公开(公告)号：US11506230B2

公开(公告)日：2022-11-22

申请号：US17262846

申请日：2019-07-25

申请人： Moog BV

发明人： Herman Van Ommen ,  Jean Paul Warmerdam ,  Remco Van Der Holst

IPC分类号： F15B15/22

摘要： An actuator including a housing, an actuator rod and a snubber assembly. The actuator has an axis, the housing has a first end and an aperture positioned at the first end of the housing, and the actuator rod extends through the aperture along the axis of the actuator. The snubber assembly is mounted at the first end of the housing, and includes one or more energy absorbing devices. The snubber assembly is positioned on the housing such that an axis of each of the one or more energy absorbing devices is offset relative to the axis of the actuator. The snubber assembly is configured such that the one or more energy absorbing devices provide bidirectional end-of-stroke damping.

公开(公告)号：US20220288734A1

公开(公告)日：2022-09-15

申请号：US17636187

申请日：2020-08-13

申请人： KOSMEK LTD.

发明人： Gaku YOSHIMURA

IPC分类号： B23Q3/10 ,  F15B15/22

摘要： A support rod (3) is inserted in a housing (1) so as to be movable in an up-down direction. An actuation chamber (21) is provided in a lower end portion of the housing (1). An output member (24) is moved upward by pressurized oil supplied to the actuation chamber (21). In the actuation chamber (21), to which pressurized oil is supplied, a release spring (33) is attached between a leading end wall (31) of the actuation chamber (21) and a flange portion (25a) provided to a base end portion of the output member (24). The release spring (33) biases the output member (24) downward.

公开(公告)号：US20220213906A1

公开(公告)日：2022-07-07

申请号：US17522862

申请日：2021-11-09

申请人： J.C. BAMFORD EXCAVATORS LIMITED

发明人： Ravinder Padam ,  Roopak Sharma ,  Sanjeev Arora

IPC分类号： F15B15/14 ,  F15B15/22 ,  F16F9/19 ,  F16F9/32

摘要： A hydraulic actuator includes a body defining a bore having a first end surface, a second end surface, and a bore surface, and a piston slidable in the bore. The piston, bore surface and first end surface define a first chamber, and the piston, bore surface and second end surface define a second chamber. The body also defines an accumulator chamber and a fluid passage between the first chamber and the accumulator chamber. An accumulator is received in the accumulator chamber and a valve selectably opens and closes the fluid passage.

公开(公告)号：US11299945B2

公开(公告)日：2022-04-12

申请号：US17189314

申请日：2021-03-02

申请人： Geoffrey Warlick ,  Sean Gaudette ,  Bradley Kellogg ,  Taylor Broussard

发明人： Geoffrey Warlick ,  Sean Gaudette ,  Bradley Kellogg ,  Taylor Broussard

IPC分类号： E21B23/04 ,  F15B15/22 ,  E21B34/06

摘要： A counter including a housing disposed about a tubular creating a space therebetween, a piston disposed in the space and responsive to pressure up events in the tubular to compress a transfer chamber, a supply chamber fluidly attached to the transfer chamber; a trigger chamber fluidly attached to the transfer chamber wherein sequential pressure events cause the piston to move fluid from the supply chamber to the trigger chamber. A counter including a fluid incrementing configuration, an activation member in fluid force communication with the fluid incrementing configuration, the activation member having a first position where a fluid port is blocked and a second position where the fluid port is unblocked, the fluid port being fluid pressure connected to a tool to be actuated when the activation member is in the second position.

公开(公告)号：US11242873B2

公开(公告)日：2022-02-08

申请号：US16341332

申请日：2017-10-11

申请人： S-GUN LIMITED

发明人： David John Moodie

IPC分类号： B25C1/04 ,  F15B15/14 ,  F15B15/20 ,  F15B15/22

摘要： A pneumatic or hydraulic mechanism has a housing defining a piston chamber and having a fluid inlet port. A piston is slidable in the piston chamber. The piston partitions the piston chamber into a front chamber and a rear chamber. The piston has one or more passages for fluid communication between the rear chamber and the front chamber, the one or more passages being sealed by a sealing mechanism. The sealing mechanism has a sealing state in which the sealing mechanism substantially inhibits fluid communication between the rear chamber and the front chamber, and a non-sealing state in which the sealing mechanism allows fluid communication between the rear chamber and the front chamber. The piston is slidable between a first position and a second position. When the piston is positioned in the first position, the sealing mechanism is in the sealing state. Upon supply of a fluid to the inlet port, the fluid urges the piston to its second position and then causes the sealing mechanism to change to the non-sealing state until the pressure in the rear chamber and the front chamber equalises, allowing the sealing mechanism to return to the sealing state. Upon removal of fluid from the rear chamber, the fluid in the front chamber urges the piston to return to its first position.

公开(公告)号：US20220025913A1

公开(公告)日：2022-01-27

申请号：US17305820

申请日：2021-07-15

申请人： SMC CORPORATION

发明人： Takafumi AKITA

IPC分类号： F15B15/22 ,  F15B15/14

摘要： Cushion holes are provided in cover members, tubular cushion rings are provided on a piston and a piston rod so as to be insertable into and withdrawable from the cushion holes as the piston moves, cushion packings capable of slidably contacting the outer circumference of the cushion rings are mounted to be movable in an axial direction, in mounting grooves formed on inner walls of the cover members constituting the cushion holes, the cushion packings each include a plurality of protrusions extending from the outer circumferential surface to the side surface near the piston and disposed circumferentially alongside one another, and cushioning grooves that extend in parallel with the axis of the cushion rings and whose cross-sectional area changes are formed on the outer circumferential surface of the cushion rings.

公开(公告)号：US11173954B2

公开(公告)日：2021-11-16

申请号：US16844641

申请日：2020-04-09

申请人： Steering Solutions IP Holding Corporation

发明人： Albert C. Wong ,  Thomas C. Rytlewski ,  Jason A. Dutsky

IPC分类号： B62D5/06 ,  B62D5/12 ,  F16K15/18 ,  F15B15/22 ,  F15B15/20 ,  F15B15/24 ,  F15B15/14

摘要： A self-setting valve assembly for a power steering gear assembly includes a plug, a first plunger, a second plunger, and a biasing member. The plug extends between a first end and a second end. The plug defines a cavity that is disposed between the first end and the second end, a first bore that extends from the first end to the cavity, and a second bore that extends from the second end to the cavity. The first plunger has a first head that is disposed within the cavity and a first stem that extends from the first head through the first bore. The second plunger has a second head that is disposed within the cavity and a second stem that extends from the first head through the second bore. The biasing member is disposed within the bore and extending between the first head and the second head.

公开(公告)号：US11067104B1

公开(公告)日：2021-07-20

申请号：US17098775

申请日：2020-11-16

申请人： Caterpillar Inc.

发明人： Kurt S Goslovich ,  Thomas K. Yeung ,  Ananda S. Ponnusamy

IPC分类号： F15B15/22 ,  F15B15/14 ,  F04B53/14

摘要： An integrated piston and bearing may include a piston having an outer peripheral surface and a first end and a second end and a bearing arranged on the outer peripheral surface. The bearing may include a surface contour including a setback region with a first thickness and a full region with a second thickness, thicker than the first thickness. The bearing may also include a snubbing chamfer transitioning between the first and second thicknesses.

公开(公告)号：US11060538B2

公开(公告)日：2021-07-13

申请号：US16497971

申请日：2018-03-20

申请人： WABCO GmbH

发明人： Romain Poux ,  Timo Gerlach ,  Dennis Reimann

IPC分类号： F15B15/22 ,  F15B11/048 ,  F16H61/30 ,  F16J1/00

摘要： An actuator (1) for an automated or automatic transmission has a cylinder housing (3), a piston unit (2), and a piston rod (13). The piston unit (2) is coupled to the piston rod (13) and is arranged movably in the cylinder housing (3) along a longitudinal axis (4). The piston unit (2) separates two pressure chambers (8, 9) of variable volume in the cylinder housing (3). The pressure chambers are configured to load the piston unit (2) with compressed air on both sides. The two pressure chambers (8, 9) are connected to a valve unit (14) for switching between pressurization and purging of each of the two pressure chambers (8, 9). An end stop clamping device for damping at least one end stop of the piston unit (2) is arranged in the actuator (1). A pneumatically and a mechanically operating damping stage are provided improve the end stop damping device.

公开(公告)号：US11053961B2

公开(公告)日：2021-07-06

申请号：US16217019

申请日：2018-12-11

申请人： Novatek IP, LLC

发明人： Jonathan D. Marshall

IPC分类号： F15B15/22 ,  F15B15/14

摘要： A piston's stroke length may be restricted by passing a rod through a through hole in the piston. The stroke length's boundaries may be defined by the points where an interior of the through hole contacts an exterior of the rod. Adjusting a position or orientation of the rod may alter this stroke length. If the rod comprises a noncylindrical external geometry, a radius thereof may vary along an axial length of the rod or around a circumference thereof. Adjustment of the rod, via axial translation or rotation for example, may change the position of contact between the rod and the through hole. Alternately, the through hole may comprise a unique geometry in which the rod may radially translate to adjust the piston's stroke length.