US 12,337,914 B2
Linear damper and steering device
Kazumasa Nakaya, Shizuoka (JP); and Akifumi Endo, Shizuoka (JP)
Assigned to SOMIC MANAGEMENT HOLDINGS INC., Tokyo (JP)
Appl. No. 18/554,860
Filed by SOMIC MANAGEMENT HOLDINGS INC., Tokyo (JP)
PCT Filed Feb. 24, 2022, PCT No. PCT/JP2022/007703
§ 371(c)(1), (2) Date Oct. 11, 2023,
PCT Pub. No. WO2022/230336, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 2021-076911 (JP), filed on Apr. 29, 2021.
Prior Publication US 2024/0375711 A1, Nov. 14, 2024
Int. Cl. B62D 7/22 (2006.01); B62D 3/12 (2006.01)
CPC B62D 7/228 (2013.01) [B62D 3/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A linear damper comprising:
an inner chamber forming body formed in a tubular shape and having, inside a tubular portion, an inner chamber where fluid is liquid-tightly housed;
a relative displacement body slidably fitted in the inner chamber forming body and formed displaceable relative to the inner chamber forming body; and
a flow control valve provided in at least one of the inner chamber forming body or the relative displacement body to allow the fluid to flow while limiting a flow of the fluid,
wherein the linear damper is arranged between two attachment target objects linearly displaceable relative to each other to damp external force received due to relative displacement by limiting the flow of the fluid,
one of the inner chamber forming body or the relative displacement body has an attachment portion to be attached to one of the two attachment target objects,
another one of the inner chamber forming body or the relative displacement body has a bumper portion with which the other one of the two attachment target objects bumps, and
the bumper portion includes an elastic body elastically receiving bump of the other one of the two attachment target objects;
wherein the bumper portion comprises more than one bottomed holes and more than one through-holes.