公开(公告)号：US20170204930A1

公开(公告)日：2017-07-20

申请号：US15326182

申请日：2014-09-26

申请人： KYB CORPORATION

发明人： Masahiro MIWA ,  Yusuke MATSUSHITA

IPC分类号： F16F9/32 ,  F16F9/348 ,  F16F9/19

CPC分类号： F16F9/3214 ,  B22F3/03 ,  B22F5/008 ,  B22F2003/033 ,  B60G2202/24 ,  F16F9/065 ,  F16F9/19 ,  F16F9/34 ,  F16F9/348 ,  F16F9/3481 ,  F16F9/56 ,  F16F2226/04 ,  F16F2232/08

摘要： A piston includes: a disk-shaped piston body; an annular valve seat axially projecting from a first end of the piston body; and at least one port axially extending from the area inside the annular valve seat in the first end of the piston body to a second end of the piston body, and the port has a cross-sectional shape of a rounded rectangular having two arc-shaped opposite sides on one circle, the cross-sectional shape being the same all the way along the piston body.