Patents by Inventor Einar W. Nilsson

Einar W. Nilsson 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).

  • Patent number: 4763504
    Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll and a male roll of unequal diameters. In addition, positive guidance and considerably more capacity to straighten smaller stock sizes is obtained by providing adjustable outboard roll supports at each end of the basic six-roll straightener, thereby also reducing whipping of the stock.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: August 16, 1988
    Inventor: Einar W. Nilsson
  • Patent number: 4711112
    Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock. Also provided is a method for maintaining the stock in the pass line of a cross-roll straightener having a female roll of larger diameter than the male roll.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: December 8, 1987
    Inventor: Einar W. Nilsson
  • Patent number: 4494394
    Abstract: A cross-roll straightener adapted to straighten round metal stock, wire, rods, bars and tubes by rotatingly advancing the stock through a central curved pass such that it is flexed beyond the yield point in a substantially uniform and gradual manner. A three pair roll arrangement provides uniform guidance and flexure while avoiding marking or collapsing of the stock.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: January 22, 1985
    Inventor: Einar W. Nilsson