Patents by Inventor Thomas E. Dittmer

Thomas E. Dittmer 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: 5669659
    Abstract: A platform assembly and wheel assembly for retrofitting a folding chair to form a combination chair and hand truck. The platform assembly is removably attached to the bottom section of the pair of leg members forming the front legs of the folding chair. Similarly, the wheel assembly is removably attached to the bottom section of the pair of load support members forming the back legs of the folding chair. The wheel assembly includes a plurality of brackets for removably attaching the wheel assembly to the pair of upright support members, an axle fixedly attached to the plurality of brackets, and a pair of wheels rotatably connected to opposite ends of the axle. The platform assembly includes a lift member, a transverse platform and a plurality of elongated right and left channels extending vertically from the lift member or clamps for removably attaching the platform assembly to the front legs of the folding chair.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: September 23, 1997
    Inventor: Thomas E. Dittmer