Piston pump
AssigneeRobert Bosch GmbH
InventorsNorbert Alaze, Siegfried Fritsch, Andreas Weh
Life of this patent
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Abstract
A piston pump for a slip-controlled hydraulic vehicle brake system. For the sake of economical production, the piston pump is embodied with a plastic bush and with a needle of a needle bearing as the piston, and that an inlet valve is accommodated in a valve seat part (96) that is inserted into the bush (16). The invention has an advantage that both the inlet valve and an outlet valve can be mounted coaxially on the bush, and that the bush, because of its elasticity since it is made of plastic, brings about a favorable closing performance of the two valves.
Claims11
A piston pump for a vehicle brake system, having a housing, into which a bush is inserted, and in the bush a piston that can be driven to execute a reciprocating stroke motion is received axially displaceably, a first check valve (64), which is mounted on the bush and controls a flow direction of fluid, pumped through the piston pump, by the piston pump, the first check valve (64) has a first valve seat (62,120),the piston pump (10) has a second check valve (38), which is disposed in the bush (16) and controls the flow direction of fluid, pumped through the piston pump (10) by the piston pump (10),the second check valve (38) has a second valve seat (42,102),the first valve seat (62,120) is associated with the bush (16) in a stationary manner, and the second valve seat (42,102) is associated with the bush (16) in a stationary manner.
Dependencies are inferred from the claim text.