2720392

Information

• Patent Grant
• 2720392

• References
• Source

• Patent Number

  2,720,392

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1955
  71 years ago

• CPC

  • E21C35/1936 - the picks having a square- or rectangular-section shank
  • Y10S411/954 - Wedged slotted bolt
  • Y10T407/226 - including detent
  • Y10T407/2262 - Tool gripped directly by set screw
  • Y10T407/227 - with separate means to fasten tool seat to holder
  • Y10T407/28 - Miscellaneous

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 407 - Cutters, for shaping
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener