Patents by Inventor John Rappolt

John Rappolt 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).

  • PASSIVELY DAMPED END FITTINGS AND BRACKETS
    Publication number: 20250091736
    Abstract: A passively damped mechanical system is disclosed, for example for use in aerospace applications where vibration can adversely affect navigational and operational instruments. In one example, the passively damped mechanical system includes an end fitting of a strut used to connect a structural element to a payload. The end fitting may include outer and inner cylindrical hubs, with a space between the outer and inner cylindrical hub at least partially filled with a viscoelastic material. In a further example, the passively damped mechanical system includes legs used to connect a structural element to a bracket configured to support a payload. Each leg may include a hollow interior having a lattice structure to add strength and a viscoelastic material to provide passive damping.
    Type: Application
    Filed: December 5, 2024
    Publication date: March 20, 2025
    Applicant: MAXAR SPACE LLC
    Inventors: Michael Freestone, Brian M. Cayton, John Rappolt, Shane Abraham Seiwerts, Daniel Fluitt, Kevin Ziemann
  • Passively damped end fittings and brackets
    Patent number: 12162631
    Abstract: A passively damped mechanical system is disclosed, for example for use in aerospace applications where vibration can adversely affect navigational and operational instruments. In one example, the passively damped mechanical system includes an end fitting of a strut used to connect a structural element to a payload. The end fitting may include outer and inner cylindrical hubs, with a space between the outer and inner cylindrical hub at least partially filled with a viscoelastic material. In a further example, the passively damped mechanical system includes legs used to connect a structural element to a bracket configured to support a payload. Each leg may include a hollow interior having a lattice structure to add strength and a viscoelastic material to provide passive damping.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: December 10, 2024
    Assignee: Maxar Space LLC
    Inventors: Michael Freestone, Brian M. Cayton, John Rappolt, Shane Abraham Seiwerts, Daniel Fluitt, Kevin Ziemann
  • PASSIVELY DAMPED END FITTINGS AND BRACKETS
    Publication number: 20220194636
    Abstract: A passively damped mechanical system is disclosed, for example for use in aerospace applications where vibration can adversely affect navigational and operational instruments. In one example, the passively damped mechanical system includes an end fitting of a strut used to connect a structural element to a payload. The end fitting may include outer and inner cylindrical hubs, with a space between the outer and inner cylindrical hub at least partially filled with a viscoelastic material. In a further example, the passively damped mechanical system includes legs used to connect a structural element to a bracket configured to support a payload. Each leg may include a hollow interior having a lattice structure to add strength and a viscoelastic material to provide passive damping.
    Type: Application
    Filed: December 17, 2020
    Publication date: June 23, 2022
    Applicant: MAXAR SPACE LLC
    Inventors: Michael Freestone, Brian M. Cayton, John Rappolt, Shane Abraham Seiwerts, Daniel Fluitt, Kevin Ziemann