Patents by Inventor Frank D. Wurth

Frank D. Wurth 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).

  • Control system for space heater/hearth
    Patent number: 9062881
    Abstract: A fuel burning space or zone heating appliance or heater rated or decorative fireplace (hearth appliance) and a method of operating a heater including a gas valve, a pressure transducer, a second pressure measurement device, a combustion fan, and a control. The control compares the signal from the pressure transducer to the signal from the second pressure measurement device. If the signals do not sufficiently correspond, the control prevents the gas valve from opening. If the signals sufficiently correspond, the control performs an ignition sequence and opens the gas valve. The control also compares the signal from the pressure transducer to a desired value based on a current input gas rate through the gas valve. If the signal is greater than the desired value, the control decreases power to the combustion fan. If the signal is less than the desired value, the control increases power to the combustion fan. If the signal is less than the desired value, the control turns the gas valve off to cease ignition.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: June 23, 2015
    Assignee: Empire Comfort Systems, Inc.
    Inventors: Bruce Dresner, Frank D. Wurth, David M. Christensen
  • CONTROL SYSTEM FOR SPACE HEATER/HEARTH
    Publication number: 20130216962
    Abstract: A fuel burning space or zone heating appliance or heater rated or decorative fireplace (hearth appliance) and a method of operating a heater including a gas valve, a pressure transducer, a second pressure measurement device, a combustion fan, and a control. The control compares the signal from the pressure transducer to the signal from the second pressure measurement device. If the signals do not sufficiently correspond, the control prevents the gas valve from opening. If the signals sufficiently correspond, the control performs an ignition sequence and opens the gas valve. The control also compares the signal from the pressure transducer to a desired value based on a current input gas rate through the gas valve. If the signal is greater than the desired value, the control decreases power to the combustion fan. If the signal is less than the desired value, the control increases power to the combustion fan. If the signal is less than the desired value, the control turns the gas valve off to cease ignition.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 22, 2013
    Applicant: Empire Comfort Systems, Inc.
    Inventors: Bruce Dresner, Frank D. Wurth, David M. Christensen