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:
Dec. 27, 1994
Filed:
Aug. 23, 1993
Nobuhiro Hirasawa, Kasugai, JP;
Masaaki Mishima, Kasugai, JP;
Abstract
A fluid-filled cylindrical elastic mount is disclosed which includes an inner and an outer sleeve connected by an elastic body, and a pair of fluid chambers formed in the elastic body. A non-compressible fluid contained in the mount flows between the fluid chambers, through one of two differently tuned orifice passages defined by an orifice structure. One of the orifice passages having the higher ratio of its cross sectional area to its length is formed at least partially as a tunnel extending through a tunnel-defining portion of the orifice structure. A valve assembly including a rotary valve and a valve housing is attached to the orifice structure such that the rotary valve is located in the tunnel of the orifice passage and such that the valve housing is fixed to a radially outer surface of the tunnel-defining portion which is exposed to an outside of the mount. The rotary valve rotatably received in the valve housing is selectively placed in a position for permitting flow of the fluid through the orifice passage, and in a position for inhibiting the flow of the fluid therethrough.