Anti-flowback check valve for a viscous fluid clutch

Details Anti-flowback check valve for a viscous fluid clutch Anti-flowback check valve for a viscous fluid clutch

1990-07-16

1991-06-11

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, F16D 3100

Patent

active

050225073

ABSTRACT:
A viscous fluid fan clutch assembly for a vehicle includes an internally-mounted pump plate for separating a working chamber from a reservoir. A plurality of discharge orifices are provided in the pump plate to permit the return of fluid from a pumping chamber to the reservoir. A fluid discharge channel is provided for each discharge orifice to receive fluid exiting the pumping chamber and to direct the fluid to an inner portion of the reservoir. A check valve is provided at the discharge channel to prevent the flowback of fluid from the reservoir to the discharge channel, particularly when the clutch assembly is not in operation.

REFERENCES:
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patent: 4938328 (1990-07-01), Kennedy
Lawrence C. Kennedy and Ronald G. Huth, USSN 07/459,406 filed Dec. 29, 1989, "Pressure-Responsive Fluid Check Valve and Method for a Viscous Fluid Clutch".

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