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A rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades associated with the flow straightener, induc

A rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades associated with the flow straightener, inducer portion, impeller portion and diffuser are optimized to minimize hemolysis while maintaining pump efficiency. The rotor bearing includes a bearing chamber that is filled with cross-linked blood or other bio-compatible material. A back emf integrated circuit regulates rotor operation and a microcomputer may be used to control one or more back emf integrated circuits. A plurality of magnets are disposed in each of a plurality of impeller blades with a small air gap. A stator may be axially adjusted on the pump housing to absorb bearing load and maximize pump efficiency.

대표청구항 ▼

A fluid pump, comprising: a pump housing defining therein a fluid path for fluid flow through said pump; a rotor mounted within said pump housing for rotation therein about a rotor axis; impeller means for moving a fluid through said fluid path, said impeller means comprising at least one impeller b

A fluid pump, comprising: a pump housing defining therein a fluid path for fluid flow through said pump; a rotor mounted within said pump housing for rotation therein about a rotor axis; impeller means for moving a fluid through said fluid path, said impeller means comprising at least one impeller blade on said rotor; a plurality of magnets secured to said rotor; a stator in surrounding relationship to said pump housing, said stator and said plurality of magnets being positioned to define a magnetic flux gap therebetween having a radial spacing of less than 0.025 inches.