Combustion – Process of combustion or burner operation
Reexamination Certificate
2000-05-13
2001-05-29
Lazarus, Ira S. (Department: 3743)
Combustion
Process of combustion or burner operation
C431S123000, C239S117000, C126S038000
Reexamination Certificate
active
06238205
ABSTRACT:
FIELD OF THE INVENTION
This invention concerns a burner assembly to be used in lightweight portable or stationary stoves for different liquid and gaseous fuels.
DESCRIPTION OF THE RELATED ART
This type of stoves using liquid or gaseous fuels have clogging problems caused by building up of the fuel itself in the nozzle orifice, such as coke formation, or of extraneous material. Then there is a need for cleaning this orifice.
This type of burners usually have a cleaning needle inside the orifice, which needle could be brought to penetrate the orifice to clean the orifice and then retracted to clear the orifice. One known method to move the needle in and out of the orifice is by means of a pinion, engaging a rack provided on a burner body carrying the needle. The pinion is handled from the outside of the burner. Another known method is to use a weighted needle which upon shaking enters the orifice with an in and out motion. The drawback of the first method is that there is a need for very exact fit between rack and pinion and the assemblage is troublesome. The second method deals with a device, that is more simple to produce and assemble. However it is difficult to handle especially when burning and could not at all be used in connection with heavier or stationary stoves.
SUMMARY OF THE INVENTION
The present invention is directed to a burner assembly for burning of liquid or gaseous fuel of different types. The burner assembly has a cleaning needle which is possible to move in and out of the nozzle orifice by means of magnetic force. The invention could be used in connection with lightweight stoves, more heavy stoves or stationary stoves.
When moving a magnet provided outside a burner assembly housing the magnetic needle inside the housing will move correspondingly, which imply that by means of the outside, movable magnet it is possible to move the needle up and down in the housing and thereby in and out of the nozzle orifice.
The needle is suitably provided on a needle body which per se could be a magnet or which could be provided with a built in, separate magnet. The magnet outside the housing could be a permanent magnet or a magnet of electromagnetic type. In this case it would be possible to have this electromagnetic type magnet capable of producing opposite magnet fields by shifting the magnetic polarization.
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John Lezdey & Assoc.
Lazarus Ira S.
Lee David
Optimus International AB
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