2701711

Information

• Patent Grant
• 2701711

• References
• Source

• Patent Number

  2,701,711

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1955
  70 years ago

• CPC

  • E21D1/00 - Sinking shafts
  • Y10T408/3811 - with provision for adjustment of relationship of axes
  • Y10T408/3822 - at least one Tool including flexible drive connection
  • Y10T408/45 - including Tool with duct

• US Classifications

  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth
  • 299 - Mining or in situ disintegration of hard material
  • 408 - Cutting by use of rotating axially moving tool