Patents by Inventor Lee H. Boothe

Lee H. Boothe 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).

  • Release mechanism for locking hinge for multi-positioned ladder
    Patent number: 4697305
    Abstract: An improved hinge for collapsible ladders which includes a depressable release mechanism operable by one hand, leaving the other hand free to make ladder adjustment. The improved hinge includes a guide shaft disposed within a tubular hub member which is journaled within hinge plates to which the ladder stringers are connected. A handle with locking pins is secured to one end of the guide shaft, with the other end of the guide shaft being secured to a depressable hinge release mechanism.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: October 6, 1987
    Assignee: Harold R. Wing
    Inventor: Lee H. Boothe