2686047

Information

• Patent Grant
• 2686047

• References
• Source

• Patent Number

  2,686,047

• Date Filed

  Not available

• Date Issued

  Tuesday, August 10, 1954
  70 years ago

• CPC

  • E21C37/08 - Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
  • E04G23/08 - Wrecking of buildings

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 254 - Implements or apparatus for applying pushing or pulling force