2149889

Information

• Patent Grant
• 2149889

• References
• Source

• Patent Number

  2,149,889

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1939
  85 years ago

• CPC

  • E21F13/02 - Transport of mined mineral in galleries
  • E21D15/60 - Devices for withdrawing props or chocks
  • Y10S29/094 - Debris remover, catcher, or deflector
  • Y10T74/19614 - Disconnecting means

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 029 - Metal working
  • 074 - Machine element or mechanism
  • 248 - Supports
  • 299 - Mining or in situ disintegration of hard material