Importance

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Abstract

A piston pump which is intended in particular for a vehicle hydraulic, slip-controlled brake system. To reduce idle volume in the piston pump, a positive-displacement body is mounted on the piston by means of a retaining part. The displacement body protrudes into an interior of a valve closing spring, embodied as a helical spring, of an inlet valve integrated with the piston. The embodiment of the valve closing spring and of a piston restoring spring with a rectangular coil cross section also contributes to reducing the idle volume of the piston pump. Reducing the idle volume increases the efficiency of the piston pump.

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First Claim