Patents by Inventor Stuart L. Axelson, Jr.

Stuart L. Axelson, Jr. 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: 6620168
    Abstract: IM tibia revision tools include a trial stem extender having multiple notches which serve both as depth witness marks and holders for a stop clip, a collection of different sized tibial templates, each template adapted to receive an angular offset positioning guide, a collection of offset bushings, each bushing each bushing having a different offset distance and each being adapted to cooperate with the trial stem extender and the angular offset positioning guide, a neutral bushing for locating the position of the implant boss relative to the tibia and for reaming the tibia to accept the boss of the implant, a fin punch guide and fin punch for preparing the tibia to receive the keel of the tibial component, and a tool for translating the angular offset measurement to the tibial component. Tibial components according to the invention have three parts: the baseplate portion, the offset portion, and the stem portion.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: September 16, 2003
    Assignee: Stryker Technologies Corporation
    Inventors: Alan Lombardo, Stuart L. Axelson, Jr., James V. Bono, Kenneth A. Krackow
  • Patent number: 6595997
    Abstract: A method for aligning a resection guide relative to a patient's bone has applications during arthroplasty. An alignment guide is coupled to a patient's bone, to which there is coupled a resection guide. The resection guide is positioned along a transactional path and a plurality of rotational paths by manipulation of the alignment guide, thereby providing three degrees of freedom of manipulation over infinitely adjustable ranges.
    Type: Grant
    Filed: March 17, 2001
    Date of Patent: July 22, 2003
    Assignee: Howmedica Osteonics Corp.
    Inventors: Stuart L. Axelson, Jr., Jose Luis Moctezuma, Kenneth A. Krackow, Matthew P. Poggie
  • Patent number: 6558391
    Abstract: Femoral resection tools of the present invention include a posterior condyle alignment guide, an IM rod with an adjustable valgus bushing assembly, left and right external rotation plates, an anterior sizing boom having a stylus and a pair of medial/lateral drill guide assemblies (in one embodiment of the invention the drill guide assemblies are the combination of medial/lateral extension arms and attached (detachable) proximal positioning fixtures; in another embodiment, the proximal positioning fixtures are not part of the drill guide assembly per se), a plurality of self-tapping screws, proximal positioning fixtures (apart from any positioning fixtures that may be integrated into a drill guide assembly), and different size cutting guide blocks, each adapted to fit over the proximal positioning fixtures. Methods for utilizing the aforementioned tools so that five resections can be performed are also described.
    Type: Grant
    Filed: December 23, 2000
    Date of Patent: May 6, 2003
    Assignee: Stryker Technologies Corporation
    Inventors: Stuart L. Axelson, Jr., Michael J. McGovern, Reese K. Meyers
  • Patent number: 6258095
    Abstract: IM revision tools include reamers with depth markings or stops, an impactor-extractor with a coupling for attaching to tools which are inserted into and removed from the IM canal, a resection guide tower to which a cutting block is attached and which includes a notch which serves as both a witness mark and a holder for a femoral or tibial collar, a reversible clean-up cutting block with a quick-connect clamp attachable to the guide tower for resecting the distal femur and separate left and right clean-up cutting blocks for resecting the proximal tibia, a selection of spacer blocks for measuring the space between the tibia and femur to determine the size of the components to be installed, a multiple cut cutting guide for preparing the femur, a set of 5 and 10 mm trial wedges, a trial stem valgus adapter, femoral sizing indicators which include indications of anterior/posterior offset, a stabilizer box cutting template which is attachable to the multiple cut cutting guide, and anterior/posterior offset adapters
    Type: Grant
    Filed: March 28, 1998
    Date of Patent: July 10, 2001
    Assignee: Stryker Technologies Corporation
    Inventors: Alan Lombardo, Stuart L. Axelson, Jr., James V. Bono, Kenneth Krackow
  • Patent number: 6228091
    Abstract: IM tibia revision tools include a trial stem extender having multiple notches which serve both as depth witness marks and holders for a stop clip, a collection of different sized tibial templates, each template adapted to receive an angular offset positioning guide, a collection of offset bushings, each bushing each bushing having a different offset distance and each being adapted to cooperate with the trial stem extender and the angular offset positioning guide, a neutral bushing for locating the position of the implant boss relative to the tibia and for reaming the tibia to accept the boss of the implant, a fin punch guide and fin punch for preparing the tibia to receive the keel of the tibial component, and a tool for translating the angular offset measurement to the tibial component. Tibial components according to the invention have three parts: the baseplate portion, the offset portion, and the stem portion.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: May 8, 2001
    Assignee: Stryker Technologies Corporation
    Inventors: Alan Lombardo, Stuart L. Axelson, Jr., James V. Bono, Kenneth A. Krackow
  • Patent number: 6090114
    Abstract: An apparatus and method for tibial alignment which allows the independent establishment of two separate geometric planes to be used as a reference for the cutting of the tibial plateau during total knee arthroplasty. Two separate frame assemblies with extending rods are coupled to the tibia with a fixed relative angle between them, thereby allowing alignment with the mechanical axis of the bone. A cutting block is mounted on one of the assembly frames and is positioned against the tibia. Stabilizing pins are then placed in the cutting block, allowing the proper tibial plateau resection plane to be created.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: July 18, 2000
    Assignee: Stryker Howmedica Osteonics Corp.
    Inventors: Shigeo Matsuno, Carlos Esteban Collazo, Stuart L. Axelson, Jr., Michael Eric Gertner
  • Patent number: 6063091
    Abstract: IM tibia revision tools include a trial stem extender having multiple notches which serve both as depth witness marks and holders for a stop clip, a collection of different sized tibial templates, each template adapted to receive an angular offset positioning guide, a collection of offset bushings, each bushing each bushing having a different offset distance and each being adapted to cooperate with the trial stem extender and the angular offset positioning guide, a neutral bushing for locating the position of the implant boss relative to the tibia and for reaming the tibia to accept the boss of the implant, a fin punch guide and fin punch for preparing the tibia to receive the keel of the tibial component, and a tool for translating the angular offset measurement to the tibial component. Tibial components according to the invention have three parts: the baseplate portion, the offset portion, and the stem portion.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: May 16, 2000
    Assignee: Stryker Technologies Corporation
    Inventors: Alan Lombardo, Stuart L. Axelson, Jr., James V. Bono, Kenneth A. Krackow
  • Patent number: 5916219
    Abstract: An apparatus and method for tibial alignment which allows the independent establishment of two separate geometric planes to be used as a reference for the cutting of the tibial plateau during total knee arthroplasty. Two separate frame assemblies with telescoping rods are attached to the tibia with a fixed relative angle between them, thereby allowing alignment with the mechanical axis of the bone. A cutting block is mounted on one of the assembly frames and is positioned against the tibia. Stabilizing pins are then placed in the cutting block, allowing the proper tibial plateau resection plane to be created.
    Type: Grant
    Filed: February 10, 1997
    Date of Patent: June 29, 1999
    Inventors: Shigeo Matsuno, Carlos Esteban Collazo, Stuart L. Axelson, Jr., Michael Eric Gertner
  • Patent number: 5860980
    Abstract: An apparatus for use in total knee arthroplasty includes a tibia engaging plate which is coupled to an upstanding rack member, a drill bushing bracket coupled to the rack member by a lockable pinion member, and a femoral positioning jig which is rotatably coupled to the drill bushing bracket. The drill bushing bracket has a pair of spaced apart drill bushings which are dimensionally located to correspond in position to medial and lateral condyles of the femur. The centers of the drill bushings lie in a plane which is parallel to the plane in which the tibia engaging plate lies. The femoral positioning jig is provided with a pair of posterior skids, one for the lateral posterior condyle and one for the medial posterior condyle, a pair of holes for attaching the jig to the resected distal femur with spikes, and a pair of holes for receiving the two drill bushings. Two different femoral positioning jigs are provided, one for the right knee and one for the left knee.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: January 19, 1999
    Inventors: Stuart L. Axelson, Jr., James V. Bono, David J. Wartel
  • Patent number: 5658292
    Abstract: A method and apparatus for preparing a planar surface on the distal femur prior to implantation of a femoral knee prosthesis has a femoral plate with an opening therein for exposing both condyles of the femur. A guide with a central aperture is used to align the femoral plate on the distal femur. The guide is releasably secured to the femoral plate and an intramedullary guide rod is placed through the aperture therein and into the intramedullary canal of the femur. After alignment with the intramedullary canal, the femoral plate is pinned to the femur and the rod and guide are removed. A milling guide having two bores, one adjacent each condyle, is then placed on the femoral plate and an end mill is used to mill a planar surface on at least one of the condyles.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: August 19, 1997
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: Stuart L. Axelson, Jr.
  • Patent number: 5417695
    Abstract: A method and apparatus for preparing a planar surface on the distal femur prior to implantation of a femoral knee prosthesis has a femoral plate with an opening therein for exposing both condyles of the femur. A guide with a central aperture is used to align the femoral plate on the distal femur. The guide is releasably secured to the femoral plate and an intramedullary guide rod is placed through the aperture therein and into the intramedullary canal of the femur. After alignment with the intramedullary canal, the femoral plate is pinned to the femur and the rod and guide are removed. A milling guide having two bores, one adjacent each condyle, is then placed on the femoral plate and an end mill is used to mill a planar surface on at least one of the condyles.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: May 23, 1995
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventor: Stuart L. Axelson, Jr.