Gas heated tool with control valve and refillable container
OwnerNigel L. Siminventor
Life of this patent
Estimating the term…
Abstract
A combustion head for use with a hot melt glue gun includes a glue feed passageway through which hot glue is to pass to a nozzle, and a heating chamber, the glue feed passageway and the heating chamber having a wall in common through which heat is exchanged from the heating chamber to the passageway. The heating chamber includes a combustion region to which a gas/air mixture is fed and where combustion takes place, and a passage for feeding hot exhaust gases from the combustion region over the wall in common between the heating chamber and the glue feed passageway, to an exhaust gas outlet.
Claims9
A combustion head for use with a hot melt glue gun, comprising means defining a glue feed passageway through which hot glue is to pass to a nozzle, and means defining a heating chamber, the glue feed passageway and the heating chamber having a wall in common through which heat is exchanged from the heating chamber to the passageway, the heating chamber having a combustion region to which a gas/air mixture is fed and where combustion takes place, and means defining a passage for feeding hot exhaust gasses from the combustion region, over the wall in common between the heating chamber and the glue feed passageway, and to an exhaust gas outlet.
- wherein the means defining a passage in the heating chamber includes a labyrinth wall separating the combustion region from direct communication with the wall inn common between the heating chamber and glue feed passageway but permitting communication around an end of the labyrinth wall remote from the combustion region.
A combustion head for use with a hot melt glue gun, comprising means defining an elongate glue feed passageway through which hot glue is to pass to a nozzle, and means defining a heating chamber, the glue feed passageway and the heating chamber having an elongate wall in common through which heat is exchanged from the heating chamber to glue in the passageway, the heating chamber having an enclosed combustion region, spaced from said elongate wall in common, to which combustion takes place, and means defining a labyrinth of passages for feeding hot exhaust gases from the combustion region, over the wall in common between the heating chamber and the glue feed passageway, and to an exhaust gas outlet, wherein the glue feed passageway and the heating chamber are defined in a block of heat conducting material, and heat is transferred by means of exhaust gasses passing over said wall in common and by thermal conduction through the body of the block so as to provide an even distribution of heat along the glue feed passageway.
Dependencies are inferred from the claim text.