Patents by Inventor Thomas Purcell

Thomas Purcell 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: 11654030
    Abstract: Disclosed is a standalone anterior lumbar interbody spacer that includes a lumbar spacer body and lumbar plate with a unique locking system to rigidly couple the spacer body and plate via a spring loaded lock tab.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: May 23, 2023
    Assignee: Astura Medical Inc.
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20230149051
    Abstract: A crosslink mechanism features a locking clip with interlocking teeth. When being deployed, the surgeon will compress the spring loaded clips, freeing rotation on both sides of the mechanism. Once clipped onto the sequential reducers, the surgeon releases the clips allowing the spring to lock the teeth and therefore lock rotational freedom out of the mechanism.
    Type: Application
    Filed: November 17, 2022
    Publication date: May 18, 2023
    Applicant: Astura Medical Inc.
    Inventors: Ross Dusterhoft, Thomas Purcell
  • Publication number: 20230149054
    Abstract: An En Bloc connector configured to couple with multiple sequential reducers or extenders, such as spinal screw reducers, to correct a rotation deformity of the spine by turning or rotating the deformed spine structure toward a normal position. In the embodiments shown, the En Bloc connector holds three sequential reducers in the retracted configuration and four sequential reducers in the extended configuration.
    Type: Application
    Filed: November 17, 2022
    Publication date: May 18, 2023
    Applicant: Astura Medical Inc.
    Inventors: Ross Dusterhoft, Thomas Purcell
  • Publication number: 20230143005
    Abstract: The present invention is directed to a rod reducer that is both a lateral rod reducer and an axial rod reducer that uses an entirely different mechanism never before used for lateral rod reduction. The lateral rod reducer is configured to move a spinal fixation rod that is not aligned with the pedicle screw to a position above the tulip slot or U-shaped channel. Once in position, the lateral rod reducer also provides an axial rod reducer to advance the spinal fixation rod axially into the tulip slot. Splitting the reducer body geometry to create a hinged jaw that is then driven by a linkage system is novel. The lateral rod reducer of the present invention allows for incremental lateral reduction that utilizes a threaded linkage feature for increased power/mechanical advantage when laterally reducing. This will allow for new techniques of lateral rod manipulation in deformity cases.
    Type: Application
    Filed: November 4, 2022
    Publication date: May 11, 2023
    Applicant: Astura Medical Inc.
    Inventors: Ross Dusterhoft, Thomas Purcell
  • Patent number: 11638650
    Abstract: A standalone anterior cervical interbody spacer (ACIF) that includes a spacer body and plate rigidly couple via flexible pins.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: May 2, 2023
    Assignee: ASTURA MEDICAL INC
    Inventors: Anthony Valkoun, Thomas Purcell
  • Patent number: 11633290
    Abstract: A fastener retention system for a standalone interbody spacer that includes flexible members to configure to rotate from an “unlocked to a “locked” state to cover the screw holes in the interbody space to prevent bone engagement fasteners from backing out.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: April 25, 2023
    Assignee: ASTURA MEDICAL INC
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20220395381
    Abstract: An expandable interbody spacer for placement between adjacent vertebrae having two or more upper and lower endplates and lateral expansion wedges configured to couple a drive means to expand both a height and a width of the expandable interbody spacer from a collapsed state to an expanded state.
    Type: Application
    Filed: June 15, 2022
    Publication date: December 15, 2022
    Applicant: Astura Medical Inc.
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20220387190
    Abstract: An expandable interbody spacer that is delivered in the anterior approach with adjustable height and end plate angulation (lordosis). The expandable interbody spacer is configured to have an initial collapsed state having a first height suitable for being inserted into an intervertebral space defined by a pair of adjacent vertebrae, and an expanded state having a second height that is greater than the first height. The expandable interbody spacer may be expanded from the initial collapsed state to the expanded state in-situ. The expanded state increases the distance between the adjacent vertebrae and provides support to the adjacent vertebrae while bone fusion occurs and also provides rigid support between the adjacent vertebrae that withstands compressive forces.
    Type: Application
    Filed: June 3, 2022
    Publication date: December 8, 2022
    Applicant: Astura Medical Inc.
    Inventors: Keith Klausman, Thomas Purcell
  • Publication number: 20220378488
    Abstract: A stylet screw driver assembly having a screw driver/ratcheting handle assembly which houses a stylet, pre-assembled to a set length based on the screw length in use, fixed in place by a spring loaded button mechanism located on the proximal end of the ratcheting handle. The spring loaded button mates with the stylet assembly, providing various stylet protrusion lengths.
    Type: Application
    Filed: August 8, 2022
    Publication date: December 1, 2022
    Applicant: Astura Medical Inc.
    Inventors: Keith Klausman, Thomas Purcell, Anthony Valkoun
  • Publication number: 20220354478
    Abstract: A tissue retractor having a spring loaded retractor blade that provides constant downward pressure on the spine to eliminate/reduce tissue from creeping underneath the tips of the blades during use, which decreases operation time and reduces patient risk.
    Type: Application
    Filed: May 7, 2022
    Publication date: November 10, 2022
    Applicant: Astura Medical Inc.
    Inventors: Keith Klausman, Joel Gambrell, Thomas Purcell
  • Patent number: 11458026
    Abstract: A derotation reducer linkage with polyaxial locking connector for use with screw reducers/extenders in spinal fusion surgery.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: October 4, 2022
    Assignee: ASTURA MEDICAL INC
    Inventors: Thomas Purcell, Eric Quaal, Anthony Valkoun
  • Publication number: 20220296281
    Abstract: A pivotal bone anchor assembly includes a body member with upright arms defining a channel for receiving a fixation rod, an axial bore having a bottom opening, a lower interior surface disposed about the bottom opening, and a downwardly facing recessed surface above the lower interior surface. The assembly also includes a shank comprising a partial spherical head positionable into the axial bore and an anchor portion for attachment to the bone. The assembly further includes a bushing insertable into the axial bore having an outer surface configured to resiliently snap under the downwardly facing surface so as to inhibit the bushing from moving upward in the axial bore, and a lower surface configured for biased engagement with the partial spherical head of the bone anchor, with the biased engagement providing a pre-lock press fitment about the partial spherical head so that the bone anchor and body member do not move freely with respect to each other prior to insert and securement of the fixation rod.
    Type: Application
    Filed: June 7, 2022
    Publication date: September 22, 2022
    Applicant: Alphatec Spine, Inc.
    Inventors: Thomas Purcell, Don Hair, Tamas T. Frech
  • Patent number: 11389207
    Abstract: A spinal screw assembly includes a bone screw having a head with a rounded outer surface and an anchor portion for fixation to the bone. The assembly also includes a body member defining an internal cavity communicating with a bottom surface of the body member through a lower opening, with an interior surface adjacent the lower opening configured to engage the rounded outer surface of the head of the screw, and an upper portion defining a channel for receiving a fixation rod. The screw head is configured for uploading into the cavity of the body member through the bottom opening until the rounded outer surface enters into pivotal engagement with the interior surface of the internal cavity, with the screw extending downwardly through the lower opening, so as to allow for variable angular movement of the bone screw relative to the body member prior to locking the spinal screw assembly with a closure.
    Type: Grant
    Filed: June 18, 2021
    Date of Patent: July 19, 2022
    Assignee: Alphatec Spine, Inc.
    Inventors: Thomas Purcell, Don Hair, Tamas T. Frech
  • Publication number: 20220125596
    Abstract: An expandable interbody spacer for placement between adjacent vertebrae having two or more upper and lower endplates having compound-angle linear rods coupled to compound-angle bores configured to couple with the compound-angle linear rods a drive means having corresponding compound-angle slots, ramps or rails configured to slidingly engage the compound-angle slots, ramps or rails of the two or more upper and lower endplates, wherein movement of the drive means in a first direction moves the two or more upper and lower endplates away from each other both vertically and horizontally to expand both a height and a width of the expandable interbody spacer from a collapsed state to an expanded state.
    Type: Application
    Filed: October 28, 2021
    Publication date: April 28, 2022
    Applicant: Astura Medical Inc.
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20220096246
    Abstract: A fastener retention system for a standalone interbody spacer that includes flexible members to configure to rotate from an “unlocked to a “locked” state to cover the screw holes in the interbody space to prevent bone engagement fasteners from backing out.
    Type: Application
    Filed: September 30, 2021
    Publication date: March 31, 2022
    Applicant: Astura Medical Inc.
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20210369466
    Abstract: Disclosed is a standalone anterior lumbar interbody spacer that includes a lumbar spacer body and lumbar plate with a unique locking system to rigidly couple the spacer body and plate via a spring loaded lock tab.
    Type: Application
    Filed: September 24, 2020
    Publication date: December 2, 2021
    Applicant: Astura Medical Inc.
    Inventors: Anthony Valkoun, Thomas Purcell
  • Publication number: 20210307789
    Abstract: A spinal screw assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion and a tool engagement surface in the head portion for use in driving the screw into a vertebrae. The head portion of the screw is positioned in a body member adjacent a curvilinear surface disposed about an aperture in the end of the body member such that the shaft portion of the screw extends therethrough and the curvilinear inner surface abuts and mates with the head portion of the screw so as to define a ball joint therewith. The body member additionally defines a pair of opposed parallel slots therein adapted to receive a portion of the fixation rod and a locking cap bears against the fixation rod to releasably secure the rod within the assembly.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 7, 2021
    Applicant: Alphatec Spine, Inc.
    Inventors: Thomas Purcell, Don Hair, Tamas T. Frech
  • Publication number: 20210251770
    Abstract: An expandable cage for placement between adjacent vertebrae having two or more upper and lower end plates having compound-angled slots, ramps or rails, and a drive means having corresponding compound-angled slots, ramps or rails configured to slidingly engage the compound-angled slots, ramps or rails of the two or more upper and lower end plates, wherein movement of the drive means in a first direction moves the two or more upper and lower end plates away from each other both vertically and horizontally to expand both a height and a width of the expandable cage from a collapsed state to an expanded state.
    Type: Application
    Filed: April 20, 2021
    Publication date: August 19, 2021
    Applicant: Astura Medical Inc.
    Inventors: Thomas Purcell, Greg Martin
  • Patent number: 11039861
    Abstract: A pivotal bone anchor assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion, and a tool engagement surface in the head portion for use in driving the screw into a vertebra. The head portion of the screw is positioned in a body member adjacent an interior surface disposed about a bottom opening of the body member such that the shaft portion of the screw extends therethrough and the head portion engages the interior surface so as to provide for pivotal motion between the body member and the pedicle screw. The bone anchor also includes a bushing insertable into the body member and having an outwardly projecting structure that snaps under a downward facing abutment surface to maintain the bushing within the body member.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: June 22, 2021
    Assignee: Alphatec Spine, Inc.
    Inventors: Thomas Purcell, Don Hair, Tamas T. Frech
  • Patent number: 10980644
    Abstract: An expandable cage for placement between adjacent vertebrae having two or more upper and lower end plates having compound-angled slots, ramps or rails, and a drive means having corresponding compound-angled slots, ramps or rails configured to slidingly engage the compound-angled slots, ramps or rails of the two or more upper and lower end plates, wherein movement of the drive means in a first direction moves the two or more upper and lower end plates away from each other both vertically and horizontally to expand both a height and a width of the expandable cage from a collapsed state to an expanded state.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: April 20, 2021
    Assignee: Astura Medical Inc
    Inventors: Thomas Purcell, Greg Martin