Brake booster with sleeve and detent retained pressure plate

Details Brake booster with sleeve and detent retained pressure plate Brake booster with sleeve and detent retained pressure plate

1987-10-06

1989-02-14

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

92 98D, 92 99, F15B 910

Patent

active

048039128

ABSTRACT:
A servomotor device which includes a power piston and a diaphragm having an inner bead and which is disposed within a housing so as to divide the same into a constant pressure chamber and a variable pressure chamber, the power piston including a hub having a first shoulder faced toward the variable chamber and a second shoulder faced toward the constant pressure chamber, a pressure plate which includes the power piston engaged with the hub and having an inner sleeve portion engageable with the first shoulder so as to prevent movement of the pressure plate toward the constant pressure chamber with respect to hub, a detent portion unitarily formed on the pressure plate and engageable with the second shoulder so as to prevent movement of pressure plate toward the variable pressure chamber with respect to the hub, and a groove formed in the hub for hermetically retaining the inner bead of diaphragm therein.

REFERENCES:
patent: 1611176 (1926-12-01), Fekete
patent: 2160248 (1939-05-01), Colman
patent: 3136229 (1964-06-01), Bauman
patent: 3249021 (1966-05-01), Wuellner
patent: 3656413 (1972-04-01), Eggstein
patent: 3880049 (1975-04-01), Grabb et al.
patent: 3897718 (1975-08-01), Gardner et al.
patent: 4066005 (1978-01-01), Farr
patent: 4345506 (1982-08-01), Ohomi
patent: 4348944 (1982-09-01), Ochiai
patent: 4519295 (1985-05-01), Fulmer
patent: 4587889 (1986-05-01), Ohki et al.
patent: 4598624 (1986-07-01), Wagner

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