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| Number | Title | Issue Date |
| 8021143 | Furnace A gas fired furnace capable of operating with a 16:1 turndown ratio or greater. The furnace includes a plurality of burners (10) grouped into at least (14a) first and second (14b) groups, each group connected to a source of combust... | 09/20/2011 |
| 7857617 | Burner A gas burner including a burner body having a lower housing, an inlet conduit and a combustion surface element attached to the lower housing. A diffuser/reflector positioned within the body encourages even distribution and mixing of a combustible gas/air mixture. Th... | 12/28/2010 |
| 7850448 | Furnace A gas fired furnace capable of operating with a 16:1 turndown ratio or greater. The furnace includes a plurality of burners (10) grouped into at least (14a) first and second (14b) groups, each group connected to a source of combust... | 12/14/2010 |
| 7665426 | Burner A gas burner for a gas fired heating appliance, such as a water heater. The gas burner is located within a combustion chamber and includes an inlet conduit through which combustible gas and primary air are received. An air scoop shrouds the inlet conduit and at leas... | 02/23/2010 |
| 7255155 | Heat exchanger tube with integral restricting and turbulating structure A heat exchanger tube having an integral restricting and turbulating structure consisting of dimples formed by confronting indentations pressed into the sides of the heat exchanger tube. The dimples are comprised of indentations disposed in pairs which extend into t... | 08/14/2007 |
| 6921262 | Burner manifold apparatus and method for making same A method and apparatus for sealing the end of a burner tube including the step of forming a bore near the end of the burner tube and inserting a cone-shaped plug element into the bore until a circular periphery of the plug element abuttably engages a step defined by... | 07/26/2005 |
| 6916174 | Gas burner A burner having an elongate, generally tubular sheet metal body having an inlet end, a closed distal end and a tubular segment extending between the ends. The inlet end is formed to define a gas orifice holder which is adapted to mount a gas orifice element. The inl... | 07/12/2005 |
