Patent ID: 6065292
Filing Date: 2000-05-23
Classification: B60T

Abstract:
A master cylinder for a hydraulic vehicle braking system including a housing having a bore formed therein and extending along a longitudinal axis, whose one end is closed by an end wall associated with the housing of the master cylinder and whose other opposite end is sealingly closed by a closure element, with a piston being accommodated sealingly and axially movable in the bore adjacent to the closure element, which can be actuated through same, which has a central valve enabling a fluid connection between a fluid reservoir and a pressure chamber which is defined in the bore by the end wall and the piston and which, when the piston is not actuated, is held in the open position by means of an abutment member acting on the closure element, wherein the closure element is formed from separate first and second parts axially succeeding one another, wherein the first part faces towards the bore and is made from an elastomeric material, and wherein the second part faces away from the bore and is made from a rigid material, characterized in thatthe first and second parts of the closure element are detachably connected with each other and an annular circumferential projection, which is integrally formed with the second part whose maximum cross-sectional dimension amounts to not more than approximately half of the cross-sectional dimension of the first part, and penetrates the first part completely or nearly completely in an axial direction.