Patent ID: 7967007

Claim:
A heater configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure, the heater comprising: a first oxygen depletion sensor orifice communicating with a fluid flow controller; a second oxygen depletion sensor orifice communicating with said fluid flow controller; a first heater nozzle line defining a passageway; a second heater nozzle line defining a passageway; a first cavity in fluid communication with the first heater nozzle line, the first cavity having an input end configured to couple with the first heater nozzle line and an output end configured to dispense fuel at the first pressure, wherein the first cavity decreases in size toward the output end thereof; and a second cavity in fluid communication with the second heater nozzle line, the second cavity having an input end configured to couple with the second heater nozzle line and an output end configured to dispense fuel at the second pressure, wherein the second cavity decreases in size toward the output end thereof; wherein said fluid flow controller is configured (1) to permit the flow of fuel to the first cavity and to direct a first fuel to said first oxygen depletion sensor orifice when the controller is in a first position and (2) to permit the flow of fuel to the second cavity and to direct a second fuel to said second oxygen depletion sensor orifice when the controller is in a second position.