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| Application No. | Application Title | Issue Date |
| 20120208137 | SYSTEM AND METHOD FOR OPERATING A COMBUSTOR A system for operating a combustor includes a nozzle and a fuel passage and diluent passage through the nozzle. A fuel supply is in fluid communication with the fuel inlet and the diluent inlet, and a diluent supply is in fluid communication with the diluent inlet. A me... | 08/16/2012 |
| 20120208136 | SYSTEM AND METHOD FOR OPERATING A COMBUSTOR A system for operating a combustor includes a nozzle and a fuel passage and air passage through the nozzle. A fuel supply is in fluid communication with the fuel inlet, and an air supply is in fluid communication with the air inlet and the fuel inlet. A method for opera... | 08/16/2012 |
| 20090297997 | COMBUSTION BLOWER CONTROL FOR MODULATING FURNACE A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion blower. Additional operating points may be calculated by interpolation and... | 12/03/2009 |
| 20090044794 | Inducer speed control method for combustion furnace In a multistage combustion furnace having a motor driven inducer blower and a pressure sensing device or set of switches for sensing pressure in the combustion gas flowpath through the furnace, a high firing rate blower speed and low firing rate blower speed are set bas... | 02/19/2009 |
| 20080127962 | Pressure switch assembly for a furnace A pressure switch assembly is used with a furnace controller having a first input and a second input. A first pressure switch is configured to actuate at a first combustion pressure level and is connected to the first input. A second pressure switch is configured to act... | 06/05/2008 |
| 20080044778 | Forced flue type combustion device A forced flue type combustion device in which an orifice 13 is provided in at least one of an air supply passage 5 and an exhaust passage 6, and in which the existence/nonexistence of a clog is determined on the basis of a detected pressure differen... | 02/21/2008 |
| 20070117056 | NEGATIVE PRESSURE CONDITIONING DEVICE WITH LOW PRESSURE CUT-OFF A pneumatic signal conditioning device may have a first fluid path and a second fluid path. The first fluid path includes a first inlet and a first outlet, and is configured such that the first outlet provides a first conditioned signal representing a pressure at the fi... | 05/24/2007 |
| 20070003891 | Apparatus and methods for variable furnace control A furnace control system for controlling a gas-fired induced-draft furnace having a variable speed inducer blower. A control apparatus, responsive to a signal corresponding to the magnitude of a pressure difference between an inlet and outlet of the combustion chamber, ... | 01/04/2007 |
| 20060223015 | Heat treatment method and heat treatment apparatus In a heat treatment method for supplying transforming gas and enriched gas inside a furnace and heat treating a workpiece inside the furnace, feedback control of carbon potential is performed by operating a supply flow rate of the enriched gas based on carbon potential ... | 10/05/2006 |
| 20060084018 | Method and apparatus for monitoring and controlling the stability of a burner of a fired heater The invention includes method and apparatus for controlling the stability of a burner, preferably a low NOx burner, of a natural draft heater. The method includes measuring the draft over a time period and generating a measured output from which a draft funct... | 04/20/2006 |
