3778112

Information

• Patent Grant
• 3778112

• References
• Source

• Patent Number

  3,778,112

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1973
  51 years ago

• CPC

  • E21C35/1933 - the picks having a cylindrical shank
  • E02F9/2891 - Tools for assembling or disassembling
  • E21C25/28 - Chains or chain guides
  • E21C35/183 - with inserts or layers of wear-resistant material
  • E21C2035/1806 - Fixing methods or devices
  • E21C2035/1826 - characterised by adaptations to use an extraction tool

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 037 - Excavating