Improvements in pneumatically-operated boosters for vehicle braking systems.

摘要

In a booster, an abutment member (106) forms a backstop for a valve key (63). The member (106) is carried within the rear hollow projection on the housing (1) of the booster, and is so positioned as to determine the retracted position of the components of the valve mechanism and, in consequence, the effective axial length of the booster. <IMAGE>