Patents by Inventor Carl T. Crawford

Carl T. Crawford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • ICE DEFLECTOR FOR A FAN HOUSING
    Publication number: 20150147160
    Abstract: In various implementations, a fan system may include a housing and a fan. The fan may reside in an orifice of the housing. The fan system may include a grate disposed proximate a top surface and an ice deflector. The ice deflector may inhibit ice formation on portions of the housing, orifice, and/or fan residing in the orifice.
    Type: Application
    Filed: November 22, 2013
    Publication date: May 28, 2015
    Applicant: Lennox Industries Inc.
    Inventors: Carl T. Crawford, Chris McHugh
  • ICE DEFLECTOR FOR A FAN HOUSING
    Publication number: 20150147161
    Abstract: In various implementations, a fan system may include a housing and a fan. The fan may reside in an orifice of the housing. The fan system may include a grate disposed proximate a top surface and an ice deflector. The ice deflector may inhibit ice formation on portions of the housing, orifice, and/or fan residing in the orifice.
    Type: Application
    Filed: November 22, 2013
    Publication date: May 28, 2015
    Applicant: Lennox Industries Inc.
    Inventors: Carl T. Crawford, Chris McHugh
  • Heat pump control system using passive defrost
    Patent number: 8549867
    Abstract: A heat pump system includes a controller and a closed system that includes a condensing heat exchanger coil, an evaporating heat exchanger coil, a refrigerant and a compressor. The compressor is configured to compress the refrigerant, thereby causing the refrigerant to have a greater pressure in the condensing heat exchanger coil than in the evaporating heat exchanger coil. The controller is configured to perform a passive defrost of the evaporating heat exchanger coil. The passive defrost includes disabling the compressor and providing a bypass path between the condensing and evaporating heat exchanger coils that bypasses the compressor. The bypass path allows the refrigerant to flow from the condensing heat exchanger coil to the evaporating heat exchanger coil while the compressor is disabled.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: October 8, 2013
    Assignee: Lennox Industries Inc.
    Inventors: Carl T. Crawford, Robert B. Uselton, Bruce Perkins
  • HEAT PUMP CONTROL SYSTEM USING PASSIVE DEFROST
    Publication number: 20110100041
    Abstract: A heat pump system includes a controller and a closed system that includes a condensing heat exchanger coil, an evaporating heat exchanger coil, a refrigerant and a compressor. The compressor is configured to compress the refrigerant, thereby causing the refrigerant to have a greater pressure in the condensing heat exchanger coil than in the evaporating heat exchanger coil. The controller is configured to perform a passive defrost of the evaporating heat exchanger coil. The passive defrost includes disabling the compressor and providing a bypass path between the condensing and evaporating heat exchanger coils that bypasses the compressor. The bypass path allows the refrigerant to flow from the condensing heat exchanger coil to the evaporating heat exchanger coil while the compressor is disabled.
    Type: Application
    Filed: November 2, 2009
    Publication date: May 5, 2011
    Applicant: Lennox Industries Inc.
    Inventors: Carl T. Crawford, Robert B. Uselton, Bruce Perkins