CA1319303C - Hearth comprising a device for heat recuperation - Google Patents
Hearth comprising a device for heat recuperationInfo
- Publication number
- CA1319303C CA1319303C CA000582290A CA582290A CA1319303C CA 1319303 C CA1319303 C CA 1319303C CA 000582290 A CA000582290 A CA 000582290A CA 582290 A CA582290 A CA 582290A CA 1319303 C CA1319303 C CA 1319303C
- Authority
- CA
- Canada
- Prior art keywords
- hearth
- enclosure
- flue gas
- pipes
- recuperation
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B7/00—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating
- F24B7/02—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating with external air ducts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
- F24B1/188—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas
- F24B1/1885—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas the heat exchange medium being air only
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Solid-Fuel Combustion (AREA)
- Incineration Of Waste (AREA)
- Combustion Of Fluid Fuel (AREA)
- Coating Apparatus (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
ABSTRACT
" Hearth comprising a device for heat recuperation".
A hearth comprising a device for recuperation of heat contained in flue gas generated by combustion of a fuel such as for example wood, said recuperation device being disposed inside an enclosure formed i.a. of two side walls, a back wall and a front wall comprising a loading entrance. Said recuperation device comprises a set of pipes collecting the flue gas in the neighborhood of the back wall and in an upper part of said enclosure in order to lead the flue gas to said front part and to lead it thereafter to an upper part of said enclosure in order to penetrate into a horizontal chamber situated in the upper part of the enclosure.
" Hearth comprising a device for heat recuperation".
A hearth comprising a device for recuperation of heat contained in flue gas generated by combustion of a fuel such as for example wood, said recuperation device being disposed inside an enclosure formed i.a. of two side walls, a back wall and a front wall comprising a loading entrance. Said recuperation device comprises a set of pipes collecting the flue gas in the neighborhood of the back wall and in an upper part of said enclosure in order to lead the flue gas to said front part and to lead it thereafter to an upper part of said enclosure in order to penetrate into a horizontal chamber situated in the upper part of the enclosure.
Description
- l ~ 31 93~3 "Hearth comprising a device for heat ~ecuperation".
The present invention relates to a hearth comprising a device for recuperation of heat contained in flue gas generated by combustion of a fuel such as for example, but non-exclusively, wood, said recuperation device being disposed inside an enclosure formed i._. of two side walls, a back wall and a front wall comprising an entrance for inputting said fuel.
Several attempts have already been made for recu-perating heat comprised in the flue gas generated by a hearth. So primitive concep ts and highly sophisticated solutions have been elabo-rated which unfortunately did not provide a satisfactory solution.
The old stoves are for example known, of which the exhaust pipe crossed, nearly horizontally, the room to be heated.
This allows a good dispersion, by simple convection, of the calories contairled in the flue gas. It is good to mention that this use has disappeared for aesthetical and security reasons. The use of wood, as such, for fuel presented a certain danger due to the fact of a tarry creosote settling in the conduct or exhaust pipe. That tarry creasote settling is nowadays still the reason of a lot of chimney fires and results from two well known situations: on the one hand 2 0 an insufficiently high input temperature of the flue gas into the chimney (the ideal temperature would be approximately 200C), and on the other hand, a flue gas which is to much charged with creosote resulting from an insufficient combustion due to a lack of primary air necessary to the combustion. In the latest case, where those two 2 5 phenomenons are combined, there is a condensation in the chimney conducts and thus a settling of tarry creosote in the conducts.
An improved realization wherein an attempt is made in order to recover the caloriesj is provided by the so-called stoves with a recuperator which comprise, above the heating body, ~' 13193~3 closed spaces, with diminishing dimensions or not, in such a manner that the flue gas is brought to travel through the longest possible way in order to abandon the calories it comprises into the room to be heated. The drawback of that system, beside the cumbersomeness it supposes, is that the draught (or suction of the smoke) is often insufficient and that the slip-stream created into chose "calories recuperation boxes" leads to the same drawbacks caused by said tarry creosote settlings which have already been mentioned hereabove.
A lot of other systems, called "turbo" or "catalytic"
are also known. Another already tested out solution consists of the mounting at the back side of the heating body of a combustion stage provided for burning the combustion elements still contained in the flue gas, by bringing them into contact with oxygen heated before and to which a chemical catalytic agent has been added. The combus-tion realised at such a place has for consequence that the flue gas which are rid of of most of their creosote, travels a way of some then centimeters (in function of the circumstances) before they flow into the chimney. That recuperation principle has to be considered as being more saEely and as being the most performant at the present 2 0 time.
An object of the invention is to cope with the draw-backs of which the principles have been mentioned hereabove and to provide a perfectly acceptable solution to the problems caused by the recuperation of flue gas in hearths of the considered type.
2 5 According to the invention that object is achieved in that said recuperation device comprises a se t of pipes collecting the flue gas in the neighbourhood of the back wall and in an upper-part of said enclosure in order to lead the flue gas to said front wall and to lead it thereafter to an upperpart of said enclosure in order to penetrate into a hori~ontal chamber situated in the upper-part of the enclosure from which the flue ~as is evacuated by means of a socket coupling to a chimney.
In a first embodiment, said set of pipes consists of two pipes each having an input aperture for inputting said flue gas and wherein each pipe comprises at an upperpart a first pipe, l31.~3~
said first pipe being thereafter extended by a second pipe which cross said enclosure starting from the back wall and extending towards the front wall for extending thereafter towards the upper part by means of a third pipe and penetrating into said horizontal chamber.
In another embodiment which can be considered as an alternatiE solution, said set of pipes consists of a set of deflec-tors which direct the flue gas between two lateral walls starting from an input aperture of the flue gas, which aperture is disposed at the upper part of said pipes, said deflectors issue forth at their upper part in said horizontal chamber.
According to a remarkable characteristic of the invention, said enclosure which is provided for receiving said device comprises at its under part a first aperture for inputting ambient air and, at its upper part, a second aperture, provided in a further horizontal chamber of said hearth and through which the air heated between the walls of the enclosure and the back wall of said device is returned outside said hearth.
Other details and advantages of the invention will become clear Irom the description which will be given hereafter 2 0 and which relates to a hearth comprising a recuperation device for recuperating the heat contained in the flue gas.
The description is only given by way of an example and does not limit the invention. The references relates to the accom-pagning drawings.
Figure I is a perspective view oE a hearth according to the invention, showing partially the recuperation device according to the invention.
Figure 2 is an analogous view to the one given in figure 1, but showing only the device for recuperating the heat comprised in the flue gas generated by the combustion of a fuel.
Figure 1 shows a hearth, given by way of example only, which comprises side walls 1, a back wall, which can not be seen in the drawing, and a front wall 2 having an entrance 3 for inputting a fuel. Beside the fact that the hearth according to the invention comprises also importan t details which will be considered hereafter, it has to be considered that the main improvements tending to obtain an as total as possible recuperation of the heat comprised in the flue gas, consist in providing a set of pipes which collect the flue gas in the neighbourhood of the back wall of the hearth. In fact, the device comprises two pipes 4', 5' each having a flue gas input aperture 6, 7 which is situated at the upper and back side of the enclosure of the hearth. Both pipes comprise a first part 4', 5' exten-ding towards the under side and show then a horizontal second part 4", 5" which is directed towards the front of the hearth and commu-nicates with a third part 4"', 5"' which is vertically disposed and which issues forth at its top in a horizontal chamber 8 extending nearly over the whole upper surface of the enclosure. That chamber 8 communicates with a chimney 9.
It can thus be seen that the flue gas exhausted by the combustion inside the enclosure is forced to circulate along the longest possible track inside that enclosure.
The object of the device is to take away the largest possible part of the calories which are produced by any kind of combus-tion and by conserving the minimal temperature for the flue gas, either or not filtered, at its entry into the chimney thus avoiding the well known condensation phenomenon.
In an embocliment which is formally claimed, the set of pipes 4, 5 can be replaced by a set of deflectors which lead the flue gas starting from an input towarcls an output which puts that set of deflectors into communication whith the horizontal chamber 8. In that case, the hot gas circulates lateraly over large surfaces, which is an object of the invention.
In figure 2 i t can be seen that the vertical pipes 4', 5' are fixed at a wall 10 which is part of the device and which extends until a sole 11 which can be constituted of a refractory material or of a metal sheet.
The hearth according to the invention comprises at its under and front part an input aperture 12 through which the ambient air penetrates. That aperture 12 creates, under the sole 11, a space 13 which comrnunicates, by means of the vertical space ~3~o~
situated beyond the wall 10, with a second horizon tal chamber 14 situated at the upper part of the device. That second horizontal chamber 14 comprises an aperture 15 through which the heated air escapes.
It will be evident that the ambient air circulation in that second circuit can be realised by a f an sucking or driving back the air des-tinated to circulate in that circuit.
From the description of a hearth comprising a recu-peration device according to the invention clearly results that the set of pipes 4, 5 constitu tes the longest possible way that can be imposed on the flue gas of which the calories has to be recuperated.
A very big advantage has to be seen in the fact that the parts which are the most exposed to a high heating are situated at the back of the hearth in such a manner that one has no longer to be afraid from an excessif heating of the front wall and of the loadin~ input of the hearth. This is indeed a very important object of the invention.
It will also be clear that all other modifications of the profile of the pipes can be provided in order to give them a path which is as long as possible and in order to recuperate a maximum of calories thereof.
2 0 It is of course also possible to modify the path to which the ambient air is subjected when it is passing through the hearth, but it also clear that the choice of the components as des-cribed in the present application constitu tes an optimal solution to the problems mentioned in the preamble.
The present invention relates to a hearth comprising a device for recuperation of heat contained in flue gas generated by combustion of a fuel such as for example, but non-exclusively, wood, said recuperation device being disposed inside an enclosure formed i._. of two side walls, a back wall and a front wall comprising an entrance for inputting said fuel.
Several attempts have already been made for recu-perating heat comprised in the flue gas generated by a hearth. So primitive concep ts and highly sophisticated solutions have been elabo-rated which unfortunately did not provide a satisfactory solution.
The old stoves are for example known, of which the exhaust pipe crossed, nearly horizontally, the room to be heated.
This allows a good dispersion, by simple convection, of the calories contairled in the flue gas. It is good to mention that this use has disappeared for aesthetical and security reasons. The use of wood, as such, for fuel presented a certain danger due to the fact of a tarry creosote settling in the conduct or exhaust pipe. That tarry creasote settling is nowadays still the reason of a lot of chimney fires and results from two well known situations: on the one hand 2 0 an insufficiently high input temperature of the flue gas into the chimney (the ideal temperature would be approximately 200C), and on the other hand, a flue gas which is to much charged with creosote resulting from an insufficient combustion due to a lack of primary air necessary to the combustion. In the latest case, where those two 2 5 phenomenons are combined, there is a condensation in the chimney conducts and thus a settling of tarry creosote in the conducts.
An improved realization wherein an attempt is made in order to recover the caloriesj is provided by the so-called stoves with a recuperator which comprise, above the heating body, ~' 13193~3 closed spaces, with diminishing dimensions or not, in such a manner that the flue gas is brought to travel through the longest possible way in order to abandon the calories it comprises into the room to be heated. The drawback of that system, beside the cumbersomeness it supposes, is that the draught (or suction of the smoke) is often insufficient and that the slip-stream created into chose "calories recuperation boxes" leads to the same drawbacks caused by said tarry creosote settlings which have already been mentioned hereabove.
A lot of other systems, called "turbo" or "catalytic"
are also known. Another already tested out solution consists of the mounting at the back side of the heating body of a combustion stage provided for burning the combustion elements still contained in the flue gas, by bringing them into contact with oxygen heated before and to which a chemical catalytic agent has been added. The combus-tion realised at such a place has for consequence that the flue gas which are rid of of most of their creosote, travels a way of some then centimeters (in function of the circumstances) before they flow into the chimney. That recuperation principle has to be considered as being more saEely and as being the most performant at the present 2 0 time.
An object of the invention is to cope with the draw-backs of which the principles have been mentioned hereabove and to provide a perfectly acceptable solution to the problems caused by the recuperation of flue gas in hearths of the considered type.
2 5 According to the invention that object is achieved in that said recuperation device comprises a se t of pipes collecting the flue gas in the neighbourhood of the back wall and in an upper-part of said enclosure in order to lead the flue gas to said front wall and to lead it thereafter to an upperpart of said enclosure in order to penetrate into a hori~ontal chamber situated in the upper-part of the enclosure from which the flue ~as is evacuated by means of a socket coupling to a chimney.
In a first embodiment, said set of pipes consists of two pipes each having an input aperture for inputting said flue gas and wherein each pipe comprises at an upperpart a first pipe, l31.~3~
said first pipe being thereafter extended by a second pipe which cross said enclosure starting from the back wall and extending towards the front wall for extending thereafter towards the upper part by means of a third pipe and penetrating into said horizontal chamber.
In another embodiment which can be considered as an alternatiE solution, said set of pipes consists of a set of deflec-tors which direct the flue gas between two lateral walls starting from an input aperture of the flue gas, which aperture is disposed at the upper part of said pipes, said deflectors issue forth at their upper part in said horizontal chamber.
According to a remarkable characteristic of the invention, said enclosure which is provided for receiving said device comprises at its under part a first aperture for inputting ambient air and, at its upper part, a second aperture, provided in a further horizontal chamber of said hearth and through which the air heated between the walls of the enclosure and the back wall of said device is returned outside said hearth.
Other details and advantages of the invention will become clear Irom the description which will be given hereafter 2 0 and which relates to a hearth comprising a recuperation device for recuperating the heat contained in the flue gas.
The description is only given by way of an example and does not limit the invention. The references relates to the accom-pagning drawings.
Figure I is a perspective view oE a hearth according to the invention, showing partially the recuperation device according to the invention.
Figure 2 is an analogous view to the one given in figure 1, but showing only the device for recuperating the heat comprised in the flue gas generated by the combustion of a fuel.
Figure 1 shows a hearth, given by way of example only, which comprises side walls 1, a back wall, which can not be seen in the drawing, and a front wall 2 having an entrance 3 for inputting a fuel. Beside the fact that the hearth according to the invention comprises also importan t details which will be considered hereafter, it has to be considered that the main improvements tending to obtain an as total as possible recuperation of the heat comprised in the flue gas, consist in providing a set of pipes which collect the flue gas in the neighbourhood of the back wall of the hearth. In fact, the device comprises two pipes 4', 5' each having a flue gas input aperture 6, 7 which is situated at the upper and back side of the enclosure of the hearth. Both pipes comprise a first part 4', 5' exten-ding towards the under side and show then a horizontal second part 4", 5" which is directed towards the front of the hearth and commu-nicates with a third part 4"', 5"' which is vertically disposed and which issues forth at its top in a horizontal chamber 8 extending nearly over the whole upper surface of the enclosure. That chamber 8 communicates with a chimney 9.
It can thus be seen that the flue gas exhausted by the combustion inside the enclosure is forced to circulate along the longest possible track inside that enclosure.
The object of the device is to take away the largest possible part of the calories which are produced by any kind of combus-tion and by conserving the minimal temperature for the flue gas, either or not filtered, at its entry into the chimney thus avoiding the well known condensation phenomenon.
In an embocliment which is formally claimed, the set of pipes 4, 5 can be replaced by a set of deflectors which lead the flue gas starting from an input towarcls an output which puts that set of deflectors into communication whith the horizontal chamber 8. In that case, the hot gas circulates lateraly over large surfaces, which is an object of the invention.
In figure 2 i t can be seen that the vertical pipes 4', 5' are fixed at a wall 10 which is part of the device and which extends until a sole 11 which can be constituted of a refractory material or of a metal sheet.
The hearth according to the invention comprises at its under and front part an input aperture 12 through which the ambient air penetrates. That aperture 12 creates, under the sole 11, a space 13 which comrnunicates, by means of the vertical space ~3~o~
situated beyond the wall 10, with a second horizon tal chamber 14 situated at the upper part of the device. That second horizontal chamber 14 comprises an aperture 15 through which the heated air escapes.
It will be evident that the ambient air circulation in that second circuit can be realised by a f an sucking or driving back the air des-tinated to circulate in that circuit.
From the description of a hearth comprising a recu-peration device according to the invention clearly results that the set of pipes 4, 5 constitu tes the longest possible way that can be imposed on the flue gas of which the calories has to be recuperated.
A very big advantage has to be seen in the fact that the parts which are the most exposed to a high heating are situated at the back of the hearth in such a manner that one has no longer to be afraid from an excessif heating of the front wall and of the loadin~ input of the hearth. This is indeed a very important object of the invention.
It will also be clear that all other modifications of the profile of the pipes can be provided in order to give them a path which is as long as possible and in order to recuperate a maximum of calories thereof.
2 0 It is of course also possible to modify the path to which the ambient air is subjected when it is passing through the hearth, but it also clear that the choice of the components as des-cribed in the present application constitu tes an optimal solution to the problems mentioned in the preamble.
Claims (6)
1. A hearth comprising a device for recuperation of heat contained in flue gas generated by combustion of a fuel such as for example, but non-exclusively, wood, said recuperation device being disposed inside an enclosure formed i.a. of two side walls, a back wall and a front wall comprising an entrance for inputting said fuel, characterized in that said recuperation device comprises a set of pipes collecting the flue gas in the neighbourhood of the back wall and in an upper part of said enclosure in order to lead the flue gas to said front wall and to lead it thereafter to an upper part of said enclosure in order to penetrate into a horizontal chamber situated in the upper part of the enclosure from which the flue gas is evacuated by means of a socket coupling to a chimney.
2. A hearth as claimed in Claim 1, characterized in that said set of pipes consists of two pipes each having an input aperture for inputting said flue gas and wherein each pipe comprises at an upper part a first pipe, said first pipe being thereafter extended by a second pipe which cross said enclosure starting from the back wall and extending towards the front wall for extending thereafter towards the upper part by means of a third pipe and penetrating into said horizontal chamber.
3. A hearth as claimed in Claim 1, characterized in that said set of pipes consists of a set of deflectors which direct the flue gas between two lateral walls starting from an input aperture of the flue gas, which input aperture is disposed at the upper part of said pipes, said deflectors issue forth at their upper part in said horizontal chamber.
4. A hearth as claimed in any one of Claims 1, 2 or 3, characterized in that said enclosure which is provided for receiving said device comprises at its under part a first aperture for inputting ambient air and, at its upper part, a second aperture, provided in a further horizontal chamber of said hearth and through which the air heated between the walls of the enclosure and the back wall of said device is returned outside said hearth.
5. Recuperation device to be used in a hearth as claimed in any one of Claims 1, 2 or 3, characterized in that it comprises a set of pipes.
6. Recuperation device to he used in a hearth as claimed in any one of Claims 1, 2 or 3, characterized in that it comprises a set of pipes, and further characterized in that said enclosure which is provided for receiving said device comprises at its under part a first aperture for inputting ambient air and, at its upper part, a second aperture, provided in a further horizontal chamber of said hearth and through which the air heated between the walls of the enclosure and the back wall of said device is returned outside said hearth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE08701258 | 1987-11-06 | ||
| BE8701258A BE1003452A3 (en) | 1987-11-06 | 1987-11-06 | PERIMETRIC RECOVERY OF GASES AND FUMES EMITTED BY A HEATING BODY. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1319303C true CA1319303C (en) | 1993-06-22 |
Family
ID=3882951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000582290A Expired - Fee Related CA1319303C (en) | 1987-11-06 | 1988-11-04 | Hearth comprising a device for heat recuperation |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0315251A1 (en) |
| JP (1) | JPH01296085A (en) |
| CN (1) | CN1042600A (en) |
| AU (1) | AU2447088A (en) |
| BE (1) | BE1003452A3 (en) |
| BR (1) | BR8805654A (en) |
| CA (1) | CA1319303C (en) |
| DK (1) | DK619488A (en) |
| FI (1) | FI885096A (en) |
| NO (1) | NO884852L (en) |
| OA (1) | OA08967A (en) |
| PT (1) | PT88928A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2090804C1 (en) * | 1996-04-22 | 1997-09-20 | Рафаэл Газетов | Generator heat utilizer |
| JP2006281077A (en) * | 2005-03-31 | 2006-10-19 | Shizen Club:Kk | Flue gas filtering device for heater |
| JP2008224075A (en) * | 2007-03-09 | 2008-09-25 | Masaji Furukawa | Fireproof wall-fireproof floor device, fuel supply device and combustion device with fuel supply device |
| JP5576012B2 (en) * | 2007-06-07 | 2014-08-20 | 光洋サーモシステム株式会社 | Heat recovery equipment |
| EA020432B1 (en) * | 2012-01-09 | 2014-11-28 | Жиргалбек Омуралиевич САРЫМСАКОВ | Heating boiler |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2093492A (en) * | 1935-11-11 | 1937-09-21 | Robert F Sharp | Fireplace heater |
| US2143772A (en) * | 1938-05-17 | 1939-01-10 | Hannula Gust | Heating unit for fireplaces |
| FR2294403A1 (en) * | 1974-12-12 | 1976-07-09 | Lambert Jean | Multiple heat exchanger appts. for wood fire - has ducts between hearth and hood with underfloor entry and discharge |
| US4280656A (en) * | 1979-05-04 | 1981-07-28 | Swanson Mervin D | Chimney heat economizer |
| US4319556A (en) * | 1981-03-09 | 1982-03-16 | Jamestown Group | Catalytic stove |
| DE8215086U1 (en) * | 1981-06-15 | 1983-06-16 | Aeberhard, Hans, 8902 Urdorf | OPEN CHEMINEE WITH FIREPLACE AND A FIREPLACE MOUNTAINING THERE |
| FR2524968B1 (en) * | 1982-04-08 | 1987-02-13 | Selva Guy | IMPROVEMENTS TO SELF-CONTAINED HOT AIR CIRCULATION FIREPLACE DEVICES FOR FIREPLACES |
| IT8230785V0 (en) * | 1982-08-27 | 1982-08-27 | Piazzetta Domenico Spa | TOTAL HOT AIR RECOVERY FIREPLACE-STOVE. |
| EP0162112A4 (en) * | 1983-11-28 | 1987-09-02 | Vermont Castings | Solid fuel heating appliances. |
| US4694820A (en) * | 1986-12-15 | 1987-09-22 | Buckner Carrol E | Stove with catalytic converter |
-
1987
- 1987-11-06 BE BE8701258A patent/BE1003452A3/en not_active IP Right Cessation
-
1988
- 1988-10-25 EP EP88202374A patent/EP0315251A1/en not_active Withdrawn
- 1988-10-28 AU AU24470/88A patent/AU2447088A/en not_active Abandoned
- 1988-11-01 NO NO88884852A patent/NO884852L/en unknown
- 1988-11-02 BR BR888805654A patent/BR8805654A/en unknown
- 1988-11-03 PT PT88928A patent/PT88928A/en not_active Application Discontinuation
- 1988-11-04 JP JP63277602A patent/JPH01296085A/en active Pending
- 1988-11-04 CA CA000582290A patent/CA1319303C/en not_active Expired - Fee Related
- 1988-11-04 OA OA59467A patent/OA08967A/en unknown
- 1988-11-04 DK DK619488A patent/DK619488A/en not_active Application Discontinuation
- 1988-11-04 FI FI885096A patent/FI885096A/en not_active Application Discontinuation
- 1988-11-05 CN CN88107606A patent/CN1042600A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042600A (en) | 1990-05-30 |
| DK619488A (en) | 1989-05-07 |
| PT88928A (en) | 1989-09-14 |
| OA08967A (en) | 1990-11-30 |
| EP0315251A1 (en) | 1989-05-10 |
| NO884852L (en) | 1989-05-08 |
| JPH01296085A (en) | 1989-11-29 |
| AU2447088A (en) | 1989-05-11 |
| FI885096A0 (en) | 1988-11-04 |
| BE1003452A3 (en) | 1992-03-31 |
| NO884852D0 (en) | 1988-11-01 |
| FI885096A (en) | 1989-05-07 |
| BR8805654A (en) | 1989-07-18 |
| DK619488D0 (en) | 1988-11-04 |
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