Viscous fluid coupling

Details Viscous fluid coupling Viscous fluid coupling

1991-01-30

1991-12-10

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, 123 4112, F16D 3100

Patent

active

050709801

ABSTRACT:
There is disclosed a thin and inexpensive viscous fluid coupling used to control the rotational speed of a fan for cooling an automotive engine. The coupling comprises a shaft, a housing rotatably held to the shaft, a cover mounted to the housing, a first and a second annular partition plates having communication holes, respectively, a valve for opening and closing the holes, and a rotor mounted to one end of the shaft. The housing and the cover together form an inside space which is divided into a storage chamber and a working chamber by the partition plates. The inside diameter of the first partition plate is less than that of the second partition plate. The communication holes are located on the same circumference, or the hole in the first partition plate is located radially outside the hole in the second partition plate.

REFERENCES:
patent: 4064980 (1977-12-01), Tinholt
patent: 4295550 (1981-10-01), Hayashi
patent: 4298111 (1981-11-01), Hayashi
patent: 4909368 (1990-03-01), Hayashi
patent: 4930457 (1990-06-01), Tamai
patent: 4938329 (1990-07-01), Kennedy
patent: 4969920 (1990-11-01), Kennedy
patent: 4974712 (1990-12-01), Brown
patent: 4979601 (1990-12-01), Hagiwara et al.

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