Fluid coupling and external control therefor

Details Fluid coupling and external control therefor Fluid coupling and external control therefor

1995-03-27

1996-09-24

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Fluent material

192 58683, 192 82T, 192 83, F16D 3502, F16D 4325

Patent

active

055581927

ABSTRACT:
A fluid coupling device is disclosed in which flow of fluid from a reservoir chamber (35) into a fluid operating chamber (33) is controlled by a valve member (41), rotatable with a valve shaft (39). Rotation of the valve shaft (39) is normally controlled, in response to variations in ambient air temperature, by means of a bimetal coil (45), In accordance with the invention, a normally fixed outer tab (75) of the bimetal coil is attached to an output plunger (85) of an electromagnetic actuator (83). As a result, the operating condition of the fan drive can be changed between a disengaged condition and an engaged condition, in response to variations in a predetermined condition (73), other than ambient air temperature. For example, the fan drive can be operated in the engaged condition, even at relatively low ambient air temperature, when the vehicle air conditioning system is operating, or the fan drive can be put in a disengaged condition, even at relatively high ambient air temperature, when the vehicle or engine speed is above a predetermined maximum.

REFERENCES:
patent: 1598677 (1926-09-01), Donning et al.
patent: 3055473 (1962-09-01), Oldberg et al.
patent: 4054193 (1977-10-01), Streeter
patent: 4351425 (1982-09-01), Bopp
patent: 4909367 (1990-03-01), Elmer
patent: 5152384 (1992-10-01), Brown

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