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. 29, 2020
Filed:
Jun. 16, 2017
Bridgestone Corporation, Tokyo, JP;
Akira Ueki, Tokyo, JP;
Yuki Satake, Tokyo, JP;
Masakazu Nagasawa, Tokyo, JP;
Yasuyuki Nagashima, Tokyo, JP;
Hideki Sugawara, Tokyo, JP;
Shingo Oono, Tokyo, JP;
BRIDGESTONE CORPORATION, Chuo-ku, Tokyo, JP;
Abstract
A vibration-damping device () of the present invention includes a first attachment member (), a second attachment member (), an elastic body (), and a partition member (). In the partition member, a restriction passage () through which the first liquid chamber () and the second liquid chamber () communicate with each other is formed. The restriction passage includes a first communicating portion () which opens to the first liquid chamber, a second communicating portion () which opens to the second liquid chamber, and a main body flow passage () through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes () which are disposed in a flow passage direction of the main body flow passage. A ratio of a projected area or an opening area of a smallest cross section of the fine holes, which occupies per a predetermined area of the first barrier or the second barrier, gradually decreases as it separates from the other of the first communicating portion and the second communicating portion in the flow passage direction.