Patents by Inventor Frank A. De Puydt

Frank A. De Puydt 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).

  • Trailer hub cap device
    Patent number: 3955852
    Abstract: The hub cap device includes a cylindrical housing mountable on the trailer wheel hub and having a spring loaded piston that is movable between defined inner and outer positions. As the hub is filled with grease under pressure through a grease fitting on the piston, the piston is moved to its outer position wherein excess grease is bled to the atmosphere. A manually actuated control means on the hub cap device is adjustable to provide for the spring load being applied to urge the piston to the inner position therefor, when the trailer is to be used at a launching site, and for the spring load being removed from the piston when the trailer is to be used for road travel.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: May 11, 1976
    Assignee: Dico Company, Inc.
    Inventors: Frank A. De Puydt, Eugene P. Conradi