Patents by Inventor William F. Connell

William F. Connell 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).

  • Self-propelled apparatus
    Patent number: 5184676
    Abstract: A self-propelled powered apparatus for traveling along a tubular member includes power driven wheels for propelling the apparatus, a biasing means for biasing the driven wheels into contact with the inner surface of the tubular member, and a retracting means for retracting the driven wheels from the driving position so that the apparatus can be withdrawn from the tubular member. The retracting means also include means to automatically retract the driven wheels from the driving position when the power to the apparatus is cut-off.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: February 9, 1993
    Inventors: Gordon A. Graham, William V. Pasznicki, William F. Connell, Kenneth V. Pratley