Patents by Inventor John F. Kopera

John F. Kopera 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).

  • Track tension control
    Patent number: 3930553
    Abstract: A known vehicle normally operating on independently suspended trailing arms nd pneumatic tires can be converted to a tracked vehicle by wrapping endless tracks around the tire tread areas in multiples of two. An expansible wheel-connector device is provided for causing the trailing arms and wheels to deflect in unison, thereby maintaining track tension and tire-track interengagement, minimizing uneven final drive torque loadings, and relieving the wheel bearing loads brought on by the addition of the track.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: January 6, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John F. Kopera, William E. Lawson, James P. Carr