Abstract: A housing having an interior and an exterior. A pump rotor is configured to be received within the interior of the housing, the pump rotor includes a magnet. A stator having a delivery configuration and an operative configuration is included, the stator in the delivery configuration has a delivery diameter, the stator in the operative configuration being configured to be disposed around the exterior of the housing and to form an assembled pump having a diameter greater than the delivery diameter.

Abstract: A housing having an interior and an exterior. A pump rotor is configured to be received within the interior of the housing, the pump rotor includes a magnet. A stator having a delivery configuration and an operative configuration is included, the stator in the delivery configuration has a delivery diameter, the stator in the operative configuration being configured to be disposed around the exterior of the housing and to form an assembled pump having a diameter greater than the delivery diameter.

Abstract: A housing having an interior and an exterior. A pump rotor is configured to be received within the interior of the housing, the pump rotor includes a magnet. A stator having a delivery configuration and an operative configuration is included, the stator in the delivery configuration has a delivery diameter, the stator in the operative configuration being configured to be disposed around the exterior of the housing and to form an assembled pump having a diameter greater than the delivery diameter.

Abstract: A housing having an interior and an exterior. A pump rotor is configured to be received within the interior of the housing, the pump rotor includes a magnet. A stator having a delivery configuration and an operative configuration is included, the stator in the delivery configuration has a delivery diameter, the stator in the operative configuration being configured to be disposed around the exterior of the housing and to form an assembled pump having a diameter greater than the delivery diameter.

Abstract: A pump for pumping sensitive fluids, such as blood, has no mechanical contact between the impeller and any other structure.

Abstract: A pump for pumping sensitive fluids, such as blood, having no mechanical contact between the impeller and any other structure. The pump comprises a pump housing, an impeller disposed within the pump housing, a magnetic bearing system for supporting and stabilizing the impeller in five degrees of freedom, and a conformally shaped magnetically linked motor for rotating the impeller. The magnetic bearing system and motor advantageously comprise electromagnets and permanent magnets for stability and control of the impeller, and to reduce size, weight, and pump power consumption. Permanent and electromagnets are disposed on the pump housing and permanent magnets are disposed on the impeller such that by controlling electric current through the electromagnets on the housing, the magnetically suspended impeller functions as the rotor, and the housing as the stator of a D.C. motor.

Abstract: A pump for pumping sensitive fluids, such as blood, has no mechanical contact between the impeller and any other structure.

Abstract: A magnetic bearing system allows a movable body to be positioned to a point of substantial equilibrium in an axial direction after a system shutdown. A sensor measures the axial position of the movable body to produce an displacement output. That output is then adjusted to account for a sensor offset. The adjustment is stored and can be used to position the movable body during regular operation of the system or when the system reboots or restarts. The adjusted displacement output is converted into a force for positioning the movable body. The movable body may be a rotor in a heart pump apparatus.

Abstract: An apparatus and method for a centrifugal fluid pump for pumping sensitive biological fluids, which includes (i) an integral impeller and rotor which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings and rotated by an integral motor, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf—all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

Abstract: A magnetic bearing system allows a movable body to be positioned to a point of substantial equilibrium in an axial direction after a system shutdown. A sensor measures the axial position of the movable body to produce an displacement output. That output is then adjusted to account for a sensor offset. The adjustment is stored and can be used to position the movable body during regular operation of the system or when the system reboots or restarts. The adjusted displacement output is converted into a force for positioning the movable body. The movable body may be a rotor in a heart pump apparatus.

Abstract: An apparatus and method for a centrifugal fluid pump for pumping sensitive biological fluids, which includes (i) an integral impeller and rotor which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings and rotated by an integral motor, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf—all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

Abstract: An inventive blood pump in accordance with this invention includes a housing that has inlet and outlet ports for receiving and discharging blood. A rotor is positioned in the housing's interior for pumping blood between the housing's inlet and outlet ports, with the rotor being capable of motion in three translational and three rotational axes. An assembly for magnetically suspending and rotating the rotor in a contact-free manner with respect to the housing includes only one electromagnetic bearing that actively controls motion of the rotor with respect to one axis selected from the rotor's three translational and three rotational axes, an electromagnetic motor that actively drives motion of the rotor with respect to one of its three rotational axes, and magnetic bearings for passively controlling motion of the rotor with respect to the remaining four of its translational and rotational axes. The inventive blood pump can also be incorporated into an artificial heart.