Patents by Inventor William H. McMakin

William H. McMakin 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).

  • Ladder lift apparatus
    Patent number: 4911266
    Abstract: An improved ladder lifting apparatus usable to lift heavy loads from the ground to a roof surface including a horizontally positioned, hand or shoulder mounted lifting bar or beam with a winch means, fastened to the bar or beam where one end of the lifting bar or beam is fastened and/or connected to the side rails of a vertically positioned ladder or extension ladder, with means to allow movement of the upper end of the ladder toward the roof to deposit the load on the roof or into a window of a multi-story building combined with optional stabilizing features for the ladder to make use of the lift bar at high elevations more safe.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: March 27, 1990
    Assignee: McCrane Co.
    Inventors: William H. McMakin, Mark R. McMakin, Glen R. McMakin
  • Ladder lift apparatus
    Patent number: 4770273
    Abstract: A lifting apparatus usable to lift heavy loads from the ground to a roof surface including a horizontally positioned, shoulder mounted lifting bar or beam with a winch means, fastened to the bar or beam where one end of the lifting bar or beam is pivotally connected to a vertically positioned ladder or extension ladder, with means to allow pivotal rotation of the upper end of the ladder toward the roof to deposit the load on the roof or into a window of a multi-story building.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: September 13, 1988
    Assignee: McCrane Co.
    Inventors: William H. McMakin, Mark R. McMakin, Glen R. McMakin