1
Richard K Wampler, David M Lancisi: Rotary blood pump. Kriton Medical, George H Gerstman, Seyfarth Shaw, May 22, 2001: US06234772 (236 worldwide citation)

An implantable rotary sealless blood pump is provided. The pump can include hydrodynamic, magnetic and hybrid, hydrodynamic/magnetic bearings and combinations thereof. The rotor can include a shaft or the pump can be made shaftless. Close clearances may be maintained between the housing and the roto ...


2
Richard K Wampler, David M Lancisi: Active magnetic bearing system for blood pump. Kriton Medical, George H Gerstman, Seyfarth Shaw, July 24, 2001: US06264635 (183 worldwide citation)

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 the motor including a plurality of permanent magnets carried by the impeller and motor stators on ...


3
David M Lancisi, Raymond G Gauthier, Richard K Wampler: Power system for an implantable heart pump. Kriton Medical, George H Seyfarth Shaw Gerstman, November 21, 2000: US06149683 (71 worldwide citation)

A power system for an implantable heart pump is provided. The system includes two batteries, a microprocessor controller, two motor drivers, a multiplexer, two stators and a TET coil. During normal operation, only one battery and one motor driver are in use at a time to drive both stators.


4
Raymond G Gauthier, David M Lancisi, Gregory L Morris: Method and apparatus for controlling brushless DC motors in implantable medical devices. Heartware, John P White Esq, Cooper & Dunham, November 21, 2006: US07138776 (59 worldwide citation)

Methods and apparatus for controlling a polyphase motor in implantable medical device applications are provided. In one embodiment, the polyphase motor is a brushless DC motor. The back emf of a selected phase of the motor is sampled while a drive voltage of the selected phase is substantially zero. ...


5
Hengchu Cao, David M Lancisi: Rotary blood pump with ceramic members. Kriton Medical, George H Seyfarth Shaw Gerstman, December 12, 2000: US06158984 (51 worldwide citation)

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 o ...


6
William D Davis, David M Lancisi: Pump with electrodynamically supported impeller. William D Davis, Davis & Associates, November 4, 2003: US06641378 (50 worldwide citation)

A pump includes an impeller, a stator, and a plurality of permanent magnets forming bearing poles coupled to a selected one of the stator or the impeller. The pump further includes a plurality of shorted coils coupled to the other of the stator and the impeller. The plurality of bearing poles and sh ...


7
Richard K Wampler, David M Lancisi: Rotary blood pump. Thoratec Corporation, Inskeep IP Group, September 28, 2010: US07802966 (43 worldwide citation)

Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pu ...


8
Richard K Wampler, David M Lancisi: Rotary blood pump. Myrakelle, Inskeep IP Group, October 7, 2008: US07431688 (39 worldwide citation)

Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pu ...


9
William D Davis, David M Lancisi: Pump with an electrodynamically supported impeller and a hydrodynamic bearing between the impeller and the stator. Davis & Associates, William D Davis, January 25, 2005: US06846168 (34 worldwide citation)

A pump includes an impeller, a stator, and a plurality of magnets forming bearing poles coupled to a selected one of the stator or the impeller. The pump further includes a plurality of shorted coils coupled to the other of the stator and the impeller. The plurality of bearing poles and shorted coil ...


10
Richard K Wampler, David M Lancisi: Rotary blood pump. Thoratec Corporation, Inskeep IP Group, March 23, 2010: US07682301 (31 worldwide citation)

Various “contactless” bearing mechanisms including hydrodynamic, hydrostatic, and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. These design features may be combined. In one embodiment, a pump housing has a spindle extending from a wall of the pump ...