3621868

Information

• Patent Grant
• 3621868

• References
• Source

• Patent Number

  3,621,868

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  53 years ago

• CPC

  • A62B18/08 - Component parts for gas-masks or gas-helmets
  • A62B9/04 - Couplings Supporting frames
  • Y10T29/49314 - with assembly or composite article making
  • Y10T137/0491 - Valve or valve element assembling, disassembling, or replacing
  • Y10T137/2552 - With pulsation responsive pilot valve
  • Y10T137/7504 - Removable valve head and seat unit
  • Y10T137/7559 - Pump type
  • Y10T137/7854 - In couplings for coaxial conduits, e.g., drill pipe check valves
  • Y10T137/7891 - Flap or reed

• US Classifications

  • 137 - Fluid handling
  • 029 - Metal working