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:
May. 11, 2004
Filed:
Apr. 05, 2002
Applicant:
Inventors:
Christian Tilly, Uhldingen-Mühlhofen, DE;
Thomas Buchholz, Meersburg, DE;
Ulrich Niedermeier, Daisendorf, DE;
Assignee:
BorgWarner, Inc., Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 3/502 ;
U.S. Cl.
CPC ...
F16D 3/502 ;
Abstract
A fluid friction clutch, in particular for the fan of the radiator of an internal combustion engine, is described. A valve element ( ) controlling the clutch is operated via a solenoid control by means of a piston rod ( ) which is guided coaxially in the drive shaft ( ) of the clutch. The piston rod ( ) includes an anchor ( ), which is guided in the drive shaft ( ). An actuator coil ( ) is received in the magnet body ( ), which is seated rotatably upon the drive shaft ( ). The drive shaft ( ) guiding the anchor ( ) is provided with a non-magnetic separation gap ( ).