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:
Aug. 22, 1989
Filed:
Oct. 27, 1986
Masaru Saotome, Isehara, JP;
Takao Ushijima, Chigasaki, JP;
Takeshi Noguchi, Ichikawa, JP;
Naomi Sato, Tokyo, JP;
Tsutomu Nakao, Tokyo, JP;
Nissan Motor Co., Ltd., both of, JP;
Bridgestone Corporation, both of, JP;
Abstract
A bushing type vibration insulator, for example, used as a suspension bushing of an automotive vehicle. The vibration insulator consists of an outer cylindrical member connected to one member of the suspension. The outer cylindrical member is connected through an elastomeric member with an inner cylindrical member which is connected to another member of the suspension. The inner and outer cylindrical members share a common central longitudinal axis. Two fluid chambers are formed between the outer cylindrical member and the elastomeric member and filled with a fluid. The fluid chambers are communicable through a communication passage formed through an actuator fixedly secured directly to the outer cylindrical member. The actuator is constructed and arranged to block fluid flow through the communication passage under a predetermined condition, thereby raising the spring constant of the vibration insulator.