Patent ID: 9737652
Date: 2017-08-22
CPC Classifications: A61M,F04D

Claim:
1. A blood pump, comprising: a pump housing; a rotor for pumping blood positioned in said housing, said rotor having an axis of rotation, a leading edge at a blood upstream end of said rotor and a trailing edge at a blood downstream end of said rotor, said rotor comprising peripheral land surfaces defined by one or more flow channels extending from said leading edge to said trailing edge, said channels being curved to drive blood in an axial direction as the rotor is rotated, a collective width of said flow channels in a circumferential direction of said rotor at each of some axial positions on a radial periphery of the rotor being substantially equal to or less than a collective total width of said peripheral land surfaces in the circumferential direction at said axial positions, said rotor further having one or more of a hydrodynamic bearing surface or a magnetic bearing to enable said rotor to rotate freely suspended within said housing a motor, said rotor including a plurality of magnetic poles; and a stator including an electrically activated coil configured to magnetically interact with said magnetic poles to cause said rotor to rotate.