Patent ID: 6017099
Filing Date: 2000-01-25
Classification: B60T

Abstract:
A vibration damper (10) in a slip-controlled motor vehicle hydraulic brake system for damping fluid vibrations, comprising the following characteristics:the vibration damper (10) is disposed in a line (13, 14) between a master cylinder having a storage container for brake fluid and a suction side of a reciprocating piston pump with which brake pressure is in at least one wheel brake cylinder upon operation of the pump;the vibration damper (10) has a diaphragm (17), comprising an elastomer, which is tightly fastened in place at its edge and is disposed in a bore ( 11) of a housing (12) and which is exposed on one side to the brake fluid and with its other side defines a hollow chamber (45) which at least approximately has atmospheric pressure;the hollow chamber (45) is defined in turn by a support body (23), against which the diaphragm (17) is acted upon by the brake fluid, the support body (23) has a foot (24), which is secured in the bore (11) and beginning at a tapering extension (25) extends into the bore (11), the extension being sheathed by a sleevelike shaped part (17) forming the diaphragm;the extension (25) is provided, on at least one side face (36), with at least one groove (37);the at least one groove (37) is located on the face of the extension (25) toward the shaped part (17);the hollow chamber (45) is located between the extension (25) and the shaped part (17); andthe hollow chamber (45) communicates with the chamber (39), which has a communication with the ambient air.