Patent ID: 6953026

Claim:
A pressure regulating valve for a mechanical returnless fuel system for an automotive vehicle comprising a fuel pump having a pump outlet for supplying fuel from a fuel supply to an engine, said pressure regulating valve comprising: a conduit having an inlet in fluid communication with the pump outlet and connecting to said fuel supply; a valve seat disposed within the conduit; a valve body received in the conduit and comprising a frustoconical seal surface, said valve body being moveable along an axis between a closed position wherein the frustoconical seal surface engages the valve seat and an open position wherein the valve body is spaced apart from the valve seat to permit fuel flow through the conduit; and a spring for biasing the valve in the closed position; and wherein the frustoconical seal surface of the valve body extends at a first angle relative to the axis, and said valve seat is frustoconical and extends at a second angle relative to the axis that is distinct from the first angle.