1
Richard K Wampler: High-capacity intravascular blood pump utilizing percutaneous access. Nimbus, Weissenberger and Peterson, December 2, 1986: US04625712 (275 worldwide citation)

Full-flow cardiac assist is provided for cardiogenic shock patients without major surgery by a miniature axial-flow pump which can be inserted into the heart through the femoral artery and driven via a flexible cable from an external power source. The cable is contained within the catheter attached ...


2
Richard K Wampler, John W Carriker, Kenneth C Butler, John C Moise: Single-stage axial flow blood pump. Nimbus Medical, Weissenberger & Peterson, July 11, 1989: US04846152 (249 worldwide citation)

A miniature high-speed intravascular blood pump is formed as a single stage with two rows of rotor blades and a single row of stator blades within a tubular housing. The rotor's first row produces a mixed centrifugal and axial flow, while the rotor's second row produces a purely axial flow. The blad ...


3
Richard K Wampler: Percutaneous bloom pump with mixed-flow output. Nimbus Medical, Weissenberger & Peterson, April 4, 1989: US04817586 (248 worldwide citation)

The outside diameter of an intravascular axial flow blood pump is reduced without reducing the size of its journal bearings by causing the pumped blood stream to exit through apertures in the cylindrical outside wall of the pump housing between the rotor blades and the rotor journal. This allows the ...


4
Richard K Wampler: High-frequency transvalvular axisymmetric blood pump. Nimbus Medical, Weissenberger & Peterson, March 6, 1990: US04906229 (242 worldwide citation)

A high-frequency transvalvular blood pump for temporary cardiac assist provides suction to decompress the ventricular cavity during both systole and diastole. The intake end of the pump is connected to a cannula which is inserted into the ventricular cavity through the aortic valve, and which has an ...


5
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 ...


6
John C Moise, Richard K Wampler, Kenneth C Butler: Chronic ventricular assist system. Nimbus Medical, Weissenberger & Peterson, March 13, 1990: US04908012 (236 worldwide citation)

An implantable ventricular assist system uses a small high-speed axial flow blood pump which may be grafted into the patient's circulatory system. The pump includes a blood tube in which the pump rotor and stator are coaxially contained, and a motor stator surrounding the blood duct. A permanent mag ...


7
John W Carriker, Richard K Wampler: Percutaneous axial flow blood pump. Nimbus Medical, Weissenberger & Peterson, July 31, 1990: US04944722 (211 worldwide citation)

The reliability and compactness of a percutaneously insertable intravascular axial flow blood pump are improved by connecting the pump's rotor and drive cable through a resiliently extendable rotor extension. The rotor extension and drive cable fitting are so designed that the thrust bearing surface ...


8
Richard K Wampler: Sealless rotary blood pump with passive magnetic radial bearings and blood immersed axial bearings. Kriton Medical, Gerstman Ellis & McMillin, December 9, 1997: US05695471 (205 worldwide citation)

An implantable rotary blood pump without a shaft seal. The pump includes a rotary element, having a pump impeller on one end. The impeller is specially designed with large, thick blades and tall, narrow blood channels, to minimize hemolysis. The rotary element and the impeller are maintained in radi ...


9
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 ...


10
Richard K Wampler: Sealless rotary blood pump. Kriton Medical, Gerstman Ellis & McMillin, November 24, 1998: US05840070 (134 worldwide citation)

An implantable rotary sealless blood pump is provided. The pump includes a housing having an inlet tube on one end and an impeller casing on the other end. A rotor is mounted for rotation within the housing, with the rotor having an elongated shaft portion and an impeller attached to the shaft porti ...