Patents Assigned to A & W Deep-Well Drilling, Inc.
  • Fatigue resistant anvil bit for percussion rock drill
    Patent number: 3952819
    Abstract: A fatigue resistant anvil bit is described for use on a percussion rock drill. The anvil bit has a shank having a substantially uniform cross section terminated in a threaded end portion. A bit head is threadably mounted on the end portion having a diameter substantially greater than the bit shank. An anvil ring is shrunk fit on the shank engaging the bit head to provide lateral support and minimize the creation of fatigue fractures.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: April 27, 1976
    Assignee: A & W Deep-Well Drilling, Inc.
    Inventor: Gerald L. Adcock