Brake booster with tandem pistons having annular and radial rein

Details Brake booster with tandem pistons having annular and radial rein Brake booster with tandem pistons having annular and radial rein

1990-11-19

1991-12-31

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

92 99, 92128, F15B 910

Patent

active

050761420

ABSTRACT:
A servomotor having a partition for separating a first chamber from a second chamber. The partition has a hub with passages therein connecting the first and second chambers with each other and to the atmosphere. The partition has a plurality of concentric annular ribs and radial ribs to strengthen a radial disc that extends from the hub. A valve carried in said hub controls the communication of turbulent free air to the second chamber to create a pressure differential for moving the partition and developing an output force in response to an operator input. This same pressure differential acts on a diaphragm connected to the radial disc to seal a plurality of openings in the radial disc to assure that the pressure differential is not reduced by leakage through the openings.

REFERENCES:
patent: 3385167 (1968-05-01), Wilson et al.
patent: 3388635 (1968-06-01), Hager
patent: 3760693 (1973-10-01), Myers
patent: 3813992 (1974-06-01), Brown
patent: 4366744 (1983-01-01), Katagiri et al.
patent: 4393749 (1983-07-01), Miyazaki
patent: 4394833 (1983-07-01), Weiler et al.
patent: 4512237 (1985-04-01), Endoh et al.
patent: 4881452 (1989-11-01), Newhouse

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