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:
Sep. 03, 2002
Filed:
Jun. 02, 2000
Claus Augenstein, Leonberg, DE;
Ralf Maus, Korntal-Muenchingen, DE;
Behr GmbH & Co., Stuttgart, DE;
Abstract
Fluid friction clutch is disclosed of the type having a primary disk ( ) fastened on a driving shaft ( ) comprising magnetic material and a driven clutch housing ( ) surrounding the primary disk and mounted with a hub ( ) on the shaft ( ), and with a working chamber ( ) formed between primary disk and clutch housing, into which a shear fluid can enter from a reservoir chamber ( ) according to the position of a valve plate ( ) opening or closing a connecting opening ( ) between reservoir chamber and working chamber and having an armature ( ) lying in reach of the shaft ( ), which can be shifted by magnetic force produced by a stationary electromagnetic coil ( ) arranged on the driven end of the shaft ( ), wherein the hub ( ) of the clutch housing ( ) facing the electromagnetic coil ( ) is provided with an inserted first conducting ring ( ) of magnetic material which is coupled magnetically at one end ( ) with the electromagnetic coil ( ) and at its other end facing the working chamber ( ) adjoins a second conducting ring ( ) of magnetic material which passes through the primary disk ( ) and ends in an area in front of the armature ( ) of the valve plate ( ).