Piston pump
AssigneeRobert Bosch GmbH
InventorWolfgang Schuller
Life of this patent
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Abstract
The invention relates to a piston pump for a hydraulic slip-controlled vehicle brake system. The invention embodies the piston pump with a hollow piston, in whose circumferential wall one or more valve holes are made, which are covered by a bandlike valve closing body that is mounted on an inside of the circumferential wall of the piston. The invention has the advantage of a simple design of the inlet valve, and the inlet valve makes a small-sized, compact piston pump possible.
Claims8
A piston pump, comprising a piston (16) that is driven in a reciprocating stroke motion, a check valve (28) that controls a flow direction through the piston pump, the piston (16) is embodied as a hollow piston with a wall (18), whose interior forms a positive displacement chamber (22) of the piston pump (10), the check valve (28) includes a valve hole (30), which is made in the piston (16) and has a channel-like valve closing body (32) that is mounted on the piston (16) with an open face of a channel (38) that covers the valve hole (30) of the piston (16), said valve closing body comprises a spring-elastic material, and at a same time forms a valve spring element.
Dependencies are inferred from the claim text.