Pneumatic brake booster with reduced noise levels

Details Pneumatic brake booster with reduced noise levels Pneumatic brake booster with reduced noise levels

2005-02-01

2005-02-01

Look, Edward K. (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

Reexamination Certificate

active

06848352

ABSTRACT:
A pneumatic brake booster comprising an envelope formed of two shells (3, 5) defining an interior volume divided into two chambers by a skirt mounted so that it can slide with sealing. The skirt (7) is actuated by a pressure difference brought about by the operation of a three-way valve (17) arranged in a pneumatic piston arranged more or less in the central part of the skirt. The booster also comprising means (53) for reducing the noise, characterized in that the means (53) are bearing means comprising a layer of elastomer arranged between one of the shells (3, 5) and a rigid element.

REFERENCES:
patent: 3160549 (1964-12-01), Caldwell et al.
patent: 5024304 (1991-06-01), Booten et al.
patent: 5331813 (1994-07-01), Heibel et al.
patent: 5784946 (1998-07-01), Malosh et al.

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