F - Mech Eng,Light,Heat,Weapons – 01 – P
Patent
F - Mech Eng,Light,Heat,Weapons
01
P
123/153
F01P 7/02 (2006.01) B60K 11/00 (2006.01) F01P 7/08 (2006.01) F16D 27/112 (2006.01)
Patent
CA 1082060
Abstract of the Disclosure An electromagnetically operated engine cooling fan drive assembly is disclosed having a configuration parti- cularly 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 mem- ber rotatably mounted on the central shaft, with a temperature responsive electromagnetic clutch arrangement controlling dri- ve to the fan hub which arrangement includes an inner body ke- yed to the central shaft, an armature connected by spring con- nection to the fan hub, and a fixed electromagnetic coil ener- gized by a temperature switch at high engine temperature 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 ele- ments to shield the same against the entrance of dirt and o- ther 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 fai- lure of these elements; an adjustable anti-rotation arm is pro- vided 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 spe- cial 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.
302514
Carleton William A.
Mower Michael L.
Packard Gary R.
Facet Enterprises Inc.
Marks & Clerk
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