Title:
ROTARY DAMPER AND VALVE, AND METHOD FOR PREVENTING REDUCTION IN TORQUE OF ROTARY DAMPER CAUSED BY WEAR OF VALVE
Document Type and Number:
WIPO Patent Application WO/2023/199810
Kind Code:
A1
Abstract:
[Problem] To prevent a reduction in the torque of a rotary damper caused by the wear of a valve. [Solution] The present invention provides a rotary damper characterized by comprising a valve (3) that includes: a first end surface (3a) facing a first surface (4a) closing off one end of an oil chamber (4); a second end surface (3b) facing a second surface (4b) closing off another end of the oil chamber (4); a back surface (3c) facing a curved surface (4c) of the oil chamber (4); and a valve part (3d) that closes an oil path (5) formed between a rotor (2) and the valve part, the valve preventing oil injected into the oil chamber (4) from flowing in reverse through the oil path (5) by means of the valve part (3d) closing the oil path (5), wherein the valve (3) has recess/protrusions (3k, 3l) on the back surface (3c), the recess (3k) of the recess/protrusions (3k, 3l) forms a gap (6) between the curved surface (4c) and the recess, the cross-sectional area of the gap (6) is reduced by the wear of the protrusions (3l) of the recess/protrusions (3k, 3l), and the function of the valve part (3d) is not harmed by the wear of the protrusions (3l).
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Inventors:
OZAKI KEIGO (US)
YAMADA DAISUKE (JP)
YAMADA DAISUKE (JP)
Application Number:
PCT/JP2023/014052
Publication Date:
October 19, 2023
Filing Date:
April 05, 2023
Export Citation:
Assignee:
SOMIC MAN HOLDINGS INC (JP)
International Classes:
E05F5/00; F16F9/14; A47K13/12
Domestic Patent References:
| WO2012141242A1 | 2012-10-18 |
Foreign References:
| JP2014224582A | 2014-12-04 | |||
| JPH07301272A | 1995-11-14 |
Attorney, Agent or Firm:
SENDA PATENT BUREAU (JP)
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