Portable infra-red spot heater

Claim 1

A PORTABLE INFRAR-RED RADIATION HEATING APPARATUS FOR USE WITH LIQUIFIED GASES ADAPTED TO OPERATE AT SUBFREEZING TEMPERATURES WITHOUT FROST OR ICE FORMATION IN ANY PORTION THEREOF AND COMPRISING IN COMBINATION, AN OPEN-ENDED BURNER HOUSING, AT LEAST ONE PERFORATE CATALYTICALLY ACTIVATED METALLIC MEMBER POSITIONED LATERALLY ACROSS THE INTERIOR OF SAID HOUSING ADJACENT THE OPEN END THEREOF, AT LEAST ONE METAL FUEL-AIR DIFFUSION-REFLECTOR MEMBER EXTENDING ACROSS THE INTERIOR OF SAID HOUSING ADJACENT THE INNER FACE OF SAID CATALYTIC MEMBER, SAID MEMBERS ACROSS SAID HOUSING THEREBY FORMING A CONFINED FUEL-AIR PLENUM SECTION WITHIN THE REMAINING SUBSTANTIALLY CLOSED INNER PORTION OF SAID HOUSING, A PROJECTING TUBULAR SECTION FORMEED ON SAID HOUSING AND CONNECTING WITH SAID PLENUM SECTION, A GAS OUTLET NOZZLE-AIR INSPIRATOR MEMBER IN HEAT EXCHANGE RELATION WITH AND EXTENDING THROUGH SAID TUBULAR SECTION INTO THE HOUSING TO RECEIVE BACKWARD REFLECTED HEAT FROM THE DEFUSING REFLECTOR MEMBER WHICH WARMS THE FUEL OUTLET NOZZLE AND AIR INSPIRATING MEMBER, SAID INSPIRATOR HAVING AN ELONGATED TUBULAR PORTION WHICH ENCOMPASSES A TUBULAR FUEL-AIR MIXING SECTION THEREBY TO FORM AN ANNULAR AIR INTAKE AND PASSAGEWAY THEREBETWEEN, THE AIR INTAKE TO SAID INSPIRATOR BEING POSITIONED WITHIN THE CONFINES OF THE TUBULAR SECTION OF THE HOUSING AND IN HEAT EXCHANGE RELATION THEREWITH TO PROVIDE A HEATED AIR INLET PASSAGEWAY WHEREBY THE FUEL-AIR MIXTURE IS FORMED WITHIN THE CONFINES OF SAID PLENUM SECTION, A GAS SUPPLY TUBE ADAPTED TO CONNECT SAID NOZZLE-AIR INSPIRATOR MEMBER WITH A FUEL SUPPLY SOURCE.