Patents by Inventor Erland L. Hagman

Erland L. Hagman 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).

  • Ergonomic workholder with positional control
    Patent number: 5957445
    Abstract: A ball and socket workpiece holder is provided that may be locked to hold a workpiece in a predetermined position on a workholder arm. The workholder may be unlocked to permit the workholder arm and workpiece to rotate through a limited predetermined angle.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: September 28, 1999
    Inventors: Erland L. Hagman, Michael S. Valentine
  • Multi-directional roller
    Patent number: 5404984
    Abstract: A system of rollers that form a conveyor for parcels. The roller units are made up of segmented roller elements so that the parcels can be conveyed in any horizontal direction. Each roller unit has a plurality of spokes to maintain the segmented roller elements in position. A replaceable bearing unit permits the series of roller units to be accommodated on shafts of various configurations.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: April 11, 1995
    Inventor: Erland L. Hagman
  • Ergonomic workpiece positioner
    Patent number: 5314174
    Abstract: A ball and socket type universal workpiece support is provided that is locked in its normal state. A balanced system of spring force is provided to lock the positioner in any position chosen by the operation. It will remain in the selected position until fluid pressure is provided to release it for movement to another position.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: May 24, 1994
    Inventor: Erland L. Hagman