3545811

Information

• Patent Grant
• 3545811

• References
• Source

• Patent Number

  3,545,811

• Date Filed

  Not available

• Date Issued

  Tuesday, December 8, 1970
  54 years ago

• CPC

  • E21D9/115 - with cutting tools mounted pivotably or slidable on the head
  • E21B10/10 - with roller axle supported at both ends
  • E21B10/12 - with discs cutters
  • E21B10/20 - characterised by detachable or adjustable parts
  • E21B10/28 - with non-expansible roller cutters
  • E21D9/104 - Cutting tool fixtures
  • E21D9/112 - by means of one single rotary head or of concentric rotary heads
  • E21D9/12 - Devices for removing or hauling away excavated material or spoil Working or loading platforms

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth