Pratap Singh Khanwilkar
Land Surveyors in Salt Lake City, UT

6595762, Jul 22, 2003

Oct 1, 2001

09/968690

Pratap S. Khanwilkar - Salt Lake City UT
Paul E. Allaire - Charlottesville VA
Gill B. Bearnson - Salt Lake City UT
Don B. Olsen - Salt Lake City UT
Eric H. Maslen - Earlysville VA
James W. Long - Holladay UT

MedQuest products, Inc. - Salt Lake CA
University of Virginia Patent Foundation - Charlottesville VA

F04B 17100

4174237, 417356, 417420, 415900

An apparatus and method for a centrifugal fluid pump for pumping sensitive biological fluids, which includes (i) an integral impeller and rotor which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings and rotated by an integral motor, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf—all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

6394769, May 28, 2002

Jun 23, 2000

09/602471

Gill B. Bearnson - Salt Lake City UT
Pratap S. Khanwilkar - Salt Lake City UT
James W. Long - Holladay UT
Jed C. Ludlow - North Salt Lake UT
Brad E. Paden - Santa Barbara CA
Chen Chen - Santa Barbara CA
Dave B. Paden - Goleta CA
Don B. Olsen - Salt Lake City UT
James Antaki - Allison Park PA
Paul E. Allaire - Charlottesville VA
Michael Baloh - Charlottesville VA

Medquest Products, Inc. - Salt Lake City UT
University of Virginia Patent Foundation - Charlottesville VA

F04B 1700

4174237, 41742312, 417356, 415900

An inventive blood pump in accordance with this invention includes a housing that has inlet and outlet ports for receiving and discharging blood. A rotor is positioned in the housings interior for pumping blood between the housings inlet and outlet ports, with the rotor being capable of motion in three translational and three rotational axes. An assembly for magnetically suspending and rotating the rotor in a contact-free manner with respect to the housing includes only one electromagnetic bearing that actively controls motion of the rotor with respect to one axis selected from the rotors three translational and three rotational axes, an electromagnetic motor that actively drives motion of the rotor with respect to one of its three rotational axes, and magnetic bearings for passively controlling motion of the rotor with respect to the remaining four of its translational and rotational axes. The inventive blood pump can also be incorporated into an artificial heart.

7462019, Dec 9, 2008

Apr 22, 1999

09/673922

Paul E. Allarie - Charlottesville VA, US
Gill B. Bearnson - Salt Lake City UT, US
Ron Flack - Earlysville VA, US
Pratap S. Khanwilkar - Salt Lake City UT, US
B. Ajit Kumar - Salt Lake City UT, US
Don B. Olsen - Salt Lake City UT, US
Jeffrey Decker - Westerville OH, US
Michael Baloh - Charlottesville VA, US

F04B 17/03, A61M 1/10

41742312, 604151, 623 314

A pump for pumping sensitive fluids, such as blood, having no mechanical contact between the impeller and any other structure. The pump comprises a pump housing, an impeller disposed within the pump housing, a magnetic bearing system for supporting and stabilizing the impeller in five degrees of freedom, and a conformally shaped magnetically linked motor for rotating the impeller. The magnetic bearing system and motor advantageously comprise electromagnets and permanent magnets for stability and control of the impeller, and to reduce size, weight, and pump power consumption. Permanent and electromagnets are disposed on the pump housing and permanent magnets are disposed on the impeller such that by controlling electric current through the electromagnets on the housing, the magnetically suspended impeller functions as the rotor, and the housing as the stator of a D. C. motor. The system advantageously allows for sensing of relative impeller position and dynamic properties without the need for additional sensors. The fluid inlet, pump impeller, housing, and other components are configured such that flow patterns are as smooth and laminar as possible to reduce damage to the fluid, and such that eddies, flow separation, and re-circulation are reduced.

6074180, Jun 13, 2000

May 2, 1997

8/850598

Pratap S. Khanwilkar - Salt Lake City UT
Paul E. Allaire - Charlottesville VA
Gill Brent Bearnson - Salt Lake City UT
Don B. Olsen - Salt Lake City UT
Eric H. Maslen - Earlysville VA
James W. Long - Salt Lake City UT

Medquest Products, Inc. - Salt Lake City UT
University of Utah Research Foundation - Salt Lake City UT
University of Virginia Patent Foundation - Charlottesville VA

F04B 1700

417356

An apparatus and method for a centrifugal fluid pump for pumping sensitive biological fluids, which includes (i) an integral impeller and rotor which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings and rotated by an integral motor, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf--all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

6302661, Oct 16, 2001

Dec 10, 1999

9/459146

Pratap S. Khanwilkar - Salt Lake City UT
Paul E. Allaire - Charlottesville VA
Gill Brent Bearnson - Salt Lake City UT
Don B. Olsen - Salt Lake City UT
Eric H. Maslen - Earlysville VA
James W. Long - Salt Lake City UT

F04B 1700

4174237

An apparatus and method for a centrifugal pump for pumping sensitive biological fluids which includes (i) an integral impeller and rotor which is electromagnetically supported and rotated, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing and control algorithms--all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

6270831, Aug 7, 2001

Apr 30, 1998

9/071371

B. Ajit Kumar - Salt Lake City UT
Pratap Khanwilkar - Salt Lake City UT
Don B. Olsen - Salt Lake City UT

MedQuest Products, Inc. - Salt Lake City UT
University of Utah Research Foundation - Salt Lake City UT

A61L 1300

427 224

A conductive, non-stick coating is provided using a ceramic material which is conductive, flexible and provides a surface which exhibits the property of lubricity. A room or near room temperature manufacturing process produces a coating of titanium nitride on a substrate, where the coating is amorphous if the substrate is a solid material including plastics, composites, metals, magnets, and ceramics, enabling the substrate to bend without damaging the coating. The coating can also be applied as a conformal coating on a variety of substrate shapes, depending upon the application. The coating is bio-compatible and can be applied to a variety of medical devices.

2008024, Oct 2, 2008

Oct 26, 2007

11/925294

Paul E. Allaire - Charlottesville VA, US
Gill B. Bearnson - Salt Lake City UT, US
Ronald D. Flack - Pittsville VA, US
Donald B. Olsen - Salt Lake City UT, US
James W. Long - Salt Lake City UT, US
Ajit Kumar B. Nair - Milpitas CA, US
Pratap S. Khanwilkar - Salt Lake City UT, US
Jeffrey Decker - Streetsboro OH, US
Michael J. Baloh - Detroit MI, US

WORLD HEART, INC. - Salt Lake City UT

F04B 17/00, B63H 1/02

417420

A pump for pumping sensitive fluids, such as blood, has no mechanical contact between the impeller and any other structure.