Patent ID: 8905728

Claim:
A rotodynamic pump having an inner drive permanent magnet coupling disposed inside of an impeller comprising: a pump casing defining a pumping cavity; an inlet port connected to the pumping cavity; an outlet port connected to the pumping cavity; an impeller being rotatable about a rotational axis and disposed within the pumping cavity and having vanes; the impeller having a pumping region generally defined by an axial length of the vanes; a permanent magnet coupling that rotatably drives the impeller and that includes outer magnets that are connected to the impeller and inner magnets that are connected to an inner magnet ring and are aligned with the outer magnets; the pumping region being at least partially aligned with the permanent magnet coupling such that an imaginary plane that is perpendicular to the rotational axis of the impeller is able to pass through the pumping region and at least a portion of the permanent magnet coupling; a canister that is sealed to the casing and separates the outer magnets from the inner magnets; a nose cone connected to a front end portion of the canister, wherein the nose cone is sealed to the front end portion of the canister by a static seal; and wherein the inlet port directs fluid flow axially relative to the impeller and fluid is discharged radially from the impeller to the outlet port.