3921662

Information

• Patent Grant
• 3921662

• References
• Source

• Patent Number

  3,921,662

• Date Filed

  Not available

• Date Issued

  Tuesday, November 25, 1975
  49 years ago

• CPC

  • F16K17/34 - in which the flow-energy of the flowing medium actuates the closing mechanism
  • F16K17/285 - the cutting-off member being a ball
  • F16K31/08 - using a permanent magnet
  • F16L47/285 - with fluid cut-off means in the branching pipe
  • Y10T137/7854 - In couplings for coaxial conduits, e.g., drill pipe check valves
  • Y10T137/7869 - Biased open

• US Classifications

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