Vacuum booster

Details Vacuum booster Vacuum booster

1996-03-08

1997-03-18

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

056112580

ABSTRACT:
A brake booster having separately formed valve bodies for the vacuum valve and the atmospheric valve, which minimizes an invalid portion of the operation stroke. There is provided a cylindrical inner member 800 air-tightly and slidably fitted in the internal bore of a hub portion 52 of a servo piston 50. The inner member 800 is biased backwardly by a spring 850. The inner member 800 has at its front end a valve body 510 of the vacuum valve 500. The rear end of the inner member 800 is caused to be abutted with the atmospheric air valve body 710 side of the atmospheric air valve 700 under the effect of force of the spring 850.

REFERENCES:
patent: 3548718 (1970-12-01), Utton
patent: 4005638 (1977-02-01), Takeuchi
patent: 5263399 (1993-11-01), Flory et al.

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