Granite flame finishing internal burner

Details Granite flame finishing internal burner Granite flame finishing internal burner

1991-03-18

1992-06-30

Jones, Larry

Combustion

Means at chamber outlet establishing combustion pressure...

Chamber outlet forms jet nozzle

431157, 175 11, 175 14, F23R 300

Patent

active

051258285

ABSTRACT:
An internal burner for producing a subsonic air-fuel flame jet capable of flame finishing granite of similar hard stone has a body forming a closed combustion chamber fed with an essentially stoichiometric flow of compressed air and fuel such that upon ignition and combustion of the reactants, there is produced at pressures in excess of 30 psig hot products of combustion. A first nozzle within the body of relatively small diameter d.sub.1 at the exit end of the combustion chamber expands the products to supersonic velocity. A duct of sufficiently large diameter within the body downstream of the first nozzle and open thereto converts a jet of hot gases to subsonic velocity by shock action prior to discharging the hot gas products of combustion. A second nozzle having a large diameter d.sub.2 in excess of the diameter d.sub.1 of the first nozzle and open to the duct at the end opposite the first nozzle produces a subsonic flame jet to be directed against the rock surface.

REFERENCES:
patent: 2882016 (1959-04-01), Aitchison et al.
patent: 3255802 (1966-06-01), Browning
patent: 3463249 (1969-08-01), Browning
patent: 3993431 (1976-11-01), Oda et al.
patent: 4003692 (1977-01-01), Moore
patent: 4204831 (1980-05-01), Vanderveen
patent: 4342551 (1982-08-01), Browning
patent: 4830604 (1989-05-01), Korenberg

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