Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1988-05-03
1989-11-28
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
F15B 910
Patent
active
048829765
ABSTRACT:
A brake booster in which a servo piston is slidably supported in a housing. The transmission of a brake force is effected via a piston rod protruding into the housing, and a work chamber is formed between the piston rod and the servo piston. After the opening of a valve, this work chamber can be filled with brake fluid from a reservoir or supply container via a pump or the like. A return line also leads out of the work chamber back to the supply container, via a further valve. To improve the closing or sealing behavior of the valves, the first valve is to be embodied for admitting the brake fluid from a valve cone, or its shoulder, the valve cone extending axially in a blind bore of the servo piston, and a valve seat formed out of a valve bushing. The second valve is likewise embodied as a seat valve, and an element connected with the valve cone cooperates with an element connected with the piston rod.
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), Shellhause
patent: 4309934 (1982-01-01), Volkmar et al.
Abbing Andreas
Bertling Hannes
Kehl George
Mergenthaler Robert
Rischen Dietmar
Greigg Edwin E.
Look Edward K.
Robert & Bosch GmbH
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