3777900

Information

• Patent Grant
• 3777900

• References
• Source

• Patent Number

  3,777,900

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1973
  51 years ago

• CPC

  • B66C23/84 - Slewing gear
  • B66C23/32 - Self-hoisting cranes
  • B66C23/72 - Counterweights or supports for balancing lifting couples
  • B66C23/76 - and movable to take account of variations of load or of variations of length of jib
  • B66C2700/0392 - Movement of the crane arm Coupling of the crane arm with the counterweights Safety devices for the movement of the arm

• US Classifications

  • 212 - Traversing hoists