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公开(公告)号：US10066650B2
公开(公告)日：2018-09-04
申请号：US14432756
申请日：2013-09-03
发明人： Daisuke Tanaka
CPC分类号： F15B15/149 , F15B7/006 , F15B15/1423 , F15B15/18 , F15B2211/2053 , F15B2211/20561 , F15B2211/27 , F15B2211/3051 , F15B2211/3058 , F15B2211/40507 , F15B2211/40584 , F15B2211/41563 , F15B2211/50518 , F15B2211/5159 , F15B2211/7053 , F15B2211/761 , F15B2211/785
摘要： A cylinder driving apparatus includes a first passage connecting a first chamber of a cylinder to a first port of a pump; a second passage connecting a second chamber of the cylinder to a tank; a third passage connecting a second port of the pump to the tank; a throttle configured to apply resistance to a working fluid flowing through the third passage; and an operated check valve provided in the first passage to allow the working fluid to flow from the pump into the first chamber. The operated check valve is configured to allow the working fluid to flow from the first chamber into the pump in accordance with a fluid pressure of the working fluid in the third passage between the pump and the throttle.
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公开(公告)号：US10066646B2
公开(公告)日：2018-09-04
申请号：US14764940
申请日：2014-01-15
发明人： Takayuki Ogawa
摘要： An actuator unit includes a rod side chamber and a piston side chamber defined in the cylinder by a piston; a tank; a direction control valve configured to allow a working fluid discharged from the pump to be supplied selectively to the rod side chamber and the piston side chamber; a first control passage that communicates the rod side chamber with the tank; a second control passage that communicates the piston side chamber with the tank; a first variable relief valve provided on the first control passage, the first variable relief valve being configured to have a varied valve opening pressure; a second variable relief valve provided on the second control passage, the second variable relief valve configured to have a varied valve opening pressure; and a center passage that communicates the tank with the interior of the cylinder.
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公开(公告)号：US09879777B2
公开(公告)日：2018-01-30
申请号：US14422731
申请日：2013-11-13
发明人： Yukimasa Kobayashi , Hideki Yamada , Yuta Hoshino
CPC分类号： F16J1/04 , F16F9/3214
摘要： A piston includes a disc formed to have an annular shape, a cylindrical skirt portion that projects from an outer peripheral portion of the disc on one end side in an axial direction of the disc, and a passage that is formed in the disc and that is opened on an inner side of the skirt portion. An inner peripheral surface of the skirt portion is a slope that increases its diameter toward a side opposite to the disc.
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公开(公告)号：US09879747B2
公开(公告)日：2018-01-30
申请号：US14762307
申请日：2014-01-17
发明人： Kazuhiro Tanaka
CPC分类号： F16F9/3484 , F16F9/3214
摘要： A shock absorber includes a valve disc defining two chambers, a flow passage formed in the valve disc, the flow passage allowing communication between the two chambers, a window formed in the valve disc, the window being connected to the flow passage, a valve seat formed on the valve disc, the valve seat surrounding the outer periphery of the window; and a plurality of leaf valves formed in the shape of annular plates, the plurality of leaf valves being stacked on the valve disc. The first leaf valve stacked on the valve disc is provided such that an outer peripheral part is seatable on and separable from the valve seat, and includes a rib recessed on a valve disc side and projecting on an opposite valve disc side at a position facing the valve seat.
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公开(公告)号：US09856873B2
公开(公告)日：2018-01-02
申请号：US14768673
申请日：2014-02-26
IPC分类号： F01C1/00 , F03C2/00 , F03C4/00 , F04C2/00 , F04C18/00 , F04C15/00 , F04C29/00 , F01C21/00 , F04C2/344 , F04C15/06 , F01C21/10
CPC分类号： F04C15/0061 , F01C21/108 , F04C2/344 , F04C2/3448 , F04C15/06
摘要： The vane pump includes a rotor, a plurality of slits, vanes that are respectively received in the slits, a cam ring that has an inner circumferential cam face with which tip portions of the vanes are brought into sliding contact, pump chambers that are defined by the rotor, the cam ring, and the adjacent vanes, a side member that has a sliding contact surface with which the side surface of the rotor is brought into sliding contact, a discharge port that is formed so as to open to the side member, the discharge port being configured to guide working fluid discharged from the pump chamber, and a notch that are provided on the side member so as to extend from the opening of the discharge port in direction opposite to rotating direction of the rotor. The notch is formed radially outside of the protruded portion of the rotor.
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公开(公告)号：US09810243B2
公开(公告)日：2017-11-07
申请号：US14407981
申请日：2013-08-09
发明人： Takeshi Terao , Masayuki Nakamura
IPC分类号： F15B11/024 , F15B13/04 , E02F9/22 , F15B21/14 , F15B13/02
CPC分类号： F15B11/024 , E02F9/2217 , F15B13/021 , F15B13/0403 , F15B21/14 , F15B2011/0246
摘要： A switching valve includes a spool, a first cylinder port that communicates with the piston side chamber, a second cylinder port that communicates with the rod side chamber, a bridge passage having a first opening which is adjacent to the first cylinder port and a second opening which is adjacent to the second cylinder port, a regeneration passage formed in the spool to connect the second cylinder port communicating with the rod side chamber to the first cylinder port in accordance with a switching position of the spool, and a first communication port and a second communication port formed in the spool to communicate with the regeneration passage. The first communication port communicates with the second opening of the bridge passage, which is adjacent to the second cylinder port, and the second communication port communicates with the second cylinder port in accordance with the switching position of the spool.
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公开(公告)号：US09797465B2
公开(公告)日：2017-10-24
申请号：US14442483
申请日：2014-03-10
发明人： Keiji Saito , Kazuhisa Nakamura , Takashi Teraoka
CPC分类号： F16F9/3214 , F16F9/19 , F16F9/535 , F16F2222/06 , F16F2224/045 , F16F2228/066
摘要： A piston of a magnetorheological fluid shock absorber is provided with a piston core having a small diameter portion mounted on an end portion of the piston rod, an enlarged diameter portion formed continuously in an axial direction with a diameter larger than the small diameter portion and forming a stepped portion, and a large diameter portion formed continuously in the axial direction with a diameter larger than the enlarged diameter portion and having a coil; a ring body surrounding the outer periphery of the piston core and forming a flow passage of the magnetorheological fluid between itself and the large diameter portion; a plate formed annularly and arranged on the outer periphery of the small diameter portion and mounted on one end of the ring body; and a stopper mounted on the small diameter portion and sandwiching the plate between the stopper and the stepped portion.
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公开(公告)号：US09719573B2
公开(公告)日：2017-08-01
申请号：US14652458
申请日：2014-01-29
发明人： Nobuhiro Noguchi
摘要： A shock absorber includes: a communication passage configured to cause a working fluid chamber formed in a cylinder to communicate with a reservoir for reserving a working fluid therein; a damping force generating mechanism configured to apply resistance to the working fluid passing through the communication passage; a low-speed compression-side damping adjuster configured to change a damping force when a stroke speed is in a low-speed range during compression; a high-speed compression-side damping adjuster configured to change the damping force when the stroke speed is in a high-speed range, the high-speed range representing higher speed than the low-speed range during compression; and an extension-side damping adjuster configured to change the damping force during extension. The low-speed compression-side damping adjuster, the high-speed compression-side damping adjuster, and the extension-side damping adjuster are attached to a tank side of the cylinder.
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公开(公告)号：US09695845B2
公开(公告)日：2017-07-04
申请号：US14387235
申请日：2013-02-21
发明人： Hiroshi Funato
CPC分类号： F15B15/222 , F01B11/02
摘要： A cushion mechanism for decelerating a piston rod includes a holder fastened to an end surface of a cylinder portion fitted with an inner peripheral surface of a cylinder tube, a plurality of fastening bolts for fastening the holder to the cylinder portion, an annular entry portion provided on the piston rod and advancing into the holder and the cylinder portion in the vicinity of the stroke end, a cushion passage formed by penetrating at least one of the plurality of fastening bolts and allowing a working chamber and a discharge port to communicate with each other and leading a working fluid in the working chamber to a discharge port, and an orifice portion provided on the cushion passage and applying resistance to a flow of the working fluid.
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公开(公告)号：US09683587B2
公开(公告)日：2017-06-20
申请号：US14370958
申请日：2013-01-18
发明人： Tatsuo Ito , Mitsuhiro Maesaki
CPC分类号： F15B15/08 , F15B11/003 , F15B11/006 , F15B15/20 , F15B2211/30515 , F15B2211/30535 , F15B2211/30575 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/7052
摘要： A fluid pressure control device includes a first control valve that switches to supply a working fluid to the pressure chamber of a cylinder on which a load pressure by the load acts so as to control the extension operation of the cylinder, a second control valve that switches to discharge the working fluid in the pressure chamber so as to control the contraction operation of the cylinder, an operate check valve that is interposed between the pressure chamber and the second control valve and that interrupts the discharge of the working fluid from the pressure chamber when the operate check valve is switched to a closed state and a pilot valve that performs, with a pilot pressure, a pilot operation on the second control valve and that switches, with the pilot pressure, the operate check valve to an opened state.
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