公开(公告)号：US20240308047A1

公开(公告)日：2024-09-19

申请号：US18670408

申请日：2024-05-21

申请人： Milwaukee Electric Tool Corporation

发明人： James G. Ballard ,  James O. Myrhum, JR.

IPC分类号： B25F5/00 ,  B23D17/06 ,  B23D29/00 ,  F15B15/14 ,  F16K17/16 ,  F16K17/38

CPC分类号： B25F5/005 ,  B25F5/00 ,  F15B15/1447 ,  F16K17/162 ,  B23D17/06 ,  B23D29/002 ,  F16K17/16 ,  F16K17/383

摘要： Embodiments of the invention provide a ram assembly for a hydraulic tool. The ram assembly includes a ram piston having a ram cavity. The ram piston receives a hydraulic pressure reaction force. The ram assembly further includes an overload assembly disposed in the ram cavity or in a cavity defined by a manifold. The overload assembly includes a burst disc positioned at a first end of the ram cavity or manifold, a lock nut positioned at a second end of the ram cavity or manifold, and a spacer positioned between the burst disc and the lock nut. The spacer transfers a supporting force applied to the lock nut to the burst disc. The hydraulic pressure reaction force and the supporting force both act in the same direction, and thus, are additive forces acting on the burst disk.

公开(公告)号：US11999042B2

公开(公告)日：2024-06-04

申请号：US17051396

申请日：2020-08-28

申请人： Milwaukee Electric Tool Corporation

发明人： James G. Ballard ,  James O. Myrhum, Jr.

IPC分类号： B25F5/00 ,  F15B15/14 ,  F16K17/16 ,  B23D17/06 ,  B23D29/00 ,  F16K17/38

CPC分类号： B25F5/005 ,  B25F5/00 ,  F15B15/1447 ,  F16K17/162 ,  B23D17/06 ,  B23D29/002 ,  F16K17/16 ,  F16K17/383

摘要： Embodiments of the invention provide a ram assembly for a hydraulic tool. The ram assembly includes a ram piston having a ram cavity. The ram piston receives a hydraulic pressure reaction force. The ram assembly further includes an overload assembly disposed in the ram cavity or in a cavity defined by a manifold. The overload assembly includes a burst disc positioned at a first end of the ram cavity or manifold, a lock nut positioned at a second end of the ram cavity or manifold, and a spacer positioned between the burst disc and the lock nut. The spacer transfers a supporting force applied to the lock nut to the burst disc. The hydraulic pressure reaction force and the supporting force both act in the same direction, and thus, are additive forces acting on the burst disk.

公开(公告)号：US20240124166A1

公开(公告)日：2024-04-18

申请号：US17967582

申请日：2022-10-17

申请人： Maxar Space LLC

发明人： Varouj Baghdasarian

IPC分类号： B64G1/64 ,  F15B15/14 ,  F15B15/20

CPC分类号： B64G1/645 ,  F15B15/1447 ,  F15B15/204 ,  B64G2001/643

摘要： Technology is disclosed herein for preventing or at least significantly reducing shock to spacecraft such as satellites when releasing a hold-down rod assembly that clamps the spacecraft to, for example, a launch vehicle adaptor. The hold-down rod assembly has tension rods that may be pre-loaded at considerable tension in order to hold down a stack of spacecraft in a launch configuration. In an embodiment, pneumatic actuators are used to slowly release the tension in the tension rods. Therefore, shock to the spacecraft is prevented or at least significantly reduced.

公开(公告)号：US20240068493A1

公开(公告)日：2024-02-29

申请号：US18457675

申请日：2023-08-29

申请人： Zehnder & Sommer AG

发明人： Erich LOHNER ,  Urs FANKHAUSER

IPC分类号： F15B21/00 ,  F15B15/14

CPC分类号： F15B21/00 ,  F15B15/1447 ,  F15B15/1457 ,  B65H20/02

摘要： The present invention relates to a pressing cylinder for a material conveying device, in particular for a roller feed, comprising: a piston rod which is configured to engage with a movable component of the material conveying device; a cylinder space which is configured to at least partially guide the piston rod; a piston which is arranged in the cylinder space and which is connected to the piston rod; and a motor; wherein the piston rod comprises a first piston rod element and a second piston rod element which are configured such that a rotational movement of the first piston rod element causes a translational movement of the second piston rod element relative to the piston; wherein the motor is configured to cause the rotational movement of the first piston rod element.

公开(公告)号：US20240035495A1

公开(公告)日：2024-02-01

申请号：US17877728

申请日：2022-07-29

申请人： KMT Waterjet Systems, Inc.

发明人： Shajan Varghese Chacko

IPC分类号： F15B15/14

CPC分类号： F15B15/1447 ,  F15B15/1433

摘要： One or more components of a high pressure pump include a hydraulic surge dampener. The hydraulic surge dampener mitigates or prevents damage that results from a sudden pressure surge that results from impact of components, for example a hydraulic piston and a hydraulic head, of the high pressure pump. The hydraulic surge dampener may include one or more grooves, one or more through holes, or a combination thereof. The hydraulic surge dampener may be carried by or be part of one or more components of the high pressure pump, such as the hydraulic piston, the hydraulic head, or both.

公开(公告)号：US20240017705A1

公开(公告)日：2024-01-18

申请号：US18304889

申请日：2023-04-21

申请人： Robert Bosch GmbH

发明人： Andreas Weh ,  Florian Breyer ,  Harald Guggenmos ,  Martin Hagspiel

IPC分类号： B60T8/40 ,  F15B15/14

CPC分类号： B60T8/409 ,  F15B15/1447

摘要： In a pedal feel simulator, in particular for a vehicle brake system, with a piston guided axially displaceably in a cylinder bore against a spring force, the piston is designed in two parts from a first piston part and a second piston part, wherein the first piston part is adapted to be designed identically across several pedal feel simulator types, and the second piston part is designed with at least one different axial dimension across several pedal feel simulator types.

公开(公告)号：US20230175530A1

公开(公告)日：2023-06-08

申请号：US17924085

申请日：2021-05-07

申请人： Seoung Il Park

发明人： Seoung Il Park

IPC分类号： F15B11/032 ,  F15B15/14

CPC分类号： F15B11/0325 ,  F15B15/1447

摘要： A hydraulic booster using a variable-volume piston includes a main cylinder configured such that, if a fluid introduced into the upper portion of a main piston is pressurized by a pressurizing means, the fluid in the lower portion of the main piston is output. A guide moves downwards separately from the main piston and then moves to the original position by a return means. A variable-volume piston is integrally assembled on the guide such that the volume thereof increases during a downward movement and decreases during an upward movement, thereby changing the volume of the upper side of the main piston. A fluid storage-and-supply unit connects to fluid channels in the upper and lower portions of the main cylinder. This configuration boosts the pressure of the fluid discharged through the lower portion of the main cylinder due to a volume change caused by upward/downward movements of the variable-volume piston.

公开(公告)号：US20190242443A1

公开(公告)日：2019-08-08

申请号：US16232256

申请日：2018-12-26

申请人： HONDA MOTOR CO., LTD.

发明人： Nobutaka YAMAGUCHI ,  Kenji NIWATA

IPC分类号： F16D25/08 ,  F15B15/14

CPC分类号： F16D25/083 ,  F15B15/1447

摘要： A clutch mechanism switches a clutch to one of an engaging state and a released state by a piston operated by an oil pressure. The piston includes a first side surface portion configured to press the clutch, and a second side surface portion on which the oil pressure acts. The second side surface portion has an uneven shape in a circumferential direction.

公开(公告)号：US20180319000A1

公开(公告)日：2018-11-08

申请号：US15772588

申请日：2016-11-02

申请人： GUSTAV KLAUKE GMBH

发明人： Egbert Frenken ,  Andreas Lehr

IPC分类号： B25F5/00 ,  F15B15/14 ,  F15B15/20 ,  F15B15/22

CPC分类号： B25F5/005 ,  B23D29/002 ,  B25B27/026 ,  B25B27/10 ,  B26F1/34 ,  F15B15/1447 ,  F15B15/204 ,  F15B15/22 ,  F15B15/225 ,  F15B15/226 ,  F15B2211/7052 ,  F15B2211/755

摘要： The invention relates to a hydraulically actuated piston (9) guided in a cylinder (8), and to a hydraulic working tool (1) having a working head (2), wherein the piston (9) has an impact surface (15) which borders an impact space (16) on the piston side provided between the piston (9) and the cylinder (8), and wherein hydraulic fluid (17) can act on the impact surface (15) by increasing the impact space (16) in order to move the piston (9) in an impact direction (r), and the piston (9) forms a limiting device (25) for a through-flow of the hydraulic fluid (17). According to the invention, in order to design a hydraulic piston guided in a cylinder or a hydraulic working tool in such a way that no undue signs of wear occur even during working processes with the sudden disappearance of the counter pressure, a hydraulic chamber (19) filled with the hydraulic fluid (17) is formed in the impact direction (r) after the limiting device (25), wherein a volume of the hydraulic chamber (19) is reduced according to the increase in the impact space (16), by means of the displacement of hydraulic fluid (17) out of the hydraulic chamber (19) and into the impact space (16) via the limiting device (25).

公开(公告)号：US20180266450A1

公开(公告)日：2018-09-20

申请号：US15922866

申请日：2018-03-15

申请人： Honda Motor Co.,Ltd.

发明人： Tomoaki MUKAI ,  Shunsuke YOSHIDA

IPC分类号： F15B15/26 ,  F15B15/14 ,  F16H63/34 ,  F16D41/16

CPC分类号： F15B15/261 ,  F15B15/1447 ,  F16D41/16 ,  F16H3/66 ,  F16H63/3023 ,  F16H63/3416 ,  F16H63/3483 ,  F16H63/38 ,  F16H2200/0069 ,  F16H2200/2012 ,  F16H2200/2046 ,  F16H2200/2048 ,  F16H2200/2066 ,  F16H2200/2082

摘要： An actuator in which the abrasion of a piston and a cylinder can be prevented and it is difficult for the smooth movement of the piston to be hindered is provided. The actuator includes a cylinder (51), a piston (52) that moves inside the cylinder (51) according to a supplied fluid pressure, and a detent mechanism (54) that fixes a position of the piston (52) until the fluid pressure exceeds a predetermined value. The detent mechanism (54) includes a first elastic member 54a and a second elastic member 54b which are arranged to face each other with an axis (a) of the piston (52) interposed therebetween and press the piston (52) so as to sandwich the piston (52) therebetween.