Don Irwin Olsen
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.

5326344, Jul 5, 1994

Nov 9, 1992

7/953409

Gunter W. Bramm - Munich, DE
Don B. Olsen - Salt Lake City UT

Life Extenders Corporation - Redlands CA

A61N 110, A61N 1362, F04B 1700, B63H 300

623 3

The impellor of a blood pump is supported by permanent magnets on the impellor and pump housing and stabilized by an electromagnet on the housing. A control circuit supplies current to the electromagnet to maintain the axial position of the impellor at a control position in which the impellor is in mechanical equilibrium under permanent magnet forces and static axial forces on the impellor to minimize energy consumption in the support of the impellor. The impellor is rotated magnetically and stator coils in the housing are supplied with electric currents having a frequency and amplitude adjusted in relation to blood pressure at the pump inlet to match the flow characteristics of the pump to physiological characteristics of the natural heart. A cavity is formed in the impellor to match the average specific gravity of the impellor and portions of the suspension and drive systems thereon to the specific gravity of blood to further minimize power consumption by the pump. A valve member can be formed on the impellor to mate with a restriction in the pump inlet for pumps used to assist the pumping action of the natural heart.

7070398, Jul 4, 2006

Sep 24, 2004

10/949884

Don B. Olsen - Salt Lake City UT, US
Paul E. Allaire - Charlottesville VA, US
Houston G. Wood - Crozet VA, US
Ronald Kipp - Willowstreet PA, US
Wei Jiang - Charlottesville VA, US
Zongli Lin - Charlottesville VA, US
Guoxin Li - Charlottesville VA, US

Medforte Research Foundation - Salt Lake City UT

A61M 1/10, F04B 17/00

417353, 417356, 417365, 41742312, 623 314

A blood pump has an impeller rotatably disposed and magnetically suspended within a cavity of a stator by a plurality of magnetic bearings including an axial bearing to support the impeller axially in the cavity. The axial bearing includes adjacent impeller magnets and adjacent stator magnets with axially aligned polarities and reverse polarities with respect to adjacent magnets. A motor includes impeller magnets on the impeller and coils and poles associated with the stator. Radial permanent magnet and electromagnetic bearings are also included. The magnetic bearings and the motor have stator magnets or coils and poles disposed radially across the fluid passage from corresponding impeller magnets to define an annular gap positioned radially between the impeller and the stator, and positioned radially between all of the plurality of magnetic bearings, creating a straight through blood path without secondary flow paths.

4981484, Jan 1, 1991

Nov 20, 1989

7/438810

John W. Holfert - Bountiful UT
Don B. Olsen - Salt Lake City UT

A61M 110

623 3

An artificial heart device for producing heart pumping action as part of a total artificial heart implant comprising a housing of elongate configuration enclosing a pumping volume of sufficient capacity to provide adequate blood flow within the living being. A deformable diaphragm structure is attached at its perimeter to an interior housing surface approximately at the largest perimeter of the pumping volume to form a deformable partition deviding the pumping volume into a blood chamber and a drive chamber. The diaphragm structure has a modified hemi-ellipsoidal configuration when fully extended, modification being represented by four sections of substantially equal quadrants formed by intersection of the diaphragm structure with two orthogonal planes oriented in parallel relationship with the vertical axis. The curvature of each medial section of each quadrant is reduced or flattened to form a medial section having a lower profile as compared to surrounding ellipsoidal curvature. This structure reduces occurrence of bi-axial folding and enhancing random folding activity within the diaphragm.

2009003, Feb 12, 2009

Jul 8, 2008

12/169435

Ronald Kipp - Willow Street PA, US
Steven W. Day - Rochester NY, US
Don B. Olsen - Salt Lake City UT, US

H01F 7/02, H02K 21/16

335304, 31015648

A permanent magnet device includes a polarized permanent annular magnet having two oppositely charged poles faces. A magnetically conductive faceplate is disposed on each of the opposite pole faces of the permanent magnet. Each faceplate is sized, shaped and oriented to equally distribute the flux lines emanating from the permanent magnet, and to increase or concentrate the density of the magnetic flux field of a permanent magnet or permanent magnet device.

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.

7229258, Jun 12, 2007

Sep 24, 2004

10/950176

Houston G. Wood - Salt Lake City UT, US
Paul E. Allaire - Charlottesville VA, US
Don B. Olsen - Salt Lake City UT, US
Steven W. Day - Davis CA, US
Xinwei Song - Richmond VA, US
Alex Untaroiu - Charlottesville VA, US
Amy Throckmorton - Charlottesville VA, US

Medforte Research Foundation - Salt Lake City UT
University of Virginia Patent Foundation - Charlottesville VA

F04B 35/04, A61M 1/10

417355, 417365, 41742315, 623 313, 623 314

A blood pump has an impeller rotatably disposed and magnetically suspended within a cavity of a stator by a plurality of magnetic bearings (passive permanent and active electromagnetic) having impeller magnets on the impeller and stator magnets or coils/poles on the stator. A motor includes impeller magnets on the impeller and coils/poles associated with the stator. A single, annular blood flow path extends axially through the cavity between the impeller and the stator, and between the impeller magnets on the impeller and the stator magnets or the coils/poles on the stator.

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.