Fluid-filled friction clutch

Details Fluid-filled friction clutch Fluid-filled friction clutch

1979-01-30

1982-01-12

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, 251 11, F16D 3500, F16D 4325

Patent

active

043100848

ABSTRACT:
A fluid friction clutch especially for powering a rotary cooling fan for an internal combustion engine. The clutch has a driven part with a drive disc rotating in a drive chamber which is separated from a fluid reservoir chamber by a separating wall within the clutch housing. A passage in the separating wall can be opened and closed by a valve assembly which is actuated by a temperature-dependent element. The temperature-dependent element is an expansion element containing a substance which undergoes volume changes as a function of temperature. The expansion element is heated electrically by means of a PTC resistor under the control of a thermal switch which reacts to engine-related temperatures. When the power supply to the PTC heater is interrupted, the clutch engages and provides full cooling power.

REFERENCES:
patent: 1879633 (1932-09-01), Olsen et al.
patent: 3179221 (1965-04-01), Weir
patent: 3207279 (1965-09-01), Ahlen
patent: 3250355 (1966-05-01), Weir
patent: 3500634 (1970-03-01), Waseleski et al.
patent: 3684397 (1972-08-01), Elmer
patent: 3757914 (1973-09-01), Elmer
patent: 3860169 (1975-11-01), Norman
patent: 3880265 (1975-04-01), Elmer
patent: 4086987 (1978-05-01), Riley et al.
patent: 4111289 (1978-09-01), Brummett

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