.~.~ Having protective cooling means for combustion material feed structure
(under subclass 159) Apparatus in which a conduit, passage, or other structure by which combustion material for heating the chamber is fed to, or removed from, a heating chamber is protected from damage by a cooling means.
SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers,
6.5, and 6.7+ for a cooling device for a gas or air port of a nominal furnace comprising a closed chamber or conduit for water.
239, Fluid Sprinkling, Spraying, and Diffusing,
132.3, for a spray nozzle not specialized to combustion cooled by a heat exchange fluid. 431, Combustion,
160, for a combustion chamber having no work material handling feature in which combustion material feed structure is cooled by a fluid additional to the combustion materials.