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公开(公告)号：US20240353023A1
公开(公告)日：2024-10-24
申请号：US18760634
申请日：2024-07-01
发明人： Bo Chen , Brian Walther
IPC分类号： F16K31/163 , E21B21/10 , E21B23/00 , E21B34/10 , E21B34/14 , F15B15/06 , F16K17/04 , F16K31/122
CPC分类号： F16K31/163 , E21B21/10 , E21B23/004 , E21B34/10 , E21B34/103 , E21B34/14 , F15B15/06 , F16K31/122 , F16K17/04
摘要： A core rod has internal and external profiles disposed in a housing assembly. A power spring in cooperation with the core rod within the housing assembly is connected to a power spring stopper that is fixed to the housing assembly with at least one shear screw. An inner axial cycling piston bar includes an external profile for mating engagement with the internal profile of the core rod. The inner axial cycling piston bar is connected to a piston in cooperation with a cycling spring, and the piston is configured to move in an upward direction. When a downward force exerted by the cycling spring exceeds the upwardly applied cycling force, the piston, the inner axial cycling piston bar, and the external profile move in a downward direction, thereby causing the core rod to move an incremental distance in the downward direction, which compresses the power spring by the incremental distance.
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公开(公告)号：US12055163B2
公开(公告)日：2024-08-06
申请号：US17924257
申请日：2021-05-11
申请人： PONSSE OYJ
发明人： Toni Auvinen , Marko Halonen , Tommi Liukkunen
CPC分类号： F15B15/065 , F15B15/02 , F15B15/1419
摘要： A pressure medium cylinder (1) for moving a toothed bar (3), comprising a toothed bar (3) on at least one side of which is formed a toothing (4). Inside the toothed bar (3), a cavity (6, 6a, 6b) is formed, extending to at least one end (7a, 7b) of the toothed bar. The pressure medium cylinder (1) further comprises a longitudinal structure (8, 8a, 8b), the longitudinal structure (8, 8a, 8b) and the toothed bar (3) being adapted movably in relation to each other, and the longitudinal structure (8, 8a, 8b) is adapted at least partly inside said cavity (6, 6a, 6b). The toothed bar (3) and longitudinal structure (8, 8a, 8b) are adapted in a sealed manner in relation to each other so that the toothed bar and the longitudinal structure are movable in relation to each other by the effect of a pressure medium.
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公开(公告)号：US12023120B2
公开(公告)日：2024-07-02
申请号：US16969926
申请日：2019-03-08
申请人： VERSITECH LIMITED
发明人： Ziyang Dong , Ka Wai Kwok , Ziyan Guo , Kit Hang Brian Lee
CPC分类号： A61B34/37 , F15B15/06 , F15B15/1423 , F15B15/1452 , A61B2034/2051 , A61B2090/031 , A61B2090/374
摘要： Systems and methods for an effective solution to MR safe actuation in all MRI-guided (robot-assisted) procedures are provided. The present integrated hydraulic transmission method or system uses piston-based cylinders (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) to provide continuous bi-lateral rotation with unlimited range in an MRI environment. Positional and torque control can also be achieved. The system includes a master unit and a slave unit each comprising: a plurality of cylinders (101,102,201,308(C1), 309(C2), 310(C3), 402, 501), a piston (105,301,302,303,401,502) inserted within the bottom surface of each cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501), a seal positioned with each cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) between the piston (105,301,302,303,401,502) and the top surface of the cylinder (101,102,201,308(C1), 309(C2), 310(C3), 402, 501) to inhibit a fluid from passing across the seal, and a plurality of tubes (103) connecting the master unit cylinders and slave unit cylinders (402).
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4.发明公开公开(公告)号：US20240151249A1
公开(公告)日：2024-05-09
申请号：US18405276
申请日：2024-01-05
申请人： Machnet SG PTE.LTD.
CPC分类号： F15B15/065 , A61B10/0041 , F15B11/12 , F15B11/127 , A61B2010/0208
摘要： A pneumatic stepper motor includes a housing, said housing accommodating at least part of: a rack or geared axle comprising a plurality of gear elements; and two pistons, each comprising at least two teeth, said pistons being arranged to cooperate with said rack or geared axle. The racks may either be straight or curved. The pistons are preferably double-acting pistons. A device includes at least one, and preferably a plurality of, such pneumatic stepper motor(s). The device may in particular be an MRI-compatible robotic system, more in particular for example an MRI-guided breast biopsy device.
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公开(公告)号：US11969888B2
公开(公告)日：2024-04-30
申请号：US16052106
申请日：2018-08-01
CPC分类号： B25J9/104 , B25J9/123 , B25J9/144 , B25J17/00 , B25J19/0029 , B25J19/0041 , F15B15/06 , Y10S901/09 , Y10S901/21 , Y10S901/28
摘要： Cable routing approaches are described that allow cables to pass through a traditional chain joint without reducing the strength capacity or impairing the range of motion of the joint. The cable routing approaches permit the cables to be housed inside the structure of the robotic arm and pass through the chain joint in a manner that does not limit the width of the chain.
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公开(公告)号：US11927249B2
公开(公告)日：2024-03-12
申请号：US17457560
申请日：2021-12-03
申请人： Woodward, Inc.
摘要： The subject matter of this specification can be embodied in, among other things, a linear-to-rotary apparatus that includes a linear actuator having an actuator housing including a piston chamber, a piston shaft disposed in the piston chamber, and a rotor apparatus. The rotor apparatus includes a rotary joint defining a rotational axis, a rotor arm extending radially from the rotary joint and configured to at least partially pivot about the rotary joint, and a torque linkage pivotably connected to the rotor arm. The torque linkage is also attached to an end of the piston shaft of the piston at a pivot connection joint, where the pivot connection joint defines a pivot axis that is substantially perpendicular to the translation axis of the piston shaft.
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公开(公告)号：US11906056B2
公开(公告)日：2024-02-20
申请号：US16532960
申请日：2019-08-06
申请人： Ratier-Figeac SAS
发明人： Frédéric M. Vermande
CPC分类号： F16K11/07 , F15B13/00 , F15B13/0402 , F15B15/06
摘要： An apparatus for monitoring the pressurisation of a control valve for a hydraulic actuator and a control valve. The apparatus including a spool movable along an axis (X), wherein the spool is configured to control the flow of hydraulic fluid through the control valve based on its position along the axis (X), and wherein in an unpressurised state of the control valve the spool occupies a first axial position, and in a pressurised state of the control valve the spool occupies a second, different axial position. The apparatus also including a position sensor configured to monitor the position of the spool within the control valve and detect whether the spool occupies the first axial position or the second axial position, wherein the first axial position and the second axial position correspond to neutral positions of the spool.
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公开(公告)号：US20240003365A1
公开(公告)日：2024-01-04
申请号：US18370265
申请日：2023-09-19
发明人： Markus KROLL , Axel KUHN
摘要： The invention relates to a pivot actuator (1), comprising: a housing (2); a piston (3) that is supported in the housing (2) and displaceable along a longitudinal axis (7) of the housing; a drive shalt (4) that protrudes from the housing (2) wherein the piston (3) engages the drive shaft (4) by form locking so that the drive shaft (4) is pivoted about a drive axis (8) by a pivot angle between two end positions through a displacement of the piston; and a switching cam (11) that is fixed torque proof at the drive shaft and configured to contact a stop element (5) at the housing (2) with a respective contact surface (ill) of the switch cam in the two end positions, characterized in that the switching cam (11) includes two discs (15) that are arranged adjacent to one another along the drive axis (8), wherein one respective contact surface (18) of the two contact surfaces (18) is arranged at each of the two discs (15) respectively.
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公开(公告)号：US11584625B2
公开(公告)日：2023-02-21
申请号：US16429426
申请日：2019-06-03
申请人： Snap-on Incorporated
摘要： The present invention relates broadly to a floor jack and a multi-component trunnion assembly that transfers motion of a power unit to the lifting arm of the jack. The end block may include one or more trunnions that are coupled to the block. The trunnions may engage and be coupled to one or more connection plates coupled to the lifting arm of the jack. A hydraulic power unit, including at least one piston may be coupled to the trunnion block for lifting the lifting arm of the jack.
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公开(公告)号：US20230008971A1
公开(公告)日：2023-01-12
申请号：US17782120
申请日：2020-12-02
申请人： Shailesh SHARMA
发明人： Shailesh SHARMA
摘要： Methods and systems relating to improvements in reliability of fluid power actuators are disclosed. An exemplary fluid power actuator (300) comprises, an actuator body (305) having a cylindrical cavity (310), fitted with a first end cap (315) and a second end cap (320) at longitudinal ends, a piston (325) with a piston rod (330) disposed inside the cylindrical cavity (310), wherein the actuator (300) is characterised by, a hollow tie rod (335) in the cylindrical cavity (310), wherein the hollow tie rod (335) is for conveying a pressurised fluid into a volume (A) in the cylindrical cavity (310) between the second end cap (320) and the piston (325) for exerting a force on the piston (325) for a stroke or stroke reversal. The hollow tie rod 335 serves dual purpose of holding the pressure retaining components together, providing a flow path for the fluid enabling actuator stroking and stroke reversal.
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