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:
Jan. 03, 1995
Filed:
Sep. 07, 1993
David M Hudson, Kettering, OH (US);
David B Drennen, Bellbrook, OH (US);
Lawrence C Kennedy, Kettering, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A fan clutch includes a housing and a cover cooperating to contain a viscous fluid. A pump plate divides an interior of the fan clutch into a working chamber and a reservoir. A driven clutch plate, disposed in the working chamber, includes hub and disk portions. A wiper is mounted on the pump plate adjacent a discharge orifice so that a first clearance is provided between the wiper and a front surface of the disk portion. An annular blocking wall is formed on the front surface of the disk portion radially inbound of the wiper. The height of the blocking wall is such that a second clearance formed between the blocking wall and the pump plate is less than or substantially equal to the first clearance, thereby forming a dynamic seal.