Patents by Inventor Andrew J. Nelson

Andrew J. Nelson 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: 12376965
    Abstract: Disclosed herein is a humeral head trial, a system for humeral trialing, and a method for removing a humeral head trial from a humeral stem. The humeral head trial may include a first portion, a second portion, and a post extending from the second portion. The first portion may define a convex articular surface with a movable surface substantially flush with the convex articular surface. The post may define a first length in a first configuration and a second length in a second configuration. The first length may be greater than the second length. The post may change from the first configuration to the second configuration by moving the movable surface with respect to the convex articular surface.
    Type: Grant
    Filed: May 22, 2023
    Date of Patent: August 5, 2025
    Assignee: Howmedica Osteonics Corp.
    Inventor: Andrew J. Nelson
  • Patent number: 12357328
    Abstract: A resection guide includes an anchor having bone anchoring features, a cutting block having a cutting guide defined therein, and a linkage flexibly connecting the cutting block to the anchor. The flexibility of the linkage provides the cutting block with six degrees of freedom of motion relative to the anchor.
    Type: Grant
    Filed: May 17, 2023
    Date of Patent: July 15, 2025
    Assignee: Howmedica Osteonics Corp.
    Inventors: Andrew J. Nelson, Daniel E. Sapio, Sunny Shorabh, Shashank Verma, Morgan Schliem
  • Patent number: 12268610
    Abstract: A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The base may include a proximal collar having a proximal surface and a bone-engaging surface opposite the proximal surface. The collar may have a superior portion and an inferior portion, the superior portion defining an arc shape and the inferior portion defining a substantially triangular shape.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: April 8, 2025
    Assignee: Howmedica Osteonics Corp.
    Inventors: Daniel E. Sapio, Ashish Mehta, Andrew J. Nelson, Bernhard Hofstaetter, Sunny Shorabh
  • Publication number: 20250090337
    Abstract: A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.
    Type: Application
    Filed: December 3, 2024
    Publication date: March 20, 2025
    Applicant: Howmedica Osteonics Corp.
    Inventors: Philip T. Kemp, Andrew J. Nelson, Jan Heinsohn, Rajan Yadav, Koustubh Rao, Gennaro A. Barile, Ashish Mehta, Venkateswaran Perumal, David Viscardi
  • Patent number: 12193942
    Abstract: A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: January 14, 2025
    Assignee: HOWMEDICA OSTEONICS CORP.
    Inventors: Philip T. Kemp, Andrew J. Nelson, Jan Heinsohn, Rajan Yadav, Koustubh Rao, Gennaro A. Barile, Ashish Mehta, Venkateswaran Perumal, David Viscardi
  • Publication number: 20240367837
    Abstract: A product transfer apparatus for transferring product between a horizontal form, fill, and seal machine and a cartoner machine is provided. The product transfer apparatus includes an electromagnetic motor table configured to define a plurality of pre-selected zones and a plurality of moving elements configured to float over a surface of the electromagnetic motor table and move between one or more of the pre-selected zones. The product transfer apparatus further includes a product delivery device configured to deposit one or more products in a pre-selected common orientation, relative to a longitudinal axis of the product transfer apparatus, onto one or more moving elements of the plurality of moving elements, respectively, at a first pre-selected zone of the plurality of pre-selected zones such that each of the one or more moving elements receives a single product from the product delivery device in the pre-selected common orientation at the first pre-selected zone.
    Type: Application
    Filed: May 2, 2024
    Publication date: November 7, 2024
    Inventors: Jeffrey D. Wintring, Robert M. Kalany, Andrew J. Nelson, Jeffrey E. Farmer
  • Publication number: 20240341979
    Abstract: An impactor system is for impacting a base of a shoulder implant into a humerus. The system may include a housing having distal stabilizer configured to contact a proximal resected surface of the humerus. The distal stabilizer may define an open space. An impaction member may be slidably received within the housing. The impaction member may have a proximal surface and a distal connection mechanism adapted to connect to the base of the shoulder implant. The impaction member may be movable from a first proximal position in which the base of the shoulder implant, when connected to the impaction member, is positioned within the open space defined by the distal stabilizer, to a second distal position in which the base of the shoulder implant, when connected to the impaction member, is positioned at least partially distal to the open space defined by the distal stabilizer.
    Type: Application
    Filed: April 10, 2024
    Publication date: October 17, 2024
    Inventors: Daniel E. Sapio, Andrew J. Nelson, Gennaro A. Barile, Sunny Shorabh
  • Publication number: 20240341966
    Abstract: A method of repairing a fractured bone may include implanting a prosthetic stem into an intramedullary canal of the fractured bone. First and second bone segments of the fractured bone may be robotically machined to include first and second implant-facing surfaces that are substantially negatives of first and second surface portions of the first end of the prosthetic stem. The first and second tuberosities may be machined so that the first and second bone segments have first and second interlocking surfaces shaped to interlock with each other. During implantation, the first and second implant-facing surfaces are in contact with the first and second surface portions of the first end of the prosthetic stem, and the first interlocking surface interlocks with the second interlocking surface.
    Type: Application
    Filed: April 9, 2024
    Publication date: October 17, 2024
    Inventors: Rajan Yadav, Koustubh Rao, Andrew J. Nelson, David Viscardi, Jetinder Singh
  • Patent number: 11986401
    Abstract: An impactor system is for impacting a base of a shoulder implant into a humerus. The system may include a housing having distal stabilizer configured to contact a proximal resected surface of the humerus. The distal stabilizer may define an open space. An impaction member may be slidably received within the housing. The impaction member may have a proximal surface and a distal connection mechanism adapted to connect to the base of the shoulder implant. The impaction member may be movable from a first proximal position in which the base of the shoulder implant, when connected to the impaction member, is positioned within the open space defined by the distal stabilizer, to a second distal position in which the base of the shoulder implant, when connected to the impaction member, is positioned at least partially distal to the open space defined by the distal stabilizer.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: May 21, 2024
    Assignee: Howmedica Osteonics Corp.
    Inventors: Daniel E. Sapio, Andrew J. Nelson, Gennaro A. Barile, Sunny Shorabh
  • Patent number: 11980549
    Abstract: A method of repairing a fractured bone may include implanting a prosthetic stem into an intramedullary canal of the fractured bone. First and second bone segments of the fractured bone may be robotically machined to include first and second implant-facing surfaces that are substantially negatives of first and second surface portions of the first end of the prosthetic stem. The first and second tuberosities may be machined so that the first and second bone segments have first and second interlocking surfaces shaped to interlock with each other. During implantation, the first and second implant-facing surfaces are in contact with the first and second surface portions of the first end of the prosthetic stem, and the first interlocking surface interlocks with the second interlocking surface.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: May 14, 2024
    Assignee: Howmedica Osteonics Corp.
    Inventors: Rajan Yadav, Koustubh Rao, Andrew J. Nelson, David Viscardi, Jetinder Singh
  • Publication number: 20240115294
    Abstract: An external fixation system may include first and second fixation rings and a plurality of adjustable length struts. Each adjustable length strut may have two joints, a rod, a tube, and an actuator configured to drive the rod axially relative to the tube to change an effective length of the strut. The system may include a plurality of controller modules each configured to couple to a corresponding strut. The external fixation system may have a manual mode of operation in which the controller modules are not coupled to the struts, and manual actuation of the actuators changes the effective lengths of the struts in discrete length increments. The external fixation system may have an automated mode of operation in which the controller modules are coupled to the struts, and automated actuation of the actuators changes the effective lengths of the struts in infinitesimally small length increments.
    Type: Application
    Filed: December 19, 2023
    Publication date: April 11, 2024
    Applicant: Stryker European Operations Limited
    Inventors: Chulho Pak, Subash K. Mannanal, Peter Sterrantino, Noah Roberson, Anup Kumar, Andrew J. Nelson
  • Patent number: 11896267
    Abstract: An external fixation system may include first and second fixation rings and a plurality of adjustable length struts. Each adjustable length strut may have two joints, a rod, a tube, and an actuator configured to drive the rod axially relative to the tube to change an effective length of the strut. The system may include a plurality of controller modules each configured to couple to a corresponding strut. The external fixation system may have a manual mode of operation in which the controller modules are not coupled to the struts, and manual actuation of the actuators changes the effective lengths of the struts in discrete length increments. The external fixation system may have an automated mode of operation in which the controller modules are coupled to the struts, and automated actuation of the actuators changes the effective lengths of the struts in infinitesimally small length increments.
    Type: Grant
    Filed: January 27, 2023
    Date of Patent: February 13, 2024
    Assignee: Stryker European Operations Limited
    Inventors: Chulho Pak, Subash K. Mannanal, Peter Sterrantino, Noah Roberson, Anup Kumar, Andrew J. Nelson
  • Patent number: 11833056
    Abstract: A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: December 5, 2023
    Assignee: Howmedica Osteonics Corp.
    Inventors: Philip T. Kemp, Andrew J. Nelson, Jan Heinsohn, Rajan Yadav, Koustubh Rao, Gennaro A. Barile, Ashish Mehta, Venkateswaran Perumal, David Viscardi
  • Publication number: 20230363921
    Abstract: Disclosed herein is a humeral head trial, a system for humeral trialing, and a method for removing a humeral head trial from a humeral stem. The humeral head trial may include a first portion, a second portion, and a post extending from the second portion. The first portion may define a convex articular surface with a movable surface substantially flush with the convex articular surface. The post may define a first length in a first configuration and a second length in a second configuration. The first length may be greater than the second length. The post may change from the first configuration to the second configuration by moving the movable surface with respect to the convex articular surface.
    Type: Application
    Filed: May 22, 2023
    Publication date: November 16, 2023
    Applicant: Howmedica Osteonics Corp.
    Inventor: Andrew J. Nelson
  • Publication number: 20230285037
    Abstract: A resection guide includes an anchor having bone anchoring features, a cutting block having a cutting guide defined therein, and a linkage flexibly connecting the cutting block to the anchor. The flexibility of the linkage provides the cutting block with six degrees of freedom of motion relative to the anchor.
    Type: Application
    Filed: May 17, 2023
    Publication date: September 14, 2023
    Inventors: Andrew J. Nelson, Daniel E. Sapio, Sunny Shorabh, Shashank Verma, Morgan Schliem
  • Publication number: 20230255665
    Abstract: An external fixation system may include first and second fixation rings and a plurality of adjustable length struts. Each adjustable length strut may have two joints, a rod, a tube, and an actuator configured to drive the rod axially relative to the tube to change an effective length of the strut. The system may include a plurality of controller modules each configured to couple to a corresponding strut. The external fixation system may have a manual mode of operation in which the controller modules are not coupled to the struts, and manual actuation the actuators changes the effective lengths of the struts in discrete length increments. The external fixation may have an automated mode of operation in which the controller modules are coupled to the struts, and automated actuation of the actuators changes the effective lengths of the struts in infinitesimally small length increments.
    Type: Application
    Filed: January 27, 2023
    Publication date: August 17, 2023
    Applicant: Stryker European Operations Limited
    Inventors: Chulho Pak, Subash K. Mannanal, Peter Sterrantino, Noah Roberson, Anup Kumar, Andrew J. Nelson
  • Patent number: 11684377
    Abstract: A resection guide includes an anchor having bone anchoring features, a cutting block having a cutting guide defined therein, and a linkage flexibly connecting the cutting block to the anchor. The flexibility of the linkage provides the cutting block with six degrees of freedom of motion relative to the anchor.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: June 27, 2023
    Assignee: Howmedica Osteonics Corp.
    Inventors: Andrew J. Nelson, Daniel E. Sapio, Sunny Shorabh, Shashank Verma, Morgan Schliem
  • Patent number: 11678993
    Abstract: Disclosed herein is a humeral head trial, a system for humeral trialing, and a method for removing a humeral head trial from a humeral stem. The humeral head trial may include a first portion, a second portion, and a post extending from the second portion. The first portion may define a convex articular surface with a movable surface substantially flush with the convex articular surface. The post may define a first length in a first configuration and a second length in a second configuration. The first length may be greater than the second length. The post may change from the first configuration to the second configuration by moving the movable surface with respect to the convex articular surface.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: June 20, 2023
    Assignee: Howmedica Osteonics Corp.
    Inventor: Andrew J. Nelson
  • Publication number: 20230149176
    Abstract: According to one aspect of the disclosure, a prosthetic implant system includes a first articulation component, a base, and a second anchor. The base may have a proximal portion and a first anchor extending in a distal direction along a longitudinal first anchor axis. The proximal portion of the base may be configured to couple to the first articulation component. The second anchor may be formed separately from the base and may extend along a longitudinal second anchor axis. The base may include a channel extending from a first opening in the proximal portion of the base through a second opening in a distal portion of the first anchor. The channel may be sized and shaped to receive the second anchor therethrough. When the second anchor is received within the channel, the longitudinal first anchor axis may be oblique to the longitudinal second anchor axis.
    Type: Application
    Filed: November 14, 2022
    Publication date: May 18, 2023
    Inventors: Sunny Shorabh, Vishal Dilip Jagtap, Andrew J. Nelson, Rajan Yadav
  • Publication number: 20230112855
    Abstract: Described herein are cannulated reamer designs and methods. In one embodiment, a reamer comprises a cannulated central body portion, a plurality of cutting legs and outer frame. The cannulated central body portion has an inner wall surface and an opposing outer wall surface defining a thickness and a bone contacting surface and an opposing distal end surface defining a length, the inner wall surface defining a bore about a central longitudinal axis of the cannulated central body portion. The plurality of cutting legs extends outwardly from the cannulated central body portion. The other defines a periphery of the reamer, the outer frame coupled to a lateral end of each of the plurality of cutting legs. The cannulated central body portion has a recess extending entirely through the thickness and only partially though the length.
    Type: Application
    Filed: December 14, 2022
    Publication date: April 13, 2023
    Inventors: Nicholas Olson, Andrew J. Nelson