Booster with reduced dead travel and a braking system...

Details Booster with reduced dead travel and a braking system... Booster with reduced dead travel and a braking system...

2007-09-11

2007-09-11

Kershteyn, Igor (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C060S554000, C060S582000

Reexamination Certificate

active

10557668

ABSTRACT:
A pneumatic brake booster with short actuating travel, comprising a skirt and a pneumatic piston that are rigidly connected and slideably mounted in a sealed casing to delimit a low-pressure chamber and a variable-pressure chamber and a three-way valve arrangement that is controlled by a control rod connected at a first end to a brake pedal. The three-way valve arrangement having first and second valve seats and a valve that is applied to at least one of the first and second valve seats by a valve spring. The second valve seat being borne by a first longitudinal end of a plunger distributor while the first valve seat is borne by a first longitudinal end of a bushing slideably mounted in a sealed manner in the pneumatic piston over a defined first travel and beyond the defined travel the bushing is secured axially to the pneumatic piston.

REFERENCES:
patent: 3973593 (1976-08-01), Muller
patent: 5167180 (1992-12-01), Verbo et al.
patent: 5479844 (1996-01-01), Heibel et al.
patent: 5579675 (1996-12-01), Gautier
patent: 6334383 (2002-01-01), Tsubouchi et al.
patent: 6408738 (2002-06-01), Harth et al.
patent: 6467390 (2002-10-01), Harth et al.
patent: 6755116 (2004-06-01), Tsubouchi et al.

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