Patents by Inventor Douglas GRAY

Douglas GRAY 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).

  • Publication number: 20220259882
    Abstract: The invention provides a tube for use as part of a structural support pole, and a method for manufacturing a tube, comprising a plurality of tube perimeter sections, wherein each tube perimeter section of the first plurality of tube perimeter sections is formed by pultrusion, each tube perimeter section of the first plurality of tube perimeter sections having the same pultrusion cross-sectional shape, and wherein each tube perimeter section comprises: an outer surface; an inner surface; a side surface; and a cavity between the inner surface and the outer surface, wherein the cavity extends through the tube perimeter section. The side surface is adapted to be fastened to an adjacent side surface of an adjacent tube perimeter section, thereby to form an annular arrangement of tube perimeter sections. The tube further comprises a first filament, wherein the first filament is wound about the outer surfaces of the first plurality of tube perimeter sections arranged in an annular arrangement.
    Type: Application
    Filed: June 11, 2020
    Publication date: August 18, 2022
    Inventors: David CHAMBERS, Douglas GRAY