EP2105665A2 - Récipient de stockage pour combustibles solides doté d'un élément de pression - Google Patents

Récipient de stockage pour combustibles solides doté d'un élément de pression Download PDF

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Publication number
EP2105665A2
EP2105665A2 EP20090450057 EP09450057A EP2105665A2 EP 2105665 A2 EP2105665 A2 EP 2105665A2 EP 20090450057 EP20090450057 EP 20090450057 EP 09450057 A EP09450057 A EP 09450057A EP 2105665 A2 EP2105665 A2 EP 2105665A2
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EP
European Patent Office
Prior art keywords
conveyor loop
fuels
reservoir
storage container
conveyor
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.)
Withdrawn
Application number
EP20090450057
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German (de)
English (en)
Inventor
Karl Gütl
Peter Resch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2105665A2 publication Critical patent/EP2105665A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • 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
    • F24B1/191—Component parts; Accessories
    • F24B1/199—Fuel-handling equipment

Definitions

  • the invention relates to a reservoir for solid fuels according to the preamble of claim 1 and a heating arrangement with a reservoir connected thereto.
  • a storage tank for solid fuel, in particular firewood, known which is suitable for connection to a combustion furnace and is equipped with a feed unit for the fuels to the furnace.
  • This storage container is characterized in that the conveyor unit comprises a flexible, flexible conveyor loop on which the fuels are placed in operation, wherein the conveyor loop when loaded with the fuels forms a sagging down, approximately sack-shaped in cross-section, and wherein drive or Traction means are provided, with which the conveyor loop can be reversibly brought into a tensioned state, in which the length of the conveyor loop is shortened and the sag is reduced, whereby the therein Inlaid fuels can be brought upwards.
  • the conveyor loop of this embodiment is mounted or suspended between two deflection axes, whereby an intermediate upwardly open discharge area is formed, via which the fuels can be brought out of the conveyor loop through a discharge opening.
  • Both deflection axes ie the oven-near and the furnace-remote deflection axis, are designed as independently operating drive or traction means. In this way, the advantage is ensured that the fuel is always located at a specific height by the two independent drives. Thus, the control of when the wood is conveyed in the direction of the furnace, can be very precise and accurate.
  • the object of the invention is therefore to provide a storage container, can be promoted efficiently with the wedging prone to fuel, in particular logs, as possible without wedging.
  • a pressure element is arranged in the uppermost region of the storage container, above the fuels or above or in the discharge area (s), which moves the fuel moving upwards from the delivery unit and reaching the area of action of the pressure element in the direction of the discharge opening or in the direction of the oven, in particular over a discharge edge away, presses or pressurized. Since wedges usually have only minor causes or are caused by small-scale entanglements between the woods, they can also be solved by low movements or low forces again.
  • the conveying unit comprises a flexible, flexible conveyor loop or is designed as a conveyor loop on which the fuels are placed in operation, wherein the conveyor loop in the initial state or when loaded with the fuels gravity-downward sagging, in cross-section approximately bag-shaped Form forms, and wherein, in particular via at least one drive or traction means, the conveyor loop is reversibly brought into a tensioned state in which shortens the length of the conveyor loop and their sagging is reduced, whereby the fuel inserted therein upward and subsequently can be brought out through a discharge opening in the direction of the oven.
  • a mechanically very simply constructed device is created, which is less susceptible to interference and has little signs of wear during operation. Accordingly, it works reliably and any maintenance is very easy to perform.
  • a further advantageous embodiment is that the conveyor loop 1 is not closed to an endless loop and has a defined length and is fixed in position or tensile strength at a first end portion, in particular fixedly secured to the inside of the upper cover of the reservoir or a support frame , And the opposite second end portion of the conveyor loop is free and unfixed or the conveyor loop can be acted upon at this end with tensile stress.
  • a reservoir in practice can also be used advantageously when the conveyor loop is fixed at its one end position or tensile strength and the other end of the conveyor loop is free and unfixed and Conveyor loop there is subject to tensile stress, which leads to the desired reduction.
  • the conveyor loop can be easily downsized in this way, whereby the functionality of the reservoir or the promotion of the fuel is maintained upwards. It is a mechanically very simple structure, low-cost device created that is less susceptible to interference and has little signs of wear during operation. Accordingly, it works reliably and any maintenance is very easy to perform.
  • the conveyor loop does not have to be designed as a circulating endless belt, which also contributes to a cheapening and structural simplification.
  • the conveyor loop is fixed in position fixed to a fixing position or axis at its discharge opening or furnace remote area and stored at its the discharge opening near or near furnace area on a deflection axis, wherein the conveyor loop on the deflection axis preferably a deflection down by more than 90 °, in particular more than 160 °, preferably by 180 ° experiences, wherein the conveyor loop between the mounting position and the deflection axis is stored or mounted so that an intermediate, upwardly open discharge area is formed over the fuels from the conveyor loop and subsequently through a discharge opening in the direction of the furnace can be brought out.
  • it is sufficient for a single deflection axis at the discharge opening in order to operate the reservoir advantageous.
  • the deflection axis represents a defined Ausbringkante over which the fuels are discharged in the direction of the furnace, the deflection axis is arranged in particular deeper than the mounting position. This technically simple measure ensures the reliable loading of the furnace.
  • the conveyor loop is formed in the fully tensioned and unloaded state between the deflection axis and the mounting axis as an almost flat surface.
  • the conveyor loop can be completely freed or emptied of logs in a simple and fast way, which is very useful especially for repair work.
  • the conveyor loop is formed as a one-piece mat or wide band or chain or from at least two spaced-apart, parallel to each other extending individual bands or chains composed. In this way, consideration can be given to the nature and dimensions of the billet.
  • the deflection axis is for advantageous movement of the conveyor loop, depending on the width or shape of the conveyor loop, optionally rotatable about its own axis, optionally od with adhesion improvers such as teeth od.
  • deflection tube, rod, roller -rolle or designed as a gear Like. Equipped (s), deflection tube, rod, roller -rolle or designed as a gear.
  • the conveyor loop In order to facilitate facilitated delivery of the fuel over the discharge edge, while at the same time providing stable and reliable guidance of the conveyor loop 1, in which slipping off the deflection axis is not possible, it is advantageous for the conveyor loop to be formed in the surface of the deflection axis , Grooves or depressions and is slightly raised above the edge of the grooves or depressions and protrudes and acts by their movement in the direction of the discharge opening itself as a further promotion of the fuel via the discharge edge effecting agent.
  • a mechanically very simple and reliable construction specifies that, in particular exclusively, the deflection axis is designed as a drive or traction means suitable for the tension of the conveyor loop, in particular, or driven by a drive or traction means.
  • the special design of the support frame provides the advantage of additional support of the conveyor loop, especially for heavy loads. In this way, the maximum sag or size of the conveyor loop is limited or predetermined. This is to prevent tearing of the conveyor loop at full load or define the maximum capacity.
  • the conveyor loop 1 can be mounted or suspended at its uppermost areas between two deflection axes 1, whereby an intermediate upwardly open discharge area 7 is formed, through which the fuels 17 from the conveyor loop 1 through a discharge opening 12 to the furnace 40 out are available.
  • a heating arrangement having an oven with a combustion chamber and preferably an automatic ignition, optionally connected to a heat exchanger, which further has a reservoir according to the invention.
  • a heating arrangement having an oven with a combustion chamber and preferably an automatic ignition, optionally connected to a heat exchanger, which further has a reservoir according to the invention.
  • Such a device has the advantage that an automatic promotion of the fuels is possible and they can be reloaded or ignited at the most appropriate time. Due to the possibility that the reservoir has a multiple of the volume of the combustion chamber, an automatic heating operation over a longer period is possible.
  • the lock module according to claim constitutes an advantageous connection between the oven and the storage container. This increases the safety or increases the control possibilities.
  • a level of the fuel indicating level detector is arranged, which is coupled to the control of the reservoir or is in operative connection.
  • a heating arrangement which comprises a reservoir 20 according to the invention and an oven 40, which are optionally in operative connection with each other via an optional lock module 30 or coupled.
  • the reservoir 20 is spatially separated from the oven 40. From the reservoir 20 performs a discharge opening 12 as a single opening of the Reservoir 20 in the lock module 30 and further into the oven 40, but it can also lead directly into the oven 40.
  • the storage container 20 has a delivery unit with which fuels 17 can be conveyed to the furnace 40.
  • This conveyor unit is formed according to the invention in the form of a flexible and flexible conveyor loop 1.
  • the fuels 17 can be placed on this conveyor loop, as in Fig. 2 is shown.
  • the conveyor loop is as in Fig. 2 represented, composed of two mutually spaced mutually parallel individual bands or chains.
  • the conveyor loop 1 depending on the type or size of the fuel 17 also have a different shape, in particular, this can be configured as a one-piece wide mat or a wide band, in which case there is no gap between the individual bands.
  • the conveyor loop 1 may also be formed as a chain or have a net-like structure.
  • the conveyor loop 1 is not formed as an endless loop or endless belt, but has a defined length with a first end portion 60 and a second end portion 61.
  • the conveyor loop 1 is at this first, the discharge opening 12 distant or furnace remote, end region 60 fixed or tension fixed to the inside of the upper cover of the reservoir 20 and fixedly attached to the upper surface of the support frame 21 and that at a mounting position or -axis 3 '.
  • the conveyor loop 1 is mounted near the second end portion 61 on a deflection axis 4 or partially wound around this deflection axis 4, wherein the conveyor loop 1 experiences a deflection downwards by about 180 ° via the deflection axis 4.
  • the conveyor loop 1 is thus mounted or suspended between the attachment position 3 'and the deflection axis 4 so that an intermediate, upwardly open discharge area 7 is formed, via which the fuels 17 from the conveyor loop 1 and subsequently through a discharge opening 12 in the direction of the oven 40 can be brought out.
  • This upwardly open discharge area 7 extends between the attachment position 3 'and the deflection axis 4th
  • the reservoir 20 is housed substantially in a housing which is bounded on both sides with side walls 22.
  • the depth of the reservoir 20 is a few centimeters shorter than the depth of the combustion chamber to allow safe insertion.
  • the billet is advantageously to choose in its length so that it the depth of the reservoir 20 corresponds, ie it must be ensured that the firewood 17 and the firewood is stackable and as in Fig. 2 can be placed on the conveyor loop 1. Deviations of approx. 20% to the maximum length do not disturb the function. In order to exclude disturbances of the automatic conveyance, it is advantageous to sort out large and extremely shapeless piece of wood 17 or wood with protruding branches as well as too small or brittle wood in advance. Fuels, which have the usual dimensions and geometries, as they arise in the wood splitting of round and square timber, are suitable for the feed.
  • At least one drive or traction means is further provided, with which the conveyor loop 1 can be moved or stretched or relaxed or with which the length of the conveyor loop 1 can be shortened or extended and their sag is reduced or increased , In this way, with appropriate movement of the drive or traction means of the bag-shaped cross-section or the barrel volume of the conveyor loop 1 and the fuels 17 are increased upward in the direction of the discharge area 7 towards. This process is reversible.
  • a fixing position 3 ' arranged on the left side of the storage container 20 is provided, which is remote from the dispensing opening 12, and a deflection axis 4 close to the dispensing opening 12. These two positions 3', 4 define the size of the dispensing area 7.
  • the right deflection axis 4 represents an upper discharge edge 19, which must overcome the fuels 17 in order to be discharged in the direction of the lock module 30 or to the oven 40.
  • the attachment position 3 ' is relatively higher than the deflection axis 4 with respect to the conveyor loop 1. This predetermines the direction with which the fuels 17 can be removed from the conveyor loop 1, namely in the direction of the dispensing opening 12 via the dispensing edge 19.
  • Fig. 1 respectively.
  • Fig. 3 the conveyor loop 1 is completely loaded with fuel 17 and is in their maximum sagging ago.
  • the conveyor loop 1 forms a bag-like shape and depends down through. If fuel 17 is discharged from the conveyor loop 1 or train applied via the drive means, so reduces the cross-section, the capacity and the length of the conveyor loop 1 and the conveyor loop 1 takes a - not shown - reduced form with a smaller volume.
  • the conveyor loop 1 forms a flat surface between the mounting position 3 'and the Deflection axis 4 off. Fuels 17 can not hold on this inclined surface and automatically slide over the discharge edge 19 through the discharge opening 12 into the lock module 30.
  • the oven-near deflection axis 4 can be either a freely rotatable deflection roller or a roller or a rigid smooth deflection bar, on which the conveyor loop 1 can slide along.
  • the diverting axes may also be at least partially filled with adhesion improving agents, e.g. To be equipped teeth or protrusions to achieve a good operative connection or intervene in the chain especially when forming the conveyor loop 1 as a network or chain.
  • the conveyor loop 1 can also extend in, formed in the surface of the deflection axis 4, grooves or depressions and thereby be slightly raised above the edge of the grooves or depressions or protrude or have a greater thickness than the depth of the grooves.
  • the deflection axis 4 is formed as the only drive or traction means of the conveyor loop 1 or driven by a motor.
  • the drive of the conveyor loop 1 could also be done via a, possibly additional, independent drive, which attaches somewhere to the conveyor loop 1.
  • a - not shown - height detector 6 is provided in the open output area 7 of the conveyor loop 1.
  • This height detector 6 may be a mechanical or electronic, for example, equipped with light elements or sensors, detector. If the height detector 6 is triggered by the fuels 17 by the fuels 17 reaching a certain height in the discharge area 7, the movement of the conveyor loop 1 and / or the drive or the traction means is stopped or reversed for a certain time.
  • the fuels 17 can be discharged from the storage container 20 via a delivery opening 12 located at the top right in the storage container 20.
  • a lock module 30 is arranged, in which a system of flaps or rotary valves or fire protection, smoke protection and / or metering flaps 50 is arranged for the fuel 17.
  • the flaps are smoke-tight or insulated against exhaust gases and close tightly, so that no exhaust gases can escape from the furnace 40 in the direction of the reservoir 20.
  • the combustion chamber or the combustion chamber 25 of the furnace 40 In the area below the lock module 30 is the combustion chamber or the combustion chamber 25 of the furnace 40.
  • a level detector 13 may be provided, which indicates how much fuel 17 is present in the combustion chamber 25.
  • This level detector 13 is connected to the control of the reservoir 20, in particular with the control of the conveyor loop 1. When the level detector 13 is triggered, the movement of the conveyor loop 1 is stopped or vice versa.
  • a heat exchanger 11 is attached, which is heated by the heat of the combustion chamber.
  • an overload protection can be provided in the event that it comes to a wedging.
  • the power consumption is monitored, which is required for the movement of the conveyor loop 1.
  • wedging the conveyor loop 1 can no longer promote or encounters a resistance. If the limit of the monitored current consumption is exceeded, then a stop or a reversal of the motor rotation direction or the movement of the conveyor loop 1 is initiated, whereby the wedging can be effectively eliminated.
  • the storage container 20 is larger by a multiple and has a larger volume than the combustion chambers 25th
  • a three interconnected straight plate-shaped plates existing rectangular support frame 21 is provided in the reservoir 29. This surrounds the conveyor loop 1 outside and limits laterally and down the maximum sag of the conveyor loop 1 and specifies the maximum size of the conveyor loop 1. Alternatively, a lower support plate may be provided which supports the conveyor loop 1 only down and limits their maximum sag down.
  • a part of the support frame 21 also extends into the discharge area 7 above the fuel 17. At this horizontally extending part of the support frame, the first end portion 60 and the contact position 3 'is arranged or there, the conveyor loop 1 is fixed.
  • the side edges of the support frame 21 are welded to both side walls 22 of the reservoir 20. Thus, it simultaneously determines the depth or width of the reservoir 20.
  • a pressure element 70 is arranged in the uppermost region of the storage container 20 above the fuels 17 or above or in the discharge area (s) 7.
  • This pressure element 70 presses or pressurizes the fuels 17 moving upward from the conveyor loop 1 and reaching the area of action of the pressure element 70 in the direction of the dispensing opening 12 or in the direction of the oven 40 and optionally even beyond the dispensing edge 19.
  • the pressure element 70 is designed drive-free without a motor and is only moved by a bottom of the fuels 17 upward force. Furthermore, the pressure element 70 is movable independently of the conveyor loop 1 and / or the deflection axis 4.
  • the pressure element 70 has at least one pressure bar 71, which finally detects the fuels 17 and exerts a sufficient pressure on the fuels 17 due to its own mass.
  • the net mass of the pressure bar 71 thus contributes to the promotion or movement of the fuels in the desired direction or exerts the required impulse on the woods.
  • the surface 74 of the lower side edge of the pressure beam 71 is patterned or hooked to assist in the promotion of the fuels 17 in the desired direction.
  • the pressure bar 71 advantageously extends over a substantial portion of the longitudinal extent of the reservoir 20, whereby it can also detect several woods simultaneously at different positions.
  • the pressure bar 71 is freely swinging or oscillating with a horizontal movement component, wherein the pressure bar 71 according to FIG Fig. 1 parallelogram-like swinging, and is constantly aligned parallel to the top of the reservoir or the support frame 21 and horizontally.
  • the pressure bar 71 is fastened via two braces 72, 73 by means of joints 75 to the inner surface of the upper side of the storage container 20 or of the support frame 21 and can thereby carry out the relevant movement.
  • the movement is composed of a horizontal and a vertical component, wherein the horizontal component promotes or moves the fuels 17 in the direction of the discharge opening 12 and the vertical upward component even lifts the fuels 17 slightly or does not press down. This rocking movement effectively prevents wedging of the fuels 17 and any wedges are dissolved again. In this way, individual logs in the top row can even roll over each other in the direction of the discharge opening 12 or rolled.
  • the pressure bar 71 is aligned parallel to the side walls 22 of the storage container 20 or parallel to the plane spanned by the conveyor loop 1 and its movement is also parallel to these side walls 22 and parallel to the plane defined by the conveyor loop 1 plane or normal to the orientation the lying on the conveyor loop 1 Scheitholze.
  • a stop element 76 is arranged, which corresponds to the of the Output opening 12 directed away movement of the pressure element 70 and the pressure bar 71 to the left on one side.
  • the pressure element 70 or the pressure bar 71 is thereby given an initial position with increased potential energy which is unequal or is deflected from the rest position in the direction of the dispensing opening 12. Also, the direction in which the pressure bar 71 can move, as soon as a force acts on it from below, is defined by it.
  • the initial operation of the heating arrangement with the reservoir 20 and the promotion of fuel 17 to the furnace 40 is in practice as follows: About a Gree the conveyor loop 1 with fuel, especially logs 17, loaded. The filling door is then closed. Now comes from the furnace control the signal that heating material is needed, so raises the conveyor loop 1 and their sagging is reduced. This is done by activating the motor-driven deflection roller 4. This fires the firewood 17 with it until it falls through the discharge opening 12 via the discharge edge 19. If the fuel reaches the maximum limited height 17, the height detector 6 is triggered and the movement of the guide roller 4 is stopped or even vice versa.
  • the pressure element 70 works so that the fuel 17 is lifted from below through the conveyor loop 1 and enters the sphere of action of the pressure element 70. The fuel 17 then abuts the pressure bar 71, exerts a force on it and raises it slightly or deflects it in the predetermined direction to the right. The pressure element 70 or the pressure bar 71 deviates or is now lifted by the movement of the fuel 17 and offset to the right or deflected to the right above in the direction of the discharge opening 12.
  • the fuel materials 17 are taken or the fuel materials 17 are a horizontal and a vertical force or are offset and slightly raised. This is usually sufficient to transport the fuels 17 to the discharge opening 12 or even to allow the fuels 17 to roll directly over the discharge edge 19.
  • the supply of the fuel 17 from the reservoir 20 into the combustion chamber 25 of the furnace 40 takes place automatically depending on the energy requirement.
  • the efficiency of such systems increases because the control of the furnace 40 in an optimal Combustion process works with a defined amount of fuel. Overcrowding is excluded here. An otherwise in such solid fuel stoves necessary "stinking" of the combustion with energy surplus is eliminated. This has an advantageous effect on the efficiency, the exhaust gas values and on the maintenance intervals of such systems.
  • Fig. 3 a further embodiment is shown, the embodiment according to the WO 2007/140491 corresponds, in which the conveyor loop 1 is formed as an endless loop and between two deflection axes 3,4, which define the discharge area 7, is mounted. Both deflection axes 3,4 can be driven separately.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
EP20090450057 2008-03-25 2009-03-12 Récipient de stockage pour combustibles solides doté d'un élément de pression Withdrawn EP2105665A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0046308A AT506321B1 (de) 2008-03-25 2008-03-25 Vorratsbehälter für feste brennstoffe mit druckelement

Publications (1)

Publication Number Publication Date
EP2105665A2 true EP2105665A2 (fr) 2009-09-30

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EP20090450057 Withdrawn EP2105665A2 (fr) 2008-03-25 2009-03-12 Récipient de stockage pour combustibles solides doté d'un élément de pression

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AT (1) AT506321B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012104784A1 (de) * 2012-06-01 2013-12-05 Andreas Dillinger Schleuse und Verfahren für das Zuführen von stückigem Brennmaterial zu einer Brennkammer eines Verbrennungsofens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539915A (en) 1983-09-14 1985-09-10 Francis Bouron Automatic feed device for solid fuel boiler, specifically for logs of wood
FR2668581A1 (fr) 1990-10-26 1992-04-30 Clement Pascal Distributeur de buches pour l'alimentation des chaudieres a bois.
AT399388B (de) 1992-10-20 1995-04-25 Hofbauer Fritz Ofen bzw. kessel für feste brennstoffe, insbesondere holz
WO2007140491A1 (fr) 2006-06-09 2007-12-13 Guetl Karl Réservoir de stockage et four

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1206047A (fr) * 1984-12-04 1986-06-17 Louis Paquette Alimenteur automatique a barillet pour poele a bois
DE3537842A1 (de) * 1985-10-24 1987-04-30 Edmund Wagner Entgasungsanlage zur teilpyrolytischen verbrennung von festbrennstoffen
DE3621963A1 (de) * 1986-07-01 1988-01-14 Wolfgang Fuchs Stueckholz-beschickungseinrichtung
IT1311814B1 (it) * 1999-01-26 2002-03-19 Gruppo Piazzetta Spa Dispositivo di alimentazione,particolarmente per stufe o caminetti.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539915A (en) 1983-09-14 1985-09-10 Francis Bouron Automatic feed device for solid fuel boiler, specifically for logs of wood
FR2668581A1 (fr) 1990-10-26 1992-04-30 Clement Pascal Distributeur de buches pour l'alimentation des chaudieres a bois.
AT399388B (de) 1992-10-20 1995-04-25 Hofbauer Fritz Ofen bzw. kessel für feste brennstoffe, insbesondere holz
WO2007140491A1 (fr) 2006-06-09 2007-12-13 Guetl Karl Réservoir de stockage et four

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AT506321B1 (de) 2009-08-15
AT506321A4 (de) 2009-08-15

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