Patents by Inventor David H. Dowell

David H. Dowell 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).

  • Synchronized rivet gun system
    Patent number: 6823709
    Abstract: A rivet gun system includes a rivet gun frame having two ends. A die is coupled to one end, and a force sensor coupled to the rivet gun frame. The force sensor detects force applied to the die and generates a force signal in response to the force. A holding coil defines a channel within the rivet gun frame and generates an electromagnetic force along the channel. The channel includes an end defined by an end stop and an end defined by the die. A main coil further defines the channel between the holding coil and the die. The main coil also generates an electromagnetic force along the channel. A plunger slides through the channel in response to the electromagnetic forces. A force sensor electronics controller receives the force signal from the force sensor and activates the holding coil and the main coil in response to the force signal above an activation threshold.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: November 30, 2004
    Assignee: The Boeing Company
    Inventors: David H. Dowell, Philip E. Johnson, Frederic P. Berg, George A. Perry
  • Synchronized rivet gun system
    Publication number: 20040025313
    Abstract: A rivet gun system includes a rivet gun frame having two ends. A die is coupled to one end, and a force sensor coupled to the rivet gun frame. The force sensor detects force applied to the die and generates a force signal in response to the force. A holding coil defines a channel within the rivet gun frame and generates an electromagnetic force along the channel. The channel includes an end defined by an end stop and an end defined by the die. A main coil further defines the channel between the holding coil and the die. The main coil also generates an electromagnetic force along the channel. A plunger slides through the channel in response to the electromagnetic forces. A force sensor electronics controller receives the force signal from the force sensor and activates the holding coil and the main coil in response to the force signal above an activation threshold.
    Type: Application
    Filed: August 6, 2002
    Publication date: February 12, 2004
    Inventors: David H. Dowell, Philip E. Johnson, Frederic P. Berg, George A. Perry