Brake booster

Details Brake booster Brake booster

1981-05-19

1983-11-22

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91369A, 91374, F15B 910

Patent

active

044161883

ABSTRACT:
A brake booster of the stroke-enlarging type which includes a power piston disposed in a casing for being actuated by a difference in pressure on opposite sides thereof. The brake booster includes a transmission device in the form of a ball and ball retainer which are biased by a spring while the ball is retained between a surface of the power piston and a control piston. The ball and ball retainer are limited in movement by a stopper coupled to the power piston. The ball and ball retainer forming the transmission device are advanced in response to the spring bias by the power piston and are operated such that when a brake clearance has been extinguished and a reactionary force from the output member becomes larger than the preload of the spring, the reactionary force blocks the advance of the ball and ball retainer so that the reaction force is partly transmitted to the control piston with a resultant reduction of the reactionary force transmitted to the power piston.

REFERENCES:
patent: 4283911 (1981-08-01), Nakamura
patent: 4287811 (1981-09-01), Katagiri et al.
patent: 4366744 (1983-01-01), Katagiri et al.

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