Electro-viscous fan clutch assembly

Details Electro-viscous fan clutch assembly Electro-viscous fan clutch assembly

1979-11-16

1981-11-24

Smith, Leonard E.

Fluid reaction surfaces (i.e., impellers)

Having clutch or brake means

123 4112, 192 58B, 192 82T, 416 32, F01D 708, F16D 2900

Patent

active

043021565

ABSTRACT:
Electro-viscous fan clutch having an electromagnet carried by a rotatable pump plate within the confines of the clutch housing. The electromagnet controls a spring arm valve element which is deflected to a spring loaded position by the generated magnetic field so that viscous clutch operation is terminated. On deenergization of the electromagnet, the valve element springs back to a position in which the fluid gate is opened to allow viscous operation of the clutch for engine cooling.

REFERENCES:
patent: 1934783 (1933-11-01), Arterburn
patent: 3227254 (1966-01-01), Sutaruk
patent: 3268041 (1966-08-01), Roper
patent: 3858697 (1975-01-01), Brewer et al.
patent: 4056178 (1977-11-01), Detty

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