Patent ID: 7775193

Claim:
A high-pressure pump for a fuel injection system of an internal combustion engine, the pump comprising a housing with at least one pump element including a pump piston driven into a stroke motion by a drive shaft; the pump piston being guided so that it can slide in a cylinder bore of a housing part and delimiting a pumping chamber therein; a support element supporting the pump piston against the drive shaft; a prestressed return spring acting on both the pump piston and the support element in the direction toward the drive shaft; a receptacle contained in the same housing part that contains the cylinder bore; the housing part comprising an extension that is at least approximately cylindrical, is oriented toward the drive shaft, and contains the cylinder bore and the receptacle, an end of the cylinder bore oriented toward the drive shaft terminates at a plane containing a wall of the receptacle; the receptacle being embodied in the form of at least one slot in the extension of the housing part extending to an end surface of the extension oriented toward the drive shaft, the at least one slot being delimited by two walls extending at least approximately parallel to each other; the support element being embodied as at least approximately rectangular in cross section and situated in the receptacle between the two walls of the slot; and the support element being guided so that it can slide between the two walls of the at least one slot in the receptacle in the direction of the longitudinal axis of the pump piston, but cannot rotate around the longitudinal axis.