Title:
PISTON FOR BUFFER DEVICE AND BUFFER DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/188285
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a piston that is for a buffer device and that can suppress sound generated during passage of oil. A piston (100) comprises: a body (110) which is cylindrical and through which a first through-hole (113) and a second through-hole (114) are formed in an axial direction; and a seat (120) which protrudes from the axial-direction end surface (111) of the body (110) in the axial direction and on which a flat plate-like valve sits. The seat (120) has: a bottom surface (127) in which an opening (128) of a through-hole (125) formed at a position opposite to the first through-hole (113) is formed; a seat surface (124) which is provided around the bottom surface (127) so as to protrude from the bottom surface (127) and on which the valve sits; and an intermediate part (130) provided between the end surface (111) and the seat surface (124).
Inventors:
SHINOZAKI TOMOAKI (JP)
NAITO TSUTOMU (JP)
NAITO TSUTOMU (JP)
Application Number:
PCT/JP2022/016557
Publication Date:
October 05, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F16F9/32; F16F9/348
Foreign References:
| JP2000257659A | 2000-09-19 | |||
| JP2014098465A | 2014-05-29 | |||
| JP2004239344A | 2004-08-26 | |||
| JP2019178692A | 2019-10-17 |
Attorney, Agent or Firm:
OGATA, Fumio (JP)
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