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. 07, 1993
Filed:
Feb. 05, 1992
Applicant:
Inventors:
Assignee:
Bridgestone Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16F / ;
U.S. Cl.
CPC ...
188267 ; 267136 ; 248550 ; 248636 ;
Abstract
A positive electrode and a negative electrode are disposed in face-to-face relation to allow a distance between the electrodes to change, and an electrorheological fluid is filled between the electrodes. When an external force is applied to the electrorheological fluid via the electrodes, a normal stress occurs in the electrorheological fluid. This normal stress is greater than a shearing stress occurring in the electrorheological fluid, and an area in which displacement is proportional to the stress is large. Hence, the electrorheological fluid is applicable to various apparatuses such as a vibration controller and a fixing apparatus.