Patents by Inventor Donald R. Torgerson

Donald R. Torgerson 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).

  • Spacer for rotary peening apparatus
    Patent number: 5284039
    Abstract: The invention relates to a spacer for a rotary peening apparatus having a hub and a plurality of peening flaps that are spaced about and retained by the generally cylindrical peripheral surface of the hub. Each peening flap includes several peening rivets attached to a distal end of the peening flap. The spacer of the present invention positions the peening flaps at at least two locations inward of one of the hub ends of the hub, which enables the rotary peening apparatus to impart a uniform surface finish to a surface.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: February 8, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Donald R. Torgerson