3834762

Information

• Patent Grant
• 3834762

• References
• Source

• Patent Number

  3,834,762

• Date Filed

  Not available

• Date Issued

  Tuesday, September 10, 1974
  50 years ago

• CPC

  • E21D9/1006 - with rotary cutting tools
  • E21D9/01 - Methods or apparatus for enlarging or restoring the cross-section of tunnels
  • 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