Patent ID: 9102310
Filing Date: 2015-08-11
Classification: B60T

Abstract:
1. A hydraulic unit for a motor vehicle brake system comprising: a master cylinder connection on the hydraulic unit, pressure regulating valves in the form of inlet and outlet valves in a brake circuit which is at least partially present in the hydraulic unit and is connectable via wheel brake connections on the hydraulic unit to at least one pair of wheel brakes, a return line which is connected downstream of the outlet valves in the hydraulic unit and opens via a first hydraulic connection into a pressure medium chamber of a low-pressure accumulator delimited by a piston, and is connectable via a second hydraulic connection to the pressure medium chamber and to a suction side of a pump and also, via a reversing valve which is closed in a rest position, to the master cylinder connection, a non-return valve which blocks in a direction of the pressure medium chamber and is located in the return line adjacent the second connection, and an elastic sealing element provided between the piston and the second connection, which elastic sealing element disconnects a hydraulic connection functionally provided between the second connection and the pressure medium chamber in a rest position of the piston, the sealing element combined with the non-return valve, which blocks in the direction of the pressure medium chamber, to form valve assembly, the valve assembly comprising a substantially tubular valve housing, and a valve ball received in a conical valve seat provided on an end portion of the substantially tubular valve housing that is oriented towards the second connection, the valve ball received in the conical valve seat forms the non-return valve, and the elastic sealing element is fixed to an end portion of the tubular valve housing oriented away from the second connection.