Low-temperature melting metals spray-gun
OwnerManiglia Carmeloinventor
Life of this patent
Estimating the term…
Abstract
A low temperature melting metal such as tin, is contained in a small pot, heated by the flame of a burner. The metal is drawn from the bottom of the pot through a spray nozzle by venturi action of an air jet which forcefully throws molten droplets of metal against the surface to be coated. Means associated with the pot are provided to preheat the air stream before it comes into contact with the molten metal. Advantageously, the pot is closed by a cover, and air under pressure is supplied to the top of the pot, so as to force the molten metal towards the spray nozzle.
Claims7
A low temperature melting metals spray gun comprising in combination a pot for the metal to be sprayed, means for heating said pot, a spray nozzle mounted at the bottom of said pot and comprising an innermost nozzle communicating with the interior of the pot through a needle valve, and a concentric outer nozzle communicating with an air feed duct, a handle secured to said pot and provided with manually operable trigger means controlling the operation of the needle valve of the metal spray nozzle and the operation of an air cut-off valve mounted in a duct connected at one end to a compressed air source and at its other end to the inlet of an air circulating chamber mounted in heat-exchange relation with said pot, and having its outlet connected to the air feed duct of said outer nozzle.
A low temperature meltng metals spray gun comprising in combination a pot for the metal to be sprayed, means for heating said pot, a spray nozzle mounted at the bottom of said pot and comprising an innermost nozzle communicating with the interior of the pot through a needle valve and a concentric outer nozzle, a handle secured to said pot and provided with manually operable trigger means controlling the operation of the needle valve of the metal spray nozzle and the operation of an air cut-off valve mounted in an air feed duct connected at one end to a compressed air source, a cylindrical jacket, open at its upper end, surrounding said pot, duct means for connecting said jacket to said air feed duct and to said concentric outer nozzle, a removable cover for closing in an air tight manner said pot and the upper end of said concentric cylindrical jacket, and conduit means in said cover for connecting the interior of said jacket to the interior of said pot at a position above the level of the molten metal in said pot.
Dependencies are inferred from the claim text.