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. 10, 1978
Filed:
May. 04, 1977
Michael Lee Mower, Elmira, NY (US);
William Arthur Carleton, Pine City, NY (US);
Gary Richard Packard, Horseheads, NY (US);
Facet Enterprises, Inc., Tulsa, OK (US);
Abstract
An electromagnetically operated engine cooling fan drive assembly is disclosed having a configuration particularly suited for retrofit applications, including a central shaft adapted to be mounted to an existing fan drive flange to be driven thereby. The fan is mounted on a fan hub member rotatably mounted on the central shaft, with a temperature responsive electromagnetic clutch arrangement controlling drive to the fan hub which arrangement includes an inner body keyed to the central shaft, an armature connected by spring connection to the fan hub, and a fixed electromagnetic coil energized by a temperature switch at high engine temperatures and adapted to urge the armature into clutching engagement with the inner body and cause the fan to be rotated. A number of design features are described: an axially compact mounting of the fan hub to enable positioning of the fan within existing shrouding; the fan hub also encloses the magnetic clutch elements to shield the same against the entrance of dirt and other contaminants; special locking tabs which, in the event of electrical failure, can be positioned to mechanically lock together the inner body and fan hub; the inner body and armature do not support the fan in order to reduce the incidence of failure of these elements; an adjustable anti-rotation arm is provided restraining the magnetic coil body against rotation; the magnetic clutch may be assembled and disassembled on the engine allowing a more compact assembly and convenient repairs; a special fan hub bearing washer retainer is described that is locked to the central shaft insuring that bearing failure will not cause rotation of an end bolt which secures the fan hub on the central shaft.