Patent ID: 8734092

Claim:
A pump comprising: a pump housing having a pump housing inlet and a pump housing outlet; an impeller housing disposed in fluid communication with said pump housing between said pump housing inlet and said pump housing outlet; an impeller disposed in said impeller housing; a shaft housing disposed in fluid communication with said pump housing; an impeller shaft in said shaft housing and drivingly engaging said impeller; a power unit drivingly engaging said impeller shaft; a diversion conduit disposed in fluid communication with said pump housing between said pump housing inlet and said shaft housing; and a pump housing outlet valve in said pump housing between said diversion conduit and said pump housing outlet, said pump housing outlet valve positional between an open position wherein fluid flows from said pump housing inlet past said diversion conduit and said shaft housing, respectively, through said pump housing outlet and a closed position wherein a first portion of the fluid flows from said pump housing through said diversion conduit and a second portion of the fluid simultaneously flows from said pump housing through said shaft housing.