Patents Assigned to Drill-Out, Inc.
  • Drill-out threaded broken bolt extractor
    Patent number: 4777850
    Abstract: A drill-out threaded broken bolt fastener extractor combination tool wherein an extractor is combined with a drill head so that in use the drilling and extracting steps are performed in the same operation. The extractor is reciprocally and rotatably mounted on the drill bit shaft enabling the drill bit to penetrate within a broken bolt stud and subsequently having the extractor engage the same for removal. A drive head is provided for a suitable force-producing device.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: October 18, 1988
    Assignee: Drill-Out, Inc.
    Inventor: Eli Polonsky