Patents by Inventor Larry W. Deffendoll

Larry W. Deffendoll 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).

  • Flexible press and method of use
    Patent number: 5695538
    Abstract: A flexible ring mold for shaping heat softened glass sheets lifts a heat softened glass sheet and presses it against the shaping surface of an upper mold. Prior to the peripheral portions of the glass sheet contacting the upper mold, the flexible ring deforms to preliminarily shape the glass sheet.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: December 9, 1997
    Assignee: PPG Industries, Inc.
    Inventors: Dennis M. Goolsbay, Larry W. Deffendoll, Patrick L. Singleton
  • Method and apparatus for shaping sheets
    Patent number: 5401286
    Abstract: A flexible ring mold for shaping heat softened glass sheets is provided with an inner ring having a plurality of posts which help support the ring mold and maintain the mold's generally planar configuration during the initial lifting and shaping of a supported glass sheet. Prior to the entire glass sheet being pressed against an upper mold surface, the ring mold is separated from the support posts.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: March 28, 1995
    Assignee: PPG Industries, Inc.
    Inventors: Dennis M. Goolsbay, Larry W. Deffendoll, Patrick L. Singleton