2221454

Information

• Patent Grant
• 2221454

• References
• Source

• Patent Number

  2,221,454

• Date Filed

  Not available

• Date Issued

  Tuesday, November 12, 1940
  84 years ago

• CPC

  • E21C31/12 - Component parts
  • E21C29/10 - Cable or chain co-operating with a winch or the like on the machine
  • Y10T74/1521 - Radial cam

• US Classifications

  • 074 - Machine element or mechanism
  • 192 - Clutches and power-stop control
  • 299 - Mining or in situ disintegration of hard material