Patent ID: 7160079

Claim:
A turbine fuel pump comprising: a cylindrical casing; an electric motor accommodated in the casing; a pump housing mounted into the casing, the pump housing including a suction port, a discharge port and a fuel path connected to the suction and discharge ports; and an impeller disposed within the pump housing and driven around an axis in a rotational direction by the electric motor, the impeller including a generally annular body and a plurality of vanes projecting radially outwardly from the body and disposed within the fuel path, each of the vanes being formed into a generally rectangular plate, the vanes each including a tip end face that extends circumferentially to define an outer peripheral surface of the impeller, a front face curved toward a forward side in the rotational direction of the impeller, the front face having a root portion located on a side of the body of the impeller and a tip end portion that is located on a side of an outer periphery of the impeller and positioned forwardly in the rotational direction of the impeller relative to the root portion, a rear face located on a rearward side in the rotational direction of the impeller, and a chamfer portion disposed between the tip end face and the tip end portion of the front face, wherein the chamfer portion is positioned forwardly in the rotational direction of the impeller relative to the root portion of the front face and has a uniform length between the tip end face and the tip end portion of the front face as measured in section perpendicular to the axis, and the uniform length of the chamfer portion is in a range of 0.05 mm to 0.15 mm.