Patent ID: 7007636

Claim:
A direct-fired steam generator, comprising: a combustion chamber including an air/fuel mixture inlet at one end and a combustion gas/steam outlet at an opposite second end; a carburetor having an outlet end connected to said inlet and including a combustion air inlet and a fuel inlet; a source of air being coupled to said air inlet; a source of fuel, said source of fuel including a tank containing liquid propane; a source of heated liquid, a converter arrangement coupled for receiving liquid propane from said tank and for receiving heated liquid from said source of heated liquid, with the converter using heat from said heated liquid to change said liquid propane to gaseous propane, and said converter arrangement including a gaseous fuel outlet being connected to said fuel inlet; and said carburetor including control structure operative for metering fuel into said carburetor from said fuel inlet in accordance with the amount of air passing through said carburetor.