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:
Oct. 16, 1990
Filed:
May. 16, 1989
Hans Martin, Stuttgart, DE;
Abstract
A fluid friction clutch is disclosed for vehicle cooling fans and the like, which clutch is controlled by a bimetallic element controlling a clutch fluid valve opening. Since the bimetallic element must have degrees of freedom, the fastening of the bimetallic elements at the cover of fluid friction clutch results in difficulties, particularly if the clutch is subjected to high stress. In order to avoid that the bimetallic element can move away from its position in the case of high stress, it is suggested to provide a bimetallic element which is clamped in only at one side and the free end of which has the required freedom of motion, but which can be fastened securely in its position. The new clutch is used for cooling fans of motor vehicle engines which are to be switched as a function of the temperature.