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. 17, 1999
Filed:
Oct. 22, 1997
Applicant:
Inventors:
Hans Martin, Stuttgart, DE;
Franz A Bierbrauer, Schwalbach, DE;
Assignee:
Magenta GmbH Systemlieferant fuer Elektromagnetische Baugruppen, Heusweiler, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
192 5861 ; 192 588 ;
Abstract
A fluid friction clutch has a supply chamber separated from a working chamber by a connecting orifice between the supply chamber and the working chamber. The clutch has a pivotable valve lever with a permanent magnet. A circuit applies a selectively positive or negative current to an electromagnetic coil for generating a selectively alternative magnetic field that interacts with the permanent magnet to control the movement of the valve lever, and, thereby open and close the connecting orifice.