F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
F23M5/00—Casings; Linings; Walls
F23M5/08—Cooling thereof; Tube walls
F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
"dispositif pour la diffusion de fluide gazeux,en particulier d'air chaud,a travers une ouverture menagee dans la paroi d'un element de construction,tel qu'une hotte de cheminee"