EP0286156A1 - Grate with pushers for the combustion of solid materials - Google Patents
Grate with pushers for the combustion of solid materials Download PDFInfo
- Publication number
- EP0286156A1 EP0286156A1 EP88200488A EP88200488A EP0286156A1 EP 0286156 A1 EP0286156 A1 EP 0286156A1 EP 88200488 A EP88200488 A EP 88200488A EP 88200488 A EP88200488 A EP 88200488A EP 0286156 A1 EP0286156 A1 EP 0286156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elements
- grate
- stationary
- moving
- pushers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H15/00—Cleaning arrangements for grates; Moving fuel along grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H1/00—Grates with solid bars
- F23H1/02—Grates with solid bars having provision for air supply or air preheating, e.g. air-supply or blast fittings which form a part of the grate structure or serve as supports
Definitions
- the present invention relates to a grate with pushers for the combustion of solid materials.
- the grate Besides performing the function of supporting and moving forwards the material treated, the grate must make it possible the combustion air to be injected, and at the same time carefully distributed, inside said material. This, in particular, for the purpose of preventing bridges or preferential chimneys, which cause an irregular combustion of the material, to form, causing localized temperature excesses (hot spots) to occur.
- the grates known from the prior art show furthermore faults due to the ease of occlusion of the air feed openings, to the penetration of dusts composed by fine material particles under the same grate, to the adhesion of low-melting metal materials and to the wear occurring in the moving and stationary components, caused by the operation type, and by the same structure thereof.
- a purpose of the present invention is to provide a grate with pushers capable of solving all of the above problems, while remaining extremely flexible as to its function, and able to treat solid material types of very different nature.
- a grate with pushers for the combustion of solid materials, in particular solid urban wastes, of the step type comprised stationary elements of box-like shape, for supporting the material, and moving elements performing the function of moving forwards the material to be treated, wherein the surface area in contact with said material of said stationary elements is considerably larger than that of said moving elements, inside said stationary elements a combustion air feed channel being provided for feeding the combustion air towards a hollow provided at the bottom on a front outwards-facing portion thereof, inside said hollow a complementary projection being slidingly guided, which is provided in an upper portion of said moving elements in such a way as to leave free, in its rest position, an opening acting as an outlet for said channel.
- the solid material is fed above a set of sectors 11 of grates with pushers having a structure according to the present invention.
- Each grate sector 11 is fed at its bottom with combustion air from a hopper 13 of its own, the flow rate of air streaming through which is adjustable according to as needed by the individual sector wherein a specific step of the incinerating or combustion process takes place.
- Said moving means are schematically shown in the form of a cylinder 14, e.g., an oleodynamic cylinder, fastened through a pin 15 onto a frame 16 of the incinerating furnace, said cylinder moving, by means of a stem 17, with the interposition of a bell crank 18 and of relevant guide rollers 19 ( Figure 2), a longitudinal support beam 20, with which the pusher elements 12 are integral.
- a cylinder 14 e.g., an oleodynamic cylinder
- each individual beam 22 and each step element 21 is accomplished by means of an end bar 23 which is engaged inside a perforated bracket 24, integral with the beam 22, and which receives bent, hook-like shaped portions 25 which extend downwards under the step element 21.
- the bent, hook-like shaped portions 25 extend, on their side close to the beam 22, into a further portion 27 having a length nearly equalling the width of the same beam, so to interact with an adjustment element 28, such as a screw, provided inside the beam 22, and which acts as a stop.
- an adjustment element 28 such as a screw, provided inside the beam 22, and which acts as a stop.
- the step element 21, of box-like shape is provided, in its interior, with a channel 29, defined by a wall 30 which runs parallelly to the outer profile of the same step element, and which contains in its interior a set of heat-diffusion fins 31, which extend downwards from said outer profile, parallelly to the direction of channel 29.
- Channel 29 extends up to come in the nearby of a flat portion 32, bent inwards from a front wall 40 of the step element 21 parallelly to the pusher element 12, which defines, with the wall 30, an opening 33 acting as an air outlet.
- the step element 21 is provided, in a central portion thereof, a hollow 34 capable of receiving, and allowing the sliding of, a projection 35 of complementary shape, provided above each pusher element 12.
- the projection 35 is provided only in an upper central portion of the pusher element 12, so to be aligned with the outlet opening 33, leaving it completely free when the pusher element is in its rest position.
- the pusher element 12 which too results to be of box-like shape, but of a height much lower than of the step element 21, has preferably a flattened parallelepipedal shape. At its bottom, it is provided with a flat front portion, bent rearwards, 41, which extends from a front wall 42 lined-up with the front wall 40 of the step element 21. In a rear portion thereof, the pusher element 12 is provided with portions bent to a hook-like shape 36, which engage themselves above an end bar 37 inserted inside a perforated bar 38 integral with the stationary beam 43 in a way analogous to the step element 21.
- the pusher element 12 is provided with a couple of appendices 39, whose bottom portion extends downwards inside the pusher element 12, said appendices 39 being parallel to the hook-like bent portions 36 and coming to position themselves on opposite sides relatively to the perforated bracket 38, so to keep the pusher element 12 centered.
- the hook-like bent portions 36 in correspondence of their side placed in the nearby of further beams 43 integral with the longitudinal support beam 20, extend into a further portion 44 which has a dimension larger than the width of the further beams 43, so to interact with an adjustment element 45, e.g., a screw element, positioned integral with the same beams 43, and acting as an adjustable stop element.
- an adjustment element 45 e.g., a screw element
- Both the pusher elements 12 and the step elements 21 are provided with perimetral undercuts or surmount elements 46 of complementary shape, capable of securing a tight sealing between the various elements, thus preventing undesired flows of air and dust materials.
- a shaped metal sheet 47 is provided for acting as a closure element; it, together with further closure elements 48, e.g., elastic metal sheet, or waterproof cloth, positioned between the beams 22 and the upper end portion of the step element 21 facing the same beams, secure the separation of the air streams fed to the individual sectors.
- closure elements 48 e.g., elastic metal sheet, or waterproof cloth
- the pusher elements 12 and the step elements 21, e.g., in a number of six, define a sector of treatment of the solid materials to be incinerated, wherein the pusher elements 12, supported by the beams 43 and by the beam 20, essentially perform the function of moving the material, whilst the step elements 21, integral with the beams 22, act as supports for the material.
- the step elements 21, which have a large surface area in contact with the material to be treated and the pusher elements 12 which, besides having a minimum surface area in contact with the material, in their rest position expose to said material only their small push surface area, and are hidden under the stationary elements 21.
- step element/pusher element assembly which in Figure 2 results inclined by 45° relatively to the support beam 20
- the geometry of the step element/pusher element assembly can be also varied according to other indications for the push angle defined between the same beam 20 and the direction of the pusher element.
- the particular canalization of the combustion air which licks up the whole surface of the step element 21, also thanks to the presence of the fins 31, suitably cools the same step element, and at the same time heats the combustion air improving the incinerating treatment.
- the channel 29 and the projection 35 make it also possible to control the flowrate of the combustion air.
- the projection 35 constitutes a rear closure element for the channel 29 when the pusher element 12 is in its rest position. It is thus evident how, by adjusting the position of the projection 35 relatively to the outlet opening 33, the amount of combustion air being fed can be varied as desired.
- a grate is thus obtained, which make it possible to change as desired the pressure drop occurring in the air stream, so that the distribution of air on the grate can be controlled mainly as a function of the geometry of the grate, rather than of the distribution of the solid material on the grate.
- the very important result is achieved of having very high pressure drops also in the presence of small air flowrates under the grate, thus the air waste being avoided, which is caused by the forming of preferential chimneys, above all when the combustion requires low thicknesses of materials to be incinerated on the grate.
- Another function of paramount importance of the projection 35 is that of keeping clean the outlet opening 33 of the channel 29, as well as the hollow 34, securing the flow of air, and at the same time generating a compact and powerful air jet.
- Furtnermore, the projection 35 is of such a length as to prevent material from being entrained into the inside of the channel 29 during the movement of return of the pusher element 12.
- the function of the projection 35 as an element for stopping the flow of air coming through the channel 29 during the operative movement of the pusher element 12 for moving the solid material to be incinerated.
- This positioning offers the advantage of not causing flames to be generated in the nearby of the metal parts constituting the grate, which result hence protected exactly by the same solid material which is being treated.
- the pusher element 12 positioned nearly in correspondence with the end surfaces of the two step elements between which it is comprised, shows a small surface area of sliding contact and friction on the same step element, so that both the elements 12 and 21 undergo a lower wear.
- molten masses occur often, which adhere to the stationary elements 21 supporting surfaces. These molten masses, which result in the formation of nodules strongly adherent to the plates, disturb, or even sometimes prevent the regular movement of the movable elements 12.
- a projection 55 ( Figure 5) is provided, which protrudes outwards, frontally, and atop, from the stationary element 21, so that, thanks to such a shaping of the stationary element 21, the moving pusher element 12 moves forwards in a cantilevering position in the material, so to prevent such a drawback.
- pusher element 12 can act on a layer of solid material to be treated larger than that treated by the grate as shown in Figures from 2 to 4, by protruding from two consecutive step elements by a considerable length, in its extracted pushing position.
- the opening cross surface area of the hollow 34 can be limited by means of shimming elements 51 to be integrally positioned above the underlying pusher elements 12 in the free area in front of the projection 35, so to keep constant the outflow speed, also in grate sections with reduced air flowrates.
- the stationary elements 21 can be preferably provided with appendices 27, as shown in Figure 3, whilst for the moving pusher elements 12, the limitation of the angular movement on the vertical plane, whose adjustment takes place during the assemblage step, is achieved by means of two rear appendices 36 which come to stop against a side of beam 43.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Housing For Livestock And Birds (AREA)
- Fertilizers (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Catalysts (AREA)
- Baking, Grill, Roasting (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Description
- The present invention relates to a grate with pushers for the combustion of solid materials.
- It is known that the grates for the combustion of solid materials, in particular, e.g., solid town wastes, have, above all, the function of supporting and moving the materials to be treated which, from the inlet end up to the outlet end of the same grate lose their combustible portion.
- Besides performing the function of supporting and moving forwards the material treated, the grate must make it possible the combustion air to be injected, and at the same time carefully distributed, inside said material. This, in particular, for the purpose of preventing bridges or preferential chimneys, which cause an irregular combustion of the material, to form, causing localized temperature excesses (hot spots) to occur.
- The grates known from the prior art show furthermore faults due to the ease of occlusion of the air feed openings, to the penetration of dusts composed by fine material particles under the same grate, to the adhesion of low-melting metal materials and to the wear occurring in the moving and stationary components, caused by the operation type, and by the same structure thereof.
- A purpose of the present invention is to provide a grate with pushers capable of solving all of the above problems, while remaining extremely flexible as to its function, and able to treat solid material types of very different nature.
- These purposes according to the present invention are achieved by providing a grate with pushers for the combustion of solid materials, in particular solid urban wastes, of the step type, comprised stationary elements of box-like shape, for supporting the material, and moving elements performing the function of moving forwards the material to be treated, wherein the surface area in contact with said material of said stationary elements is considerably larger than that of said moving elements, inside said stationary elements a combustion air feed channel being provided for feeding the combustion air towards a hollow provided at the bottom on a front outwards-facing portion thereof, inside said hollow a complementary projection being slidingly guided, which is provided in an upper portion of said moving elements in such a way as to leave free, in its rest position, an opening acting as an outlet for said channel.
- A grate with pushers according to the present invention, its construction and its assemblage, together with the characteristics and advantages thereof are better understood from the following exemplifying and non-limitative disclosure, referred to the related schematic drawings, wherein:
- Figure 1 shows an elevation wiew of a group of some grate sectors according to the invention in an incinerating furnace;
- Figure 2 shows an enlarged, partially sectional view of a sector of the grate of Figure 1,
- Figure 3 shows a partially sectional view of a detail of the grate of Figure 2, in a rotated position,
- Figure 4 shows a sectional view according to path IV-IV of Figure 3,
- Figure 5 shows a partially sectional view of a detail of a further form of practical embodiment of a grate according to the invention, and
- Figure 6 shows a partially sectional front view according to
arrow 6 of Figure 5. - Referring to Figure 1, the solid material is fed above a set of
sectors 11 of grates with pushers having a structure according to the present invention. - Each
grate sector 11 is fed at its bottom with combustion air from ahopper 13 of its own, the flow rate of air streaming through which is adjustable according to as needed by the individual sector wherein a specific step of the incinerating or combustion process takes place. - In Figure 1, the means are furthermore shown, which are provided for the purpose of moving the whole of
movable pusher elements 12 of eachindividual sector 11, interposed and alternated with asmany step elements 21 also denominated stationary elements. - Said moving means are schematically shown in the form of a
cylinder 14, e.g., an oleodynamic cylinder, fastened through apin 15 onto aframe 16 of the incinerating furnace, said cylinder moving, by means of astem 17, with the interposition of abell crank 18 and of relevant guide rollers 19 (Figure 2), alongitudinal support beam 20, with which thepusher elements 12 are integral. - Specifically referring now to Figures 2, 3 and 4, the elements composing the grate with pushers are shown in greater detail. In particular, as already said, on the
frame 16 inside eachindividual sector 11, an equal number ofstationary step elements 21 are positioned on each one of a plurality ofstationart beams 22, transversal relatively to the travelling direction of the material, and essentially parallel to the upper surface of the grate. - The connection between each
individual beam 22 and eachstep element 21 is accomplished by means of anend bar 23 which is engaged inside aperforated bracket 24, integral with thebeam 22, and which receives bent, hook-likeshaped portions 25 which extend downwards under thestep element 21. - A couple of
appendices 26 too extend under thestep element 21 in a central portion thereof, so as to come to place themselves on opposite sides relatively to theperforated bracket 24, thus acting as centering members. - The bent, hook-like
shaped portions 25 extend, on their side close to thebeam 22, into afurther portion 27 having a length nearly equalling the width of the same beam, so to interact with anadjustment element 28, such as a screw, provided inside thebeam 22, and which acts as a stop. By adjusting the position of theelement 28, thestationary element 21 can be kept in a cantilevering position, or, on the contrary, it can rest onpusher 12. - The
step element 21, of box-like shape, is provided, in its interior, with achannel 29, defined by awall 30 which runs parallelly to the outer profile of the same step element, and which contains in its interior a set of heat-diffusion fins 31, which extend downwards from said outer profile, parallelly to the direction ofchannel 29. - Channel 29 extends up to come in the nearby of a
flat portion 32, bent inwards from afront wall 40 of thestep element 21 parallelly to thepusher element 12, which defines, with thewall 30, an opening 33 acting as an air outlet. - In its front face, the
step element 21 is provided, in a central portion thereof, a hollow 34 capable of receiving, and allowing the sliding of, aprojection 35 of complementary shape, provided above eachpusher element 12. - More precisely, the
projection 35 is provided only in an upper central portion of thepusher element 12, so to be aligned with the outlet opening 33, leaving it completely free when the pusher element is in its rest position. - The
pusher element 12, which too results to be of box-like shape, but of a height much lower than of thestep element 21, has preferably a flattened parallelepipedal shape. At its bottom, it is provided with a flat front portion, bent rearwards, 41, which extends from afront wall 42 lined-up with thefront wall 40 of thestep element 21. In a rear portion thereof, thepusher element 12 is provided with portions bent to a hook-like shape 36, which engage themselves above anend bar 37 inserted inside a perforatedbar 38 integral with thestationary beam 43 in a way analogous to thestep element 21. - Also the
pusher element 12 is provided with a couple ofappendices 39, whose bottom portion extends downwards inside thepusher element 12, saidappendices 39 being parallel to the hook-like bent portions 36 and coming to position themselves on opposite sides relatively to theperforated bracket 38, so to keep thepusher element 12 centered. - The hook-
like bent portions 36, in correspondence of their side placed in the nearby offurther beams 43 integral with thelongitudinal support beam 20, extend into afurther portion 44 which has a dimension larger than the width of thefurther beams 43, so to interact with anadjustment element 45, e.g., a screw element, positioned integral with thesame beams 43, and acting as an adjustable stop element. - The presence of the
adjustment elements step elements 21, and of thepusher elements 12, allows the sliding interaction between them to be reduced, and discharges their weight directly onto thebeams - Both the
pusher elements 12 and thestep elements 21 are provided with perimetral undercuts orsurmount elements 46 of complementary shape, capable of securing a tight sealing between the various elements, thus preventing undesired flows of air and dust materials. - In the nearby of the
step elements 21 positioned at the beginning and at the end of eachindividual sector 11, ashaped metal sheet 47 is provided for acting as a closure element; it, together withfurther closure elements 48, e.g., elastic metal sheet, or waterproof cloth, positioned between thebeams 22 and the upper end portion of thestep element 21 facing the same beams, secure the separation of the air streams fed to the individual sectors. - As shown in Figure 2, the
pusher elements 12 and thestep elements 21, e.g., in a number of six, define a sector of treatment of the solid materials to be incinerated, wherein thepusher elements 12, supported by thebeams 43 and by thebeam 20, essentially perform the function of moving the material, whilst thestep elements 21, integral with thebeams 22, act as supports for the material. In this way, a clear functional distinction is evidenced between thestep elements 21, which have a large surface area in contact with the material to be treated, and thepusher elements 12 which, besides having a minimum surface area in contact with the material, in their rest position expose to said material only their small push surface area, and are hidden under thestationary elements 21. - The geometry of the step element/pusher element assembly, which in Figure 2 results inclined by 45° relatively to the
support beam 20, can be also varied according to other indications for the push angle defined between thesame beam 20 and the direction of the pusher element. - The particular canalization of the combustion air, which licks up the whole surface of the
step element 21, also thanks to the presence of thefins 31, suitably cools the same step element, and at the same time heats the combustion air improving the incinerating treatment. - The
channel 29 and theprojection 35 make it also possible to control the flowrate of the combustion air. - It must be observed in fact how the
projection 35 constitutes a rear closure element for thechannel 29 when thepusher element 12 is in its rest position. It is thus evident how, by adjusting the position of theprojection 35 relatively to the outlet opening 33, the amount of combustion air being fed can be varied as desired. - A grate is thus obtained, which make it possible to change as desired the pressure drop occurring in the air stream, so that the distribution of air on the grate can be controlled mainly as a function of the geometry of the grate, rather than of the distribution of the solid material on the grate. Thus, the very important result is achieved of having very high pressure drops also in the presence of small air flowrates under the grate, thus the air waste being avoided, which is caused by the forming of preferential chimneys, above all when the combustion requires low thicknesses of materials to be incinerated on the grate.
- Another function of paramount importance of the
projection 35 is that of keeping clean the outlet opening 33 of thechannel 29, as well as the hollow 34, securing the flow of air, and at the same time generating a compact and powerful air jet. - Furtnermore, the
projection 35, as said, is of such a length as to prevent material from being entrained into the inside of thechannel 29 during the movement of return of thepusher element 12. - Of not lesser importance is the function of the
projection 35 as an element for stopping the flow of air coming through thechannel 29 during the operative movement of thepusher element 12 for moving the solid material to be incinerated. - In fact, such a material generally occurs as a dust, and the air flow during the movement tends to cause the raising of a considerable dust amount.
- The position of the jet of combustion air defined by each
individual step element 21 and by therelated pusher element 12 in its rest position is furthermore detached and raised relatively to the followingstep element 21. - This positioning offers the advantage of not causing flames to be generated in the nearby of the metal parts constituting the grate, which result hence protected exactly by the same solid material which is being treated.
- Referring on the contrary to Figures 5 and 6, one can observe how this further practical embodiment, applying the same innovative concept of the invention used in the grate of the first example, limits the outer surface of the
stationary step element 21 in contact with, and supporting, the solid material being treated. - On the contrary, the
pusher element 12 positioned nearly in correspondence with the end surfaces of the two step elements between which it is comprised, shows a small surface area of sliding contact and friction on the same step element, so that both theelements - During the combustion of materials containing low-melting metals, molten masses occur often, which adhere to the
stationary elements 21 supporting surfaces. These molten masses, which result in the formation of nodules strongly adherent to the plates, disturb, or even sometimes prevent the regular movement of themovable elements 12. For that purpose, a projection 55 (Figure 5) is provided, which protrudes outwards, frontally, and atop, from thestationary element 21, so that, thanks to such a shaping of thestationary element 21, the movingpusher element 12 moves forwards in a cantilevering position in the material, so to prevent such a drawback. - One can furthermore observe how the
pusher element 12 can act on a layer of solid material to be treated larger than that treated by the grate as shown in Figures from 2 to 4, by protruding from two consecutive step elements by a considerable length, in its extracted pushing position. - For the sake of simplicity, the component elements common to the two examples have been indicated with the same reference numerals.
- One can observe how the
surmount elements 46 of the practical embodiment of Figure 4 show, in the example shown in Figure 6,hollows 49 and complementary projectingportions 50 which engage with each other in adjacent and coupledstep elements 21 andpusher elements 12, thus securing an optimum tightness for air and possible material penetrations. For the purpose of improving the tightness, inside the hollows 49 a gasket (not shown) can be applied. - One should furthermore observe how the
front wall 40 has an extremely small surface area, and how the elimination of the inwards-bentflat portion 32 connects thechannel 29 directly with the hollow 34, so to accomplish a more immediate air exiting. - The opening cross surface area of the hollow 34 can be limited by means of
shimming elements 51 to be integrally positioned above theunderlying pusher elements 12 in the free area in front of theprojection 35, so to keep constant the outflow speed, also in grate sections with reduced air flowrates. - Also for the further practical embodiment of the grate of the present invention, the
stationary elements 21 can be preferably provided withappendices 27, as shown in Figure 3, whilst for the movingpusher elements 12, the limitation of the angular movement on the vertical plane, whose adjustment takes place during the assemblage step, is achieved by means of tworear appendices 36 which come to stop against a side ofbeam 43.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88200488T ATE63785T1 (en) | 1987-03-24 | 1988-03-17 | GRILL WITH Plunger FOR COMBUSTION OF SOLIDS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1981987 | 1987-03-24 | ||
IT19819/87A IT1202677B (en) | 1987-03-24 | 1987-03-24 | PUSHING GRID FOR COMBUSTION OF SOLID MATERIALS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0286156A1 true EP0286156A1 (en) | 1988-10-12 |
EP0286156B1 EP0286156B1 (en) | 1991-05-22 |
Family
ID=11161539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88200488A Expired - Lifetime EP0286156B1 (en) | 1987-03-24 | 1988-03-17 | Grate with pushers for the combustion of solid materials |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0286156B1 (en) |
AT (1) | ATE63785T1 (en) |
DE (1) | DE3862888D1 (en) |
ES (1) | ES2022591B3 (en) |
GR (1) | GR3002314T3 (en) |
IT (1) | IT1202677B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5323717A (en) * | 1992-12-04 | 1994-06-28 | Leon Industries, Inc. | Refuse feed assembly for incinerators |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB164914A (en) * | 1920-04-14 | 1921-06-23 | Joseph Martin | An improved method and apparatus for burning solid fuels |
-
1987
- 1987-03-24 IT IT19819/87A patent/IT1202677B/en active
-
1988
- 1988-03-17 ES ES88200488T patent/ES2022591B3/en not_active Expired - Lifetime
- 1988-03-17 EP EP88200488A patent/EP0286156B1/en not_active Expired - Lifetime
- 1988-03-17 DE DE8888200488T patent/DE3862888D1/en not_active Expired - Fee Related
- 1988-03-17 AT AT88200488T patent/ATE63785T1/en not_active IP Right Cessation
-
1991
- 1991-07-15 GR GR91401019T patent/GR3002314T3/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB164914A (en) * | 1920-04-14 | 1921-06-23 | Joseph Martin | An improved method and apparatus for burning solid fuels |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5323717A (en) * | 1992-12-04 | 1994-06-28 | Leon Industries, Inc. | Refuse feed assembly for incinerators |
Also Published As
Publication number | Publication date |
---|---|
GR3002314T3 (en) | 1992-12-30 |
ATE63785T1 (en) | 1991-06-15 |
EP0286156B1 (en) | 1991-05-22 |
ES2022591B3 (en) | 1991-12-01 |
IT8719819A0 (en) | 1987-03-24 |
DE3862888D1 (en) | 1991-06-27 |
IT1202677B (en) | 1989-02-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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