Patents by Inventor Wallace H. Polzin

Wallace H. Polzin 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).

  • Compound hinge
    Patent number: 6564428
    Abstract: A compound hinge system includes a first link and a second link. The first link includes knuckles and arcing engaging surfaces next to stop portions that are configured for receiving engaging lug portions on a second link member. A second link member includes first and second sets of knuckles. One of the sets of knuckles cooperates with a hinged pin to pivot relative to the first link while the second set of knuckles receives a hinge pin to pivot relative to the second element. The lugs slide relative to the engaging surface and push against the stop portions to flex them outward and require additional force to move between various stops in the range of motion.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: May 20, 2003
    Assignee: Hoffman Enclosures, Inc.
    Inventors: John E. Richard, Craig E. Schinzel, Wallace H. Polzin, Clifford A. Klinger, William J. Nepsha, Marvin J. Thibodeau
  • Compound hinge
    Publication number: 20020004969
    Abstract: A compound hinge system includes a first link and a second link. The first link includes knuckles and arcing engaging surfaces next to stop portions that are configured for receiving engaging lug portions on a second link member. A second link member includes first and second sets of knuckles. One of the sets of knuckles cooperates with a hinged pin to pivot relative to the first link while the second set of knuckles receives a hinge pin to pivot relative to the second element. The lugs slide relative to the engaging surface and push against the stop portions to flex them outward and require additional force to move between various stops in the range of motion.
    Type: Application
    Filed: January 12, 2001
    Publication date: January 17, 2002
    Inventors: John E. Richard, Craig E. Schinzel, Wallace H. Polzin, Clifford A. Klinger, William J. Nepsha, Marvin J. Thibodeau