2143439

Information

• Patent Grant
• 2143439

• References
• Source

• Patent Number

  2,143,439

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1939
  87 years ago

• CPC

  • E05F13/04 - by platforms lowered by the weight of the user
  • Y10S70/11 - Garage door lock
  • Y10S292/36 - Overhead door latches
  • Y10T16/532 - including adjustment for changing relative orientation of hinged members
  • Y10T16/54029 - Spring arm
  • Y10T16/82 - Counterbalance device, per se
  • Y10T292/0895 - Operating means
  • Y10T292/0898 - Cam
  • Y10T292/0933 - Push or pull rod
  • Y10T292/0947 - Cam
  • Y10T292/1056 - Cam
  • Y10T292/18 - Free-end-engaging means

• US Classifications

  • 049 - Movable or removable closures
  • 016 - Miscellaneous hardware
  • 070 - Locks
  • 292 - Closure fasteners