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:
Apr. 10, 1984
Filed:
Sep. 25, 1981
Michael Shepherd, Carmel, IN (US);
Wallace Murray Corporation, New York, NY (US);
Abstract
A shear fluid, temperature responsive fan drive coupling for the radiator cooling fan of an internal combustion engine. The drive coupling, conventionally, carries a temperature responsive valve which controls the degree of rotary coupling between the engine and the radiator cooling fan by controlling the quantity of shear fluid between a driving disc and a driven housing carrying the fan. The disc and the housing are parts of the coupling. The specific improvement of this invention relates to the provision of accumulator grooves in the walls of the drive chamber. These grooves allow an increase in the volume of shear (torque-transmitting) liquid in the coupling. The coupling exhibits modulated torque transmitting action in passing from partial to full engagement as temperature is varied.