by means for returning flue gases to the combustion chamber or to the combustion zone

Full Title

Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel > by means for returning flue gases to the combustion chamber or to the combustion zone

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

COMBUSTION APPARATUS; COMBUSTION PROCESSES

Subclass:

METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL