Patents by Inventor B. Thomas Barker
B. Thomas Barker 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: 7377922Abstract: Embodiments of a device and method for connecting a bone fastener, for example a spinal screw, to an elongated member are disclosed. In one embodiment, a body having channels to receive the fastener and elongated member is tapered and has an aperture for a locking member. A tapered washer slides over the body. The tapered washer has an inner diameter that is smaller than part of the tapered portion of the body allowing it to engage the body. The fastener passes through the body and engages the washer. An offsetting member slides over the body. The body slides over the elongated member and the offsetting member offsets the elongated member from the spinal fastener and contacts each in two differing locations. A locking member is inserted into a threaded aperture in the body to apply a compressive force that compresses all of the members preventing relative motion of the components.Type: GrantFiled: April 15, 2004Date of Patent: May 27, 2008Assignee: Warsaw Orthopedic, Inc.Inventor: B. Thomas Barker
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Patent number: 7326251Abstract: An interbody spacer includes concave lateral surfaces extending at an angle with respect to the longitudinal axis. In one aspect, the interbody spacer includes upper and lower convex surfaces defined by an arc extending from a center point offset from the spacer midpoint. In another aspect, lateral edges of the upper and lower surfaces are also defined by convex arcs extending from a center point offset from the spacer midpoint.Type: GrantFiled: April 1, 2003Date of Patent: February 5, 2008Assignee: SDGI Holdings, Inc.Inventors: Peter McCombe, B. Thomas Barker, William Sears, David Warmbold, Russell Powers
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Patent number: 7261715Abstract: A connecting device is provided for use in orthopedic surgery, for example to connect a spinal rod and a vertebral screw or hook. The connector generally includes a receiver member for receiving an elongated member, and an grommet member for receiving a bone fixation member. The grommet member is inserted into the receiver member so that the receiver member and grommet member are rotatably connected. One or more disks may be placed between the receiver member and grommet member to assist in locking the device.Type: GrantFiled: November 24, 2003Date of Patent: August 28, 2007Assignee: SDGI Holdings, Inc.Inventors: Alan Rezach, Matthew M. Morrison, Terry Sites, Joshua Beery, B. Thomas Barker, Harold S. Taylor, Ryan E. Schumacher
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Patent number: 7252670Abstract: A multi-axial bone fixation implant includes an elongated member, one or more bone anchor assemblies, and stabilizer members fitted within the elongated member. A bolt having a bone-threaded end and a machine-threaded end and an enlarged medial portion is also provided. The bolt is anchored into a bone, and its machine-threaded end passes through the elongated member and the stabilizer, and is engaged by a coupled washer and nut. The washer includes an oblong aperture, and the nut includes a projecting sleeve. The sleeve is inserted into the washer and expanded, and the washer retains the sleeve without impairing relative rotatability or translatability of the nut and washer. When locked by the nut and washer, the enlarged portion of the bolt is forced against the stabilizer, which locks against the elongated member. The elongated member can be fixed with respect to the anchor at an infinite number of multi-axial angles.Type: GrantFiled: February 10, 2004Date of Patent: August 7, 2007Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Patent number: 6858031Abstract: A spinal implant system is disclosed for the fixation of bone segments in the spine. The system includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone anchor is attached to a bone, and the elongated member and stabilizer are fitted over the bone anchor. A rounded washer and nut having a corresponding rounded underside surface are fitted on to the bone anchor over the elongated member, and tightened. The configuration of the bone anchor assembly, including an intermediate portion of the bone anchor, the arcuate washer, and the nut, along with the configuration of the sliding support, allows multi-axial positioning of the bone anchor with respect to the elongated member at a plurality of locations along a slotted member.Type: GrantFiled: August 28, 2001Date of Patent: February 22, 2005Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Publication number: 20040199252Abstract: An apparatus and method for supporting upper and lower vertebral bodies, including first and second end members adapted for engagement with the vertebral bodies, and at least one elongate support member coupled between the end members to maintain an axial space between the vertebral bodies. In one aspect of the invention, each of the end members has a parametrical or horseshoe-shaped configuration extending about an open inner region and defining a lateral passage communicating with the open inner region to facilitate insertion of the apparatus or the individual end members into the intervertebral space via a posterior surgical approach. In a further aspect of the invention, a fusion member is positioned within the axial space to promote bony fusion between the upper and lower vertebral bodies.Type: ApplicationFiled: April 3, 2003Publication date: October 7, 2004Inventors: William Sears, B. Thomas Barker
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Publication number: 20040199251Abstract: An interbody spacer includes concave lateral surfaces extending at an angle with respect to the longitudinal axis. In one aspect, the interbody spacer includes upper and lower convex surfaces defined by an arc extending from a center point offset from the spacer midpoint. In another aspect, lateral edges of the upper and lower surfaces are also defined by convex arcs extending from a center point offset from the spacer midpoint.Type: ApplicationFiled: April 1, 2003Publication date: October 7, 2004Applicant: SDGI Holdings, Inc.Inventors: Peter McCombe, B. Thomas Barker, William Sears, David Warmbold, Russell Powers
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Publication number: 20040162558Abstract: A spinal plate including a plate portion having an upper side and an opposite lower side, a connector portion that is integrally attached to the upper side of the plate portion and defining a channel sized to receive an elongate rod therein, and at least one bone engagement member extending from the lower side of the plate portion and adapted for engagement with bone. In one embodiment, the connector portion is formed integral with the plate portion so as to define a unitary, single-piece structure. In another embodiment, the bone engagement member comprises one or more prongs formed integral with the plate portion and/or one or more bone screws extending through corresponding openings in the plate portion. In certain embodiments, the spinal plate includes a pair of connector portions integrally attached to the upper side of the plate portion and defining channels, each sized to receive an elongate rod therein.Type: ApplicationFiled: March 20, 2003Publication date: August 19, 2004Inventors: Sajan K. Hegde, B. Thomas Barker, Eric S. Heinz, Russell Powers
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Publication number: 20040158251Abstract: A multi-axial bone fixation implant includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone bolt having cancellous threads on one end and machine threads at the opposing end and an enlarged portion between these sections is also provided. The bone bolt is anchored into a bone via the cancellous thread end. The machine threaded end passes through an opening of the elongated member and the stabilizer, and is engaged by a coupled washer and nut. The washer includes an undercut within its oblong aperture, and the nut includes a projecting sleeve. The sleeve is inserted into the washer aperture and expanded, so that the undercut retains the sleeve within the washer without impairing the rotatability or translatability of the nut and washer with respect to each other.Type: ApplicationFiled: February 10, 2004Publication date: August 12, 2004Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Publication number: 20040153070Abstract: An occipital plating system includes a plate extending along a longitudinal axis. The plate is engageable to the occiput, and includes at least one coupling member laterally offset relative to the longitudinal axis of the plate. The coupling member extends along a portion of the length of the plate. The at least one coupling member includes a passage to receive a connecting element. The coupling member is structured to at least medially and laterally constrain a portion of a length of the connecting element positioned in the passage.Type: ApplicationFiled: November 10, 2003Publication date: August 5, 2004Inventors: B. Thomas Barker, Eric Steven Heinz, Ian Farey
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Publication number: 20040116929Abstract: A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.Type: ApplicationFiled: December 9, 2003Publication date: June 17, 2004Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Patent number: 6689133Abstract: A multi-axial bone fixation implant includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone bolt having cancellous threads on one end and machine threads at the opposing end and an enlarged portion between these sections is also provided. The bone bolt is anchored into a bone via the cancellous thread end. The machine threaded end passes through an opening of the elongated member and the stabilizer, and is engaged by a coupled washer and nut. The washer includes an undercut within its oblong aperture, and the nut includes a projecting sleeve. The sleeve is inserted into the washer aperture and expanded, so that the undercut retains the sleeve within the washer without impairing the rotatability or translatability of the nut and washer with respect to each other.Type: GrantFiled: October 16, 2001Date of Patent: February 10, 2004Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Patent number: 6660004Abstract: A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.Type: GrantFiled: August 28, 2001Date of Patent: December 9, 2003Assignee: SDGI Holdings, Inc.Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Publication number: 20020029040Abstract: A spinal implant system is disclosed for the fixation of bone segments in the spine. The system includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone anchor is attached to a bone, and the elongated member and stabilizer are fitted over the bone anchor. A rounded washer and nut having a corresponding rounded underside surface are fitted on to the bone anchor over the elongated member, and tightened. The configuration of the bone anchor assembly, including an intermediate portion of the bone anchor, the arcuate washer, and the nut, along with the configuration of the sliding support, allows multi-axial positioning of the bone anchor with respect to the elongated member at a plurality of locations along a slotted member.Type: ApplicationFiled: August 28, 2001Publication date: March 7, 2002Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Publication number: 20020026193Abstract: A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.Type: ApplicationFiled: August 28, 2001Publication date: February 28, 2002Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Publication number: 20020026194Abstract: A multi-axial bone fixation implant includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone bolt having cancellous threads on one end and machine threads at the opposing end and an enlarged portion between these sections is also provided. The bone bolt is anchored into a bone via the cancellous thread end. The machine threaded end passes through an opening of the elongated member and the stabilizer, and is engaged by a coupled washer and nut. The washer includes an undercut within its oblong aperture, and the nut includes a projecting sleeve. The sleeve is inserted into the washer aperture and expanded, so that the undercut retains the sleeve within the washer without impairing the rotatability or translatability of the nut and washer with respect to each other.Type: ApplicationFiled: October 16, 2001Publication date: February 28, 2002Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Patent number: 6315779Abstract: A multi-axial bone fixation implant includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone bolt having cancellous threads on one end and machine threads at the opposing end and an enlarged portion between these sections is also provided. The bone bolt is anchored into a bone via the cancellous thread end. The machine threaded end passes through an opening of the elongated member and the stabilizer, and is engaged by a coupled washer and nut. The washer includes an undercut within its oblong aperture, and the nut includes a projecting sleeve. The sleeve is inserted into the washer aperture and expanded, so that the undercut retains the sleeve within the washer without impairing the rotatability or translatability of the nut and washer with respect to each other.Type: GrantFiled: March 15, 2000Date of Patent: November 13, 2001Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson
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Patent number: 6296642Abstract: Apparatus is disclosed for use in closing a medical device and preventing splaying of wall portions or legs of the medical device while maintaining low profile and minimal bulk of the medical device. The disclosed device is a medical device including a receiver member and a closure member. The receiver member includes an internal reverse angle thread, and the closure member includes an outer reverse angle thread, matable with the inner reverse angle thread. When the closure member is threaded into the receiver member, forces tending to splaying the wall portions or legs of the receiver member cause an interference fit between thread surfaces of the closure member and the receiver member, preventing the splay from occurring.Type: GrantFiled: November 9, 1998Date of Patent: October 2, 2001Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, Craig Squires, B. Thomas Barker
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Patent number: 6280442Abstract: A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.Type: GrantFiled: September 1, 1999Date of Patent: August 28, 2001Assignee: SDGI Holdings, Inc.Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Patent number: 6280445Abstract: A spinal implant system is disclosed for the fixation of bone segments in the spine. The system includes an elongated member, one or more bone anchor assemblies, and stabilizer members which are fitted within the elongated member. A bone anchor is attached to a bone, and the elongated member and stabilizer are fitted over the bone anchor. A rounded washer and nut having a corresponding rounded underside surface are fitted on to the bone anchor over the elongated member, and tightened. The configuration of the bone anchor assembly, including an intermediate portion of the bone anchor, the arcuate washer, and the nut, along with the configuration of the sliding support, allows multi-axial positioning of the bone anchor with respect to the elongated member at a plurality of locations along a slotted member.Type: GrantFiled: March 15, 2000Date of Patent: August 28, 2001Assignee: SDGI Holdings, Inc.Inventors: Matthew M. Morrison, B. Thomas Barker, John Stewart Young, Jeffrey W. Beale, Chris E. Johnson