2146845

Information

• Patent Grant
• 2146845

• References
• Source

• Patent Number

  2,146,845

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1939
  86 years ago

• CPC

  • B60H1/00442 - using a vacuum
  • B60H1/00042 - the air passing only one heat exchanger
  • B60H1/00671 - Damper doors moved by rotation ; Grilles
  • B60H3/06 - Filtering
  • B60H2001/00157 - without by-pass
  • B60H2001/00214 - Devices in front of the passenger compartment

• US Classifications

  • 454 - Ventilation
  • 126 - Stoves and furnaces
  • 165 - Heat exchange
  • 236 - Automatic temperature and humidity regulation
  • 237 - Heating systems