Patents by Inventor Birger O. Anderson

Birger O. Anderson 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: 4382728
    Abstract: In a numerically controlled, gantry-type routing machine, a workpiece pressure-foot assembly is disposed crosswise over an elongate workpiece supporting bed for providing an effective hold-down force for stacked workpiece sheets. The hold-down force is applied to the workpiece stack at locations adjacent a router tool that is held and turned by a motor driven spindle assembly movably mounted on a gantry for orthogonally related lengthwise and crosswise movements with respect to the bed and workpiece. The pressure-foot assembly includes a pair of spaced parallel rails, pivotally supported about axes parallel to the rails, and a plurality of pressure-bearing rollers mounted on axes directly underlying each of the rails for supporting the rails, and accommodating travel of the assembly over the upper surface of the workpiece. The pair of rails and supporting rollers are arranged crosswise of the bed, paralleling the gantry, and underlying the spindle assembly.
    Type: Grant
    Filed: October 25, 1979
    Date of Patent: May 10, 1983
    Assignee: The Boeing Company
    Inventors: Birger O. Anderson, David L. Wagner