Patent ID: 7134377

Claim:
Vacuum brake booster, having a vacuum chamber and a working chamber separated from one another by a movable wall, a control valve which comprises a control valve housing coupled workingly to the movable wall and which, for achieving a pressure difference at the movable wall, is capable of controlling the supply of atmospheric pressure or above-atmospheric pressure to the working chamber in dependence upon the displacement of an input element of the vacuum brake booster, wherein the control valve housing comprises an outer sleeve and an inner sleeve, which is disposed radially at the inside of and coaxially with the outer sleeve and is connected by a plurality of webs to the outer sleeve, wherein the control valve housing is manufactured by injection molding, and wherein at least one injection point is provided, which is disposed in the region of the outer sleeve and at a distance from fastening points of the webs to the outer sleeve, and wherein the outer sleeve comprises two opposite ends and the injection point is substantially spaced from the ends.