Power piston assembly of a brake booster

Details Power piston assembly of a brake booster Power piston assembly of a brake booster

1988-07-07

1990-06-26

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, F15B 910

Patent

active

049361910

ABSTRACT:
A power piston assembly of a brake booster includes a power piston including a stepped cylindrical portion having a through-hole. A diaphragm is provided on the rear surface of the power piston. The diaphragm has an inner-circumferential bead which is connected to the rear end of the cylindrical portion of the power piston. The valve body has a stepped cylindrical portion which engages with the stepped portion of the power piston and is disposed in the through-hole of the power piston with the diaphragm bead in sealing contact with the valve body. A retainer is pressed fitted into the cylindrical portion of the power piston so as to abut the front surface of the valve body to secure the valve body in close contact with the power piston.

REFERENCES:
patent: 4117769 (1978-10-01), Carre et al.
patent: 4286501 (1981-09-01), Thomas et al.
patent: 4354423 (1982-10-01), Ohmi et al.
patent: 4406213 (1983-09-01), Haar
patent: 4587884 (1986-05-01), Tsubouchi
patent: 4587885 (1986-05-01), Boehm et al.
patent: 4800799 (1989-01-01), Nishii

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