Patents by Inventor Donna Stefansic

Donna 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
    Publication number: 20070283738
    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: Application
    Filed: June 7, 2006
    Publication date: December 13, 2007
    Applicant: Stolle Machinery Company, LLC
    Inventors: Robert Turnbull, Donna Stefansic