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公开(公告)号：US10024342B2
公开(公告)日：2018-07-17
申请号：US14898161
申请日：2015-04-13
申请人： KYB Corporation
发明人： Takeshi Terao , Masayuki Nakamura
摘要： A pump discharge amount is divided in accordance with switch amounts of respective switch valves by leading load pressures of actuators to which compensator valves are connected to respective first pressure chambers of the compensator valves, leading a maximum load pressure selected by a selection unit to respective second pressure chambers of the compensator valves, and controlling respective openings of the compensator valves in accordance with respective pressure actions between the respective pressure chambers. A drain passage is provided to connect the first pressure chamber of the compensator valve to a tank, and a flow dividing ratio modification valve is provided to control a pressure in the first pressure chamber.
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公开(公告)号：US11137081B2
公开(公告)日：2021-10-05
申请号：US16619323
申请日：2018-09-28
申请人： KYB Corporation
IPC分类号： F16K11/07 , F15B13/042
摘要： A control valve includes a housing formed with first and second supply ports, first and second actuator ports, and a pilot port, and a spool accommodated slidably in the housing, and the spool is configured to allow the first supply port and the pilot port to communicate with each other both at the first communication position and the second communication position.
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公开(公告)号：US11047400B2
公开(公告)日：2021-06-29
申请号：US16622981
申请日：2018-09-28
申请人： KYB Corporation
摘要： A fluid pressure control device includes a switching valve, a main pilot passage and a sub pilot passage, the switching valve is configured to be switched to the open position when the working fluid is supplied to the pilot chamber, and to be switched to the throttled position with opening on the downstream side of the switching valve in the neutral passage, and the sub pilot passage is provided with a throttle portion and a check valve in parallel in the throttle portion.
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公开(公告)号：US11339884B2
公开(公告)日：2022-05-24
申请号：US16637608
申请日：2018-12-03
申请人： KYB Corporation
发明人： Takeshi Terao , Atsushi Fujii , Nobuyoshi Yoshida
摘要： A valve device includes a relief valve configured to be opened when a pressure in a fluid pressure circuit reaches a predetermined pressure and to relieve a working fluid, a tank passage connected to a tank, a main relief passage connecting the relief valve and the tank passage, and a sub relief passage branching from the main relief passage and connected to the tank passage separately from the main relief passage.
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公开(公告)号：US10578132B2
公开(公告)日：2020-03-03
申请号：US15552538
申请日：2015-09-14
申请人： KYB Corporation
IPC分类号： F15B13/02 , F15B11/028 , F15B11/16 , F15B13/06
摘要： A fluid pressure control device includes a switching valve that has a pilot chamber to which the working oil is supplied from the supply passage through the second control valve, and a first relief valve that is provided on the downstream side of the switching valve. The second control valve allows supply of the working oil to the pilot chamber in a case where a flow of the working oil to a tilt cylinder is allowed, and blocks the supply of the working oil to the pilot chamber in a case where the flow of the working oil to the tilt cylinder is blocked. The switching valve allows a flow of the working oil to the first relief valve in a case where the working oil is supplied to the pilot chamber, and blocks the flow of the working oil to the first relief valve in a case where the supply of the working oil to the pilot chamber is blocked.
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公开(公告)号：US10180149B2
公开(公告)日：2019-01-15
申请号：US15120907
申请日：2015-02-25
申请人： KYB Corporation
发明人： Syota Mizukami , Takeshi Terao
摘要： A control valve device includes a valve body having an actuator port connected to an actuator and a relief passage configured to allow the actuator port to communicate with a return passage, a spool slidably assembled into the valve body and configured to allow the actuator port to selectively communicate with a supply side or a return side, a relief valve configured to open/close the relief passage to control pressure of the actuator port, and an on/off valve assembled into an assembling hole which is formed in the valve body. The on/off valve configured to allow the actuator port to communicate with the relief passage through the assembling hole at the time of valve open.
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公开(公告)号：US10408358B2
公开(公告)日：2019-09-10
申请号：US15518821
申请日：2015-10-27
申请人： KYB Corporation
发明人： Shota Mizukami , Takeshi Terao , Akio Matsuura
摘要： A compensator spool of a load sensing valve device includes a pressure chamber, a compensator throttle portion, a pressure introduction chamber, a pressure introduction port, a maximum load pressure introduction chamber, and a selector valve. A groove is formed around the pressure introduction port, and a groove moves relatively between a passage communicating with an actuator to reduce an opening area of the pressure introduction port when the compensator spool moves.
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公开(公告)号：US10107309B2
公开(公告)日：2018-10-23
申请号：US15522284
申请日：2015-10-08
申请人： KYB Corporation
发明人： Shota Mizukami , Takeshi Terao , Akio Matsuura
摘要： A compensator spool of a load sensing valve device has a pressure chamber, a compensator throttle portion, a pressure introduction chamber, a pressure introduction port, a maximum load pressure introduction chamber, and a selector valve. A groove is formed around the pressure introduction port, and a groove moves relatively to a passage communicating with an actuator so as to reduce an area of an opening of the pressure introduction port when the compensator spool moves.
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