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| Number | Title | Issue Date |
| 4306537 | Gas fire A solid-fuel effect gas fire comprises an open-topped tray containing a mass of particulate refractory material, means for introducing gas into the tray to percolate upwards to the surface of the refractory material, an apertured or porous plate overlying... | 12/22/1981 |
| 4276869 | Barbecue grill slab A molded refractory slab for positioning in a barbecue grill between the burner unit and the heat-supporting grate has a plurality of uniformly spaced bosses simulating coals projecting upwardly from its top surface and integral dam means connecting adjac... | 07/07/1981 |
| 4275704 | Apparatus for central heating A structure placed in the fire-box of a furnace to improve combustion comprises a plurality of stainless steel strips which are supported on a frame in position to be heated to incandescence by the flame of the burner. At least some of the strips are twis... | 06/30/1981 |
| 4257757 | Radiant combustor assembly A radiant combustor assembly including a generally planar porous combustor element for burning an air-fuel mixture on the surface thereof without combustion flash back.... | 03/24/1981 |
| 4240400 | Space heater A room space such as a caravan is provided with a gas fired space heater having an upright casing within which is located a sealed surface combustion unit having a radiant plaque on one side of which gas is burnt. Primary and secondary air for combustion ... | 12/23/1980 |
| 4220132 | Gas-fired radiant burner A gas-fired radiant heater such as for thawing rail cars and their contents in car barns and the like during freezing weather. The heater has an elongated housing that supports a channel box and an elongated perforated semi-cylindrical mantle supported by... | 09/02/1980 |
| 3963414 | Apparatus for sequestering combustion gas of an open burner Combustion gas flowing alongside a surface of an open burner, such as over the upright catalytic bed of a space heater or a generally horizontal surface such as the top plate of a space heater, is segregated by an aperture in the path of flow of the combu... | 06/15/1976 |
| 3954388 | Gas burner and furnace A gas burner for industrial furnaces, such as launders, crucible melting furnaces, dry hearth breakdown furnaces, holding furnaces and the like, wherein the burner comprises a relatively narrow elongated strip of porous refractory material through which t... | 05/04/1976 |
| 3946719 | Radiant gas heater A heater includes coaxially arranged an external heat radiating shell, a central gas fuel tube and an intermediate perforated air conducting tube, from inside of which air flows into a combustion chamber. A tubular partition is provided with the space in betwe... | 03/30/1976 |
