Tandem vacuum servo unit for a vehicle braking system

Details Tandem vacuum servo unit for a vehicle braking system Tandem vacuum servo unit for a vehicle braking system

1997-01-31

1999-08-24

Schwartz, Chris

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

913691, 91376R, 92 98D, 92 48, F15B 910, B60T 13563, B60T 13565

Patent

active

059416106

ABSTRACT:
A tandem vacuum servo unit includes a movable power piston having a supporting portion and a front movable wall member having a first engaging portion for engaging the movable power piston. The first engaging portion has an input side face that engages the output side face of the supporting portion along a first contacting portion. A rear movable wall member has a second engaging portion whose input side face engages the output side face of the first engaging portion along a second contacting portion. The first contacting portion is spaced radially outwardly of the second contacting portion. This construction of the vacuum servo unit increases the durability of the front movable wall member.

REFERENCES:
patent: 4729287 (1988-03-01), Boehm et al.
patent: 5062348 (1991-11-01), Gotoh et al.
patent: 5259292 (1993-11-01), Sunohara et al.
patent: 5507216 (1996-04-01), Suwa
patent: 5564325 (1996-10-01), Satoh
patent: 5664479 (1997-09-01), Miwa
patent: 5704455 (1998-01-01), Watanabe

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