Patents by Inventor Jon Robert Pratt

Jon Robert Pratt 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).

  • Absolute mass balance
    Patent number: 11187571
    Abstract: An absolute mass balance determines an absolute mass of an object and includes: a dual diameter wheel including: a balance fulcrum; and a balance beam disposed on the balance fulcrum and including: a main mass arm and a counter mass arm; a main mass receiver that receives the object; a main magnet system including: a first main coil that produces a first magnetic field; a second main coil that produces a second magnetic field; and a permanent magnet that produces a third magnetic field that interacts with the first magnetic field and the second magnetic field; a displacement measuring system that provides a null position of the dual diameter wheel and measures a velocity of the main magnet system; and a driving motor including: an eddy current damper that provides a constant velocity of the main mass receiver; and a counter mass magnet system.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: November 30, 2021
    Assignee: GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
    Inventors: Leon Shih Chao, Jon Robert Pratt
  • ABSOLUTE MASS BALANCE
    Publication number: 20200182682
    Abstract: An absolute mass balance determines an absolute mass of an object and includes: a dual diameter wheel including: a balance fulcrum; and a balance beam disposed on the balance fulcrum and including: a main mass arm and a counter mass arm; a main mass receiver that receives the object; a main magnet system including: a first main coil that produces a first magnetic field; a second main coil that produces a second magnetic field; and a permanent magnet that produces a third magnetic field that interacts with the first magnetic field and the second magnetic field; a displacement measuring system that provides a null position of the dual diameter wheel and measures a velocity of the main magnet system; and a driving motor including: an eddy current damper that provides a constant velocity of the main mass receiver; and a counter mass magnet system.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 11, 2020
    Inventors: Leon Shih Chao, Jon Robert Pratt