Cooling fan with viscous-magnetic fan clutch

Details Cooling fan with viscous-magnetic fan clutch Cooling fan with viscous-magnetic fan clutch

1979-02-14

1980-10-14

Smith, Leonard E.

Fluid reaction surfaces (i.e., impellers)

Having clutch or brake means

123 4112, 192 483, 192 58B, 192 82T, 416 32, F01D 708, F16D 2900

Patent

active

042278619

ABSTRACT:
Engine cooling fan with viscous-magnetic clutch which is electrically energized on closure of thermal switch mounted within engine coolant. As fan coil housing is driven on engagement of the magnetic clutch, silicone fluid is centrifugally displaced into working area of viscous clutch for fluid drive of fan body. Because of slippage in the fluid drive, fan speeds will gradually increase from minimum to maximum speeds. With progressive increase in speed, conventional fan blading can be employed without excessive fan generated noise.

REFERENCES:
patent: 3120219 (1964-02-01), Nallinger
patent: 3250355 (1966-05-01), Weir

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