2985419

Information

• Patent Grant
• 2985419

• References
• Source

• Patent Number

  2,985,419

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1961
  63 years ago

• CPC

  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/587 - by means of power accumulators to be pre-charged by rock pressure

• US Classifications

  • 248 - Supports
  • 254 - Implements or apparatus for applying pushing or pulling force