Heart pump

A heart pump comprising:

• a housing defining a central longitudinal axis, said housing having an inlet means and outlet means;
• a stationary shaft centrally located and axially extending within the housing;
• at least one spider for supporting the shaft within the housing;
• a stator assembly having a plurality of stator core laminations surrounding the stationary shaft, the stator core laminations forming a plurality of axially extending slots circumferentially spaced about the stationary shaft, the stator assembly further comprising stator windings located within the axially extending slots formed by the stator core laminations;
• a shell assembly rotatable about the stator assembly and stationary shaft, said shell assembly being located between the housing and stator assembly and comprising a spiral ridge located on an outerside thereof for pumping blood through the housing between the housing and shell assembly as the shell assembly rotates;
• a plurality of rotor laminations located on an inner side of the shell assembly, the rotor laminations having a plurality of axially extending permanent magnets therebetween being circumferentially spaced about the stationary shaft, said axially extending permanent magnets having magnetic poles facing in a direction tangential to the circumference of the permanent magnets wherein the poles of the permanent magnets oriented about the circumference facing each other having identical polarities;
• a plurality of damping bars extending axially within the rotor laminations and spaced circumferentially about the stationary shaft;
• at least one shorting ring circumferentially spaced about the stationary shaft and contacting the damping bars wherein the shorting rings and damping bars are in electrical conductor relationship;
• a plurality of damping slats circumferentially spaced about the stator assembly and being located between the stator assembly and permanent magnets, said damping slats being in contact with the shorting rings;
• means for supplying power to the stator assembly, said means including a passage extending within the stationary shaft.

A heart pump comprising:

• a housing defining a central longitudinal axis therethrough, said housing having an inlet means and outlet means;
• a stationary shaft extending axially within the housing;
• means for supporting the shaft within the housing;
• a stator assembly mounted about the stationary shaft;
• a shell assembly rotatable about the stator assembly and stationary shaft, said shell assembly being located between the housing and stator assembly and comprising means for pumping blood through the housing between the housing and shell assembly as the shell assembly rotates;
• a plurality of rotor laminations located on an inner side of the shell assembly, said rotor laminations having a plurality of axially extending permanent magnets therebetween, said permanent magnets being circumferentially spaced about the stationary shaft;
• and
• damper winding means mounted within the rotor laminations.