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:
Mar. 18, 2008
Filed:
Mar. 09, 2006
Atsushi Muramatsu, Komaki, JP;
Hajime Maeno, Kasugai, JP;
Mutsumi Muraoka, Kasugai, JP;
Hironori Koyama, Kasugai, JP;
Satoshi Umemura, Kamo-gun, JP;
Atsushi Muramatsu, Komaki, JP;
Hajime Maeno, Kasugai, JP;
Mutsumi Muraoka, Kasugai, JP;
Hironori Koyama, Kasugai, JP;
Satoshi Umemura, Kamo-gun, JP;
Tokai Rubber Industries, Ltd., Komaki, JP;
Abstract
A fluid-filled type vibration-damping device having a movable rubber plate housed within a partition member partitioning a pressure-receiving chamber and an equilibrium chamber from each other. The movable rubber plate is moved owing to the pressure difference between the two chambers. The movable rubber plate comprises the movable rubber plate formed of a generally disk shaped rubber elastic body having formed thereon in alternating fashion concave grooves and convex ribs each extending in a circumferential direction about a same center axis, the convex ribs have tapered cross section gradually narrowing in width towards an distal end thereof, and the concave grooves and convex ribs are disposed at the same locations in a diametrical direction on either face of the movable rubber plate so that the thickness of the movable rubber plate is varied in the circumferential direction.