Hydraulic brake clutch

Details Hydraulic brake clutch Hydraulic brake clutch

1995-02-02

1996-11-12

Pitts, Andrea L.

192 clutches and power-stop control

Clutch and brake

Sliding operation

192 35, F16D 6704

Patent

active

055730922

ABSTRACT:
A piston driving a brake and a clutch is split into a main piston and a secondary piston that can travel axially and that are related through limiting bolts. The main piston has a larger surface for the pressurized fluid than the secondary piston. The main piston has a duct through which the fluid flows to the secondary piston which is in turn fitted with springs that bias it, against the fluid tension, against the main piston. Therefore, when connection is made, the secondary piston first approaches the clutch discs without actually contacting the latter. After the brake is released, there is a first connection stage at which the secondary piston approaches the main piston and a second stage, after both pistons come into contact, at which the assembly works conventionally, as a single piston.

REFERENCES:
patent: 3157257 (1964-11-01), Root
patent: 3593353 (1971-07-01), Beneke
patent: 3713517 (1973-01-01), Sommer
patent: 4256211 (1981-03-01), Katkov
patent: 4275607 (1981-06-01), Snoy
patent: 4432443 (1984-02-01), Sommer
patent: 4562907 (1986-01-01), Maeda
patent: 4607736 (1986-08-01), Kelley
patent: 4739865 (1988-04-01), Yater et al.
patent: 4926989 (1990-05-01), Bruntz

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