Title:
SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2020/022177
Kind Code:
A1
Abstract:
In the present invention, during the contraction stroke of a piston rod a working fluid in a cylinder lower chamber is introduced into a back pressure chamber via the outer periphery of an extension-side main valve; therefore, it is not necessary to arrange a plurality of disks and a check valve in order to form a passage for introducing working fluid in the cylinder lower chamber on the upstream side into the back pressure chamber during the contraction stroke. Thus, the axial length of a shaft section of the piston rod, and consequently the overall length of the cylinder, can be reduced, and the size of the shock absorber can be reduced.
Inventors:
YAMAOKA FUMIYUKI (JP)
Application Number:
PCT/JP2019/028226
Publication Date:
January 30, 2020
Filing Date:
July 18, 2019
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F16F9/508; F16F9/348
Domestic Patent References:
| WO2015050241A1 | 2015-04-09 |
Foreign References:
| JP2005344911A | 2005-12-15 | |||
| JP2008256129A | 2008-10-23 | |||
| JP2016183702A | 2016-10-20 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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