3695718

Information

• Patent Grant
• 3695718

• References
• Source

• Patent Number

  3,695,718

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1972
  52 years ago

• CPC

  • E21D9/10 - Making by using boring or cutting machines
  • E21D9/003 - Arrangement of measuring or indicating devices for use during driving of tunnels
  • E21D9/02 - Driving inclined tunnels or galleries
  • E21D9/1093 - Devices for supporting, advancing or orientating the machine or the tool-carrier
  • E21D9/116 - by means of non-concentric rotary heads

• US Classifications

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