2176730

Information

• Patent Grant
• 2176730

• References
• Source

• Patent Number

  2,176,730

• Date Filed

  Not available

• Date Issued

  Tuesday, October 17, 1939
  85 years ago

• CPC

  • E21B21/106 - Valve arrangements outside the borehole
  • Y10T137/4365 - Plural feed
  • Y10T137/4435 - Spring biased piston feed

• US Classifications

  • 137 - Fluid handling
  • 251 - Valves and valve actuation