Patent ID: 7152583

Claim:
A fuel pump comprising: a cylinder formed in a pump body, a reciprocating plunger installed in the cylinder, a pressurizing chamber formed by the cylinder and the plunger, and whose internal volume varies with reciprocating motion of the plunger, a fuel intake passage for feeding fuel into the pressurizing chamber, a fuel discharge passage for feeding out the fuel pressured by the pressurizing chamber, a fuel intake valve provided in the fuel intake passage, and a fuel discharge valve provided in the fuel discharge passage, and a connecting passage for connecting between the upstream side of the intake valve in the fuel intake passage and the downstream side of the discharge valve in the fuel discharge passage, wherein the connecting passage is provided with a check valve for allowing the fuel to pass from the fuel discharge flow passage to the fuel intake passage, and the connecting passage is comprised of a check valve-mounting hole which is bored into the pump body from an outer surface of the pump body.