Patent ID: 9180851
Filing Date: 2015-11-10
Classification: B60T,F15B

Abstract:
1. A master cylinder for a controlled motor vehicle brake system, comprising a first and a second piston which is displaceable in a housing and has a captive spring, a first end of the spring bearing at least indirectly against the first piston and a second end thereof against a sleeve which is displaceable with respect to the first piston and the movement of which with respect to the first piston is limited by a pin provided on the first piston and by a stop washer, the stop washer being arranged on a free end of the pin, wherein the stop washer of the first piston has means for the damped abutment of the sleeve, wherein the stop washer has on both sides a peripheral groove and the means are provided as elastic annular elements which are arranged in the respective peripheral grooves, and wherein the stop washer has a plurality of axially oriented bores which connect the grooves on both sides of the stop washer.