Patents by Inventor Tim N. Johnson

Tim N. Johnson 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).

  • Triac control of positive temperature coefficient (PTC) heaters in room air conditioners
    Patent number: 8309894
    Abstract: An electric heating module for a room air conditioning system and methods are presented in which the duty cycle of the electric heater banks are controlled to limit the inrush current during the startup phase of the heater or to supplement the heat generated by the heat pump when the heat capacity of the heat pump nears the heat loss of the room being heated.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: November 13, 2012
    Assignee: General Electric Company
    Inventors: Tom C. Zimmer, Tim N. Johnson, Robert Lafleur, Brice Alan Bowley, Shinichi Hirose, Masanobu Amazutsumi, Gregory Michael Thomas, Tohru Ariga
  • TRIAC CONTROL OF POSITIVE TEMPERATURE COEFFICIENT (PTC) HEATERS IN ROOM AIR CONDITIONERS
    Publication number: 20110198340
    Abstract: An electric heating module for a room air conditioning system and methods are presented in which the duty cycle of the electric heater banks are controlled to limit the inrush current during the startup phase of the heater or to supplement the heat generated by the heat pump when the heat capacity of the heat pump nears the heat loss of the room being heated.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 18, 2011
    Inventors: Tom C. Zimmer, Tim N. Johnson, Robert Lafleur, Brice Alan Bowley, Shinichi Hirose, Masanobu Amazutsumi, Gregory Michael Thomas, Tohru Ariga