Patents by Inventor Keith M. Johnson

Keith M. Johnson 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).

  • Patent number: 11117007
    Abstract: A fire suppression nozzle can include a first fluid channel configured to be in fluid communication with a first fluid having a first flow velocity and a second fluid channel configured to be in fluid communication with a second fluid having a second flow velocity. A mixer can be disposed between the first fluid channel and the second fluid channel such that the mixer is configured to induce streamwise vorticity in at least the first fluid exiting first fluid channel to cause mixing of the first fluid and the second fluid to reduce a flow speed of a mixture of the first fluid and the second fluid.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: September 14, 2021
    Assignee: Carrier Corporation
    Inventors: Paul M. Johnson, Duane C. Mccormick, May L. Corn, Sudarshan N. Koushik, Mikhail Morozov, Changmin Cao, Christopher T. Chipman, Keith A. Post
  • Patent number: 8029564
    Abstract: A prosthetic heart valve system including a prosthetic heart valve and a deflection device. The deflection device includes a line and a connector assembly including a tensioning component. The line interconnects and passes through free ends of stent posts associated with the heart valve, and is further connected to the tensioning component. The tensioning component is transitionable to a tensioning state in which the line is tensioned to inwardly deflect the stent posts. In this regard, the tensioning component is self-locking relative to the line in the tensioning state, and an entirety of the line extending distal the tensioning device does not extend beyond a stent portion of the heart valve opposite the stent posts. In a preferred embodiment, a holder body is further included, coupled to the heart valve apart from the deflection device.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: October 4, 2011
    Assignee: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Publication number: 20090198323
    Abstract: A prosthetic heart valve system including a prosthetic heart valve and a deflection device. The deflection device includes a line and a connector assembly including a tensioning component. The line interconnects and passes through free ends of stent posts associated with the heart valve, and is further connected to the tensioning component. The tensioning component is transitionable to a tensioning state in which the line is tensioned to inwardly deflect the stent posts. In this regard, the tensioning component is self-locking relative to the line in the tensioning state, and an entirety of the line extending distal the tensioning device does not extend beyond a stent portion of the heart valve opposite the stent posts. In a preferred embodiment, a holder body is further included, coupled to the heart valve apart from the deflection device.
    Type: Application
    Filed: February 17, 2009
    Publication date: August 6, 2009
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Patent number: 7503929
    Abstract: A prosthetic heart valve system including a prosthetic heart valve and a deflection device. The deflection device includes a line and a connector assembly including a tensioning component. The line interconnects and passes through free ends of stent posts associated with the heart valve, and is further connected to the tensioning component. The tensioning component is transitionable to a tensioning state in which the line is tensioned to inwardly deflect the stent posts. In this regard, the tensioning component is self-locking relative to the line in the tensioning state, and an entirety of the line extending distal the tensioning device does not extend beyond a stent portion of the heart valve opposite the stent posts. In a preferred embodiment, a holder body is further included, coupled to the heart valve apart from the deflection device.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: March 17, 2009
    Assignee: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Patent number: 7468073
    Abstract: A valve system including an aortic valve and a holder. The holder includes a holder body, which has a central portion, engagable with a holder handle, and downwardly extending leg portions that engage the valve in the areas between the commissure posts. The central portion of the holder further includes a spool located between the commissure posts, rotatable by an attached handle. Rotation of the spool draws in a tensile member passing through the commissure posts, drawing the commissure posts inward toward the spool. The tensile member passes through guides formed in the holder, configured such that they define the maximum available inward deflection of the commissure posts at the point at which the portions of the tensile member between the commissure posts assume straight configurations.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: December 23, 2008
    Assignee: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Patent number: 7189258
    Abstract: A valve system including an aortic valve and a holder. The holder includes a holder body, which has a central portion, engagable with a holder handle, and downwardly extending leg portions that engage the valve in the areas between the commissure posts. The central portion of the holder further includes a spool located between the commissure posts, rotatable by an attached handle. Rotation of the spool draws in a tensile member passing through the commissure posts, drawing the commissure posts inward toward the spool. The tensile member passes through guides formed in the holder, configured such that they define the maximum available inward deflection of the commissure posts at the point at which the portions of the tensile member between the commissure posts assume straight configurations.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: March 13, 2007
    Assignee: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Patent number: 7033390
    Abstract: A prosthetic heart valve system including a prosthetic heart valve and a deflection device. The deflection device includes a line and a connector assembly including a tensioning component. The line interconnects and passes through free ends of stent posts associated with the heart valve, and is further connected to the tensioning component. The tensioning component is transitionable to a tensioning state in which the line is tensioned to inwardly deflect the stent posts. In this regard, the tensioning component is self-locking relative to the line in the tensioning state, and an entirety of the line extending distal the tensioning device does not extend beyond a stent portion of the heart valve opposite the stent posts. In a preferred embodiment, a holder body is further included, coupled to the heart valve apart from the deflection device.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: April 25, 2006
    Assignee: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Publication number: 20040024451
    Abstract: A prosthetic heart valve system including a prosthetic heart valve and a deflection device. The deflection device includes a line and a connector assembly including a tensioning component. The line interconnects and passes through free ends of stent posts associated with the heart valve, and is further connected to the tensioning component. The tensioning component is transitionable to a tensioning state in which the line is tensioned to inwardly deflect the stent posts. In this regard, the tensioning component is self-locking relative to the line in the tensioning state, and an entirety of the line extending distal the tensioning device does not extend beyond a stent portion of the heart valve opposite the stent posts. In a preferred embodiment, a holder body is further included, coupled to the heart valve apart from the deflection device.
    Type: Application
    Filed: January 2, 2003
    Publication date: February 5, 2004
    Applicant: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Publication number: 20030125805
    Abstract: A valve system including an aortic valve and a holder. The holder includes a holder body, which has a central portion, engagable with a holder handle, and downwardly extending leg portions that engage the valve in the areas between the commissure posts. The central portion of the holder further includes a spool located between the commissure posts, rotatable by an attached handle. Rotation of the spool draws in a tensile member passing through the commissure posts, drawing the commissure posts inward toward the spool. The tensile member passes through guides formed in the holder, configured such that they define the maximum available inward deflection of the commissure posts at the point at which the portions of the tensile member between the commissure posts assume straight configurations.
    Type: Application
    Filed: April 25, 2002
    Publication date: July 3, 2003
    Applicant: Medtronic, Inc.
    Inventors: Keith M. Johnson, Jack D. Lemmon, Joseph C. Morrow, Timothy R. Ryan
  • Patent number: 5766240
    Abstract: An implantable prosthetic heart valve with a suturing ring having an interiorly disposed split ring of constant diameter for securing the suturing ring fabric to the heart valve body and providing a constant rotational torque for facilitating rotation of the heart valve body with respect to the suturing ring. The split ring is formed of a stiff band having opposed split ring ends that are drawn together and held in place by fixation cords. The split ring may include flanges extending in the inflow and/or outflow directions to inhibit passage of suture needles through inflow and/or outflow rim bands of the suturing ring fabric to encourage proper surgical installation.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: June 16, 1998
    Assignee: Medtronic, Inc.
    Inventor: Keith M. Johnson
  • Patent number: 5449384
    Abstract: A prosthetic heart valve having a frame comprising a plurality of struts joined together at a common point and extending radially from the common point to free ends spaced from one another and a plurality of preserved tissue valve leaflets, each having a free edge, mounted to said frame means such that said free edges of said leaflets extend between the free ends of said frame struts. Each of the leaflets are provided with an associated strip of aortic tissue and the strips of aortic tissue are joined to one another to enclose the frame struts so that no synthetic materials are exposed to the bloodstream with the exception of suture material used to join the adjacent strips of aortic tissue.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: September 12, 1995
    Assignee: Medtronic, Inc.
    Inventor: Keith M. Johnson
  • Patent number: 4808180
    Abstract: An improved heart valve having an annular valve housing and two leaflets supported for pivotable movement within the annular valve housing. Each leaflet is pivoted about an axis displaced from the center of the valve housing. When open, the leaflets pivot away from the center of the valve housing allowing for central flow. The valve leaflets are provided with curved indentations with engage curved projections from the valve housing which serve both to retain the valve leaflets within the housing and to define and control their pivotal movement during opening and closing.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: February 28, 1989
    Assignee: Medtronic, Inc.
    Inventor: Keith M. Johnson
  • Patent number: 4339831
    Abstract: A synthetic leaflet aortic and mitral heart valve for use in replacement of diseased natural heart valves having a flexible, curved framework, a flexible membrane attached to the framework and fixation means for attaching the valve to the tissue annulus. The framework consists of at least three curved flexible valve struts, each joined together at one end to a common central point of the valve and extending in the same direction radially at equal angles so that the free ends are unattached and at a distance from one another. The free ends are provided with sewing pads for artificial attachment of each free end separately to the natural tissue annulus or to an artificial annulus reconstruction ring which itself is sutured to the tissue annulus to restore its symmetry.
    Type: Grant
    Filed: March 27, 1981
    Date of Patent: July 20, 1982
    Assignee: Medtronic, Inc.
    Inventor: Keith M. Johnson