Patents by Inventor Francis X. Swietlik

Francis X. Swietlik 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).

  • Extended nip press with hydraulic pressure equalizer valve
    Patent number: 5650048
    Abstract: An extended nip press has a shoe driven by two pistons to engage a blanket-supported web against a crown controlled roll. Each ENP shoe piston is offset from the line of force application of the crown control piston by a moment arm distance. A balancing of the hydraulic pressures in the ENP shoe cylinders and the crown control cylinder is achieved by two equalizer valves. Each valve has a slidable spool with faces of a selected cross-sectional area to respond to hydraulic fluid from the various cylinders to retain the correct proportion between the forces applied by the ENP shoe pistons and the crown control piston.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: July 22, 1997
    Assignee: Beloit Technologies, Inc.
    Inventor: Francis X. Swietlik