2771746

Information

• Patent Grant
• 2771746

• References
• Source

• Patent Number

  2,771,746

• Date Filed

  Not available

• Date Issued

  Tuesday, November 27, 1956
  68 years ago

• CPC

  • F16B13/0816 - with a wedging drive-pin
  • E21D21/0026 - characterised by constructional features of the bolts
  • F16B2013/007 - to be fastened in undercut holes
  • F16B2013/008 - used for mining purposes

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 052 - Static structures
  • 175 - Boring or penetrating the earth
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener