公开(公告)号：US20230375065A1

公开(公告)日：2023-11-23

申请号：US18031526

申请日：2021-11-30

Applicant: KYB Corporation

Inventor： Yasunori KOBAYASHI ,  Kenshirou ANAI

IPC: F16F9/19 ,  F16F9/36 ,  F16F9/32

CPC classification number: F16F9/19 ,  F16F9/36 ,  F16F9/3214

Abstract: A shock absorber in the present invention includes: a cylinder; a rod guide fitted to the inner circumference of an end portion of the cylinder; a piston rod movably inserted into the cylinder; a piston connected to the piston rod; and a seal member stacked on the rod guide and through which the piston rod is inserted, wherein the seal member includes: an annular seal case having an annular concave portion on the inner circumference; a seal ring including a base portion and a lip and accommodated in the annular concave portion; an annular seal holder stacked on the rod guide side of the base portion, accommodated in the annular concave portion, and supporting the outer circumference of the seal ring to suppress the diameter enlargement of the lip; and a stopper mounted on the seal case and preventing the seal holder and the seal ring from falling off.

公开(公告)号：US20180180132A1

公开(公告)日：2018-06-28

申请号：US15738283

申请日：2016-06-08

Applicant: KYB Corporation

Inventor： Yasunori KOBAYASHI ,  Kazunori MASUMOTO ,  Takao MURATA ,  Kazuyuki MAMIYA

IPC: F16F9/06 ,  F16F9/32

Abstract: A mono-tube shock absorber includes a cylinder, a piston slidably inserted into the cylinder, a piston rod coupled to the piston, an upper component group detachably attached to an end portion at a side of an extension-side chamber of the cylinder, a tube that is disposed inside a contraction-side chamber and has one end secured to an end portion at a side of the contraction-side chamber of the cylinder, a valve mechanism detachably attached to the other end side of the tube to partition a reservoir inside the tube, and a free piston that partitions the reservoir into a liquid chamber and a gas chamber.

公开(公告)号：US20180135718A1

公开(公告)日：2018-05-17

申请号：US15572394

申请日：2016-06-08

Applicant: KYB Corporation

Inventor： Yasunori KOBAYASHI ,  Takao MURATA

IPC: F16F9/32

CPC classification number: F16F9/32 ,  F16F9/5126 ,  F16F9/516

Abstract: Provided is a unidirectional shock absorber without losing a damping force reducing effect even with continuous input of high-frequency vibrations. A shock absorber includes: a piston partitioning a cylinder into an extension chamber and a compression chamber; a pressure chamber; a free piston slidably inserted into the pressure chamber; a spring element; an extension chamber-side passage; a compression chamber-side passage; a valve provided to the extension chamber-side passage and configured to offer resistance to a flow from a side closer to the extension chamber to a side closer to the compression chamber; and a check valve provided in parallel with the valve, allowing only a flow from the side closer to the compression chamber to the side closer to the extension chamber, wherein the shock absorber generates a damping force only at the time of elongation.