Patents by Inventor Dennis J. Buchanan
Dennis J. Buchanan 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: 8529604Abstract: 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: April 13, 2010Date of Patent: September 10, 2013Assignee: Warsaw Orthopedic, Inc.Inventors: B Thomas Barker, Jr., John Stewart Young, Craig M Squires, David L Brumfield, Christopher E Johnson, Dennis J Buchanan
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Patent number: 8298274Abstract: 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: November 24, 2010Date of Patent: October 30, 2012Assignee: Warsaw Orthopedic, Inc.Inventors: Thomas B Barker, Jr., John Stewart Young, Craig M Squires, David L Brumfield, Christopher E Johnson, Dennis J Buchanan
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Publication number: 20110071577Abstract: 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: November 24, 2010Publication date: March 24, 2011Applicant: WARSAW ORTHOPEDIC, INC.Inventors: B. Thomas Barker, JR., John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Publication number: 20100198270Abstract: 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: April 13, 2010Publication date: August 5, 2010Applicant: WARSAW ORTHOPEDIC, INC.Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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Patent number: 7727261Abstract: 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: December 9, 2003Date of Patent: June 1, 2010Inventors: B. Thomas Barker, John Stewart Young, Craig Squires, David Brumfield, Chris Johnson, Dennis J. Buchanan
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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: 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: 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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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: 6013103Abstract: A knee prosthesis for replacing at least a portion of a knee joint between the distal end of a femur and the proximal end of a tibia.Type: GrantFiled: November 26, 1997Date of Patent: January 11, 2000Assignee: Wright Medical Technology, Inc.Inventors: Michael E. Kaufman, Kevin B. Hayes, Dennis J. Buchanan, Robert D. Paxson, Irina A. Timmerman, Stephen E. White
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Patent number: 5964808Abstract: A knee prosthesis including a tibial component for mounting to the proximal end of a tibia, and a femoral component for mounting to the distal end of a femur. At least the face surface of the medial condylar portion of the femoral component may be preferably substantially congruent with the face surface of a medial cavity in the upper surface of the tibial component so that substantially complete surface-to-surface contact between the face surface of the medial cavity in the upper surface of the tibial component and the face surface of the medial condylar portion of the femoral component is provided throughout a significant portion of the range of flexion of the knee joint.Type: GrantFiled: July 11, 1996Date of Patent: October 12, 1999Assignee: Wright Medical Technology, Inc.Inventors: J. David Blaha, Stephen E. White, Robert D. Paxson, Dennis J. Buchanan
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Patent number: 5364401Abstract: An article for preparing a bone to receive a distal implant includes a base having longitudinal axis, a support surface thereon, and seating surfaces for seating the base along a long axis of the bone. A pair of connected brackets are mounted on the base. A first of the brackets is axially adjustable relative to the longitudinal axis of the base and a second bracket is radially adjustable relative to the base. One of the brackets is operatively connected to the support surface and the other of the brackets includes a single point connecting mechanism for connecting a plurality of bone preparing devices to the base at a single point reference axially and radially adjustable relative to the base.Type: GrantFiled: October 8, 1992Date of Patent: November 15, 1994Assignee: Wright Medical Technology, Inc.Inventors: Joseph M. Ferrante, Dennis J. Buchanan