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:
May. 28, 2024
Filed:
Jan. 31, 2020
Prospira Corporation, Kawasaki, JP;
Hiroshi Kojima, Tokyo, JP;
Prospira Corporation, Kawasaki, JP;
Abstract
A partition member () of an anti-vibration device () includes a membrane () and an orifice passage (), the orifice passage includes a main liquid chamber-side passage () and an auxiliary liquid chamber-side passage (), the main liquid chamber-side passage and the auxiliary liquid chamber-side passage extend in a circumferential direction and are disposed at mutually different radial positions, a flow direction in the main liquid chamber-side passage and a flow direction in the auxiliary liquid chamber-side passage are opposite to each other when liquid flows through the orifice passage, a channel cross-sectional shape in at least one passage of the main liquid chamber-side passage and the auxiliary liquid chamber-side passage is a laterally long flat shape that is short in an axial direction along a central axis (O) of a first attachment member and long in a radial direction, and a ratio of a radial size to an axial size in the one passage is larger than the ratio in the other passage of the main liquid chamber-side passage and the auxiliary liquid chamber-side passage.