Patent ID: 7748949

Claim:
A pump unit for a fuel pump constructed and arranged to be disposed in a reservoir, the pump unit comprising: a pump housing, a pump cover, an impeller mounted for rotation between the pump housing and pump cover, the pump housing and pump cover having surfaces that cooperate to define a first channel and a second channel, each of the first and second channels having an inlet and an outlet, the impeller having first vanes cooperating with the first channel and second vanes cooperating with the second channel, the outlet of the second channel being constructed and arranged to provide fuel to an engine upon rotation of the impeller, a jet pump fluidly connected with the outlet of the first channel such that as the impeller rotates, fuel is delivered from the outlet of the first channel and through the jet pump causing fuel to be drawn into the reservoir, and connecting structure fluidly connecting the first and second channels such that upon rotation of the impeller, fuel in the second channel flows into the first channel to prime the first channel.