2997272

Information

• Patent Grant
• 2997272

• References
• Source

• Patent Number

  2,997,272

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1961
  63 years ago

• CPC

  • E21D15/512 - Arrangement of valves
  • E21D15/603 - by means of hydraulic devices
  • F16K31/363 - the fluid acting on a piston

• US Classifications

  • 251 - Valves and valve actuation