Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1978-06-12
1980-12-23
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, 74107, 74110, F15B 910
Patent
active
042403308
ABSTRACT:
Servo boosters for vehicle hydraulic braking systems are described which incorporate a novel arrangement for providing an increasing reaction force on the input member in response to an increasing output force. In the novel arrangement a first thrust assembly is interposed between the input member and the output member, and a second thrust assembly is interposed between the movable wall of the booster, which may be a diaphragm or a piston, and the output member. The thrust assemblies each generally consist of rotatable parallel plates having inclined ramp surfaces on opposed faces co-operating with balls or rollers located between the plates. Some of the plates of the two thrust assemblies are keyed together. Axial forces between the members generate torques in the thrust assemblies and since the torques must balance each other as a result of the connections between the plates a fixed relationship is maintained between the input and output forces and the force exerted by the movable wall. In the constructions disclosed a single plate is common to both thrust assemblies.
REFERENCES:
patent: 2395223 (1946-02-01), Ingres
patent: 2806654 (1957-09-01), Daly
patent: 3109282 (1963-11-01), Price
patent: 3118309 (1964-01-01), Thompson
patent: 3997033 (1976-12-01), Bulmer
Girling Limited
Maslousky Paul E.
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