Patents by Inventor Edwin Hinkley

Edwin Hinkley 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 of making flute tube
    Patent number: 5402928
    Abstract: A fluted tube, defined by a multiplicity of parallel flutes extending over the length of the tube, is constructed by providing a flat portion of sheet metal, forming a series of undulations in one portion to form a corrugated section which is allowed to adjoin and be continuous with a flat section at a transition line or point. The sheet is engaged with tynes at the transition point and simultaneously welded as it is rolled into a spiral to form a multiplicity of flutes each bound by an undulation and a portion of the flat sheet metal. The flat sheet section can have a sufficient length so that it defines the last exterior layer of the spirally wound fluted structure to form a smooth walled, tubular envelope.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: April 4, 1995
    Assignee: Astech/MCI Manufacturing, Inc.
    Inventors: Richard S. Preston, Steven Parkinson, Edwin Hinkley, Dale Cook, Keith Mason