3688869

Information

• Patent Grant
• 3688869

• References
• Source

• Patent Number

  3,688,869

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  53 years ago

• CPC

  • F01N13/16 - Selection of particular materials
  • F01N1/02 - by using resonance
  • F01N1/22 - the parts being resilient walls
  • F02B75/34 - Ultra-small engines
  • F02M35/1216 - by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
  • F02M35/1227 - by using multiple air intake flow paths
  • F02M35/1266 - comprising multiple chambers or compartments
  • F02M35/1272 - using absorbing, damping, insulating or reflecting materials
  • F01N2490/15 - Plurality of resonance or dead chambers
  • F01N2490/155 - being disposed one after the other in flow direction
  • Y10S181/404 - Hobby craft engine muffler

• US Classifications

  • 181 - Acoustics