Pneumatic booster
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United States of America Patent
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-
Jun 20, 1995
Grant Date -
N/A
app pub date -
Jul 30, 1993
filing date -
May 26, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a pneumatic brake-booster comprising a casing (10) inside which is a piston formed of a back tubular part (22) supporting a skirt (14) and which, with the aid of an unrolling membrane (12), defines a front chamber (16) connected permanently to a source of partial vacuum and a back chamber (18) connected selectively to the front chamber (16) or to the atmosphere via a valve (40) actuated by a control rod (34) capable of bearing, through the intermediary of the front face of a plunger (32), on a first face of a reaction disk (58) securely attached through a second face to a thrust rod (56). According to the invention, the piston (20) bears against the reaction disk (58) through a resilient annular front face (68, 68').
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