公开(公告)号：US20240198884A1

公开(公告)日：2024-06-20

申请号：US18545066

申请日：2023-12-19

申请人： Hyva Holding B.V.

发明人： Nikhil MURALI KRISHNAA ,  Ajinkya Hemant DANGE

IPC分类号： B60P1/16 ,  F15B1/26 ,  F15B13/02 ,  F15B15/18 ,  F15B15/24 ,  F15B19/00

CPC分类号： B60P1/162 ,  F15B1/26 ,  F15B13/027 ,  F15B15/18 ,  F15B15/24 ,  F15B19/00

摘要： A hydraulic cylinder assembly comprising: a single-acting hydraulic cylinder; an oil tank; a fluid line fluidically connecting the oil tank with the hydraulic cylinder; and a motor unit comprising a pump disposed in the fluid line and comprising a motor configured to operate the pump to pump fluid from the oil tank to the hydraulic cylinder to extend the hydraulic cylinder, and to permit flow of fluid from the hydraulic cylinder to the oil tank through the pump during retraction of the hydraulic cylinder, a pressure sensor configured to output a pressure signal indicative of pressure of hydraulic fluid in the hydraulic cylinder; and a controller configured to control the motor unit based on pressure signals received from the pressure sensor. The hydraulic cylinder assembly is configured so that oil leaving the hydraulic cylinder, during retraction of the hydraulic cylinder, passes through the pump to the oil tank.

公开(公告)号：US11953030B2

公开(公告)日：2024-04-09

申请号：US18056920

申请日：2022-11-18

申请人： STILL GmbH

发明人： Markus Schwab

IPC分类号： F15B11/17 ,  B66F9/22 ,  F15B13/02 ,  F15B15/18

CPC分类号： F15B11/17 ,  B66F9/22 ,  F15B13/027 ,  F15B15/18

摘要： A hydraulic system (1) for an industrial truck, in particular an electrically operated, battery-powered industrial truck, includes a lift drive (2) to raise and lower a load handling device. The hydraulic system (1) has a first hydraulic pump (5) which is configured to supply the lift drive (2) with hydraulic fluid, and a second hydraulic pump (6) which can be switched on by means of a valve device (7) for the supply of the lift drive (2). The first hydraulic pump (5) and the second hydraulic pump (6) are configured as a hydraulic double pump unit (1) and the valve device (7) is integrated into the hydraulic double pump unit (10).

公开(公告)号：US20240102494A1

公开(公告)日：2024-03-28

申请号：US18476168

申请日：2023-09-27

申请人： Dana Motion Systems Italia S.R.L.

发明人： Manuel BEZZI

IPC分类号： F15B13/02 ,  F15B1/26

CPC分类号： F15B13/025 ,  F15B1/265 ,  F15B13/026 ,  F15B13/027

摘要： The present disclosure relates to a hydraulic circuit, comprising:



a motion control valve including a valve spool and a hydraulic actuator for actuating the valve spool, and
a hydraulic control device having an outlet fluidically connected to the hydraulic actuator, the hydraulic control device comprising a pressure-reducing valve or a pressure compensated flow control valve.

公开(公告)号：US20240084823A1

公开(公告)日：2024-03-14

申请号：US18269235

申请日：2021-12-27

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Akihiro KONDO ,  Yoshiyuki TODE ,  Hideyasu MURAOKA

IPC分类号： F15B13/02 ,  E02F9/22

CPC分类号： F15B13/027 ,  E02F9/2203 ,  E02F9/2267 ,  E02F9/2271 ,  E02F9/2275 ,  E02F9/2285 ,  E02F9/2296

摘要： A hydraulic excavator drive system (1) includes an arm control valve (31) and an arm switching valve (41). The arm switching valve (41) is connected to an arm pushing supply line (34) by a rod-side line (42) and to an arm crowding supply line (35) by a head-side line (43). The arm switching valve (41) is switched between a neutral position, a recycling position in which the arm switching valve (41) allows the rod-side line (42) to communicate with the head-side line (43) and a second tank line (44), and a meter-out control position in which the arm switching valve (41) allows the head-side line (43) to communicate with the tank line (44). The arm switching valve (41) incorporates therein a check valve (45) that allows a flow from the rod-side line (42) toward the head-side line (43) when the arm switching valve (41) is in the recycling position.

公开(公告)号：US11867589B2

公开(公告)日：2024-01-09

申请号：US17346591

申请日：2021-06-14

申请人： Swagelok Company

发明人： William H. Glime, III

IPC分类号： G01M3/02 ,  F15B21/10 ,  F15B15/14 ,  F15B15/22 ,  F15B13/02 ,  F16K37/00 ,  F15B15/20 ,  F15B19/00 ,  F16K3/12 ,  F15B20/00 ,  F15B11/064 ,  F16K31/12

CPC分类号： G01M3/02 ,  F15B13/024 ,  F15B13/027 ,  F15B15/1409 ,  F15B15/204 ,  F15B15/22 ,  F15B19/005 ,  F15B21/10 ,  F16K31/12 ,  F16K37/0041 ,  F15B11/064 ,  F15B20/005 ,  F15B2211/30505 ,  F15B2211/40507 ,  F15B2211/50518 ,  F15B2211/50545 ,  F15B2211/5151 ,  F15B2211/5153 ,  F15B2211/555 ,  F15B2211/632 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7052 ,  F15B2211/857 ,  F15B2211/864 ,  F15B2211/865 ,  F15B2211/8606 ,  F15B2211/87 ,  F15B2211/8855

摘要： In an exemplary method of monitoring performance of a fluid driven actuator for a valve, pressurized fluid is supplied through an actuator supply line to an inlet port of the actuator during a first time period to operate the actuator from a normal position to an actuated position. Pressure changes corresponding to a fluid flow condition in the actuator supply line are measured during the first time period, with the measured pressure changes defining a valve cycle pressure profile including a first inflection point corresponding to movement of the actuator from the normal position to the actuated position. The valve cycle pressure profile is analyzed to identify a non-compliant condition in at least one of the valve and the actuator. An output communicating the identified non-compliant condition is then generated.

公开(公告)号：US11852173B1

公开(公告)日：2023-12-26

申请号：US18207768

申请日：2023-06-09

申请人： Syed Mutahir Hussain ,  Shu Wang

发明人： Syed Mutahir Hussain ,  Shu Wang

IPC分类号： F15B15/06 ,  F04C2/16 ,  F15B15/18 ,  F15B13/02 ,  F15B1/04 ,  F15B15/08

CPC分类号： F15B15/068 ,  F04C2/16 ,  F15B1/04 ,  F15B13/024 ,  F15B13/027 ,  F15B15/18 ,  F04C2240/40 ,  F04C2240/50 ,  F15B15/088

摘要： A screw-pump type electro-hydraulic actuator preferably includes an electric motor device, a hydraulic tube, a pump piston, a spline rod, an actuator rod and a hydraulic control circuit. The electric motor device preferably includes an electric motor and a gearbox. One end of the spline rod is engaged with an output of the gearbox. The pump piston preferably includes a piston base, three sets of screw pump rollers, a spline drive gear, a first piston end plate and a second piston end plate. The hydraulic flow circuit includes a first relief valve, a first check valve, a second relief valve, a second check valve and an accumulator. The screw pump rollers are rotatably retained in the piston base between the first and second piston end plates. The spline gear drives the pump driven gears of the three drive screw pump rollers through the spline drive gear to pump hydraulic oil.

公开(公告)号：US11795944B1

公开(公告)日：2023-10-24

申请号：US17300544

申请日：2021-08-10

申请人： John D. Oliverio ,  Amit Patel ,  Edward J. Shynski ,  Christopher Smith

发明人： John D. Oliverio ,  Amit Patel ,  Edward J. Shynski ,  Christopher Smith

IPC分类号： F15B11/22 ,  F04C2/08 ,  F15B7/00 ,  F15B9/08 ,  F15B9/10 ,  F15B9/16 ,  F15B13/02 ,  F15B13/08

CPC分类号： F04C2/08 ,  F15B7/006 ,  F15B9/08 ,  F15B9/10 ,  F15B9/16 ,  F15B11/22 ,  F15B13/024 ,  F15B13/027 ,  F15B13/0807 ,  F15B7/00 ,  F15B13/02

摘要： A hydraulic pump to synchronize the operation of a pair of hydraulic actuators wherein each hydraulic actuator comprises a cylinder including a first fluid port and a second fluid port formed in the proximal and distal end portions thereof respectively and having a piston disposed therein coupled to a piston rod at least partially disposed within the corresponding cylinder. The dual hydraulic pump includes a triple gear assembly to alternately feed pressurized hydraulic fluid to the first fluid port of each hydraulic actuator simultaneously or the second fluid port of each hydraulic actuator simultaneously to synchronize the linear movement of each piston and piston rod in a first direction or a second direction.

公开(公告)号：US11781663B2

公开(公告)日：2023-10-10

申请号：US18048109

申请日：2022-10-20

申请人： SMC CORPORATION

发明人： Kenji Fukushima

IPC分类号： F16K15/18 ,  F16K15/02 ,  F15B13/02

CPC分类号： F16K15/1826 ,  F15B13/027 ,  F16K15/021 ,  F16K15/026

摘要： [Solution] A pilot check valve includes a first body that has input and output ports, a main path 13 that is in communication these ports, and a check valve element that allows a flow of a pressure fluid from the input port toward the output port. The valve element blocks or allows a flow toward the input port side by supply or discharge of a pilot fluid and has a residual pressure exhaust path connected between the main path and an exhaust hole, a seal member that is provided in the exhaust path, and a push rod that moves the check valve element to a position where a flow of a pressure fluid toward the input port side in the main path is allowed and moves the seal member to a position where a flow toward the exhaust hole is allowed.

公开(公告)号：US11732734B2

公开(公告)日：2023-08-22

申请号：US17731531

申请日：2022-04-28

申请人： HAWE Hydraulik (Wuxi) Co., Ltd. ,  HAWE Hydraulik SE

发明人： Changfa Huang

IPC分类号： F15B13/08 ,  F15B13/02

CPC分类号： F15B13/0807 ,  F15B13/027 ,  F15B13/086 ,  F15B13/0857 ,  F15B2211/3056 ,  F15B2211/30505 ,  F15B2211/526

摘要： A hydraulic control system includes a first hydraulic cylinder, a second hydraulic cylinder, a fluid supply apparatus, a first control valve bank, a second control valve bank, a third control valve bank, and a first check valve. The first control valve bank is configured to independently control the first hydraulic cylinder; the second control valve bank is configured to independently control the second hydraulic cylinder; and the third control valve bank is configured to synchronously control the first hydraulic cylinder and the second hydraulic cylinder. Synchronous volume control is implemented through series connection of the hydraulic cylinders, and has quite high synchronization precision, which is measured to be up to two percent.

公开(公告)号：US11731574B2

公开(公告)日：2023-08-22

申请号：US17318970

申请日：2021-05-12

申请人： Advanced Concepts in Manufacturing LLC

发明人： Mike Syrcle ,  Eric Wellington

IPC分类号： F15B13/02 ,  A63G31/00 ,  B60R21/02 ,  F15B15/14 ,  F15B15/06 ,  F15B13/044 ,  B60R21/00 ,  F15B13/04

CPC分类号： B60R21/02 ,  A63G31/00 ,  F15B13/027 ,  F15B13/044 ,  F15B15/06 ,  F15B15/1433 ,  F15B15/1442 ,  B60R2021/0097 ,  F15B2013/0409 ,  F15B2211/30505

摘要： Passenger restraint systems are provided. The restraint systems can include: a passenger seat supported by a frame; a restraint bar pivotably attached to the frame; and at least one piston operably engaged between the restraint bar and the frame. Restraint system pistons are provided. The pistons can include: a central chamber housing a piston head and rod; a fluid reservoir in fluid communication with the central chamber; and at least one electromechanical valve operable between an open and a closed position. Methods for restraining a passenger within a seat are also provided.