Patents by Inventor Herman M. Thomas

Herman M. Thomas 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).

  • HVAC system having a diagnostics controller associated therewith
    Patent number: 10061330
    Abstract: In one aspect, the present disclosure provides a controller for a HVAC system having an economizer with a damper and pressure sensors on opposing sides of the economizer. The controller comprise a diagnostics controller having a program configured to use pressure difference sensor data to determine if a pressure difference across the economizer is outside an operational design parameter of the HVAC system, and generate an error signal when the pressure difference is outside the operational design parameter.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: August 28, 2018
    Assignee: Lennox Industries Inc.
    Inventors: Jonathan Douglas, Herman M. Thomas
  • CONTROLLER FOR A HVAC SYSTEM HAVING A CALIBRATION ALGORITHM
    Publication number: 20140371918
    Abstract: This disclosure presents a controller for use with a HVAC system that has a program stored therein that is configured to relate a torque of a fan motor of a HVAC system with an airflow rate of the HVAC system, such that a selected airflow rate will cause the fan motor to operate at a torque that will produced the selected airflow rate.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Inventors: Jonathan Douglas, Alan Bennett, Farhad Abrishamkar, Paul Foden, Stephen Walter, Herman M. Thomas, Krishna Doddamane
  • HVAC SYSTEM HAVING A DIAGNOSTICS CONTROLLER ASSOCIATED THEREWITH
    Publication number: 20130282186
    Abstract: In one aspect, the present disclosure provides a controller for a HVAC system having an economizer with a damper and pressure sensors on opposing sides of the economizer. The controller comprise a diagnostics controller having a program configured to use pressure difference sensor data to determine if a pressure difference across the economizer is outside an operational design parameter of the HVAC system, and generate an error signal when the pressure difference is outside the operational design parameter.
    Type: Application
    Filed: June 17, 2013
    Publication date: October 24, 2013
    Inventors: Jonathan Douglas, Herman M. Thomas