Vacuum brake booster

Details Vacuum brake booster Vacuum brake booster

2005-11-01

2005-11-01

Look, Edward K. (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C091S37600A

Reexamination Certificate

active

06959637

ABSTRACT:
A control valve for a brake booster having a first member with a first bore, a second member located in the first bore and having a second bore, a plunger located in the second bore and connected to an input member. A gear fixed to the second member with teeth that engage a first rack retained in the first body and a stationary rack within the brake booster. A force applied to the input member controls the development of a pressure differential that moves a wall during a brake application. Movement of the wall causes a rotative torque to be transmitted from the first rack into teeth such that the gear moves with respect to the second rack and the second body to separates from the first body and as a result the travel of input member is less than the travel of the wall during a brake application.

REFERENCES:
patent: 1906222 (1933-05-01), Boland
patent: 3083698 (1963-04-01), Price
patent: 3517588 (1970-06-01), Kytta
patent: 3760693 (1973-09-01), Myers
patent: 5350224 (1994-09-01), Nell et al.
patent: 5518305 (1996-05-01), Jakobi et al.
patent: 6282896 (2001-09-01), Wachi et al.
patent: 6390567 (2002-05-01), Hurlbutt
patent: 6739234 (2004-05-01), Zinndorf et al.

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