Patents by Inventor David A. Coss

David A. Coss 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).

  • Chip breaker drill bushing
    Patent number: 5108241
    Abstract: A chip breaker drill bushing is provided for a metal drilling apparatus. The bushing has a central channel through which a drill bit or drilling tool extends and rotates. The bushing is shaped at the workpiece end to collect metal offal carried up by the drill. Angled troughs guide the offal up and away from the workpiece and cutting edges on the end of the bushing chop the strands into small, easily handled chips.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: April 28, 1992
    Assignee: The Boeing Company
    Inventor: David A. Coss