3641915

Information

• Patent Grant
• 3641915

• References
• Source

• Patent Number

  3,641,915

• Date Filed

  Not available

• Date Issued

  Tuesday, February 15, 1972
  53 years ago

• CPC

  • F24F11/047 - to constant value
  • G05D7/012 - the sensing element being deformable and acting as a valve
  • F24F2013/1493 - using an elastic membrane

• US Classifications

  • 454 - Ventilation