Patents by Inventor Peter J. McCallin

Peter J. McCallin 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).

  • Automatic level device
    Patent number: 4662809
    Abstract: An automatic level device for sensing the height and pitch of an aircraft and for adjusting a loader platform to align with the aircraft. An umbilical cord connected between the platform and the aircraft includes a tube partially filled with mercury and having a plurality of electrodes spaced along one end of the tube. As the height of the aircraft changes the mercury contacts a different number of electrodes and the electrodes provide signals for adjusting the level of the platform and aligning the platform with the aircraft.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: May 5, 1987
    Assignee: FMC Corporation
    Inventors: Charles R. Sturtz, Peter J. McCallin