Patents by Inventor Robert E. Iversen

Robert E. Iversen 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).

  • Nozzle retention system for a drill bit
    Patent number: 4878548
    Abstract: A nozzle retention system for a drill bit which includes a nozzle member which is retained by means of a keyway in the bit body. The bit body can include a partially cylindrical bore, truncated by opposing walls to form a lower contact surface within the bit body. The nozzle will be conformed to pass through the bore in a first orientation, and to be retained in the bore and against such contact surface when the nozzle is rotated to the second orientation.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: November 7, 1989
    Assignee: Eastman Christensen
    Inventors: Alfred Ostertag, Robert E. Iversen, Craig R. Hyland, Kenneth D. Enever, Steven R. Radford