Patents by Inventor George Coull

George Coull 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).

  • Overhoist prevention system
    Patent number: 4905849
    Abstract: An overhoist prevention system suitable for use on a crane comprises (a) a proximity switch (17), (b) a movable detector plate (10) normally biassed away from the proximity switch, (c) an actuator (5) adapted for use with the hoist wire (4) for moving the detector plate towards the proximity switch and (d) a relay (21). The relay is actuated by a signal from the proximity switch and controls the operation of an alarm and/or the supply of the power to the winding drum of the crane.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: March 6, 1990
    Assignee: The British Petroleum Company p.L.c.
    Inventor: George Coull