Patents by Inventor Todd D. Kreft

Todd D. Kreft 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).

  • Building system controller with multiple equipment failsafe modes
    Patent number: 11774127
    Abstract: An HVAC controller provides control values to or more output ports of the HVAC controller. Operation of the HVAC controller is monitored for one or more irregularities. When one or more irregularities in the operation are identified, a hold mode is entered. The hold mode includes holding the one or more current control values on the one or more output ports of the HVAC controller until the one or more irregularities in the operation of the HVAC controller are corrected or a predetermined hold time expires, whichever occurs first. When the one or more irregularities in the operation of the HVAC controller are not corrected before the predetermined hold time expires, a back off mode is entered. The back off mode includes setting each of one or more control values on one or more output ports of the HVAC controller to a corresponding configurable back off value.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: October 3, 2023
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Michael A. Pouchak, Peter Lehman, Lou Jones, Todd D. Kreft, Ravi Bharathi Krishnan, John Hutchey
  • BUILDING SYSTEM CONTROLLER WITH MULTIPLE EQUIPMENT FAILSAFE MODES
    Publication number: 20220397299
    Abstract: An HVAC controller provides control values to or more output ports of the HVAC controller. Operation of the HVAC controller is monitored for one or more irregularities. When one or more irregularities in the operation are identified, a hold mode is entered. The hold mode includes holding the one or more current control values on the one or more output ports of the HVAC controller until the one or more irregularities in the operation of the HVAC controller are corrected or a predetermined hold time expires, whichever occurs first. When the one or more irregularities in the operation of the HVAC controller are not corrected before the predetermined hold time expires, a back off mode is entered. The back off mode includes setting each of one or more control values on one or more output ports of the HVAC controller to a corresponding configurable back off value.
    Type: Application
    Filed: June 15, 2021
    Publication date: December 15, 2022
    Inventors: Michael A. Pouchak, Peter Lehman, Lou Jones, Todd D. Kreft, Ravi Bharathi Krishnan, John Hutchey