Electromagnetic clutch with permanent magnet return mechanism

Details Electromagnetic clutch with permanent magnet return mechanism Electromagnetic clutch with permanent magnet return mechanism

1996-01-16

1997-03-11

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Operators

192209, 192 8496, 192 843, F16D 2701, F16D 27112

Patent

active

056092326

ABSTRACT:
An improved electromagnetic clutch is provided with a permanent magnetic return mechanism. The clutch includes a rotor connected to a driven device, such as a refrigerant compressor, a flywheel connected to a driving device such as an internal combustion engine, and a contact plate assembly for transmitting torque between the flywheel and the rotor when moved from a disengagement to an engagement position by an electromagnet. Permanent magnet assemblies are used to bias the contact plate assembly into a non-engagement position when the electromagnet is deactuated. The use of permanent magnets in lieu of resilient mechanical components such as springs to bias the contact plate assembly into a return position substantially extends the service life of the clutch when it is used in conjunction with a prime mover such as a diesel engine, whose output is accompanied by momentary spikes of high torque.

REFERENCES:
patent: 2105188 (1938-01-01), Guy
patent: 2962144 (1960-11-01), Heinemann et al.
patent: 3446321 (1969-05-01), Nyman
patent: 3642104 (1972-02-01), Schafer
patent: 3842378 (1974-10-01), Pierce
patent: 4566574 (1986-01-01), Marshall
patent: 4643091 (1987-02-01), Fairey
patent: 5115898 (1992-05-01), Lehle et al.
patent: 5119918 (1992-06-01), Pardee
patent: 5252874 (1993-10-01), Viegas

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