Patents by Inventor Paul M. Ohnstad

Paul M. Ohnstad 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).

  • Rotatable mold apparatus having replaceable molds and replacement methods
    Patent number: 6267917
    Abstract: The present invention includes a mold apparatus for facilitating replacement of rotatable molds therein. First and second frames are provided forming a plurality of mold cells and each mold includes an upper and a lower mold section. The upper mold section is removably coupled to the upper frame, while the lower mold section is removably coupled to the lower frame. Using this arrangement, a mold may be removed by detaching all connections between it and the frames, while maintaining the frames closed. Similarly, a mold may be inserted into a mold cell and connected to the frames while maintaining the frames closed. The removal and insertion operations may be performed radially or axially, depending on frame configuration.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: July 31, 2001
    Assignee: Norstar Aluminum Molds, Inc.
    Inventors: Gary R. Guzikowski, Thomas E. Acklin, Thomas V. Searing, Scott D. Ledermann, Paul M. Ohnstad