Patents by Inventor David A. Bartell

David A. Bartell 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).

  • Publication number: 20260264180
    Abstract: A machine assembly for shaping a ball stud. The machine includes a shaping workstation that has at least one shaping tool for removing material from and shaping a preform. A finish workstation includes a finish spindle configured to couple to and rotate the preform about a finish axis of rotation relative to a finish cutting module and a burnishing module. The finish cutting module includes a finish cutting tool and an actuator configured to move an edge of the finish cutting tool into engagement with a ball of the preform. The burnishing module includes a hydrostatic quill configured to contact and burnish an exterior surface of the ball.
    Type: Application
    Filed: March 6, 2026
    Publication date: September 10, 2026
    Applicant: Federal Screw Works
    Inventors: Aaron J. ZurSchmiede, David A. Bartell, Christian Shane Bersano
  • Publication number: 20240416442
    Abstract: A machine for forming an axle shaft includes a plurality of stations and a conveyor for transferring an axle shaft preform in a horizontal orientation between the plurality of stations. The plurality of stations includes a first hobbing station that has a hobbing unit and a holding unit. The holding unit includes a rotator for rotating the axle shaft preform and the hobbing unit includes a cutting tool and a linkage that is configured to articulate the cutting tool vertically to engage the axle shaft preform and horizontally to define a length and depth of a removed material. The rotator is configured to rotate the axle shaft preform between each articulation of the cutting tool.
    Type: Application
    Filed: June 16, 2023
    Publication date: December 19, 2024
    Applicant: Federal Screw Works
    Inventors: Aaron J. ZurSchmiede, David A. Bartell