Vacuum-operated power brake booster having two-part coaxial cont

Details Vacuum-operated power brake booster having two-part coaxial cont Vacuum-operated power brake booster having two-part coaxial cont

1984-05-23

1987-01-06

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 251367, F15B 910, F16K 3100

Patent

active

046337601

ABSTRACT:
In a vacuum-operated power brake booster, a control housing with a poppet valve for the control of the differential pressure comprises two control housing parts slidable telescopically in relation to one another. The first control housing part is secured to the rolling diaphragm through a diaphragm plate. In the release position the diaphragm plate is in abutment on the frontal sealing surface of the poppet valve that is held by the first control housing part. On its side remote from the sealing surface, the poppet valve is furnished with a stop which bears against the second control housing part through a sleeve. The second control housing is held by the booster housing via a ring seal. To keep the effect of the atmospheric pressure on the outwardly disposed surfaces of the poppet valve as small as possible, the poppet valve is provided on its section remote from the sealing surface with a circumferential annular sealing lip which projects radially outwardly beyond the said section and which is in sealing abutment on the cylindrical inner surface of the second control housing part.

REFERENCES:
patent: 3312147 (1967-04-01), Reichard
patent: 3410178 (1968-11-01), Kytta
patent: 4192220 (1980-03-01), Tateoka
patent: 4227371 (1980-10-01), Takeuchi
patent: 4400942 (1983-08-01), Reinartz et al.
patent: 4409885 (1983-10-01), Reinartz et al.
patent: 4425760 (1984-01-01), Furuta

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