Viscous coupling apparatus with coined plates

Details Viscous coupling apparatus with coined plates Viscous coupling apparatus with coined plates

1992-05-29

1993-08-03

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Fluent material

192 7014, 192107R, F16D 3500

Patent

active

052320758

ABSTRACT:
A viscous coupling apparatus having enhanced torque progression characteristics. The viscous coupling apparatus includes two sets of viscous coupling plates which are interleaved and mounted with rotatable members for relative rotation therebetween. Each plate is a generally circular ring of thin plate material and has one or more openings formed therein. The openings include coined edge surfaces that form an inclined surface and a planar wiping surface. The coined edges facilitate the wiping and removal of viscous fluid from the surface of an adjacent coupling plate when relative rotation and frictional contact occurs between adjacent plates without generating excessive wear on one of the mating plates. The removal of the viscous fluid promotes enhanced frictional contact between the facing adjacent plate surfaces and results in an increased torque transmission characteristic.

REFERENCES:
patent: 2808140 (1957-10-01), Trofimov
patent: 4932509 (1990-06-01), Binder
patent: 4989687 (1991-02-01), Kwoka et al.
patent: 5007515 (1991-04-01), Shimizu
patent: 5041065 (1991-08-01), Kwoka

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