Patents by Inventor Jack A. Dant
Jack A. Dant 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).
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Patent number: 10631898Abstract: A spinal stabilization system generally comprises first and second anchor members configured to be secured to first and second vertebrae within a patient's body, a flexible element secured to the first anchor member, and a rigid element secured to the second anchor member. An end portion of the rigid element is coupled to an end portion of the flexible so that the system is able to provide both rigid and dynamic stabilization. The coupling is maintained even if the flexible element relaxes after a period of time within the patient's body.Type: GrantFiled: January 3, 2018Date of Patent: April 28, 2020Assignee: Zimmer Spine, Inc.Inventors: Emmanuel Zylber, Thomas Egli, Rosemary E. Thompson, Markus Froehlich, Giuseppe Cicerchia, Jack A. Dant, Thomas O. Viker, Kevin R. Ley
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Publication number: 20180125534Abstract: A spinal stabilization system generally comprises first and second anchor members configured to be secured to first and second vertebrae within a patient's body, a flexible element secured to the first anchor member, and a rigid element secured to the second anchor member. An end portion of the rigid element is coupled to an end portion of the flexible so that the system is able to provide both rigid and dynamic stabilization. The coupling is maintained even if the flexible element relaxes after a period of time within the patient's body.Type: ApplicationFiled: January 3, 2018Publication date: May 10, 2018Inventors: Emmanuel Zylber, Thomas Egli, Rosemary E. Thompson, Markus Froehlich, Giuseppe Cicerchia, Jack A. Dant, Thomas O. Viker, Kevin R. Ley
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Patent number: 9888944Abstract: A spinal stabilization system generally comprises first and second anchor members configured to be secured to first and second vertebrae within a patient's body, a flexible element secured to the first anchor member, and a rigid element secured to the second anchor member. An end portion of the rigid element is coupled to an end portion of the flexible so that the system is able to provide both rigid and dynamic stabilization. The coupling is maintained even if the flexible element relaxes after a period of time within the patient's body.Type: GrantFiled: May 6, 2015Date of Patent: February 13, 2018Assignee: Zimmer Spine, Inc.Inventors: Emmanuel Zylber, Thomas Egli, Rosemary Thompson, Markus Froehlich, Giuseppe Cicerchia, Jack A. Dant, Thomas O. Viker, Kevin R. Ley
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Publication number: 20170281244Abstract: A transverse connector for coupling between first and second elongate members of a spinal stabilization system. The transverse connector includes a connector arm, a first coupling assembly proximate a first end of the arm, and a second coupling assembly proximate a second end of the arm. The first and second coupling assemblies are secured to the connector arm through a plurality of mating engagement features, such as dovetail grooves.Type: ApplicationFiled: June 22, 2017Publication date: October 5, 2017Inventors: Jack A. Dant, Deborah Lynn Hoch, Eric P. Jerke, Eric J. Lundequam
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Patent number: 9750512Abstract: An adjustable apparatus for guiding medical instruments used in attaching bone plates. The apparatus has a handle assembly, guide member, a spacer, and an actuation member. The actuation member extends from the handle assembly and actuates the spacer between a position adjacent the guide member and a position spaced from the guide member. The spacer has a through hole that may axially align with a lumen extending through the guide member when in the first position and which is moved out of axial alignment with the lumen in the second position. The spacer may function as a depth stop to control the maximum depth a drill bit can extend from the guide member.Type: GrantFiled: October 21, 2013Date of Patent: September 5, 2017Assignee: Zimmer Spine, Inc.Inventors: Eric P. Jerke, Peter G. Schulte, David W. Castleman, Andrew Olson, Jack A. Dant, Eric J. Lundequam, Hugh D. Hestad
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Patent number: 9737341Abstract: A transverse connector for coupling between first and second elongate members of a spinal stabilization system. The transverse connector includes a connector arm, a first coupling assembly proximate a first end of the arm, and a second coupling assembly proximate a second end of the arm. The first and second coupling assemblies are secured to the connector arm through a plurality of mating engagement features, such as dovetail grooves.Type: GrantFiled: November 19, 2015Date of Patent: August 22, 2017Assignee: Zimmer Spine, Inc.Inventors: Jack A Dant, Deborah Lynn Hoch, Eric P Jerke, Eric J Lundequam
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Publication number: 20170079686Abstract: A transverse connector for coupling between first and second vertebral anchors of a spinal stabilization system. The transverse connector includes a first coupling assembly proximate a first end, a second coupling assembly proximate a second end, a first fastener having external threading configured to threadably engage an internal threaded portion of a housing of the first vertebral anchor, and a second fastener having external threading configured to threadably engage an internal threaded portion of a housing of the second vertebral anchor. Each of the first and second fasteners includes a spherical upper surface, such as a spherically concave upper surface. A spherical surface of each of the first and second coupling assemblies mates with the spherical upper surface of the respective fastener to provide multi-axial rotation of the transverse connector relative to the housings to permit a desired orientation of the transverse connector.Type: ApplicationFiled: December 7, 2016Publication date: March 23, 2017Inventors: Jack A. Dant, Christopher Bargsten, Peter Schulte, Hugh D. Hestad, Brad Kessler
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Patent number: 9532810Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.Type: GrantFiled: February 11, 2016Date of Patent: January 3, 2017Assignee: Zimmer Spine, Inc.Inventors: Hugh D Hestad, Jack A Dant, Eric J Lundequam, Eric P Jerke, Deborah Lynn Hoch
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Publication number: 20160157895Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.Type: ApplicationFiled: February 11, 2016Publication date: June 9, 2016Inventors: Hugh D. Hestad, Jack A. Dant, Eric J. Lundequam, Eric P. Jerke, Deborah Lynn Hoch
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Patent number: 9289244Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.Type: GrantFiled: January 27, 2014Date of Patent: March 22, 2016Assignee: Zimmer Spine, Inc.Inventors: Hugh D. Hestad, Jack A. Dant, Eric J. Lundequam, Eric P. Jerke, Deborah L. Hoch
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Publication number: 20160066962Abstract: A transverse connector for coupling between first and second elongate members of a spinal stabilization system. The transverse connector includes a connector arm, a first coupling assembly proximate a first end of the arm, and a second coupling assembly proximate a second end of the arm. The first and second coupling assemblies are secured to the connector arm through a plurality of mating engagement features, such as dovetail grooves.Type: ApplicationFiled: November 19, 2015Publication date: March 10, 2016Inventors: Jack A Dant, Deborah Lynn Hoch, Eric P Jerke, Eric J Lundequam
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Publication number: 20150374414Abstract: A transverse connector for coupling between first and second elongate members of a spinal stabilization system. The transverse connector includes a connector arm, a first coupling assembly proximate a first end of the arm, and a second coupling assembly proximate a second end of the arm. The first and second coupling assemblies are secured to the connector arm through a plurality of mating engagement features, such as dovetail grooves.Type: ApplicationFiled: June 26, 2014Publication date: December 31, 2015Inventors: Jack A. Dant, Deborah L. Hoch, Eric P. Jerke, Eric J. Lundequam
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Patent number: 9220541Abstract: A transverse connector for coupling between first and second elongate members of a spinal stabilization system. The transverse connector includes a connector arm, a first coupling assembly proximate a first end of the arm, and a second coupling assembly proximate a second end of the arm. The first and second coupling assemblies are secured to the connector arm through a plurality of mating engagement features, such as dovetail grooves.Type: GrantFiled: June 26, 2014Date of Patent: December 29, 2015Assignee: Zimmer Spine, Inc.Inventors: Jack A. Dant, Deborah L. Hoch, Eric P. Jerke, Eric J. Lundequam
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Publication number: 20150230827Abstract: A spinal stabilization system generally comprises first and second anchor members configured to be secured to first and second vertebrae within a patient's body, a flexible element secured to the first anchor member, and a rigid element secured to the second anchor member. An end portion of the rigid element is coupled to an end portion of the flexible so that the system is able to provide both rigid and dynamic stabilization. The coupling is maintained even if the flexible element relaxes after a period of time within the patient's body.Type: ApplicationFiled: May 6, 2015Publication date: August 20, 2015Inventors: Emmanuel Zylber, Thomas Egli, Rosemary Thompson, Markus Froehlich, Giuseppe Cicerchia, Jack A. Dant, Thomas O. Viker, Kevin R. Ley
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Patent number: 9034018Abstract: A spinal stabilization system generally comprises first and second anchor members configured to be secured to first and second vertebrae within a patient's body, a flexible element secured to the first anchor member, and a rigid element secured to the second anchor member. An end portion of the rigid element is coupled to an end portion of the flexible so that the system is able to provide both rigid and dynamic stabilization. The coupling is maintained even if the flexible element relaxes after a period of time within the patient's body.Type: GrantFiled: September 23, 2011Date of Patent: May 19, 2015Assignee: Zimmer Spine, Inc.Inventors: Emmanuel Zylber, Thomas Egli, Rosemary Thompson, Markus Froehlich, Giuseppe Cicerchia, Jack A. Dant, Thomas O. Viker, Kevin R. Ley
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Publication number: 20150112353Abstract: An adjustable apparatus for guiding medical instruments used in attaching bone plates. The apparatus has a handle assembly, guide member, a spacer, and an actuation member. The actuation member extends from the handle assembly and actuates the spacer between a position adjacent the guide member and a position spaced from the guide member. The spacer has a through hole that may axially align with a lumen extending through the guide member when in the first position and which is moved out of axial alignment with the lumen in the second position. The spacer may function as a depth stop to control the maximum depth a drill bit can extend from the guide member.Type: ApplicationFiled: October 21, 2013Publication date: April 23, 2015Applicant: Zimmer Spine, Inc.Inventors: Eric P. Jerke, Peter G. Schulte, David W. Castleman, Andrew Olson, Jack A. Dant, Eric J. Lundequam, Hugh D. Hestad
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Patent number: 8900310Abstract: An intervertebral or spinal implant having a spacer, a cage, and a locking mechanism, where the locking mechanism may be configured to facilitate a connection between the spacer and the cage. In some cases, the spacer may include a distal end wall, a proximal end wall, a first lateral wall, and a second lateral wall, where the locking mechanism may be situated at the proximal end wall adjacent a receiving opening in the proximal end wall. The implant may have one or more spikes extending from a top and/or a bottom of the spacer to facilitate stabilizing the implant between vertebrae after insertion of the implant in the spinal column.Type: GrantFiled: April 5, 2012Date of Patent: December 2, 2014Assignee: Zimmer Spine, Inc.Inventors: Daniel A. Carlson, Hugh D. Hestad, Jack A. Dant, Reginald J. Davis
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Publication number: 20140142640Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.Type: ApplicationFiled: January 27, 2014Publication date: May 22, 2014Applicant: ZIMMER SPINE, INC.Inventors: HUGH D. HESTAD, JACK A. DANT, ERIC J. LUNDEQUAM, ERIC P. JERKE, DEBORAH L. HOCH
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Patent number: 8685064Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.Type: GrantFiled: September 14, 2012Date of Patent: April 1, 2014Assignee: Zimmer Spine, Inc.Inventors: Hugh D. Hestad, Jack A. Dant, Eric J. Lundequam, Eric P. Jerke, Deborah L. Hoch
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Publication number: 20130268076Abstract: An intervertebral or spinal implant having a spacer, a cage, and a locking mechanism, where the locking mechanism may be configured to facilitate a connection between the spacer and the cage. In some cases, the spacer may include a distal end wall, a proximal end wall, a first lateral wall, and a second lateral wall, where the locking mechanism may be situated at the proximal end wall adjacent a receiving opening in the proximal end wall.Type: ApplicationFiled: April 5, 2012Publication date: October 10, 2013Applicant: ZIMMER SPINE, INC.Inventors: Daniel A. Carlson, Hugh D. Hestad, Jack A. Dant, Reginald J. Davis