Patents by Inventor Donna Rebecca Stefansic

Donna Rebecca Stefansic 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).

  • Shell press and method for forming a shell
    Patent number: 7302822
    Abstract: An apparatus and method for forming a shell with a central panel and a chuck wall is provided. The apparatus and method employ the use of a biasing member to selectively bias and control movement of the inner pressure sleeve and a die core having an outer diameter equal to or greater than the outer diameter of the punch core. The apparatus and method can also be employed in a single action press or a double action press.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: December 4, 2007
    Assignee: Stolle Machinery Company, LLC
    Inventors: Robert Dean Turnbull, Donna Rebecca Stefansic
  • Shell press and method of manufacturing a shell
    Patent number: 7143623
    Abstract: An apparatus and method for forming a shell with a central panel connected to a chuckwall with a z-fold located between the central panel and the chuckwall is provided. The apparatus and method of the invention is characterized by forming the z-fold in a downstroke of the press and supporting the z-fold in an upstroke of the press. The apparatus and method take place in a triple action die contained within a shell press. The apparatus and method can also be employed in a single action press or a double action press.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: December 5, 2006
    Assignee: Stolle Machinery Company, LLC
    Inventors: Robert Dean Turnbull, Donna Rebecca Stefansic