Pneumatic brake booster and method of manufacturing it
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United States of America Patent
Stats
-
Oct 7, 2003
Grant Date -
Jun 20, 2002
app pub date -
Feb 8, 2002
filing date -
Aug 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumatic brake booster (10) has a booster housing (12), the interior of which is subdivided by at least one movable wall (14) into a vacuum chamber (16) and a working chamber (18). Along an axis (A) a control valve (20) for controlling a pneumatic pressure difference acting upon the movable wall (14) projects into the booster housing (12). The movable wall (14) is workingly connected to the outside of a substantially cylindrical control valve housing (22), in that a collar (34) of a plate (30) associated with the movable wall (14) is deformed along its periphery at least in sections radially into the control valve housing (22). In order to simplify manufacture of the brake booster (10), in the portion (36) of the control valve housing (22) overlapped by the collar (34) of the plate (30) a plurality of recesses (40) are provided, which are spaced apart from one another in peripheral direction and into which the collar (34) of the plate (30) is radially deformed. The recesses (40) are accessible from the end of the control valve housing (22) disposed in the booster housing (12).
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