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:
Sep. 23, 2025
Filed:
Oct. 11, 2022
Bridgestone Corporation, Tokyo, JP;
Shingo Oono, Tokyo, JP;
Shungo Fujita, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
A hydraulic actuator includes a tube capable of being expanded and contracted by fluid pressure, a sleeve covering the tube, a pair of sealing members that seal both ends of the tube in an axial direction thereof, and plural inner pieces aligned inside the tube so as to be adjacent to each other. The plural inner pieces include a restraint side where adjacent inner pieces are in contact with each other in the tube whose inside is not pressurized by the fluid pressure and a swing side where a gap is made at an opposed position to the restraint side to allow the adjacent inner pieces to swing with respect to each other. The plural inner pieces further include a restraint mechanism that keeps the adjacent inner pieces in contact with each other on the restraint side in the tube whose inside is pressurized by the fluid pressure.