The CHECK VALVES according to the invention has an advantage over the prior art that the ball, at the ends of the Check Valves closing stroke, is free of spring force, and is moved into its closing position solely by forces resulting from pressure differences, without being exposed to intensive vibration that could cause bothersome noises. The check valve is therefore advantageously usable in hydraulic ,vehicle brake systems with anti-skid control systems and/or spin limiting systems, i.e. traction control systems, that are not supposed to cause any vibration of the passenger compartment when they are activated.

It has been found that the low-vibration behavior of the ball is attained even with the dimensions disclosed herein, which are simple to attain from a manufacturing standpoint.

The provisions defined herein are advantageous in the sense that they produce centering and longitudinal guidance of the ball in the support element, which promotes a central contact of the ball with the valve seat. This provision therefore contributes to increasing the functional life of the Check Valves .

A further feature of the check valve defined herein has an advantage that on the one hand a hydraulically favorable deviation of the pressure fluid across the free surface of the ball and the collar-like, support sleeve portion along with the valve seat and housing bore portion, and on the other hand an axial limitation of the support element stroke upon closure of the check valve are attained. The incomplete sealing prevents inducement of vibration on the part of the sleeve.

Finally, still another provision disclosed herein has an advantage that the noise-damping property of the plastic is utilized in the cooperation of the support element with the ball and the housing of the check valve.

The invention will be better understood and further objects and advantages thereof will become more apparent from the ensuing detailed description of a preferred embodiment taken in conjunction with the drawing.

MORE NEWS