3556599

Information

• Patent Grant
• 3556599

• References
• Source

• Patent Number

  3,556,599

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1971
  53 years ago

• CPC

  • E21D9/124 - Helical conveying means therefor
  • E21D9/065 - with devices for provisionally supporting the front face
  • E21D9/0875 - with a movable support arm carrying cutting tools for attacking the front face

• US Classifications

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