3531159

Information

• Patent Grant
• 3531159

• References
• Source

• Patent Number

  3,531,159

• Date Filed

  Not available

• Date Issued

  Tuesday, September 29, 1970
  54 years ago

• CPC

  • E21F13/08 - Shifting conveyors or other transport devices from one location at the working face to another
  • E21D23/144 - Measuring the advance of support units with respect to internal points of reference
  • E21D23/26 - Hydraulic or pneumatic control

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 405 - Hydraulic and earth engineering