2977978

Information

• Patent Grant
• 2977978

• References
• Source

• Patent Number

  2,977,978

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  64 years ago

• CPC

  • F16K17/044 - with more than one spring
  • Y10T137/7739 - Pop closing valves

• US Classifications

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