The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Jun. 27, 2023
Bridgestone Corporation, Tokyo, JP;
Shingo Oono, Tokyo, JP;
Kazuaki Nomura, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
A hydraulic actuator includes a cylindrical tube, a sleeve, a restricting member, first and second sealing members, and a positioning member. The tube expands and contracts with pressure of a fluid. The sleeve covers an outer circumferential surface of the tube, and is widened in radial directions by expansion of the tube while limiting elongation of the tube in an axial direction S. The restricting member is provided radially inward of the sleeve, from one side to the other side in the axial direction S, and resists compression along the axial direction but is deformable in an intersecting direction X intersecting the axial direction. The sealing members seal respective ends of the tube at the one side and other side in the axial direction S. The positioning member is provided at a circumferential direction portion of at least one of the sealing members. The positioning member positions the restricting member to follow the axial direction.