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. 17, 1984
Filed:
May. 11, 1981
Michael C Shadday, Edinburg, IN (US);
Dennis A Wilber, Elizabethtown, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
This disclosure deals with a drive for a fan of an internal combustion engine, the drive including a clutch connected between the engine and the fan blades. A piston is movable to actuate the clutch, and an actuating fluid is employed to move the piston. The fan drive is connected to the engine lubricating system so that the engine lubricant acts as the actuating fluid. An engine temperature responsive circuit actuates the clutch to engage and disengage at certain engine temperatures. The fan drive includes a fluid feed path, return path and control path, but only two fluid connections to the clutch are necessary. When the temperature responsive circuit operates to disengage the clutch, a valve releases the pressure in order to quickly disengage the clutch.