Heart Booster Pump With Magnetic Drive
OwnerGlendal R. Dowinventor
Life of this patent
Estimating the term…
Abstract
A blood flow pump has a housing with an axis. The pump is mounted concentrically about the axis in the housing, defining a chamber. A pusher plate in the housing is concentric with the axis. The pusher plate is substantially non-rotatable relative to the housing and movable in forward directions along the axis. A pair of driven magnets are mounted to the pusher plate and offset from the axis. A pair of driving magnets are mounted to a support member that is driven by a drive shaft. The driving magnets are offset from the drive shaft so that when rotated, their magnetic fields pass through the magnetic fields of the driven magnets. The magnetic field are arranged to oppose each other, creating a repelling force to cause the pusher plate to push the pump element in a pressure stroke direction.
Claims19
A blood flow pump, comprising:
- a housing;
- a pump element mounted in the housing, defining a chamber;
- inlet and outlet ports in the chamber for receiving and discharging blood;
- at least one driven magnet in the housing and cooperatively associated with the pump element such that movement of the driven magnet in a forward direction results in movement of the pump element from an intake position toward a discharge position;
- and
- at least one driving magnet in the housing, the driving magnet being rotatable about an axis, the rotation moving the driving magnet between an aligned position and a misaligned position relative to the driven magnet, the driven and driving magnets being oriented such that their magnetic forces repel each other when in the aligned position, causing the driven magnet to move in the forward direction when the driving magnet moves to the aligned position.
A blood flow pump, comprising:
- a housing having an axis;
- a pump element mounted concentrically about the axis in the housing, defining a chamber;
- inlet and outlet ports in the housing in communication with the chamber for receiving and discharging blood from the chamber;
- a pusher plate in the housing concentric with the axis, the pusher plate being substantially nonrotatable relative to the housing and movable in discharge stroke and intake stroke directions along the axis, the pusher plate being cooperatively engaged with the pump element for pushing the pump element in the discharge stroke direction to push blood from the chamber through the outlet port;
- a pair of driven magnets mounted to the pusher plate for movement therewith, each of the driven magnets being offset from the axis and having a magnetic field that is of the same polarity and faces rearward;
- a rotatably driven drive shaft extending into the housing along the axis;
- a support member mounted concentrically to the drive shaft within the housing for rotation therewith;
- and
- a pair of driving magnets mounted to the support member for rotation therewith, each of the driving magnets being offset from the drive shaft and having a magnetic field facing forward that has a polarity the same as the rearward facing magnetic fields of the driven magnets, the support member being positioned such that rotation of the drive shaft causes the magnetic field of each driving magnet to rotate through the magnetic field of each driven magnet to exert repelling forces.
A method of pumping blood, comprising:
- providing a housing containing a pump element defining a chamber, inlet and outlet ports in the chamber, and at least one driven magnet and at least one driving magnet;
- rotating the driving magnet in a circle so that a magnetic field of the driving magnet passes into and out of a magnetic field of the driven magnet, causing a repelling force to occur each time the magnetic field of the driving magnet passes through the magnetic field of the driven magnet;
- and
- with the repelling force, changing a direction of movement of the pump element from an intake stroke direction, which allows blood flow into the chamber, to a discharge stroke direction, which pushes blood from the chamber.
Dependencies are inferred from the claim text.