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:
Apr. 27, 2021
Filed:
Jul. 13, 2017
Bridgestone Corporation, Tokyo, JP;
Hiroshi Kojima, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
An anti-vibration device () of the present invention includes a cylindrical first attaching member () and a second attaching member (), an elastic body (), and a partition member () which is configured to partition a liquid chamber () in the first attaching member into a main liquid chamber () and an auxiliary liquid chamber (). The partition member includes a membrane () that forms a part of the partition wall of the main liquid chamber, and an intermediate chamber () which is located on a side opposite to the main liquid chamber with the membrane therebetween and has a membrane as a part of a partition wall of the main liquid chamber. In the partition member, a first orifice () through which the main liquid chamber and the auxiliary liquid chamber communicate with each other, and a second orifice () through which the intermediate chamber and the auxiliary liquid chamber communicate with each other, and a common opening () which forms an opening on the auxiliary liquid chamber side of each of the first orifice () and the second orifice () are formed.