Patents by Inventor Charles D. Lewallen

Charles D. Lewallen 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).

  • Patent number: 4284286
    Abstract: A handtruck having a collapsible supporting surface adaptable for converting the handtruck into a portable work table. The handtruck is provided with a toe blade extender pivotal between folded and operative positions adjacent to the standard toe blade of the handtruck. The toe blade extender has dual functions. First, in its operative position parallel to and in abutment with the toe blade, it enables the handtruck to handle bulky loads. Second, in an intermediate position between its folded and operative positions, it serves as a support for a planar supporting surface which is pivotally attached to the handtruck frame at the opposite end thereof from the toe blade extender and serves as a work table when pivoted away from the handtruck frame and supported by the toe blade extender.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: August 18, 1981
    Inventor: Charles D. Lewallen