Brake booster

Details Brake booster Brake booster

1988-05-03

1989-07-25

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

048502626

ABSTRACT:
A brake booster in a housing, having a servo piston slidably supported in the housing and having a piston rod protruding into the housing for transmitting a brake force. A chamber is provided in the servo piston for receiving brake fluid drawn after the opening of a valve from a reservoir or supply container and pumped via a pump or the like. The chamber also communicates via a further valve or the like with a return line to the supply container. To improve the closing behavior of the valve, the first valve for the admission of the brake fluid is formed in the chamber, embodied as a servo chamber, by a valve bushing, or its annular collar, and a valve seat in a blind bore recess in the servo piston. On the other side, the valve bushing, with a bottom, engages the inside of a bell-shaped valve seat, which together with the piston rod, or a slide connected to the piston rod, forms the valve for returning the brake fluid.

REFERENCES:
patent: 2404512 (1946-07-01), May et al.
patent: 2544042 (1951-03-01), Pontius, III
patent: 2698205 (1954-12-01), Gagen
patent: 2761427 (1956-09-01), Shumaker
patent: 3596564 (1971-08-01), Johnson
patent: 3691903 (1972-09-01), Shellhouse
patent: 4309934 (1982-01-01), Volkmar et al.

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