Piston pump
AssigneeRobert Bosch GmbH
InventorNorbert Alaze
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Abstract
The invention relates to a piston pump, in particular for an antilock and slip-controlled vehicle brake system. In order to embody a filter, the invention proposes providing a bushing of the piston pump with a bushing that encompasses it, wherein the bushing has beads on its ends, which are provided with grooves after the fashion of a knurling, through which incoming brake fluid flows between a wall of a pump bore and the bead into the piston pump and is therefore filtered.
Claims20
A piston pump for a vehicle brake system, having a pump housing provided with a pump bore, which bore encloses a piston for movement axially, which piston can be driven into a reciprocating stroke motion, said piston pump further having a filter for a fluid to be supplied, said filter (76) having a rough surface portion (84), which surface portion rests against a counter surface, and the fluid to be supplied is conveyed between the rough surface portion (84) and the counter surface.
Dependencies are inferred from the claim text.