Patent ID: 6655909
Filing Date: 2003-12-02
Classification: F04D,F05B

Abstract:
A cover for a fuel pump having a ring impeller comprising:a first side having a fuel inlet orifice and a second side defining a sealing surface and having a flow channel formed therein, said fuel inlet orifice extending through said cover in fluid communication with said flow channel; said flow channel having a first section defining an inlet, a second section defining a ramp, a third section defining a ramp end and a fourth section defining a main channel, a total length of said inlet, said ramp and said ramp end being defined by an arc extending between about 40 degrees and about 90 degrees from said inlet orifice; said inlet having a length that is about 10% of the total length of said arc, said ramp having a length that is about 70% of the total length of said arc, and said ramp end having a length that is about 20% of the total length of said arc; said inlet having a smooth curved profile, said ramp extending from said inlet at an angle relative to said sealing surface and connecting said inlet to said ramp end and said ramp end extending from said ramp at an angle relative to said second side and connecting said ramp to said main channel.