OD wiper

Details OD wiper OD wiper

2011-06-21

2011-06-21

Bonck, Rodney H (Department: 3655)

192 clutches and power-stop control

Clutches

Fluent material

C192S058610

Reexamination Certificate

active

07963380

ABSTRACT:
A viscous fan drive having improved pumping efficiency from removing fluid from a fluid operating chamber to a fluid reservoir chamber is achieved by providing a wiper element that is located within the radial clearance between the clutch and the housing that effectively seals leakage paths leading (upstream) and trailing the wiper. The wiper element includes a radial tang that is positioned within a corresponding slot of the cover wall. The wiper element also has a pair of spaced apart arms extending from the radial tang portion each having a radial outer surface that has a similar radius as the cover wall and a radial inner surface has a similar radius as the clutch. The wiper element also preferably includes details designed to seal the radial inner surface to the outer periphery of the clutch during fan drive operation and a locating detail to aid in assembly.

REFERENCES:
patent: 3659061 (1972-04-01), Andreaggi
patent: 3955234 (1976-05-01), Roefaro
patent: 4383597 (1983-05-01), Blair
patent: 4564094 (1986-01-01), Storz
patent: 4924985 (1990-05-01), Kennedy
patent: 4938329 (1990-07-01), Kennedy
patent: 4977990 (1990-12-01), Mader
patent: 5920048 (1999-07-01), Crippen et al.
patent: 7650974 (2010-01-01), Light et al.

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