Patent ID: 6439265
Filing Date: 2002-08-27
Classification: B60T,Y10T

Abstract:
In a solenoid valve (1), particularly useful in slip-controlled hydraulic brake systems of motor vehicles, and having a seat valve (26) disposed between a pressure fluid inlet (17) and a pressure fluid outlet (18), and a bypass to the seat valve (26) having a check valve (30) disposed in the bypass, the check valve (30) having a closing body (40) which is in the form of a quad ring having at least two sealing lips (42, 43), and a valve component (31) that is injection molded of a plastic material, which valve component has a circular cylindrical recess (34) and a valve seat, the improvement wherein the valve seat includes a circular ring surface (41) that is adjoined by circularly disposed pressure fluid openings (44), which are overlapped on their radial inside and on their radial outside, and thus closed by respective sealing lips (42, 43) of the annular rubber-elastic closing body (40) when the closing body is in a closed position, pressure fluid is communicated between said inlet and said outlet through said seat valve (26) and the closing body is located in the circular cylindrical recess (34) to he guided thereby in an axial motion in relation to the circular ring surface (41) for moving said sealing lips (42, 43) from said pressure fluid openings (44), when pressure fluid is communicated from said outlet to said inlet, thus bypassing said seat valve (26).