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. 01, 1988
Filed:
Jan. 02, 1987
Tatsuro Ishiyama, Yokohama, JP;
Michihiro Orikawa, Yokohama, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A vibration isolating apparatus wherein an inner tube and an outer tube are disposed coaxially or axially parallel with each other, and a pair of liquid chambers are formed in a vibration absorbing resilient member disposed between the inner and outer tubes. The liquid chambers are communicated with each other through a limiting passage. Each of the liquid chambers is divided by a partition having a flow passage, and one wall of each liquid chamber is defined by a flexible membrane which is capable of expanding and contracting the liquid chamber. Accordingly, low-frequency vibrations of relatively large amplitude are damped by virtue of the limiting passage. When high-frequency vibrations of relatively small amplitude occur, the flexible membranes are deformed in response to the rise and fall in internal pressure in the liquid chambers, causing liquid-column resonance to occur at each flow passage, and thus allowing the dynamic scale factor to be lowered.