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:
Apr. 24, 1984
Filed:
Jul. 10, 1981
Applicant:
Inventor:
James E Stangroom, Castleton, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D / ; F16D / ; F16D / ;
U.S. Cl.
CPC ...
192 215 ; 192 21 ; 192 / ; 192 482 ;
Abstract
An electro-rheological fluid is used as a transmission fluid between confronting, rotatable sets of clutch plates across which a potential difference can be applied so as to vary the viscous shear characteristic of the interjacent fluid. Differential arrangements of the clutch plates ensure cancellation of residual drag effects and the clutch can be electrically varied substantially from complete disengagement to solid engagement.