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. 01, 2026
Filed:
Sep. 07, 2023
Sumitomo Riko Company Limited, Aichi, JP;
Masaaki Hirano, Aichi, JP;
Takashi Kume, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
In a fluid-filled cylindrical vibration damping device, an inner shaft member and an outer shaft member are elastically linked by a main rubber elastic body, and fluid chambers in which a fluid is filled are provided to be in communication with each other through an orifice path. The fluid filled in the fluid chambers is a magnetic functional fluid. The fluid-filled cylindrical vibration damping device includes a magnetic unit generating a magnetic field through power conduction. Magnetic path formation members to which the magnetic field is applied by the magnetic unit are arranged on sidewall portions on two facing sides in the orifice path. A magnetic flux concentration partis provided at at least one the magnetic path formation members. A dimension of the magnetic flux concentration part in a length direction of the orifice path is reduced toward an inward side in a facing direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile