Patent ID: 7217086

Claim:
A cooling fluid pump comprising: a casing having a cylindrical pump chamber inside and an outer surface, the pump chamber having an inner surface; an impeller provided rotatably inside the pump chamber and having a number of pump vanes, the impeller further having an axial end; a fluid path defined around the impeller in the pump chamber so that a fluid flows therethrough upon rotation of the impeller; a discharge port provided in the casing for discharging the fluid inside the fluid path and a suction port provided in the casing for suctioning the fluid into the fluid path upon rotation of the impeller; a protrusion provided on a portion of the inner surface of the pump chamber opposed to the axial end of the impeller, thereby separating the fluid discharged from the discharge port and the fluid suctioned from the suction port as well as pressuring the fluid flowing in the fluid path; and a heat receiving portion provided on a part of the outer surface of the casing overlapping the protrusion.