Patents by Inventor Dale E. Knowlton

Dale E. Knowlton 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).

  • Rivet driving die and method
    Patent number: 4630463
    Abstract: A die particularly adapted to drive a rivet, where the head of the rivet has a relatively steep circumferential side surface. The die engages the rivet head in a manner that initially the middle portion of the die driving surface exerts substantial force into the shank portion of the rivet, after which the die driving surface comes in greater overall driving engagement with the entire rivet head. Further, the die has a circumferential lip which limits lateral movement of the die relative to the rivet head.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: December 23, 1986
    Assignee: The Boeing Company
    Inventor: Dale E. Knowlton
  • Carpenter's layout tool
    Patent number: D337535
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: July 20, 1993
    Inventor: Dale E. Knowlton