Patents by Inventor Brian J. Steffens

Brian J. Steffens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Reducing centrifugal pump bearing wear through dynamic magnetic coupling
    Patent number: 10570904
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: February 25, 2020
    Assignee: Medtronic, Inc.
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • REDUCING CENTRIFUGAL PUMP BEARING WEAR THROUGH DYNAMIC MAGNETIC COUPLING
    Publication number: 20180231004
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Application
    Filed: April 12, 2018
    Publication date: August 16, 2018
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • Reducing centrifugal pump bearing wear through dynamic magnetic coupling
    Patent number: 9945382
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: April 17, 2018
    Assignee: Medtronic, Inc.
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • Reducing Centrifugal Pump Bearing Wear Through Dynamic Magnetic Coupling
    Publication number: 20170045054
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Application
    Filed: October 28, 2016
    Publication date: February 16, 2017
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • Reducing centrifugal pump bearing wear through dynamic magnetic coupling
    Patent number: 9511178
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: December 6, 2016
    Assignee: Medtronic, Inc.
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • Compositions and methods of preparation thereof
    Patent number: 9096839
    Abstract: The present invention provides biological compositions and methods for making the same.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: August 4, 2015
    Assignee: Arteriocyte Medical Systems, Inc.
    Inventors: Tessy Kanayinkal, Laura A. Yonce, Debra Mullins-Hirte, Trevor C. Huang, Rohit Cariappa, Kenneth E. Merte, James R. Keogh, Kevin D. McIntosh, Brian J. Steffens, Asha S. Nayak, Erick L. Johnson
  • Display of target cardiac flow based on cardiac index calculation
    Patent number: 9075511
    Abstract: User interfaces for medical perfusion systems that provide oxygenation, filleting, and recirculation of blood in connection with various medical procedures are provided. In particular, methods of displaying and communicating a desired target flow rate and cardiac index during cardiopulmonary bypass surgeries are provided.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: July 7, 2015
    Assignee: Medtronic, Inc.
    Inventors: Brian J. Steffens, Mark Salzwedel, Mark G. Bearss, Keith D. Rohde
  • REDUCING CENTRIFUGAL PUMP BEARING WEAR THROUGH DYNAMIC MAGNETIC COUPLING
    Publication number: 20140010672
    Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 9, 2014
    Inventors: Roger A. Naidyhorski, Brian J. Steffens, Craig D. Petersen
  • Blood pump system user interface alarm management
    Patent number: 8409124
    Abstract: User interfaces for medical perfusion systems that provide oxygenation, filtering, and recirculation of blood in connection with various medical procedures are provided. In particular, user interfaces for use with blood pumps that assist in managing alarms commonly encountered during cardiopulmonary bypass surgeries are provided.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: April 2, 2013
    Assignee: Medronic, Inc.
    Inventors: Brian J. Steffens, Mark Salzwedel, Mark G. Bearss, Bruce R. Jones, Beth C. Bullemer, William K. Wenger
  • Display of target cardiac flow based on cardiac index calculation
    Patent number: 8382678
    Abstract: User interfaces for medical perfusion systems that provide oxygenation, filtering, and recirculation of blood in connection with various medical procedures are provided. In particular, methods of displaying and communicating a desired target flow rate and cardiac index during cardiopulmonary bypass surgeries are provided.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: February 26, 2013
    Assignee: Medtronic, Inc.
    Inventors: Brian J. Steffens, Mark Salzwedel, Mark G. Bearss, Keith D. Rohde
  • Blood pump system user interface alarm management
    Publication number: 20080221495
    Abstract: User interfaces for medical perfusion systems that provide oxygenation, filtering, and recirculation of blood in connection with various medical procedures are provided. In particular, user interfaces for use with blood pumps that assist in managing alarms commonly encountered during cardiopulmonary bypass surgeries are provided.
    Type: Application
    Filed: October 26, 2007
    Publication date: September 11, 2008
    Inventors: Brian J. Steffens, Mark Salzwedel, Mark G. Bearss, Bruce R. Jones, Beth C. Bullemer, William K. Wenger
  • Display of target cardiac flow based on cardiac index calculation
    Publication number: 20080221465
    Abstract: User interfaces for medical perfusion systems that provide oxygenation, filtering, and recirculation of blood in connection with various medical procedures are provided. In particular, methods of displaying and communicating a desired target flow rate and cardiac index during cardiopulmonary bypass surgeries are provided.
    Type: Application
    Filed: October 26, 2007
    Publication date: September 11, 2008
    Inventors: Brian J. Steffens, Mark Salzwedel, Mark G. Bearss, Keith D. Rohde