port communicate completely with each other.

公开(公告)号：US5234028A

公开(公告)日：1993-08-10

申请号：US761341

申请日：1991-09-06

申请人： Toshiro Takano ,  Sadao Nunotani ,  Naoki Ishizaki

发明人： Toshiro Takano ,  Sadao Nunotani ,  Naoki Ishizaki

IPC分类号： G05D16/04 ,  G05D16/10 ,  G05D16/20

CPC分类号： G05D16/18 ,  Y10T137/7905

摘要： A variable pressure control valve arranged to enable a pilot piston having a comparatively small diameter to be used thereby making the whole body of the valve compact. This variable pressure control valve comprises a spool (2) kept in pressure contact with the valve seat of a pressurized fluid inlet port (1) by the resilient force of a compression spring (3); a stationary valve shoe (5) fixed so as to support the base end of the compression spring; and an auxiliary compression spring (6) which urges the spool (2) to the side of the valve seat on one side thereof and is urged by a pilot piston (4) on the other side thereof.

摘要翻译： PCT No.PCT / JP90 / 00317 Sec。 371日期1991年9月6日 102（e）1991年9月6日PCT PCT 1990年3月9日PCT公布。 WO90 / 10901 PCT出版物 1990年9月20日。一种可变压力控制阀，其设置成能够使用具有相对较小直径的先导活塞，从而使阀体的整体致密。 该可变压力控制阀包括通过压缩弹簧（3）的弹性力保持与加压流体入口（1）的阀座压力接触的阀芯（2）; 固定阀座（5），固定在支承压缩弹簧的基端部; 以及辅助压缩弹簧（6），该辅助压缩弹簧（6）在其一侧将阀芯（2）推压到阀座的侧面，并且由另一侧的先导活塞（4）推动。

公开(公告)号：US5857330A

公开(公告)日：1999-01-12

申请号：US765259

申请日：1996-12-20

申请人： Naoki Ishizaki ,  Toshiro Takano

发明人： Naoki Ishizaki ,  Toshiro Takano

IPC分类号： B60K17/10 ,  B62D11/18 ,  E02F9/22 ,  F15B11/00 ,  F15B11/02 ,  F15B11/05 ,  F15B11/16 ,  F15B13/02 ,  F16H61/44 ,  F15B13/06

CPC分类号： F15B11/05 ,  B62D11/005 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2253 ,  E02F9/2296 ,  F15B13/022 ,  F16H61/40 ,  F16H61/452 ,  F15B2211/20553 ,  F15B2211/3054 ,  F15B2211/405 ,  F15B2211/40515 ,  F15B2211/41545 ,  F15B2211/428 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/78

摘要： A travelling control circuit for a hydraulically driven type of travelling apparatus is provided. The circuit has a hydraulic pump, left and right hand side directional control valves provided parallel to each other in a discharge path of the hydraulic pump, a left hand side first and second circuit and a right hand side first and second circuit. Furthermore, the output sides of the left hand side and right hand side directional control valves are connected with a left and right hand side travelling purpose hydraulic motor, respectively. In addition, a pressure compensating valve is provided with each of the first and second circuits to control the opening between an inlet port and an outlet port in response to a difference in pressure between a self load pressure and a maximum load pressure of the load pressures of the left and right hand side travelling purpose hydraulic motors, thereby compensating a pressure in the fluid. When the pressurized fluid is compensated, the pressure compensating valves establish communication between the left hand side and the right hand first circuits and between the left hand side and the right hand side second circuits. When communication between the inlet port an the outlet port is blocked or substantially blocked, the pressure compensating valves block communication between the left hand side and the right hand side first circuits and communication between the left hand side and the right hand side second circuits, respectively.

摘要翻译： PCT No.PCT / JP95 / 01227 Sec。 371日期1996年12月20日第 102（e）日期1996年12月20日PCT提交1995年6月20日PCT公布。 出版物WO95 / 35220 日期1995年12月28日提供了一种用于液压驱动型行进装置的行驶控制回路。 电路具有液压泵，在液压泵的排出路径中彼此平行设置的左右侧方向控制阀，左侧第一和第二回路以及右手侧第一和第二回路。 此外，左侧和右侧方向控制阀的输出侧分别与左右侧行驶用液压马达连接。 此外，压力补偿阀设置有第一和第二回路中的每一个，以响应于自负载压力和负载压力的最大负载压力之间的压力差来控制入口端口和出口之间的开口 的左右侧行驶用液压马达，从而补偿流体中的压力。 当加压流体被补偿时，压力补偿阀建立左手侧和右手第一回路之间以及左手侧和右手侧第二回路之间的连通。 当入口端口与出口端口之间的连通被阻塞或基本阻塞时，压力补偿阀分别阻止左手侧和右手侧第一回路之间的通信以及左手侧和右手侧第二回路之间的连通 。

公开(公告)号：US5832808A

公开(公告)日：1998-11-10

申请号：US776675

申请日：1997-02-04

申请人： Naoki Ishizaki ,  Toshiro Takano

发明人： Naoki Ishizaki ,  Toshiro Takano

IPC分类号： E02F9/22 ,  F15B11/024 ,  F15B11/12 ,  F15B13/02 ,  F15B11/08

CPC分类号： F15B13/021 ,  F15B11/024 ,  F15B11/123 ,  F15B2211/30525 ,  F15B2211/3133 ,  F15B2211/35 ,  Y10T137/86606 ,  Y10T137/8663

摘要： A directional control valve unit includes a first actuator port connected to a raising side chamber of a working machine cylinder. In addition, a second actuator port is connected to a lowering side chamber of the working machine cylinder. A regeneration passage makes the second actuator port communicate with a regeneration port through a check valve. A main spool is adapted to supply a pressure oil to the second actuator port and to make the first actuator port communicate with a tank port and the regeneration port by moving the main spool in one direction. The directional control valve unit also includes a switching device for switching the maximum moving distance of the main spool in the one direction in a plurality of stages.

摘要翻译： PCT No.PCT / JP95 / 01547 Sec。 371日期1997年2月4日 102（e）日期1997年2月4日PCT提交1995年8月3日PCT公布。 公开号WO96 / 04481 日期1996年2月15日方向控制阀单元包括连接到工作机气缸的升高侧室的第一致动器端口。 此外，第二致动器端口连接到作业机筒的下降侧室。 再生通道使得第二致动器端口通过止回阀与再生端口连通。 主阀芯适于向第二致动器端口提供压力油，并且通过沿一个方向移动主阀芯来使第一致动器端口与罐口和再生端口连通。 方向控制阀单元还包括用于在多个级中沿一个方向切换主阀芯的最大移动距离的开关装置。

公开(公告)号：US5730182A

公开(公告)日：1998-03-24

申请号：US776677

申请日：1997-02-04

申请人： Naoki Ishizaki ,  Toshiro Takano

发明人： Naoki Ishizaki ,  Toshiro Takano

IPC分类号： F16K17/30 ,  E02F9/22 ,  F15B11/05 ,  F15B13/04 ,  G05D16/10 ,  F15B11/16

CPC分类号： F15B13/0417 ,  G05D16/10 ,  Y10S137/906 ,  Y10T137/7764 ,  Y10T137/7766 ,  Y10T137/777

摘要： A pressure compensation valve is constructed with a valve establishing and blocking a communication between an inlet port and an outlet port, a pressure receiving chamber, a piston driven by a load pressure within the pressure receiving chamber and shifting the valve in blocking direction, an intermediate pressure receiving chamber communicated with the inlet port via a first conduit and pushing the valve in blocking direction by the pressure therein, and a pressure variable relief valve for relieving a pressurized fluid in the intermediate pressure chamber to the outlet port via a second conduit.

摘要翻译： PCT No.PCT / JP95 / 01546 Sec。 371日期1997年2月4日 102（e）日期1997年2月4日PCT提交1995年8月3日PCT公布。 公开号WO96 / 04482 日期1996年2月15日压力补偿阀构造有一个阀门，建立和阻止入口和出口之间的连通，压力接收室，由受压室内的负载压力驱动的活塞，并将阀门 中间压力接收室，其经由第一导管与入口端口连通，并通过其中的压力推动阀阻挡方向;以及压力可变安全阀，用于将中压室中的加压流体经由 第二个管道。

公开(公告)号：US5701796A

公开(公告)日：1997-12-30

申请号：US687444

申请日：1996-08-14

申请人： Toshiro Takano ,  Mitsumasa Akashi

发明人： Toshiro Takano ,  Mitsumasa Akashi

IPC分类号： E02F9/22 ,  B60K17/10 ,  F15B11/00 ,  F15B11/05 ,  F15B11/16 ,  F15B13/00 ,  F15B13/08

CPC分类号： F15B13/0839 ,  F15B11/16 ,  F15B13/0896 ,  F15B2211/20553 ,  F15B2211/25 ,  F15B2211/30535 ,  F15B2211/3059 ,  F15B2211/315 ,  F15B2211/351 ,  F15B2211/50527 ,  F15B2211/50563 ,  F15B2211/5151 ,  F15B2211/6051 ,  F15B2211/6058 ,  F15B2211/6355 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/78

摘要： In a hydraulic apparatus for traveling, a left direction switching valve is formed by forming a spool bore having a pump port, an actuator port and a return port in a first valve block, and by disposing a spool within the spool bore for establishing and blocking communication of respective of the ports to another of the ports, a right direction switching valve is formed by forming a spool bore having a pump port, an actuator port and a return port in a second valve block, and by disposing a spool within the spool bore for establishing and blocking communication of respective of the ports to another of the ports, and a switching valve is formed by forming a spool bore having a primary port and a drain port in a third valve block, and by disposing a spool within the spool bore for establishing and blocking communication between respective of the ports and another of the ports. The first and second valve blocks are respectively connected with the third valve block to communicate respective of the return ports and the drain port.

摘要翻译： PCT No.PCT / JP95 / 00317 Sec。 371日期：1996年8月14日 102（e）日期1996年8月14日PCT提交1995年2月28日PCT公布。 公开号WO95 / 23260 日期：1995年8月31日在用于行进的液压装置中，通过在第一阀块中形成具有泵口，致动器端口和返回端口的阀芯孔，并且通过在阀芯内设置阀芯来形成左转换切换阀 用于建立和阻止各个端口与另一个端口的通信的孔，右方向切换阀通过在第二阀块中形成具有泵口，致动器端口和返回端口的卷轴孔而形成，并且通过布置 阀芯内的阀芯，用于建立和阻止各端口与另一端口的连通，并且通过在第三阀块中形成具有主端口和排出端口的阀芯孔形成切换阀，并且通过处理 阀芯内的阀芯，用于建立和阻止相应端口与另一端口之间的通信。 第一阀块和第二阀块分别与第三阀块连接，以使回流端口和排放端口相互连通。

公开(公告)号：US5794510A

公开(公告)日：1998-08-18

申请号：US617758

申请日：1996-03-15

申请人： Toshiro Takano ,  Yoichi Netsu ,  Mitsumasa Akashi

发明人： Toshiro Takano ,  Yoichi Netsu ,  Mitsumasa Akashi

IPC分类号： E02F9/22 ,  F15B11/16

CPC分类号： E02F9/2225 ,  E02F9/2296

摘要： A pressurized fluid feed system including a pressure compensating valve and directional control valve disposed between a hydraulic pump and a boom cylinder, and a pressure compensating valve and a directional control valve disposed between the hydraulic pump and a turning motor. Each pressure compensating valve comprise a check valve section and a pressure reduction valve section. The check valve section has an inlet port connected to the said hydraulic pump, an outlet port connected to the directional control valve, a spool for establishing and blocking communication between the inlet and outlet ports and a pressure chamber for applying pressure to the spool. The pressure reduction valve section has a first port connected to the said hydraulic pump, a second port connected to a reservoir, and a spool for establishing and blocking communication between the first and second ports. The check valve section of the pressure compensating valve for the turning motor allows a variable flow rate when the turning motor is singly operated and is moved to provide a fixed throttled flow when the boom cylinder and the turning motor are simultaneously operated. There is a check valve (118) connected between the pump and both the pressure chamber (63a) and the first port (42), which prevents communication between the pump and both the pressure chamber and the first port, when the boom cylinder and the turning motor are simultaneously operated.

摘要翻译： PCT No.PCT / JP94 / 01607 Sec。 371日期：1996年3月15日 102（e）1996年3月15日PCT 1994年9月28日PCT公布。 出版物WO95 / 09282 日期1995年04月6日一种压力流体供给系统，包括设置在液压泵和动臂缸之间的压力补偿阀和方向控制阀，以及设置在液压泵和转向马达之间的压力补偿阀和方向控制阀。 每个压力补偿阀包括止回阀部分和减压阀部分。 止回阀部分具有连接到所述液压泵的入口端口，连接到方向控制阀的出口端口，用于建立和阻断入口和出口之间的连通的阀芯以及用于向阀芯施加压力的压力室。 减压阀部分具有连接到所述液压泵的第一端口，连接到储液器的第二端口和用于建立和阻断第一和第二端口之间的连通的阀芯。 用于转动电动机的压力补偿阀的止回阀部分允许当转动电动机单独操作时可变的流量，并且当动臂液压缸和转动电动机同时操作时移动以提供固定节流。 连接在泵与压力室（63a）和第一端口（42）之间的止回阀（118），当止回阀缸和第一端口（42）处于与压力室和第一端口两者之间的连通时， 转动马达同时运转。