Clutch discs for a fluid friction clutch and process for making

Details Clutch discs for a fluid friction clutch and process for making Clutch discs for a fluid friction clutch and process for making

1987-03-11

1988-04-12

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Fluent material

192 7014, F16D 3500

Patent

active

047368284

ABSTRACT:
Lamellar clutch discs consisting of sheet steel and arranged in an enclosed housing filled with a viscous liquid medium for a fluid friction clutch are described. To achieve a torque transmission behavior of the clutch that will remain constant over long periods of time, the surfaces of the discs are to exhibit a roughness with an arithmetic mean rugosity R.sub.a in the range between 0.2 and 2 microns and a profile depth P.sub.t in the range between 2 and 15 microns. Furthermore, the distance between neighboring elevations of the rugosity profile is to lie in the range between 50 and 750 microns, and the surfaces are to have a wear-reducing nickel-phosphorus coating.

REFERENCES:
patent: 3896684 (1975-07-01), Duer
patent: 4031780 (1977-06-01), Dolan et al.
patent: 4040271 (1977-08-01), Rolt et al.
patent: 4048872 (1977-09-01), Webb
patent: 4058027 (1977-11-01), Webb
patent: 4096712 (1978-06-01), Webb
patent: 4432444 (1984-02-01), Hauser
patent: 4516443 (1985-05-01), Homano et al.
patent: 4667534 (1987-05-01), Kataoko
ISO Standard Sheet 4287/1, (Dec. 15, 1984), pp. 14-16.

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