Patents by Inventor John J. Navar

John J. Navar 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).

  • Obstacle clearing device for wheels
    Patent number: 5170528
    Abstract: An obstacle moving device for a caster wheel is made of an electrically insulating material and is of two identical halves. The device is assembled without moving, stabilizing or disassembling the caster wheel by placing the halves on opposite sides of the caster wheel and then securing them together. A pair of roller assemblies inside the device abut the caster wheel so that rolling motion of the caster wheel pushes the device across the floor. Any obstacle encountered by the device is pushed along the path of movement of the wheel.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: December 15, 1992
    Inventors: John J. Navar, Thomas R. Navar