Fluid return channels for a cover of a viscous fluid clutch

Details Fluid return channels for a cover of a viscous fluid clutch Fluid return channels for a cover of a viscous fluid clutch

1991-02-07

1992-05-19

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, F16D 3102, F16D 4325

Patent

active

051139871

ABSTRACT:
A viscous fluid clutch includes an internally-mounted pump plate for separating a working chamber from a reservoir. Fill openings in the pump plate permit fluid flow from the reservoir to the working chamber. Orifices in the pump plate direct return flow back to the reservoir. Fluid accumulators formed in a cover are aligned with each of the pump plate orifices. A non-radical channel formed in the cover begins at a respective accumulator and terminates at an inner reservoir chamber. Centripetal forces of the rotating clutch pump fluid from the accumulators to the reservoir. The geometry of the channels prevents migration of fluid from the reservoir to the working chamber without the use of mechanical valves when the clutch is at rest.

REFERENCES:
patent: Re30608 (1981-05-01), Bopp
patent: 3404832 (1968-10-01), Sutaruk
patent: 3559786 (1971-02-01), Long, Jr.
patent: 3648811 (1972-03-01), La Flame
patent: 4086990 (1978-05-01), Spence
patent: 4544053 (1985-10-01), Yamaguchi et al.
patent: 4779323 (1988-10-01), Bloemendal
patent: 4974712 (1990-12-01), Brown

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