2552261

Information

• Patent Grant
• 2552261

• References
• Source

• Patent Number

  2,552,261

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1951
  73 years ago

• CPC

  • F04B9/1215 - the return stroke being obtained by a spring
  • A01K63/042 - Introducing gases into the water
  • F04B45/0536 - the actuating fluid being controlled by one or more valves

• US Classifications

  • 417 - Pumps
  • 043 - Fishing, trapping, and vermin destroying
  • 091 - Motors: expansible chamber type
  • 261 - Gas and liquid contact apparatus