Fuel supply pump

Claim 1

A fuel pump comprising an electric motor section and a pump section driven by said electric motor section, a tubular casing means for housing the motor section and the pump section, said tubular casing means includes an opening at a first end thereof and a first pipe means for connection with a first external hose at a second end of the tubular casing means, end cover means for enclosing said opening, said end cover means being integrally provided with a second pipe means for connection with a second external hose and a terminal, said electric motor section comprising an insulating holder having an outer circumferential portion with depressed surfaces and being divided along a longitudinal axis thereof into two parts, an armature supported at both ends of said insulating holder through bearings, field magnets mounted on the parts of said insulating holder, yoke means fitted to said depressed surfaces so as to be held by said insulating holder for covering gaps between the two parts of said insulating holder, and brush means insertable in respective parts of the insulating holder, said pump section comprising a rotor mounted to one end of the shaft of said armature, and a pump-housing fixedly arranged to cover said rotor, both said electric motor section and pump section being covered with said tubular casing means and the opening of said casing means is covered with said end cover means so that both said electric motor section and said pump section are assembled together.