US3890086A

US3890086A - Liquid fuel burner for burning liquid fuel in gasified form

Info

Publication number: US3890086A
Application number: US499026A
Authority: US
Inventors: Kingo Miyahara
Original assignee: Dowa KK
Current assignee: Dowa KK
Priority date: 1973-08-22
Filing date: 1974-08-20
Publication date: 1975-06-17
Anticipated expiration: 1992-06-17
Also published as: CA1021683A

Abstract

A liquid fuel burner in which a fuel gasifying member is mounted for rotation on the rotary shaft extending into the main body of the burner which is formed with a gas chamber along its inner periphery by mounting a combustion plate and an inner bottom wall therealong. The fuel gasifying member is formed with an open end through which the fuel gasifying member communicates with the gas chamber, and a fuel supply member is mounted at the forward end portion of the rotary shaft to be disposed within the fuel gasifying member and in spaced juxtaposed relation to the substantially central portion of the inner surface of the closed end of the fuel gasifying member which is formed on its wall with a plurality of offset portions for promoting diffusion of liquid fuel by forming a perfect film on its wall. The gas chamber is formed in a suitable position with a narrowed portion to increase the rate of movement of gasified fuel therethrough, and at its forward end portion with a gas reservoir to ensure blowing of the gasified fuel in equal volumes through all the gasified fuel blowing openings formed in the combustion plate. A liquid fuel combustion initiation ignition plug and a gasified fuel combustion initiation ignition plug are provided separately and independently of each other, so that the initial state of combustion of the atomized liquid fuel can be automatically switched to the state of combustion of gasified fuel for sustained combustion of the gasified fuel.

Description

United States Patent Miyahara I LIQUID FUEL BURNER FOR BURNING LIQUID FUEL IN GASIFIED FORM [75] Inventor: Kingo Miyahara. Tokyo. Japan [73] Assignee: Dowa Co., Ltd., Tokyo. Japan [22] Filed: Aug. 20, 1974 [21] App]. No.: 499,026

[30] Foreign Application Priority Data Aug. 22, 1974 Japan 49-98433 [52] US. Cl. 431/168; 239/214.11; 239/214.17 (51] Int. Cl. F23d 11/04 [58] Field of Search 431/168. 169', 239/214.l l,

[56] References Cited UNITED STATES PATENTS 1.707.774 4/1929 Schcminger 431/168 2.507.006 5/1950 Hammell et all 239/2141? 3.811.818 5/1974 Miyahara 431/168 Primary E.raminerEdward G. Favors Attorney. Agent, or Fz'rmHill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson [57] ABSTRACT A liquid fuel burner in which a fuel gasifying member June 17, 1975 is mounted for rotation on the rotary shaft extending into the main body of the burner which is formed with a gas chamber along its inner periphery by mounting a combustion plate and an inner bottom wall there along. The fuel gasifying member is formed with an open end through which the fuel gasifying member communicates with the gas chamber, and a fuel supply member is mounted at the forward end portion of the rotary shaft to be disposed within the fuel gasifying member and in spaced juxtaposed relation to the substantially central portion of the inner surface of the closed end of the fuel gasifying member which is formed on its wall with a plurality of offset portions for promoting diffusion of liquid fuel by forming a perfect film on its wall. The gas chamber is formed in a suitable position with a narrowed portion to increase the rate of movement of gasified fuel therethrough. and at its forward end portion with a gas reservoir to ensure blowing of the gasified fuel in equal volumes through all the gasified fuel blowing openings formed in the combustion plate. A liquid fuel combustion initiation ignition plug and a gasified fuel combustion ini tiation ignition plug are provided separately and independently of each other, so that the initial state of combustion of the atomized liquid fuel can be automatically switched to the state of combustion of gasified fuel for sustained combustion of the gasified fuel.

PATENTEDJUN 17 1975 SHEET FIG.|

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009 000 5 00 ll IOOO 000 3 0000 W 000 $0000 OOQO 0000 M 2 PATENTEDJUH I 7 I975 SHEET FIG.

PATENTEDJUN 17 ms SHEET FIG.3

FIG.6

LIQUID FUEL BURNER FOR BURNING LIQUID FUEL IN GASIFIED FORM This invention relates to a novel, useful and improved liquid fuel burner which burnes liquid fuel, particularly kerosene and the like, by gasifying the same and which ensures sustained combustion of a mixture of gasified fuel and air.

I have previously developed a liquid fuel burner for burning liquid fuel in gasified form in which a fuel gasifying member is rotatably mounted at the central open end portion of the gas chamber formed along the inner periphery of the main body of the burner and made to communicate with the gas chamber while a fuel scattering gap is defined between the fuel gasifying member and the central open end portion of the gas chamber. In this type of burner, a supply of liquid fuel is blown in atomized particles into the main body of the burner by the fuel diffusing action of the fuel gasifying member and the fuel blowing action of a stream of air under pressure so that combustion of liquid fuel in atomized particles may be initiated and carried on in the main body of the burner, and the liquid fuel supplied is automatically gasified in the fuel gasifying member, so that the gasified fuel is delivered to the gas chamber by the stream of air under pressure after initiation of combustion of the gasified fuel. A mixture of gasified fuel and air is blown through a combustion plate attached to the gas chamber for sustained combustion.

The fuel gasifying member of the aforementioned type of liquid fuel burner adapted to cause the liquid fuel to diffuse and move uniformly along its surface by forming a thin film thereon is in cylindrical form, has a smooth inner surface on the wall and is made by means ofa press. With the fuel gasifying member ofthis construction, difficulty is experienced in causing the supplied liquid fuel to form a thin film on the inner surface of its wall as desired, because the fuel does not diffuse satisfactorily and becomes unbalanced in distribution during its movement or merely moves in sliding motion on the inner surface of the wall of the fuel gas ifying member. This makes it impossible to supply liquid fuel in atomized particles in sufficiently large quantities to enable ignition of liquid fuel to be initiated and carried on by blowing the liquid fuel in atomized particles into the main body of the burner and causing the same to scatter therein. This not only delays initiation of combustion but also prevents flames of uniform size from being produced in the main body of the burner due to uneven distribution of fuel. Particularly after initiation of combustion of liquid fuel in atomized particles, the supplied liquid fuel moves in particles along the inner surface of the wall of the fuel gasifying member without diffusing satisfactorily, thereby making it impossible to accomplish the object of vaporizing the liquid fuel in atomized particles into gasified form while the atomized fuel moves along the inner surface of the wall of the fuel gasifying member. Thus, completely automatic gasification of liquid fuel is prevented and nonvaporized fuel is produced and scattered into the main body of the burner, with the result that combustion of non-vaporized fuel produces red flames which are mixed with blue flames produced by combustion of vaporized or gasified fuel and makes it impossible to obtain perfect blue flames produced by combustion of the mixture of gasified fuel and air.

In the liquid fuel burner of the aforesaid construction, no means is provided for increasing the rate at which the mixture of gasified fuel and air is blown into the main body of the burner from the gas chamber which is formed, as aforementioned, along the inner periphery of the main body of the burner by mounting thereon in spaced relation a combustion plate formed therein with a multitude of gasified fuel blowing openings. As a result, the mixture of gasified fuel and air supplied under pressure to the gas chamber is blown in smaller quantities through the gasified fuel blowing openings disposed near the forward end of the gas chamber and larger quantities through the gasified fuel blowing openings disposed near the rearward end thereof. This makes it impossible to obtain ejection and combustion of the mixture of gasified fuel and air in uniform quantities through all the gasified fuel blowing openings which are formed and arranged in an orderly manner in the combustion plate.

Accordingly, a principal object of the invention is to provide a liquid fuel burner for burning liquid fuel in gasified form in which the liquid fuel, particularly kerosene and the like, supplied to the burner can be made quickly to diffuse and move by forming a thin film on the inner surface of the wall of the fuel gasifying member as the said gasifying member rotates, so that the liquid fuel can be positively converted into gasified form by the heating action of the flames produced by com bustion of the liquid fuel in atomized particles, and in which the liquid fuel gasified as aforesaid is mixed with a stream of air supplied under pressure to the gasifying member and the mixture is thoroughly agitated, so that the desired mixture of gasified fuel and air can be blown out of the gas chamber through the gasified fuel blowing openings formed in the combustion plate to ensure sustained combustion.

Another object of the invention is to provide a liquid fuel burner with burning liquid fuel in gasified form in which the wall of the fuel gasifying member adapted to rotate within the main body of the burner is formed therein with a plurality of offset portions for promoting diffusion of fuel. In this type of burner, the liquid fuel moving along the inner surface of the wall of the fuel gasifying member toward its open end portion can be made to impinge on the wall of the fuel gasifying member at such plurality of offset portions and its diffusion in atomized particles can be promoted. The diffusion of the liquid fuel in atomized particles caused by the impingement on the wall of the fuel gasifying member can be further promoted by the agitating action of the air supplied to the fuel gasifying member and caused to move in vortex form above the plurality of offset portions for promoting fuel diffusion. Thus the liquid fuel can be made to form a perfect film on the wall to achieve even distribution of fuel and facilitate ignition of liquid fuel in atomized particles. This ensures that gasified fuel is produced quickly and combustion of the mixture of gasified fuel and air in blue flames can be sustained.

Another object of the invention is to provide a liquid fuel burner with burning liquid fuel in gasified form which is capable of causing the mixture of gasified fuel and air formed in the fuel gasifying member to move at a sufficiently high rate of movement in the gas chamber to permit such mixture to be blown vigorously through the multitude of gasified fuel blowing openings, so that perfect combustion of gasified fuel can take place and back firing can be avoided even if the gasified fuel blowing openings have a relatively large diameter.

Still another object of the invention is to provide a liquid fuel burner with burning liquid fuel in gasifled form in which a narrowed or constricted gas passage is formed in the gas chamber by causing a portion of the wall of the main body and a portion of the inner bottom wall thereof to project toward each other so as to in crease the rate of movement of the mixture of gasified fuel and air passing therethrough, and in which a portion of the wall of the main body disposed in a position corresponding to the forward end portion of the gas chamber protrudes outwardly to provide a gas reservoir in the forward end portion of the gas chamber, whereby the mixture of gasified fuel and air introduced into the gas chamber under pressure can be vigorously blown through the gasified fuel blowing openings to burn uniformly through all the openings regardless of their positions.

Still another object of the invention is to provide a liquid fuel burner with burning a liquid fuel in gasified form which comprises a liquid fuel supply member disposed in close proximity to the inner surface of the closed end of the fuel gasifying member and formed at one side thereof and opposite to the closed and of the fuel gasifying member with an annular liquid fuel supply member in which the liquid fuel supply line opens and from which a plurality of tapering liquid fuel supply channels extend toward the inner surface of the closed end of the fuel gasifying member, so that the liquid fuel can be uniformly supplied to all the portions of the inner surface of the wall of the fuel gasifying member.

A further object of the invention is to provide a liquid fuel burner with burning liquid fuel in gasified form which comprises an ignition plug for initiating combustion of the atomized liquid fuel and an ignition plug for initiating combustion of the gasified fuel, such two ignition plugs being provided separately and independently of each other so that the initial state of combustion of the atomized liquid fuel can be positively and quickly switched to the state of combustion of the fuel in gasified form.

Additional and other objects and features of the in vention will become evident from the description set forth hereinafter when considered in conjunction with the accompanying drawings, in which:

FIG. 1 is a longitudinal sectional view, with certain parts being cutout, of the liquid fuel burner for burning liquid fuel in gasified form according to the invention;

FIG. 2 is a side view of the burner shown in FIG. I as seen from the left side;

FIG. 3 is a transverse sectional view taken along the line Ill-Ill of FIG. I;

FIG. 4 is a view in explanation of diffusion of fuel in the offset portions for promoting fuel diffusion along the inner wall surface of the fuel gasifying member;

FIG. 5 is a view in explanation of the air moving in vortex form above the offset portions for promoting fuel diffusion; and

FIG. 6 is a perspective view of the liquid fuel supply member as seen from the left side thereof.

A preferred emodiment of the invention will now be described with reference to the drawings in which like reference characters designate similar parts in all the drawings.

Referring to FIG. 1 and FIG. 2, l designates a main body made as of thin sheet iron and formed with a gas chamber 3 along its inner periphery. The gas chamber 3 is formed by mounting, along the inner periphery of the main body I in spaced relationship, an inner bottom wall 4 disposed on the bottom side of the main body 1 and a combustion plate 5 formed therein with a multitude of gasified fuel blowing openings 6 and diverging toward a flame blow-off nozzle 2 disposed at the open end of the main body 1. The inner bottom wall 4 is open substantially in the middle thereof to provide an open end portion 7 of the gas chamber 3.

Mounted to extend substantially right through the central portion of the main body I is a rotary shaft 8 which supports at its forward end a fuel gasifying member 9 adapted to perform the function of causing the liquid fuel supplied thereto to diffuse and move along the inner surface of its wall by forming a thin film of fuel thereon, so that the liquid fuel can be blown and scattered in atomized particles into the main body I to initiate combustion of the atomized liquid fuel. The fuel gasifying member 9 is also adapted to perform the function of vaporizing and gasifying the supplied liquid fuel while the fuel diffuses and moves along the inner surface of its wall after initiation of combustion of the atomized liquid fuel, and causing the gasified fuel to mix wall with a stream of air supplied under pressure so as to produce a mixture of gasified fuel and air. The fuel gasifying member 9 which is hollow and substantially frusto-conical in shape is open at one end at which the fuel gasifying member 9 is juxtaposed against the open end portion 7 of the gas chamber 3. The fuel gasifying member 9 is formed on its wall with a plurality of offset portions 10 for causing the liquid fuel to diffuse thereon.

The wall of the fuel gasifying member 9 curves outwardly at the open end portion thereof and has attached to its curved end portion a gas-air mixing plate 13 which forms a scattering gap 12 through the agency of a flow-down preventing member 11 in the form of a wire net mounted on the inner wall surface of the fuel gasifying member 9. The gasified fuel-air mixing plate 13 is joined to the fuel gasifying member 9 through the flow-down preventing member 11, by spot welding or the like at suitable intervals so as to have enough supply of gasified fuel at the open end portion of the fuel gasifying member 9. The gas-air mixing plate 13 performs the functions of causing liquid fuel to positively scatter in atomized particles through the scattering gap 12, causing a mixture of gasified fuel and air to be produced by mixing the gasified fuel with a stream of air under pressure and agitating the mixture, and preventing the mixture of gasified fuel and air from being inadvertently discharged through a cool air blowing gap 14 defined between the open end portion of the fuel gasifying member 9 and the open end portion 7 of the gas chamber 3.

A gas passageway 16 is formed in the central portion of the gas-air mixing plate 13 between said gas-air mixing plate 13 and an air supply duct 15 extending into the fuel gasifying member 9, so that the gasified fuel can be introduced smoothly into the gas chamber 3. A narrowed or constricted gas passage 17 is formed in a suitable position in the gas chamber 3 by causing a portion of the wall of the main body 1 and a portion of the inner bottom wall 4 to project toward each other. A gas reservoir 18 is formed in the forward end portion of the gas chamber 3 by causing a portion of the wall of the main body I to protrude outwardly.

l9 designates an air blowing chamber disposed around the central open end portion of the gas chamber 3 and communicating with the cool air blowing gap 14 through an air blowing port 20. A stream of cool air is blown through the cool air blowing gap 14 into the portion of the main body which is disposed above the inner bottom wall 4 to provide an air curtain thereon, thereby preventing the inner bottom wall 4 from damage owing to over heat by combustion which might otherwise be caused to the inner bottom wall 4 by the flames of combustion. The air blowing chamber 19 is maintained in communication with the air supply duct through an air supply cylinder 21 connected to the air supply duct 15.

22 designates a liquid fuel supply member mounted at the forward end portion of the rotary shaft 8 and disposed in close proximity to the substantially central portion of the inner surface of the closed end of the fuel gasifying member 9. The liquid fuel supply member 22 tapers toward the open end portion of the fuel gasifying member 9 and is provided with an annular liquid fuel supply chamber 23 at its minor diameter end. The liquid fuel supply member 22 is formed, as shown in FIG. 6, with a plurality of liquid fuel supply channels 24 connected at the bases to the liquid fuel supply chamber 23. The channels 24 extend radially in inclined positions from their bases and are disposed equidistantly from one another, so that their forward ends open and face the inner surface of the closed end of the fuel gasifying member 9 with a liquid fuel supply gap 25 being interposed therebetween so that the liquid fuel can be uniformly supplied to all the portion of the inner surface of the wall of the fuel gasifying member 9. At least one open end of a liquid fuel supply line 26 opens in the liquid fuel supply chamber 23.

27 is an ignition plug for initiating combustion of atomized liquid fuel scattered through the scattering gap 12. The atomized liquid fuel combustion initiating ignition plug 27 is directed toward the inner bottom wall 4 at the forward end.

28 is an ignition plug having a forward end disposed slightly above the scattering gap 12 for initiating combustion 0f the mixture of gasified fuel and air blown through the gasified fuel blowing openings 6.

29 is an air supply conduit which can be connected to the aforesaid air supply duct 15.

In operation, the rotary shaft 8 is rotated with all the parts being in the positions shown in FIG. 1 and FIG. 2. Rotation of the shaft 8 causes the fuel gasifying member 9 and the liquid fuel supply member 22 to rotate. On the other hand. liquid fuel is supplied through the liquid fuel supply line 26 to the liquid fuel supply chamber 23, and at the same time a stream of air supplied under pressure through the air supply conduit 29 and air supply duct 15 is blown into the fuel gasifying member 9. Whereupon the liquid fuel is supplied from the liquid fuel supply chamber 23 in equal quantities through the liquid fuel supply channels 24 and liquid fuel supply gap 25 toward the inner surface of the closed end of the fuel gasifying member 9. The liquid fuel thus directed against the inner surface of the closed end of the fuel gasifying member 9 is made to diffuse along the inner surface of the wall of the rotating fuel gasifying member 9 and moves toward the open end portion of the fuel gasifying member 9.

As aforesaid, a plurality of offset portions 10 for causing the liquid fuel to diffuse is formed on the wall of the fuel gasifying member 9. When the liquid fuel diffusing and moving along the inner wall surface of the fuel gasifying member 9 reaches the offset portions [0, the liquid fuel is thrown outwardly by centrifugal forces as shown in FIG. 4 and impinges on the inner surface of the wall of the fuel gasifying member 9, so that the liquid fuel is atomized into minuscule particles by impinging on the wall. Moreover, the liquid fuel turned into atomized particles in this way are agitated by the agitating action of the stream of air supplied under pressure to the fuel gasifying member 9 and caused to move in vortex form by impinging on the offset portions 10 as shown in FIG. 5, with the result that diffusion of the atomized fuel particles is promoted.

Combined with the action of the flow-down preventing member 11 to prevent flow-down of the liquid fuel and promoting its difiusion, the aforementioned actions of the offset portions 10 to cause the liquid fuel to impinge on the inner surface of the wall of the fuel gasifying member 9 and to cause the stream of air supplied under pressure to move in vortex form are effective to cause the liquid fuel to diffuse as desired on the inner surface of the wall of the fuel gasifying member 9, so that the atomized liquid fuel can form a perfect film on the wall in moving toward the open end portion of the fuel gasifying member 9. As a result, the liquid fuel scattered through the scattering gap 12 into the main body 1 is in atomized particles of uniform size, so that the atomized liquid fuel can be positively ignited by the atomized liquid fuel combustion initiating ignition plug 27 and combustion of the atomized liquid fuel can be positively initiated when the plug 27 is actuated. The flames produced by combustion of the atomized liquid fuel intensely heats the fuel gasifying member 9 as a whole.

Upon the fuel gasifying member 9 being heated by combustion of the atomized liquid fuel to a gasifying atmosphere temperature which is high enough to gasify the atomized liquid fuel, the atomized liquid fuel is immediately vaporized and gasified completely, because the diffusing liquid fuel is in a perfect film form at this time by virtue of the diffusing action of the centrifugal forces, the flow-down preventing action of the flowdown preventing member 11 the action of the offset portions 10 to cause the atomized liquid fuel to impinge on the inner surface of the wall of the fuel gasifying member 9 and the action of the offset portions 10 to cause air to move in vortex form and agitate the atomized liquid fuel. The gasified fuel is mixed with the stream of air under pressure by the gas-air mixing plate 13 into a perfect mixture of gasified fuel and air which is introduced under pressure into the gas chamber 3 through the open end portion 7.

Prior to the introduction of the mixture of gasified fuel and air into the portion of the gas chamber 3 in which the combustion plate 5 is disposed, the mixture passes through the constricted gas passage 17, so that the rate of movement of the mixture is increased. Thus, when the gas chamber 3 is filled with the mixture of gasified fuel and air, the mixture is vigorously blown through the multitude of gasified fuel blowing openings 6 and burns in blue flames without the danger of backfiring. The effect of the provision of the gas reservoir 18 at the forward end portion of the gas chamber 3 is to ensure that the mixture of gasified fuel and air can be blown in equal quantities through all the gasified fuel blowing openings 6 by eliminating the defect of the mixture being blown in smaller quantities through the openings 6 disposed at the forward end portion of the tapering gas chamber 3. Thus, the flames produced by combustion of the mixture of a gasified fuel and air can be emitted in vapors which diverge outwardly through the flame blowoff nozzle 2.

In the fuel burner constructed as aforementioned according to the invention, the liquid fuel supplied to the fuel gasifying member 9 rotating within the main body 1 of the burner is made to diffuse and move along the inner wall surface of the fuel gasifying member 9 by the centrifugal forces produced by the rotation of the fuel gasifying member 9 and by the blowing action of a stream of air under pressure. At the same time, diffusion of the liquid fuel is promoted by the action of the plurality of offset portions 10 to cause the liquid fuel to impinge on the inner surface of the wall of the fuel gasifying member 9 and become atomized, and the action thereof to cause the stream of air under pressure to move in vortex form so as to thereby agitate the diffusing atomized liquid fuel. In this way, the atomized liquid fuel can be made to form a perfect film on the inner surface of the wall of the member 9 as it moves therealong.

By virtue of this feature, the liquid fuel supplied to the fuel gasifying member 9 can be atomized into minuscule particles of uniform size when blown out of the fuel gasifying member 9 through the scattering gap 12 into the main body 1 of the burner toward the ignition plug 27, thereby ensuring quick initiation of combustion of the atomized liquid fuel. In addition, the provision of the gasified fuel combustion initiating ignition plug 28 permits the state of combustion of atomized liquid fuel to be automatically shifted to the state of combustion of gasified fuel, regardless of skill of the operator in handling the burner. Thus, combustion of the mixture of gasified fuel and air can be sustained for a long time.

I claim:

1. A liquid fuel burner for burning liquid fuel in gasified form comprising a main body made of thin sheet iron or the like, a gas chamber formed by mounting a combustion plate and an inner bottom wall along the inner periphery of the main body in spaced relationship, said combustion plate being formed therein with a multitude of gasified fuel blowing openings, a fuel gasifying member rotatably mounted within the main body, said fuel gasifying member being open at one end to communicate with said gas chamber and forming on its wall with a plurality of offset portions for promoting diffusion of the liquid fuel, a gas-air mixing plate mounted to the open end portion of said fuel gasifying member to define a scattering gap therebetween, and an air supply duct extending into the fuel gasifying member and opening therein.

2. A liquid fuel burner for burning liquid fuel in gasified form comprising a main body, a gas chamber formed by mounting a combustion plate and an inner bottom wall along the inner periphery of the main body in spaced relationship, said combustion plate being formed therein with a multitude of gasified fuel blowing openings, a narrowed portion formed in a suitable position in said gas chamber, and a gas reservoir formed at the forward end portion of the gas chamber by causing the forward end portion of the periphery of the main body to protrude outwardly.

3. A liquid fuel burner for burning liquid fuel in gasified form comprising a main body, a fuel gasifying member rotatably mounted within the main body, and a fuel supply member rotatably mounted at the forward end portion of a rotary shaft to rotate therewith as a unit, said fuel supply member being disposed in spaced juxtaposed relationship to the substantially central portion of the inner surface of the closed end of said fuel gasifying member and provided with a fuel supply chamber located opposite the closed end of the fuel gasifying member with respect to the fuel supply member, said fuel supply member being formed therein with a plurality of fuel supply channels and forming fuel supply gap with the closed end of the fuel gasifying member for supplying the liquid fuel from said fuel supply chamber and ejecting the same against the substantially central portion of the inner surface of the closed end of the fuel gasifying member.

4. A liquid fuel burner for burning liquid fuel in gasified form comprising a main body, a gas chamber formed by mounting a combustion plate and an inner bottom wall along the inner periphery of the main body in spaced relationship, said combustion plate being formed therein with a multitude of gasified fuel blowing openings, a fuel gasifying member rotatably mounted within said main body, said fuel gasifying member being capable of scattering in atomized particles into the main body the liquid fuel supplied thereto and also vaporizing and gasifying the liquid fuel, a liquid fuel combustion initiating ignition plug having a forward end disposed near the peripheral wall of the main body, and a gasified fuel combustion initiating ignition plug disposed in the neighborhood of the fuel gasifying member.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. 8, 890, 086 DATED J 7, 1975 INVENTOR(S) Kingo Miyahara It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below- Page 1, Foreign Application Priority Data, Delete "Aug. 22, 1974 japan 49-98433" and insert the following:

Aug. 22, 1973 Japan 98433/73 Dec. 29, 1973 Japan 287/74 April 1, 1974 Japan 37199/74 April 11, 1974 japan 41383/74 Signed and Scaled this sixteenth Day Of September 1975 [SEAL] A ttes t:

RUTH C. MASON Arresting Officer C. MARSHALL DANN Commissioner ufPatents and Trademarks