Fluid-filled friction clutch

Details Fluid-filled friction clutch Fluid-filled friction clutch

1979-01-30

1981-06-02

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

192 58B, 192 84PM, F16D 2701, F16D 2710, F16D 3500

Patent

active

042706416

ABSTRACT:
A fluid friction clutch, especially for driving the cooling fan of an internal combustion engine. The rotating clutch housing has a separating wall defining a fluid reservoir chamber and a drive chamber and the separating wall has a passage which is opened and closed by a valve. The valve is actuated by an electromagnet disposed substantially coaxially with the clutch. A permanent magnet is attached to the valve assembly coaxially with the electromagnet and of opposite polarity to the magnetic field polarity which occurs when the electromagnet is energized. Upon energization, the opposing magnetic fields repel the two magnets and cause the valve to close, thereby disengaging the clutch. When the electromagnetic is deenergized, a spring reopens the valve and permits full engagement of the clutch.

REFERENCES:
patent: 2838244 (1958-06-01), Oldberg
patent: 3179221 (1965-04-01), Weir
patent: 3207279 (1965-09-01), Ahlen
patent: 3250355 (1966-05-01), Weir
patent: 3738578 (1973-06-01), Farrell
patent: 3880265 (1975-04-01), Elmer
patent: 4056178 (1977-11-01), Detty

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