Title:
DAMPER DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/171655
Kind Code:
A1
Abstract:
Provided is a damper device that can reduce a piston operation force when the piston is moving in a return direction opposite the damper braking direction. This damper device 10 is provided with a cylinder 20, a rod 30, a piston 40 with an annular groove 50, and a sealing ring 60, wherein: in the bottom portion of the annular groove 50, a deep bottom portion 51 and a shallow bottom portion 52 are provided; the sealing ring 60 has an outer peripheral surface provided with a cylinder contact portion that makes contact with the inner peripheral surface of the cylinder 20 and an inner peripheral surface provided with a shallow bottom portion contact portion that makes contact with the shallow bottom portion 52; the center of the cylinder contact portion and the center of the shallow bottom portion contact portion are shifted in the axial direction; and when the piston 40 moves in the damper braking direction F1, the inner peripheral surface of the sealing ring 60 does not contact the deep bottom portion 51.
Inventors:
SAITO JUN (JP)
Application Number:
PCT/JP2023/008516
Publication Date:
September 14, 2023
Filing Date:
March 07, 2023
Export Citation:
Assignee:
PIOLAX INC (JP)
International Classes:
F16F9/02; F16F9/32; F16F9/34; F16J15/18; F16J15/3204
Foreign References:
| EP1219854A1 | 2002-07-03 | |||
| JPH02129424A | 1990-05-17 | |||
| JPH0484971U | 1992-07-23 | |||
| JP2006189151A | 2006-07-20 | |||
| JP2015230017A | 2015-12-21 |
Attorney, Agent or Firm:
DELOITTE TOHMATSU IP FIRM (JP)
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