1808989

Information

• Patent Grant
• 1808989

• References
• Source

• Patent Number

  1,808,989

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1931
  93 years ago

• CPC

  • E03D3/04 - with piston valve and pressure chamber for retarding the valve-closing movement
  • Y10S137/901 - Biased ball valves with operators
  • Y10T137/4343 - By-pass cleaning
  • Y10T137/87378 - Second valve assembly carried by first valve head
  • Y10T137/87499 - Fluid actuated or retarded

• US Classifications

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