Patent ID: 7415920

Claim:
A radial piston pump for generation of high fuel pressures in fuel injection systems, comprising: a pump housing, a pump shaft, at least one cylinder insert comprising: a cylinder chamber in which a piston can move back and forth, a front face lying on a flattening of the pump housing and connected to it using connecting means, wherein the front face of the cylinder insert and/or the flattening of the pump housing have precisely machined first and second raised sealing areas which are small in comparison to the total front face of the cylinder insert and to the total flattening of the pump housing, as a result of which a high surface pressure can be achieved in the sealing area, at least one inlet channel, through which the fuel can flow into the cylinder chamber, at least one high pressure channel, through which the fuel can flow out of the cylinder chamber, wherein the inlet channel and the high pressure channel end in the front face of the cylinder insert, and a first corresponding channel and a second corresponding channel arranged in the pump housing, ending in the flattening of the pump housing and are essentially aligned with the inlet channel and the high pressure channel respectively, wherein the first and second raised sealing areas are essentially configured annularly around the centre of the inlet channel and of the high pressure channel, respectively.