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公开(公告)号：US20210190164A1
公开(公告)日：2021-06-24
申请号：US16332566
申请日：2017-01-16
Applicant: SHOWA CORPORATION
Inventor： Nobuyuki MURAGUCHI , Takao YAMAMOTO , Naoki SENOU
Abstract: The rebound spring structure includes: a rebound spring; a lower rebound collar configured to hold an end on one side of the rebound spring; and an upper rebound collar configured to hold an end on the other side of the rebound spring, the rebound spring structure being positioned around a rod configured to move relative to a cylinder. The lower rebound collar is held by a piston rod. The upper rebound collar is movably fitted to the piston rod. The upper rebound collar includes a recess on an upper disk part configured to restrict movement of the rebound spring to the other side, the recess being configured to facilitate movement of the upper rebound collar in a circumferential direction of the piston rod.
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公开(公告)号：US20170016506A1
公开(公告)日：2017-01-19
申请号：US15118008
申请日：2014-05-20
Applicant: Showa Corporation
Inventor： Naoki SENOU , Kenichiro KANEKO
CPC classification number: F16F9/5126 , F16F9/185 , F16F9/32 , F16F9/3481
Abstract: A piston section includes a valve seat that forms a first compression-side oil path through which oil flows in accordance with relative movement of a piston rod against a first cylinder, a first compression-side valve section that performs opening-closing of the first compression-side oil path of the valve seat, an inner annular section annularly formed as projecting in the axial direction of the valve seat from the valve seat toward the first compression-side valve, and an extending section that extends in the radial direction of the valve seat from an outer side of the inner annular section to a position at the inner side from a second oil path opening of the first compression-side oil path and projects in the axial direction from the valve seat toward the first compression-side valve section.
Abstract translation: 活塞部包括形成第一压缩侧油路的阀座，所述第一压缩侧油路根据活塞杆相对于第一气缸的相对运动而流动，第一压缩侧阀部，其进行第一压缩的开闭 所述阀座的油路，从所述阀座朝向所述第一压缩侧阀在所述阀座的轴向突出地环状地形成的内环状部，以及沿所述阀的径向延伸的延伸部， 从内环形部分的外侧到第一压缩侧油路的第二油路开口的内侧的位置，并从阀座朝向第一压缩侧阀部沿轴向突出。
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公开(公告)号：US20170248188A1
公开(公告)日：2017-08-31
申请号：US15405445
申请日：2017-01-13
Applicant: Showa Corporation
Inventor： Naoki SENOU
CPC classification number: F16F9/3482 , F16F9/3214
Abstract: One embodiment provides a pressure buffer device including: a cylinder that stores fluid; a flow path forming portion that forms a flow path; and an opening-closing portion that opens and closes the flow path of the flow path forming portion. The fluid flows through the flow path forming portion in accordance with relative movement of a rod with respect to the cylinder in an axial direction of the cylinder. The flow path forming portion includes an annular first protruded portion and an annular second protruded portion protruded in the axial direction in opposite sides respectively. The second protruded portion has an axial end located at a radially outer side of the first protruded portion, and a tilt portion formed at least at a part of a radially-inner part of the second protruded portion.
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