Patents by Inventor James R. Ringdal

James R. Ringdal 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).

  • Prosthetic heart valve with increased lumen
    Patent number: 6730122
    Abstract: A prosthetic heart valve for replacing a native heart valve is provided and includes a generally circular heart valve body having an inner wall defining a lumen configured to allow blood flow therethrough. Occluders are configured to rotate about opposed occluder ends between an open position and a closed position. The minor radius arcs cooperate with the occluders to allow the occluders to block blood flow through lumen when in a closed position yet provide an increased lumen when the occluders are in an open position.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 4, 2004
    Assignee: St. Jude Medical, Inc.
    Inventors: Karl K. Pan, James R. Ringdal, Steven D. Kruse
  • Prosthetic heart valve with increased valve lumen
    Patent number: 6719790
    Abstract: A heart valve prosthesis having a valve housing providing a lumen therethrough. The valve housing has a first annulus on one end and a second annulus on the other end spaced apart from the first annulus. A suture cuff is used for attaching the valve housing to heart tissue of a patient. The cuff is attached between the first annulus and the second annulus. The cuff is positioned such that prosthesis is attached in a supra-annular position relative to a tissue annulus of the heart. The design allows for an increased valve lumen.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: April 13, 2004
    Assignee: St. Jude Medical, Inc.
    Inventors: Avrom M. Brendzel, James R. Ringdal, Guy P. Vanney
  • Prosthetic heart valve with increased valve lumen
    Publication number: 20020198595
    Abstract: A heart valve prosthesis having a valve housing providing a lumen therethrough. The valve housing has a first annulus on one end and a second annulus on the other end spaced apart from the first annulus. A suture cuff is used for attaching the valve housing to heart tissue of a patient. The cuff is attached between the first annulus and the second annulus. The cuff is positioned such that prosthesis is attached in a supra-annular position relative to a tissue annulus of the heart. The design allows for an increased valve lumen.
    Type: Application
    Filed: May 21, 2002
    Publication date: December 26, 2002
    Inventors: Avrom M. Brendzel, James R. Ringdal, Guy P. Vanney
  • Prosthetic heart valve with increased valve lumen
    Patent number: 6391053
    Abstract: A heart valve prosthesis having a valve housing providing a lumen therethrough. The valve housing has a first annulus on one end and a second annulus on the other end spaced apart from the first annulus. A suture cuff is used for attaching the valve housing to heart tissue of a patient. The cuff is attached between the first annulus and the second annulus. The cuff is positioned such that prosthesis is attached in a supra-annular position relative to a tissue annulus of the heart. The design allows for an increased valve lumen.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: May 21, 2002
    Assignee: St. Jude Medical, Inc.
    Inventors: Avrom M. Brendzel, James R. Ringdal, Guy P. Vanney
  • Prosthetic heart valve with increased valve lumen
    Patent number: 6007577
    Abstract: A heart valve prosthesis having a valve housing providing a lumen therethrough. The valve housing has a first annulus on one end and a second annulus on the other end spaced apart from the first annulus. A suture cuff is used for attaching the valve housing to heart tissue of a patient. The cuff is attached between the first annulus and the second annulus. The cuff is positioned such that prosthesis is attached in a supra-annular position relative to a tissue annulus of the heart. The design allows for an increased valve lumen.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: December 28, 1999
    Assignee: St. Jude Medical, Inc.
    Inventors: Guy P. Vanney, Avrom M. Brendzel, James R. Ringdal