Patent ID: 6584771
Filing Date: 2003-07-01
Classification: B60T,F16D

Abstract:
A plunger-type piston for the variable delimitation of a pressure chamber in a housing of a hydraulic cylinder, in particular of a clutch master cylinder for motor vehicles, wherein the piston is movable between a normal position and an operating position;the piston including a main part on which a running surface is provided for a sealing element on a housing side, which, in the operating position of the piston, seals the pressure chamber; the piston further including an after-running device with which, in the normal position of the piston, said sealing element is in contact, wherein the after-running device is adapted to connect, in the normal position of the piston and underneath said sealing element, the pressure chamber to an after-running area; and wherein the after-running device is made separately from the main part and is connected to the main part without play to form the piston.