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:
Oct. 28, 2025
Filed:
Sep. 07, 2022
Sumitomo Riko Company Limited, Aichi, JP;
Shigehiro Otsubo, Aichi, JP;
Satoru Ogawa, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
Achieved is a rubber bushing for railroad trucks which has a novel structure and is capable of improving, for example, flame resistance to externally applied fire or the like without greatly degrading the basic properties demanded with respect to vibrational and load inputs. A rubber bushingused for railroad car trucks comprises a shaft-like inner memberand an outer member, disposed on the outer peripheral side of the inner memberat a remove therefrom, which are linked by a rubber elastic body. A cover partthat covers an exposed end surface, from the outside thereof, where the rubber elastic bodyis exposed to the outside between the axial ends of the inner memberand the outer member, is provided at an axial end of the rubber elastic bodyas a separate member from the rubber elastic body