Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-03-12
1987-02-10
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
046415688
ABSTRACT:
A vacuum-operated brake power booster is provided having a movable wall which is sealed off relative to the vacuum housing and a control valve body which is slidable jointly with the movable wall. A hollow cylinder-shaped expanded plastic ring is arranged in the annular clearance between the neck portion of the pedal side housing shell and the collar of the diaphragm, which collar sealingly surrounds the control valve body. The expanded plastic ring effects the air flow during brake operation such that the air flow, enters the annular clearance through the duct extending in a radial direction within the control valve body and is suitably deflected and cushioned so that no noises arise at this point. In the same manner and simultaneously, vibrations, especially those of the neck portion of the housing shell of the vacuum housing, are suppressed, since the expanded plastic ring adheres to the inside wall of the housing shell.
REFERENCES:
patent: 2107812 (1938-02-01), Berry et al.
patent: 2678637 (1954-05-01), Doeden
patent: 3945401 (1976-06-01), Greenwood
patent: 4022112 (1977-05-01), Putt et al.
Bischoff Gilbert
Boehm Peter
Booten Sigmund
Engert Klaus
Loew Albin
Alfred Teves GmbH
Breh Donald J.
Garrett Robert E.
Raden James B.
Williamson Mark A.
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