Open electric pump

Abstract

An implantable pump is configured to be implanted in series with blood flow from a heart. The pump includes a frame configured to be implanted within the natural blood flow of the heart such as a ventricular outflow tract an outlet valve of the heart, and a central axle configured to be affixed within the frame parallel to the blood flow. The pump also includes a rotor attached to the central axle and configured to rotate in order to pump blood, and at least two electromagnetic coils configured to be energized in order to cause the rotor to rotate.

1 . (canceled) 
     
     
         2 . An implantable pump configured to be implanted in series with blood flow from a heart, the pump comprising:
 a frame configured to be implanted in a natural blood path of blood in the heart;   a central axle disposed within the frame and held in a position parallel to blood flow by the frame;   a rotor attached to the central axle and configured to rotate with the central axle to pump blood;   permanent magnets disposed at ends of the rotor;   a plurality of electromagnetic coils disposed within the frame and overlapping the ends of the rotor when the implantable pump is viewed from a direction parallel to the blood flow, the electromagnetic coils being configured to, in conjunction with the permanent magnets, cause the rotor to rotate.   
     
     
         3 . The implantable pump according to  claim 2 , wherein the frame includes a cylindrical portion, and the plurality of electromagnetic coils are attached to the cylindrical portion. 
     
     
         4 . The implantable pump according to  claim 3 , wherein the frame further includes:
 at least one support beam configured to hold the axle in place, and   a plurality of support members configured to attach the support beam to the cylindrical portion.   
     
     
         5 . The implantable pump according to  claim 4 , wherein the at least one support beam includes a bushing into which an end of the axle is inserted. 
     
     
         6 . The implantable pump according to  claim 2 , wherein the plurality of electromagnetic coils are evenly distributed around the cylindrical portion. 
     
     
         7 . The implantable pump according to  claim 6 , wherein the plurality of electromagnetic coils include six electromagnetic coils. 
     
     
         8 . The implantable pump according to  claim 2 , wherein axes of the electromagnetic coils are parallel to the blood flow. 
     
     
         9 . The implantable pump according to  claim 2 , wherein the plurality of magnetic coils are configured to generate an axial magnetic field along a main axis of the implantable pump.