Patents by Inventor Kenneth J. Oswald

Kenneth J. Oswald 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).

  • Method for manufacturing pipe bells
    Patent number: 5352309
    Abstract: A method for manufacturing a filament reinforced plastic pipe including an integral bell, the method comprising the steps of winding a filament bundle, in a plurality of layers, around a mandrel having a cylindrical outer surface to form a pipe including a bell portion having a cylindrical inner surface, and machining the inner surface so that the inner surface is tapered.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: October 4, 1994
    Assignee: Smith Fiberglas Products Inc.
    Inventor: Kenneth J. Oswald