公开(公告)号：US11865051B2

公开(公告)日：2024-01-09

申请号：US18097777

申请日：2023-01-17

Applicant: Stryker Corporation

Inventor： Chad C. Souke ,  Ross T. Lucas

IPC: A61G1/056 ,  F15B13/01 ,  F15B11/042 ,  A61G1/02

CPC classification number: A61G1/0567 ,  A61G1/0212 ,  A61G1/0262 ,  F15B11/0423 ,  F15B13/015 ,  F15B2211/45

Abstract: An apparatus includes a hydraulic circuit that is configured to selectively open fluid communication between one portion of the hydraulic circuit and another portion of the hydraulic circuit, such as a reservoir, based on the flow of the hydraulic fluid in the one portion. When the flow of hydraulic fluid exceeds a selected threshold in the one portion of the hydraulic circuit, the flow of fluid urges the opening of a hydraulic component of the hydraulic circuit to allow fluid communication between the one portion and the reservoir to discharge fluid from the one portion.

公开(公告)号：US11466706B2

公开(公告)日：2022-10-11

申请号：US17054065

申请日：2019-04-23

Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA

Inventor： Hiroaki Fujiwara ,  Noboru Ito ,  Hiroshi Itoh

IPC: F16K11/07 ,  F15B13/04 ,  F15B13/01

Abstract: A valve device that changes the direction of flow of a hydraulic fluid supplied to and discharged from a cylinder mechanism to actuate the cylinder mechanism, the valve device including: a control valve including a main spool axially movable between different positions; a lock valve including a plunger and a pressure chamber; and a selector valve including a selector spool operable in conjunction with the main spool to axially move between different positions, the selector spool being located adjacent to the main spool and having an axis crossing an axis of the main spool.

公开(公告)号：US20210231246A1

公开(公告)日：2021-07-29

申请号：US17209889

申请日：2021-03-23

Applicant: Scott Grove

Inventor： Scott Grove

IPC: F16L37/413 ,  F15B13/01 ,  B23P19/04 ,  F15B20/00 ,  F16L37/28

Abstract: A method and system for reducing leakage of hydraulic oil from a hydraulic outlet on a tractor, which involves removal of the female quick connect coupler from a legacy original equipment selective control valve and inserting into the void the following: a three part insert with a front stepped diameter segment, a back section, which is screwed into front stepped diameter segment, a sleeve which is configured to be inserted after a front O-ring is adjusted and a leading portion of a retention bolt.

公开(公告)号：US10753377B2

公开(公告)日：2020-08-25

申请号：US16611849

申请日：2017-09-12

Applicant: SHIMADZU CORPORATION

Inventor： Masafumi Kakio

IPC: F15B13/04 ,  F15B13/01 ,  F15B13/02 ,  F15B11/00 ,  B66F9/22

Abstract: A lock valve including a poppet valve element which is disposed within a spring chamber, a spring which biases the poppet valve element leftward, and a valve seat which comes into contact with the poppet valve element is disposed in a cavity formed in a valve body to mount a relief valve therein and is positioned further inward than the sleeve of the relief valve. The outer peripheral portion of the poppet valve element has hole portions formed therein at regular intervals. The outer peripheral portion of the valve seat, too, has hole portions formed therein at regular intervals. The valve portion of a solenoid valve is disposed between a passage which is in communication with the spring chamber and a passage which is in communication with a second flow passage open to a low-pressure region such as a hydraulic tank.

公开(公告)号：US10392782B2

公开(公告)日：2019-08-27

申请号：US15535052

申请日：2014-12-29

Applicant: VOLVO CONSTRUCTION EQUIPMENT AB

Inventor： Man-Seuk Jeon ,  Bon-Seuk Ku

IPC: E02F9/22 ,  F15B11/08 ,  F15B11/00 ,  F15B13/01 ,  F15B13/02 ,  F15B13/04 ,  E02F3/42

Abstract: A control valve is provided for construction equipment having a holding valve which prevents the natural lowering of an operation apparatus due to the dead weight of the operation apparatus when an actuator is in a neutral position. The control valve includes a valve body, a spool, a holding valve, a control valve, and a pilot pressure control valve. The control valve can save manufacturing cost as well as allow better use of space for construction equipment.

公开(公告)号：US10247209B2

公开(公告)日：2019-04-02

申请号：US15326299

申请日：2015-07-15

Applicant: WALVOIL S.P.A.

Inventor： Davide Mesturini ,  Massimiliano Musiani

IPC: F15B11/16 ,  F15B11/00 ,  F15B13/01 ,  E02F3/32 ,  E02F9/22

Abstract: Hydraulic system, distributor and bidirectional valve to activate the hydraulic actuators (3; 3a, 3b) of an operating machine; the hydraulic system (1) having: a first high-pressure oil delivery (4); an oil drain (8); a slide valve with a spool, which is axially sliding and is suited to control a hydraulic actuator (3); a second low-pressure oil delivery (6); an activation valve (15); and a bidirectional valve (21) with a first passage opening (22) that can be hydraulically connected, by the slide valve (9) to the first delivery (4) and a second passage opening (23) hydraulically connected to the actuator (3); wherein, the bidirectional valve has an inlet opening (24) that can be connected, by the activation valve (15) to the second delivery (6) and an outlet opening (25) that can be connected, by the spool (12) to the drain (8).

公开(公告)号：US20190063015A1

公开(公告)日：2019-02-28

申请号：US16174742

申请日：2018-10-30

Applicant: Safe Rack LLC

Inventor： Jeff W. Reichert ,  Jeffrey David Scott

IPC: E01D19/00 ,  F15B15/20 ,  F15B15/14 ,  E01D15/02 ,  F15B1/24 ,  F15B13/01

CPC classification number: E01D19/00 ,  B66F9/04 ,  E01D15/02 ,  F15B1/24 ,  F15B13/01 ,  F15B15/149 ,  F15B15/202 ,  F15B2201/31 ,  F15B2211/30515 ,  F15B2211/50518

Abstract: A gangway comprising a fixed platform. A support structure is connected to the fixed platform in a manner that allows the support structure to rotate with respect to the fixed platform. A releasable position locking assembly that inhibits rotation of the support structure in a raising direction is also provided. The releasable locking assembly includes a closed-loop fluid arrangement.

公开(公告)号：US20190032680A1

公开(公告)日：2019-01-31

申请号：US16073020

申请日：2017-03-30

Applicant: LOHR INDUSTRIE

Inventor： Jean-Luc Andre

IPC: F15B13/01 ,  F16K15/04

Abstract: The security unit ensures, by blocking the hydraulic flow, that the rod of a cylinder is held in position. It includes two preferably twinned isolation devices, each mounted on one of the hydraulic lines supplying fluid to a chamber of the cylinder. Each isolation device includes two series-connected ball-check valves allowing the flow in the direction of inlet of the fluid into the respective chamber; and a longitudinal, separate rod, inserted between the balls but not linked thereto, and capable of being slidably guided towards each of the balls and driving same. The rod is too short to contact both balls simultaneously when the two valves are closed; but it is sufficiently long to push the ball of the second valve, thereby causing it to open, when it slides under the pushing action of the ball of the first valve upon the latter being controlled to be opened.

公开(公告)号：US10132059B2

公开(公告)日：2018-11-20

申请号：US15101060

申请日：2014-12-02

Applicant: KYB Corporation

Inventor： Syunsuke Kubo

IPC: F15B13/00 ,  E02F9/22 ,  F15B13/01 ,  E02F3/42 ,  F15B11/08 ,  F15B13/042 ,  E02F3/32

Abstract: A fluid pressure control device includes a load holding mechanism that is configured to hold the load pressure of the load side pressure chamber. The load holding mechanism includes a switching valve having a communication passage configured to be blocked from the third pressure chamber by the second land section in a case where the spool is closed, and providing communicate between the second supply port and the discharge port in accordance with the movement of the spool in the valve opening direction. In a case where the spool is moved in the valve opening direction, at the same time when or after the second supply port communicates with the discharge port via the communication passage, the first land section is brought into sliding contact with the annular projecting section and the first supply port and the discharge port are blocked from each other.

公开(公告)号：US10047771B2

公开(公告)日：2018-08-14

申请号：US14802277

申请日：2015-07-17

Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.

Inventor： Hidenori Tanaka ,  Kensuke Ishikura ,  Koji Ueda ,  Takaaki Izuka

IPC: F15B13/01 ,  E02F3/43 ,  E02F9/22 ,  F15B11/10 ,  F15B13/042 ,  F15B21/08 ,  F15B11/00

Abstract: A hydraulic excavator includes control valves connected to a head-side chamber of a boom cylinder, an operating unit configured to switch the control valves, lock valves each provided between the head-side chamber and each of the control valves, and an operation control unit that controls the operation of the lock valves. The lock valves each have a valve element that is configured to move between a locking position at which the discharge of hydraulic oil from the head-side chamber is restricted and an unlocking position at which the discharge of the hydraulic oil from the head-side chamber is allowed. The operation control unit controls the operation of the lock valves so that the valve elements move from the locking position to the unlocking position at different points in time when the operating unit is operated.