Patents by Inventor Thomas A. Alheidt

Thomas A. Alheidt 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: 9962270
    Abstract: An expandable implant is disclosed in which the implant includes top and bottom plates having angled inner surfaces that interact with expansion members. The expansion members may be situated on an actuator, and may include at least one vertical projection. In some instances, rotation of the actuator in opposing directions about a longitudinal axis may cause the expansion members to move toward or away from one another, thereby resulting in separation of the top and bottom plates. During such expansion of the implant, the at least one vertical projection of the expansion members may be guided at least partially within a recess formed in the first or second plate. Pins may also be included with the expansion members that ride along respective slots in the plates during expansion. An insertion instrument for implanting the aforementioned implant, and methods of using the same, are also disclosed.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 8, 2018
    Assignee: Stryker European Holdings I, LLC
    Inventors: Thomas A. Alheidt, Bryan D. Milz, Dan Boljonis, Julien Doreau, Christine Herrmann
  • Publication number: 20180110628
    Abstract: An intervertebral implant may include an input for expanding at least two extendable support elements connected to a body at respective locations, such that the extendable support elements each apply a respective expansion force directed away from a surface of the body. Application of a single input force to the input may induce the extendable support elements to apply different amounts of expansion force. Alternatively or additionally, an intervertebral implant may include at least two portions connected together by a hinge for articulation about the hinge. In one aspect, the hinge may include at least two rigid links each pivotably connected to the two portions. In another aspect, a rigid link of the hinge may include a passageway for communicating a hydraulic fluid between the two portions. A locking system may be positionable into successive locked configurations by operation of a cam to prevent contraction of an extendable support element.
    Type: Application
    Filed: October 26, 2017
    Publication date: April 26, 2018
    Inventors: Amir Ali Sharifi-Mehr, Oliver Buchert, Ronald Litke, Thomas A. Alheidt
  • Patent number: 9867713
    Abstract: A prosthetic intervertebral spacer includes a body having a front end, a rear end, an anterior side, a posterior side, a top surface, and a bottom surface, and an arcuate interface extending away from the body and being connected to the rear end and the posterior side of the body. A method of inserting and positioning the spacer includes engaging a tool to the interface, inserting the spacer at least partially into the intervertebral disc space by moving the tool along an insertion direction, and allowing the spacer to rotate with respect to the insertion direction within the intervertebral disc space while continuing to move the tool along the insertion direction.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: January 16, 2018
    Assignee: Stryker European Holdings I, LLC
    Inventors: Bryan D. Milz, Christine Herrmann, Thomas A. Alheidt, Lee L. Thibodeau
  • Patent number: 9782271
    Abstract: A method of inserting an expandable intervertebral implant is disclosed. The implant preferably includes first and second members capable of being expanded upon movement of first and second wedges. The first and second wedges, while being capable of moving with respect to each other and the first and second members are also preferably attached to the first and second members. In addition, the first and second wedges are preferably capable of moving only in a first direction, while movement in a second direction is inhibited. The first and second wedges are also preferably prevented from torsionally moving with respect to the first and second members.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: October 10, 2017
    Assignee: Stryker European Holdings I, LLC
    Inventors: Robert Cipoletti, Thomas A. Alheidt
  • Publication number: 20170143382
    Abstract: A method for fusing vertebral bodies comprising the steps of: mounting a first engagement member of a fixation member to a pedicle of a first vertebra and a second engagement member of the spinal fixation member to a pedicle of a second vertebra, the first engagement member having a first extension engaged with an expansion ring, the second engagement member having a second extension engaged with the expansion ring; inserting screws through the first and second engagement members and into the pedicles of the respective first and second vertebrae; rotating the expansion ring in a first direction, thereby distracting the first and second vertebrae; implanting an intervertebral implant between the first and second vertebrae after rotating the expansion ring in the first direction; and rotating the expansion ring in a second direction after implanting the intervertebral implant, thereby compressing the first and second vertebrae.
    Type: Application
    Filed: February 8, 2017
    Publication date: May 25, 2017
    Inventors: Thomas A. Alheidt, Christine Herrmann, Bryan D. Milz
  • Patent number: 9597126
    Abstract: A method for fusing vertebral bodies comprising the steps of: mounting a first engagement member of a fixation member to a pedicle of a first vertebra and a second engagement member of the spinal fixation member to a pedicle of a second vertebra, the first engagement member having a first extension engaged with an expansion ring, the second engagement member having a second extension engaged with the expansion ring; inserting screws through the first and second engagement members and into the pedicles of the respective first and second vertebrae; rotating the expansion ring in a first direction, thereby distracting the first and second vertebrae; implanting an intervertebral implant between the first and second vertebrae after rotating the expansion ring in the first direction; and rotating the expansion ring in a second direction after implanting the intervertebral implant, thereby compressing the first and second vertebrae.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: March 21, 2017
    Assignee: Stryker European Holdings I, LLC
    Inventors: Thomas A. Alheidt, Christine Herrmann, Bryan D. Milz
  • Publication number: 20170056595
    Abstract: A flush syringe assembly comprises a barrel including a cylindrical side wall having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end having a passageway therethrough in fluid communication with the chamber. A plunger including an elongate body portion having a stopper at its distal end is provided. The stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for driving fluid out of the chamber through the passageway. The stopper includes a distal portion and a proximal portion separated by a spring element and configured to compress when fluid is being driven through the passageway by motion of the plunger and to continue to drive fluid through the passageway after motion of the plunger has stopped.
    Type: Application
    Filed: November 10, 2016
    Publication date: March 2, 2017
    Inventors: Thomas A. Alheidt, Anthony J. Kosinski
  • Patent number: 9549825
    Abstract: An insertion tool for positioning intervertebral spacers into disc spaces. The insertion tool has a proximal end and a distal end, a T-handle secured to the proximal end and a pair of alignment rails extending to the distal end. The insertion tool includes a handle secured to the proximal end of the guide rails, and a shaft that extends through the handle, whereby the shaft has a threaded portion that extends to the T-handle. The insertion tool also includes a blocker that is secured to the distal end of the shaft. The blocker includes stop arms that guide the blocker through the guide rails and toward the distal end of the shaft. The blocker may be provided in a plurality of different sizes corresponding to the sizes of the implants to be inserted into a disc space. A lock is provided for locking the implant to the shaft.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: January 24, 2017
    Assignee: Stryker European Holdings I, LLC
    Inventors: Bryan D. Milz, Robert Cipoletti, Thomas A. Alheidt
  • Publication number: 20170000619
    Abstract: A prosthetic intervertebral spacer is disclosed. The spacer preferably includes a body and an interface extending away from the body for use during implantation of the spacer. Methods of implanting the spacer and tools used during such procedure are also disclosed.
    Type: Application
    Filed: September 15, 2016
    Publication date: January 5, 2017
    Inventors: Bryan D. Milz, Christine Herrmann, Thomas A. Alheidt, Lee L. Thibodeau
  • Patent number: 9522237
    Abstract: A flush syringe assembly comprises a barrel including a cylindrical side wall having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end having a passageway therethrough in fluid communication with the chamber. A plunger including an elongate body portion having a stopper at its distal end is provided. The stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for driving fluid out of the chamber through the passageway. The stopper includes a distal portion and a proximal portion separated by a spring element and configured to compress when fluid is being driven through the passageway by motion of the plunger and to continue to drive fluid through the passageway after motion of the plunger has stopped.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: December 20, 2016
    Assignee: Becton, Dickinson and Company
    Inventors: Thomas Alheidt, Anthony J. Kosinski
  • Patent number: 9445914
    Abstract: A prosthetic intervertebral spacer is disclosed. The spacer preferably includes a body and an interface extending away from the body for use during implantation of the spacer. Methods of implanting the spacer and tools used during such procedure are also disclosed.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: September 20, 2016
    Assignee: Stryker European Holdings I, LLC
    Inventors: Bryan D. Milz, Christine Herrmann, Thomas A. Alheidt, Lee L. Thibodeau
  • Publication number: 20160213482
    Abstract: An expandable implant is disclosed in which the implant includes top and bottom plates having angled inner surfaces that interact with expansion members. The expansion members may be situated on an actuator, and may include at least one vertical projection. In some instances, rotation of the actuator in opposing directions about a longitudinal axis may cause the expansion members to move toward or away from one another, thereby resulting in separation of the top and bottom plates. During such expansion of the implant, the at least one vertical projection of the expansion members may be guided at least partially within a recess formed in the first or second plate. Pins may also be included with the expansion members that ride along respective slots in the plates during expansion. An insertion instrument for implanting the aforementioned implant, and methods of using the same, are also disclosed.
    Type: Application
    Filed: April 5, 2016
    Publication date: July 28, 2016
    Inventors: Thomas A. Alheidt, Bryan D. Milz, Dan Boljonis, Julien Doreau, Christine Herrmann
  • Patent number: 9333301
    Abstract: An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. An elongate plunger having a proximal end, a distal end and a stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and out of the chamber by movement of the stopper relative to the barrel. The plunger includes anti-reflux structure for minimizing stopper deflection when fluid has been delivered from the chamber and the stopper is being forced against the distal end of the chamber.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: May 10, 2016
    Assignee: Becton, Dickinson and Company
    Inventors: Thomas A. Alheidt, Tracy Ray Hottovy, James J. Timko
  • Patent number: 9320610
    Abstract: An expandable implant (210, 410) includes top and bottom plates (220, 250, 420, 450) having angled inner surfaces (222, 252, 422, 452) that interact with expansion members (300, 302, 500, 502). The expansion members (300, 302, 500, 502) may be situated on an actuator (280, 480), and may include at least one vertical projection (312, 314, 512, 514) for interacting with a recess (230, 430) in the plates (220, 250, 420, 450). In some instances, rotation of the actuator (280, 480) in opposing directions about a longitudinal axis may cause the expansion members (300, 302, 500, 502) to move toward or away from one another, thereby resulting in separation or collapse of the top and bottom plates (220, 250, 420, 450). Pins (316, 516) may also be associated with the expansion members (300, 302, 500, 502) and received in respective slots (318, 518) in the plates (220, 250, 420, 450).
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: April 26, 2016
    Assignee: Stryker European Holdings I, LLC
    Inventors: Thomas Alheidt, Bryan D. Milz, Dan Boljonis, Julien Doreau, Christine Herrmann
  • Publication number: 20160074073
    Abstract: A method for fusing vertebral bodies comprising the steps of: mounting a first engagement member of a fixation member to a pedicle of a first vertebra and a second engagement member of the spinal fixation member to a pedicle of a second vertebra, the first engagement member having a first extension engaged with an expansion ring, the second engagement member having a second extension engaged with the expansion ring; inserting screws through the first and second engagement members and into the pedicles of the respective first and second vertebrae; rotating the expansion ring in a first direction, thereby distracting the first and second vertebrae; implanting an intervertebral implant between the first and second vertebrae after rotating the expansion ring in the first direction; and rotating the expansion ring in a second direction after implanting the intervertebral implant, thereby compressing the first and second vertebrae.
    Type: Application
    Filed: November 23, 2015
    Publication date: March 17, 2016
    Inventors: Thomas A. Alheidt, Christine Herrmann, Bryan D. Milz
  • Patent number: 9220605
    Abstract: A spinal fixation device that includes a first engagement member. The first engagement member includes a first body and at least one extension. The first body includes a first aperture for receipt of a fastener. The at least one extension extends outwardly from the first body. Also included in the device, a second engagement member including a second body and a threaded extension that extends from the second body. The second body includes a second aperture for receipt of a fastener. Further, an expansion ring including a first end and a second end is included. The first end includes a threaded surface in threaded communication with the threaded extension. The second end is in rotatable communication with the at least one extension of the first engagement member. Where a torque is applied to the expansion ring, the second engagement member moves with respect to the first engagement member.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: December 29, 2015
    Assignee: Stryker Spine
    Inventors: Thomas A. Alheidt, Christine Herrmann, Bryan D. Milz
  • Publication number: 20150342755
    Abstract: An insertion tool for positioning intervertebral spacers into disc spaces. The insertion tool has a proximal end and a distal end, a T-handle secured to the proximal end and a pair of alignment rails extending to the distal end. The insertion tool includes a handle secured to the proximal end of the guide rails, and a shaft that extends through the handle, whereby the shaft has a threaded portion that extends to the T-handle. The insertion tool also includes a blocker that is secured to the distal end of the shaft. The blocker includes stop arms that guide the blocker through the guide rails and toward the distal end of the shaft. The blocker may be provided in a plurality of different sizes corresponding to the sizes of the implants to be inserted into a disc space. A lock is provided for locking the implant to the shaft.
    Type: Application
    Filed: August 6, 2015
    Publication date: December 3, 2015
    Inventors: Bryan D. Milz, Robert Cipoletti, Thomas A. Alheidt
  • Publication number: 20150258281
    Abstract: An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. An elongate plunger having a proximal end, a distal end and a flexible stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and out of the chamber by movement of the stopper relative to the barrel. The barrel includes anti-reflux structure for holding said stopper in a partially deflected position after fluid has been delivered from the chamber and the stopper is being force against the distal end of the chamber.
    Type: Application
    Filed: May 27, 2015
    Publication date: September 17, 2015
    Inventors: Thomas A. Alheidt, Tracy Ray Hottovy, Dustin Drake
  • Patent number: 9101494
    Abstract: An insertion tool for positioning intervertebral spacers into disc spaces. The insertion tool has a proximal end and a distal end, a T-handle secured to the proximal end and a pair of alignment rails extending to the distal end. The insertion tool includes a handle secured to the proximal end of the guide rails, and a shaft that extends through the handle, whereby the shaft has a threaded portion that extends to the T-handle. The insertion tool also includes a blocker that is secured to the distal end of the shaft. The blocker includes stop arms that guide the blocker through the guide rails and toward the distal end of the shaft. The blocker may be provided in a plurality of different sizes corresponding to the sizes of the implants to be inserted into a disc space. A lock is provided for locking the implant to the shaft.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: August 11, 2015
    Assignee: Stryker Spine
    Inventors: Bryan D. Milz, Robert Cipoletti, Thomas A. Alheidt
  • Patent number: 9072844
    Abstract: An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. An elongate plunger having a proximal end, a distal end and a flexible stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and out of the chamber by movement of the stopper relative to the barrel. The barrel includes anti-reflux structure for holding said stopper in a partially deflected position after has been delivered from the chamber and the stopper is being force against the distal end of the chamber.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: July 7, 2015
    Inventors: Thomas A. Alheidt, Tracy Ray Hottovy, Dustin Drake