Negative pressure brake booster

Details Negative pressure brake booster Negative pressure brake booster

2005-01-18

2005-01-18

Look, Edward K. (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C091S37600A

Reexamination Certificate

active

06843160

ABSTRACT:
A tubular member18is slidably fitted into a valve body, and is formed with a vacuum valve seat21. The tubular member18, a valve plunger16and the valve body3are maintained in their inoperative positions shown by abutment against a key member13. A holder14is formed with a tapered surface14ato assist in allowing an elastic deformation of a reaction disc15. Immediately after the commencement of operation of a valve mechanism7as an input shaft8is driven forward, the input shaft8and the tubular member18are maintained in their inoperative positions until a rear end face of a variable pressure passage28abuts against the key member13. The operating stroke of an input shaft6can be chosen to be less than the operating stroke of an output shaft11while preventing the jumping value from increasing to an excessively high value.

REFERENCES:
patent: 5479844 (1996-01-01), Heibel et al.
patent: 6408738 (2002-06-01), Harth et al.
patent: 6564692 (2003-05-01), Inoue et al.
patent: 5-193486 (1993-08-01), None

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