Hand torch

Details Hand torch Hand torch

F - Mech Eng,Light,Heat,Weapons

23

Q

158/19

F23Q 7/12 (2006.01)

Patent

CA 1271121

ABSTRACT OF THE DISCLOSURE A simple, streamlined portable hand torch for attachment to a small propane or regulated natural gas tank includes an elongated barrel containing a venturi passage extending between the ends of the barrel, and a recess normally closed by a removable cover containing a retention gas line, a handle attached to one end of the barrel for receiving the top end of a propane tank; or quick disconnect for natural gas the handle containing an inlet passage for feeding gas to inlet ends of the retention gas line and the venturi passage; an elongated burner tube connected to the outlet end of the venturi passage; a burner nozzle on the outer free end of the burner tube; a retention line for carrying propane or natural gas from the retention line in the recess to the perforated outer free end of the burner nozzle; a spark plug extending into the venturi passage for igniting the propane/natural gas and air introduced through an opening in the bottom of the barrel; a piezoelectric arc crystal for firing the spark plug, and a push button mounted in a recess in the side of the barrel for actuating the arc crystal, The gas initially flows through both a restricted orifice in the retention line and a restricted orifice into the venturi passage. The gas and air mixture in the venturi passage is ignited by the spark plug and the flame travels to the burner nozzle to ignite the propane/natural gas discharged from the gas retention line. Once burning has been initiated at the burner nozzle, air is sucked into the venturi passage mixed with gas and flows through the burner tube to the burner nozzle for ignition by burning gas from the retention line.

536637

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