Rotary blood pump with ceramic members
AssigneeKriton Medical, Inc.
InventorsHengchu Cao, David M. Lancisi
Life of this patent
Estimating the term…
Abstract
An implantable rotary blood pump including a rotor mounted for rotation within a pump housing. The rotor has a shaft portion and an impeller carried by the shaft portion. A rotor motor is provided, with a motor including a plurality of permanent magnets carried by the impeller and motor stators on opposite sides of the impeller. Structural members are provided between the impeller and stators to provide structural support and hermetical sealing. The structural members comprise biocompatible, corrosion resistant, electrically non-conducting ceramic material, which alleviate eddy current losses.
Claims20
A rotary blood pump, comprising:
- a pump housing;
- a rotor mounted for rotation within said housing, said rotor having an impeller;
- a rotor motor, said motor including a plurality of permanent magnets carried by said impeller and a motor stator located within said housing;
- and
- a structural member positioned between the impeller and stator comprising a biocompatible, corrosion resistant ceramic materials to reduce eddy current losses.
A rotary blood pump, comprising:
- a pump housing;
- a rotor mounted for rotation within said housing, said rotor having an impeller;
- a rotor motor, said motor including a plurality of permanent magnets carried by said impeller, a first motor stator positioned on one side of said impeller and a second motor stator positioned on an opposite side of said impeller;
- structural members positioned between the impeller and stators, said structural members comprising ceramic material to alleviate eddy current losses.
A rotary blood pump, comprising:
- a pump housing comprising a ceramic material;
- a rotor mounted for rotation within said housing;
- said rotor having an impeller;
- a rotor motor, said motor including a plurality of permanent magnets carried by said impeller, a first motor stator positioned on one side of said impeller and a second motor stator positioned on an opposite side of said impeller;
- structural members positioned between the impeller and stators, said structural members comprising ceramic material to reduce eddy current losses that is selected from the group consisting of aluminum oxide, zirconium oxide, yttria partial stabilized zirconia, magnesia-partial-stabilized zirconia, ceria-partial-stabilized zirconia, titanium oxide, magnesia, zirconia-toughened alumina, ruby, sapphire, single crystal alumina, cubic zirconia, quartz, fused silica, silicon nitride and aluminum nitride;
- radial magnetic bearings carried by said shaft portion;
- radial magnetic bearings carried by said housing;
- said structural members providing structural support and hermetical sealing;
- and
- said pump housing being sufficiently compact to be implantable in a human body.
A method for reducing eddy current losses in a rotary blood pump, which comprises the steps of:
- providing a pump housing;
- providing a rotor for rotation within said housing, said rotor having an impeller;
- providing a rotor motor which includes a plurality of permanent magnets carried by said impeller and a motor stator;
- and
- positioning between said impeller and stator a structural member comprising a biocompatible, corrosion resistant ceramic material.
Dependencies are inferred from the claim text.