To simplify handling and be capable of rapidly and accurately exhausting a compressed medium chamber.
A pressure medium reservoir is for a hydraulic type brake device for especially a vehicle and has a compressed medium chamber, the compressed medium chamber is limited by an outside easing and a piston capable of sliding within the casing, at least one seal element is situated to seal a compressed medium chamber between the casing and the piston, and in this case, in a type that an inflow opening is provided to load a compressed medium chamber by a compressed medium, simultaneously when the seal element 14 is situated in a seal position and worked together with and connected to the compressed medium chamber during a time in which an inflow opening 15 assembles and before the piston 13 is situated in an operation position.
SCHAEFER ERNST-DIETER
ZIMMERMANN PETER
