Pneumatic brake booster comprising a force sensor

Details Pneumatic brake booster comprising a force sensor Pneumatic brake booster comprising a force sensor

2007-12-05

2010-12-28

Lopez, F. Daniel (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C091S001000

Reexamination Certificate

active

07856918

ABSTRACT:
A pneumatic brake booster1comprising: a sealed structure3comprising a rigid casing11forming a funnel19furnished with an opening and a movable wall13dividing the sealed structure3into a low-pressure chamber25and a working chamber27, a pneumatic piston5comprising a boss31fixedly attached to the movable wall13and mounted so as to slide in the funnel opening, a valve element33housed in the boss31and a seal35positioned between the boss31and the funnel19, an input rod7and an output rod9coupled on either side of the pneumatic piston5, and a return spring37to return the pneumatic piston5to a rest position, the return spring37being placed in the low-pressure chamber25between an internal surface45of the rigid casing and the pneumatic piston5, and a force sensor39placed in the low-pressure chamber25and subjected to the pressure variations of the return spring37.

REFERENCES:
patent: 4718324 (1988-01-01), Gautier et al.
patent: 6805037 (2004-10-01), Hoffmann et al.
patent: 2736606 (1997-01-01), None
patent: 2834265 (2003-07-01), None

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