Patents by Inventor Charles L. Piazza

Charles L. Piazza 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).

  • Venting device for rotocase shell molds
    Patent number: 5380183
    Abstract: A venting device for a rotocast shell mold body having a neck and a flanged neck plate thereon. The venting device is a tube formed of black iron pipe of a predetermined diameter and length and mounted in an opening formed in one of the neck or a cover mounted on the neck plate, and extended for approximately half its length into the interior of the mold. When used with the neck of the mold, the tube is welded in place, and when used with a mold cover, the tube is threadedly mounted therein.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: January 10, 1995
    Assignee: Davidson Textron, Inc.
    Inventors: Charles L. Piazza, Edward E. Therrien
  • Rotational mold apparatus
    Patent number: 5094608
    Abstract: A shell mold support apparatus for rotationally casting thermoplastic polymer particles onto a heated casting surface to form a thin polymer shell conforming to the shape of a heated casting surface includes a base framework that supports a bottom shell mold; a cover carrier is supported on the base framework so as to either open or close a cover or top shell mold with respect to the bottom shell mold; and a hinged support couples the cover carrier to the base framework for movement against an opening stop.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: March 10, 1992
    Assignee: Davidson Textron Inc.
    Inventors: Charles L. Piazza, Edward E. Therrien