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1. 发明公开

EP0753691A4 PILOT PRESSURE OPERATED DIRECTIONAL CONTROL VALVE AND OPERATION CYLINDER CONTROL DEVICE 失效
标题翻译： FOR工作缸先导操作阀和控制设备
公开(公告)号：EP0753691A4
公开(公告)日：1997-10-22
申请号：EP95913379
申请日：1995-03-29
申请人： KOMATSU MFG CO LTD
发明人： IKEI KAZUNORI , TAKA KEISUKE
IPC分类号： E02F9/22 , F15B13/04 , F16K11/07
CPC分类号： E02F9/2267 , E02F9/2271 , F15B13/0402 , Y10T137/8663 , Y10T137/87225 , Y10T137/87241
摘要： A pilot pressure operated directional control valve wherein a spool hole having a port is formed in a housing, a spool being slidably fitted in the spool hole such that it is caused to slide by means of a spring and by virtue of pilot pressure led into a pressure receiving chamber, the control valve being characterized in that a spring box is provided on an end surface of the housing as viewed in a longitudinal direction of the spool, and that the spring box has a void portion incorporating therein the spring and constituting the pressure receiving chamber and a pilot pressure intake port communicating with the void portion and made open in the longitudinal direction of the spool.

2. 发明公开

EP0747601A4 PRESSURE OIL SUPPLY SYSTEM HAVING A PRESSURE COMPENSATING VALVE 失效
标题翻译：阀门DRUCKKOMPENSIERENDEM压力油供给系统
公开(公告)号：EP0747601A4
公开(公告)日：1995-08-08
申请号：EP93923052
申请日：1993-10-22
申请人： KOMATSU MFG CO LTD
发明人： ISHIHAMA KAZUYOSHI , IKEI KAZUNORI , UEHARA KAZUO
IPC分类号： E02F9/22 , F15B11/16 , F15B13/00 , F15B13/04 , F15B13/08 , F15B11/00 , F15B11/05
CPC分类号： F15B13/0839 , E02F9/2225 , E02F9/2232 , E02F9/2267 , E02F9/2271 , E02F9/2285 , E02F9/2296 , F15B11/16 , F15B13/0417 , F15B2211/20553 , F15B2211/275 , F15B2211/30535 , F15B2211/3054 , F15B2211/351 , F15B2211/6054 , F15B2211/6058 , F15B2211/633 , F15B2211/6355 , F15B2211/71 , Y10T137/87169 , Y10T137/87185
摘要： A direction control valve device comprising a direction control valve made by providing in a valve block a main spool for establishing and/or shutting off communication between an input port, first and second actuator ports and first and second tank ports, and a pressure compensating valve made by providing in said valve block a check valve section and a pressure reducing valve section so that pressure oil in a pump port is pressure compensated with loading pressure to thereby be supplied to said input port, wherein a plurality of said valve blocks are connected to each other and respective first and second tank ports are made to communicate with respective pump ports, wherein a main input port is connected to one of said pump ports, and wherein one of said first and second tank ports is connected to a main tank port.

3. 发明公开

EP0737815A4 UNLOADING DEVICE FOR A HYDRAULIC CIRCUIT 失效
标题翻译：放电装置技术HYDRAUSLISCHEN电路
公开(公告)号：EP0737815A4
公开(公告)日：1999-06-16
申请号：EP95903926
申请日：1994-12-21
申请人： KOMATSU MFG CO LTD
发明人： IKEI KAZUNORI , TAKA KEISUKE
IPC分类号： F15B11/00 , E02F9/22 , F15B11/05 , F16K17/04
CPC分类号： E02F9/2267 , E02F9/2225 , Y10T137/2635 , Y10T137/87185
摘要： An unloading device comprising an unloading valve for discharging a part of supplied pressure oil into a tank and a switch valve for discharging pressure oil (for pressing the unloading valve in a direction in which the flow rate from the tank) is reduced into the tank, wherein the two valves are disposed in series in the axial direction on a valve main body.

4. 发明公开

EP0751300A4 PRESSURE COMPENSATING VALVE AND PRESSURE OIL SUPPLY DEVICE USING SAID PRESSURE COMPENSATING VALVE 失效
标题翻译：溢流阀和输油设备具有相似的减压阀
公开(公告)号：EP0751300A4
公开(公告)日：1999-06-16
申请号：EP95912421
申请日：1995-03-15
申请人： KOMATSU MFG CO LTD
发明人： TAKA KEISUKE , IKEI KAZUNORI
IPC分类号： F15B11/00 , E02F9/22 , F15B11/05 , F15B11/16 , F15B13/04
CPC分类号： F15B11/165 , E02F9/2232 , F15B11/05 , F15B11/168 , F15B13/0417 , F15B2211/20553 , F15B2211/30535 , F15B2211/3111 , F15B2211/31511 , F15B2211/31576 , F15B2211/329 , F15B2211/351 , F15B2211/355 , F15B2211/6058 , F15B2211/7053 , F15B2211/71

5. 发明公开

EP0913586A4 HYDRAULIC OIL SUPPLY APPARATUS 失效
标题翻译：设备技术供应液压油
公开(公告)号：EP0913586A4
公开(公告)日：2000-09-20
申请号：EP97933016
申请日：1997-07-24
申请人： KOMATSU MFG CO LTD
发明人： IKEI KAZUNORI , YAMASHITA KOUJI , SHINOZAKI SHINICHI , TAKA KEISUKE , MOTOTANI MASAYOSHI
IPC分类号： E02F9/22 , F15B11/02 , F15B11/00
CPC分类号： E02F9/2267 , E02F9/2225 , E02F9/2239 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： In order that the speed of a boom operating cylinder can be increased when a hydraulic motor for swinging and the boom operating cylinder are simultaneously operated, discharged hydraulic oil from a first hydraulic pump (1) is supplied to the boom operating cylinder (7) by means of directional control valves (3) provided with pressure compensating valves (21), and discharged pressure oil from a second hydraulic pump (30) to the hydraulic motor (40) for swinging, by means of a specific directional control valve (33). This discharged hydraulic oil from the second hydraulic pump (30) is joined with the discharged hydraulic oil from the first hydraulic pump (1) via a check valve (42) and a change-over valve (43). When swinging is started, part of the pressure oil from the second hydraulic pump (30) is supplied to the boom operating cylinder (7) without allowing the pump pressure of the second hydraulic pump (30) to increase to a level exceeding that of the pressure in the boom operating cylinder, and without allowing the hydraulic oil from the pump (30) to flow out into a tank.

6. 发明公开

EP0753424A4 TRAVELLING HYDRAULIC DEVICE 失效
标题翻译：液压驱动系统
公开(公告)号：EP0753424A4
公开(公告)日：1997-07-02
申请号：EP95913378
申请日：1995-03-29
申请人： KOMATSU MFG CO LTD
发明人： IKEI KAZUNORI , TAKA KEISUKE
IPC分类号： E02F9/22 , B60K17/10 , B62D11/18 , F15B11/00 , F15B11/05 , F15B13/02
CPC分类号： F15B13/02 , B60K17/10 , B62D11/183
摘要： A travelling hydraulic device characterized in that left and right direction change-over valves are provided for supplying pressure oil to left and right travelling hydraulic motors, that a spool hole having a pump port, an actuator port and a return port is formed in a first valve body, a spool for establishing and cutting off communications between the respective ports being fitted in the spool hole to thereby constitute the left direction change-over valve, that a spool hole having a pump port, an actuator port and a return port is formed in a second valve body, a spool for establishing and cutting off communications between the respective ports being fitted in the spool hole to thereby constitute the right direction change-over valve, that a spool hole having an inlet port and tank port is formed in a third valve body, a spool for establishing and cutting off communications between the respective ports being fitted in the spool hole to thereby constitute a switch valve by providing pressure receiving chambers at ends of the spool and that the first and second valve bodies are connected to the third valve body so as to establish communications between the respective return ports and the inlet port to thereby introduce a negative pressure of the left and right travelling hydraulic motors into the both pressure receiving chambers.

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