Patent ID: 8561597

Claim:
A method of manufacturing a flange for a fuel pump module, the flange being mounted to a fuel tank and comprising: an outlet port connected to an internal combustion engine by a connection hose and feeding fuel to the engine, a first valve seat provided with a first valve, a second valve seat provided with a second valve, and a passage communicating the first valve seat and the second valve seat with each other, the method comprising: inserting a passage forming piece into a mold during an injection-molding process of manufacturing the flange, thus integrally forming the passage in the flange wherein the passage forming piece is fixed between a first core for forming the first valve seat and a second core for forming the second valve seat, and the interval between the first and second cores is designed to be smaller than the entire length of the passage forming piece, so that the passage forming piece is forcibly seated between the first and second cores.