Single stage, dual channel turbine fuel pump

Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump

Reexamination Certificate

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Details

C415S055200, C415S055300, C415S055400, C415S055500, C415S055600, C415S055700

Reexamination Certificate

active

06932562

ABSTRACT:
A single stage, dual channel turbine fuel pump for use in a vehicle fuel delivery system, generally including a lower casing, an upper casing, an impeller and a motor. Both the lower and upper casings have a pair of concentric, annular grooves formed on their surfaces, where the two lower annular grooves are in fluid communication with a fuel passage inlet and the two upper annular grooves are in fluid communication with a fuel passage outlet. Rotation of the impeller causes a portion of the incoming fuel to be diverted into an inner lower groove and another portion into an outer lower groove. Once in the lower grooves, the fuel communicates with other parts of the pumping chamber such that it fills the upper grooves as well. Generally independent, helical fuel flow patterns are formed which cause the fuel to become pressurized as it flows from the inlet to the outlet. These helical fuel flow patterns allow for axial communication between vane pockets and corresponding grooves, but do not allow for radial communication.

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