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EP0380811B1 - Broyeur à impact - Google Patents

Broyeur à impact Download PDF

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Publication number
EP0380811B1
EP0380811B1 EP89124144A EP89124144A EP0380811B1 EP 0380811 B1 EP0380811 B1 EP 0380811B1 EP 89124144 A EP89124144 A EP 89124144A EP 89124144 A EP89124144 A EP 89124144A EP 0380811 B1 EP0380811 B1 EP 0380811B1
Authority
EP
European Patent Office
Prior art keywords
rotor
impact crusher
crusher according
impact
housing portion
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 - Lifetime
Application number
EP89124144A
Other languages
German (de)
English (en)
Other versions
EP0380811A2 (fr
EP0380811A3 (fr
Inventor
Claus Dipl.-Ing. Gronholz
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
Priority claimed from DE3939598A external-priority patent/DE3939598C2/de
Application filed by Individual filed Critical Individual
Publication of EP0380811A2 publication Critical patent/EP0380811A2/fr
Publication of EP0380811A3 publication Critical patent/EP0380811A3/fr
Application granted granted Critical
Publication of EP0380811B1 publication Critical patent/EP0380811B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers

Definitions

  • the invention relates to an impact crusher according to the preamble of patent claim 1.
  • Impact crushers are commonly known as crushers.
  • the feed material freed from the fine material by a sieve or grate passes between blow bars of a rotatingly driven rotor and baffle plates or so-called monoblocks and is crushed between them to a predetermined grain.
  • Known impact crushers or impact mills are normally designed for certain types of rock to be crushed, for example hard rock, medium-hard rock, etc. In addition, they are designed for certain degrees of comminution, but by adjustment the monoblocks can be changed within limits. If the known impact mills are used in quarries, they will find a certain rock and can be set up accordingly. However, crushers are also increasingly used in recycling, for example of building materials such as rubble, road construction or the like. Such a material comes in very different grain sizes and hardness. It is not possible to provide the appropriate impact crusher for this. Impact mills are very complex devices that, if possible, must be used in continuous operation in order to work cost-effectively.
  • an impact crusher of the type mentioned at the outset has become known, which has two housing sections which can be opened apart.
  • the motor of an impact crusher preferably an electric motor
  • the motor of an impact crusher is designed for a certain crusher output, with the aim being to choose the size of the motor so that operating conditions which usually occur can be controlled without damage to the motor. If very large pieces to be broken are given up, for example of a consistency that is not as hard as tree stumps or the like, the engine may be required to perform quite well. This is especially true if knife tools are used instead of the usual blow bars, which will be discussed further below. There is a risk that the motor will be overloaded and damaged. Such pieces can therefore not be processed with the impact crusher. Since pre-sorting is often not carried out or is omitted for reasons of cost, it cannot be determined from the outset whether there is a risk of overloading the crusher motor in the case of a discarded piece. In order to counter such incidents, the crusher motor would have to be designed considerably larger are required for normal operation, which considerably increases the effort for the crusher.
  • the invention is therefore based on the object of improving an impact mill of the type mentioned in such a way that stones, soft waste, wood or the like can optionally be comminuted without overloading the crusher motor due to components which are difficult to break.
  • At least one clamping element is adjustably mounted above the rotor.
  • the clamping element can be formed by a baffle plate or, according to another embodiment of the invention, by a press ram which is adjustably mounted on the other housing part with respect to the baffle plate by means of an adjusting cylinder.
  • the adjusting device for the clamping element can adjust the clamping element above the rotor into a clamping position that reduces the feed cross section and into a retracted rest position.
  • the supply circuit for the drive motor of the rotor is one Associated current measuring device which is connected to a control device.
  • the control device issues an actuating signal to the adjusting device for adjusting the clamping element from the rest position to the clamping position when the current exceeds a predetermined value. An adjustment in the opposite direction takes place when the current falls below a predetermined value again.
  • the invention is based on the knowledge that the supply current for the rotor is an indicator of the load on the motor. With the help of the current measuring device, the overload can thus be easily detected.
  • Overload measurement is generally known for electric motors. In the invention, however, it is not the overload that is determined, but a current value that is below the value at which the motor is switched off in the case of overload protection devices.
  • the rotor should continue to rotate. The current measurement signal only serves to actuate the clamping element, so that the piece to be broken is clamped in the funnel above the rotor and can therefore not continue to slide. The rotor continues to turn and can further process and shred the facing section of the piece to be broken.
  • the clamping element can be moved back to the rest position.
  • the usual breaking operation can therefore be continued.
  • the described process can be repeated several times.
  • an embodiment of the invention provides that means for selectively attaching a further baffle plate are provided on the second housing section, the lower end of which comes close to the rotor when the second housing section is in the pivoted-down position and the housing sections in the pivoted-down position of the second housing section can be connected by lateral plate-like elements or the like forming a filling funnel.
  • This embodiment of the invention makes the fact take advantage of the fact that conventional impact crushers consist of two housing sections that can be swiveled apart.
  • the pivotability of a housing section normally serves to provide access to the rotor, in particular in the case of so-called stoppers. Without such a measure, it is hardly possible to loosen or remove a jammed rock.
  • an impact crusher can work even when the housing is in the opened state and care is taken that a lateral limitation is provided which prevents the material which has now been input from above from falling out laterally.
  • a conventional impact crusher into a comminution device for soft waste, essentially only three components are necessary, namely the side boundary plates and a modified impact plate.
  • the baffle plate mounted on it lies relatively far from the rotor, so that material thrown in from above would fall through the gap between the baffle plate and the rotor without being crushed.
  • the lower one would in the opened state Monoblock form too large a gap with the rotor.
  • another baffle plate is installed, the lower end of which comes close to the motor.
  • the baffle plate which has a suitable slope, which ensures that the material to be shredded automatically slides down, is preferably pivotably hinged near the filling opening and is preferably connected in the lower region to an adjusting cylinder, via which the angular position can be changed.
  • the adjusting cylinder which is articulated to the further baffle plate, can be connected to a vibration device, with which the material to be shredded is set into more or less strong vibrations. These cause the soil and sand to be shaken off, which can otherwise lead to premature wear of the shredding tools.
  • the piece to be broken is not only held in place when the clamping element is moved into the clamping position, but may also be pushed up somewhat by the assigned surface of the baffle plate used as a ramp, is pushed along the baffle.
  • the clamping position of the clamping element is not a fixed position, but depends on the size of the piece to be broken and clamped. It is only necessary that the adjusting device acts on the clamping element with a predetermined force.
  • blow bars which in cooperation with the impact plate cause the crushing effect.
  • Blow bars are not suitable for softer goods. Blow bars would only squeeze the goods and would not be able to shred them into individual pieces. Therefore, an embodiment of the invention provides that knife tools can optionally be attached to the rotor.
  • the knife tools are preferably designed so that they can be used on the rotor instead of the blow bars without special conversion measures.
  • bar-like knife holders can be provided, on which the knife tools can be detachably fastened.
  • the cutter bars are attached to the rotor instead of the blow bars and in turn are used to attach individual cutter tools, which are preferably arranged at intervals from one another are.
  • This design of the knife tools also has the advantage that individual worn or destroyed knives can be replaced. Since, as mentioned, there is no need to provide a continuous knife edge, it is advantageous if the lower edge of the baffle plate facing the rotor has recesses corresponding to the knife tools that pass through the knife tools when the rotor is rotating. The flapper between the knife tools therefore extends further to the rotor. Knife tools and baffle plate are therefore somewhat interlocked.
  • a pressing device which is assigned to the upper filling opening. It can be formed, for example, by a flap which is actuated by a force element, for example a hydraulic cylinder.
  • the pivot axis for the second housing section lies at a certain distance from the contact surface of the impact crusher.
  • the maximum opening width caused in this way is sufficient to eliminate stoppers. If, however, according to one embodiment of the invention, the pivot axis is close to the footprint is arranged, a larger "mouth width" is achieved when the housing is opened.
  • the impact crusher shown in FIG. 1 has a housing 10 with a first housing section 11 and a second housing section 12.
  • the first housing section 11 has a lying frame 14 with a contact surface 15 in which a rotor 16 is rotatably mounted, which is supported by a Electric motor, not shown, is driven.
  • the rotor carries blow bars 17 at a circumferential distance of 90 °, which are attached in suitable clamping devices 18.
  • the upright section 18a of the first housing section 11 has a feed mouth 19.
  • the second housing section 12 is pivotally mounted at 20 on the left upper end of the frame 14 about a horizontal axis. 1 shows the housing section 12 in the opened position, as is normally assumed when access to the rotor 16 is required to remove the stopper.
  • the second housing section 12 supports baffle plates 21 and 22, which are shown in dashed lines and are pivotally mounted at upper pivot points (not specified in more detail) and are articulated at a distance from them on adjusting rods of adjusting cylinders 23 and 24, respectively.
  • the baffle plates 21, 22 are in use, if the impact crusher shown is operated in a conventional manner with the housing sections 11, 12 folded, the material to be crushed, for example rock material, being fed into the mouth 19 in the direction of arrow 25.
  • the impact plate 22 is removed and a baffle plate 26 takes its place (shown in solid lines), which is pivotally mounted at 27 in the housing section 12 and on which the adjusting rod 28 is at 28 Adjusting cylinder 29 is articulated.
  • the baffle plate 21 which is shown in two different positions in FIG. 1, can assume the most withdrawn position or can also be removed.
  • Correspondingly shaped sheets are inserted and fastened laterally between the housing sections 11, 12, one of which can be seen at 30.
  • the sheets 30 connect the housing sections 11, 12 to one another and hold them in the unfolded position. At the same time, they delimit a filling funnel which is open at the top and whose filling opening is designated by 31.
  • a sheet metal plate 32 is connected to the first housing section 11 on the side opposite the baffle plate 26 and blocks the passage to the mouth 19.
  • the impact crusher is suitable for picking up more or less soft material to be shredded, the pieces of which can take up a relatively large volume.
  • blow bars 17 are attached to the rotor 16, as mentioned. They are not particularly suitable for shredding softer goods. It is therefore expedient to replace the blow bars 17 with knife tools.
  • 5 shows a knife bar 40 which has mounting projections 41 in its upper side for correspondingly shaped knives.
  • the cutter bar 40 is received by the clamping devices 18 instead of the blow bars 17.
  • a corresponding knife 42 is shown in FIG. 4. Viewed from the front, it has an arcuate contour, the arc being formed by a knife edge or knife edge 43, while the surface 44 located therebetween is recessed, as can be seen in dashed lines in the left-hand illustration of FIG. 4.
  • the plane in which the knife edge 43 lies is inclined obliquely forward radially outward.
  • the underside of the knife 42 is designed such that the knife 42 can be conveniently attached to the mounting projections 41, for example with the aid of a suitable screw connection.
  • Fig. 3 several such knives 42 are indicated schematically, as they are arranged along a knife bar.
  • the lower region of the monoblock 26 is also indicated in FIG. 3. It can be seen that the lower edge is shaped in accordance with the cutter bar 40 or the cutters 42, and thus has recesses 45 which the cutters 42 pass when the rotor 16 rotates.
  • the adjusting cylinder 29 By actuating the adjusting cylinder 29, the distance between the baffle plate 26 and the cutter bar or the rotor can be changed and the size of the material to be shredded can thus be determined.
  • the articulation point 27 of the baffle plate 26 can also be connected to an externally mounted adjusting cylinder in order to adjust the baffle plate 26 as desired in one plane. In this case, however, the baffle plate 21 must be removed.
  • Fig. 2 shows a similar representation as Fig. 1, so that the same parts are provided with the same reference numerals.
  • baffle plates 21, 22, which are provided for the normal operation of the impact crusher, are preferably removed, in particular the baffle plate 21, around a relatively long baffle plate 50 whose upper end extends close to the upper end of the opened housing section 12 and is pivotally mounted at 51 at a distance from it. Near the lower end, the adjusting rod of a hydraulic cylinder 52 articulates. It is understood that a hydraulic cylinder can also act on the hinge point 51.
  • the lower end of the baffle plate 50 can, for example, be the same as that of the baffle plate 26 according to FIG. 1 if the baffle strips 17 are replaced by knife tools shown in FIGS. 3 and 4.
  • the left open end of the upright section of the first housing section 11 is covered by a plate-shaped clamping element 55 (press ram) which is suspended from the adjusting rods of two adjusting cylinders 56, 57.
  • the adjusting cylinders 56, 57 are held on a plate 58, which is shown schematically and is fastened in the first housing section 11 with the aid of suitable precautions.
  • the clamping element 55 can be adjusted in the direction of the double arrow 59 in order to exert a corresponding pressing pressure on the material to be shredded which is filled in from above.
  • the rotor 16 is driven by an electric motor 60, which is connected to an AC voltage source 62 via a line 61.
  • the line 61 is associated with a current measuring device 63, which is connected to a control device 64.
  • the control device 64 controls the hydraulic cylinders 56, 57 for the clamping element 55 via a corresponding line 65. If the value of the current in the line 61 reaches a predetermined amount, the control element 64 controls the cylinders 56, 57 so that the clamping element 55 in Move towards the baffle 50. A piece to be broken located above the rotor 16 is thereby clamped between the clamping element 55 and the baffle plate 50.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Cosmetics (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Claims (15)

  1. Broyeur à impact, comprenant :
       un carter (10), qui présente une première partie de carter (11) comportant un orifice supérieur de remplissage (31) et une deuxième partie de carter (12), montée sur la première partie de carter (11), pivotant autour d'un axe horizontal (20) situé près de la surface d'assise (15) et portant au moins une plaque d'impact (21, 22),
       et un rotor (16) monté tournant sur la première partie de carter (11), entraîné par un moteur d'entraînement et comportant des outils de fragmentation (17),
       caractérisé en ce que l'orifice de remplissage supérieur, quand les deux parties de carter (11, 12) sont relevées, est formé par ces dernières, ensemble avec des tôles latérales qui les relient,
       en ce qu'au-dessus du rotor (16), est monté, de façon réglable, au moins un organe de blocage (55), qui peut être placé, par un dispositif de positionnement (56, 57), dans une position réduisant la section de passage au-dessus du rotor (16), et dans une position de repos, en arrière en ce qu'au circuit d'alimentation (61) pour le moteur d'entraînement (60) du rotor (16), est associé un dispositif de mesure de courant (63), qui est relié à un dispositif de commande (64), étant entendu que le dispositif de commande (64) envoie au dispositif de positionnement (56, 57) un signal de déplacement pour laisser passer l'organe de blocage (55) de sa position de repos dans sa position de blocage, si le courant tombe en dessous d'une valeur prédéfinie.
  2. Broyeur à impact suivant la revendication 1, caractérisé en ce que l'organe de blocage (55) est disposé sur le côté opposé à la plaque d'impact (respectivement 21, 22 et 50).
  3. Broyeur à impact suivant la revendication 1 ou la revendication 2, caractérisé en ce que l'organe de blocage est formé par une pièce de serrage (55) et le dispositif de positionnement par au moins un vérin de positionnement (56, 57).
  4. Broyeur à impact suivant la revendication 3, caractérisé en ce que la pièce de serrage (55) est réalisé sous la forme d'une plaque.
  5. Broyeur à impact suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que, sur la deuxième partie de carter (12), sont prévus des moyens pour installer à volonté une autre plaque d'impact (26, 50), dont l'extrémité inférieure arrive presque contre le rotor, quand la deuxième partie de carter (12) se trouve en position relevée, et les parties de carter (11, 12) peuvent être reliées entre elles, quand la deuxième partie de carter est en position relevée, au moyen d'éléments (30) en forme de plaque, ou similaires, pour constituer une trémie d'alimentation.
  6. Broyeur à impact suivant la revendication 5, caractérisé en ce que le point d'articulation de l'autre plaque d'impact (26, 50) est placé au voisinage de l'orifice de remplissage (31) et qu'à une certaine distance de lui vers le bas, un vérin de positionnement (29, 52) s'articule sur cette autre plaque d'impact (26, 50).
  7. Broyeur à impact suivant la revendication 6, caractérisé en ce qu'au vérin de positionnement (29, 52) est associé un dispositif de vibration.
  8. Broyeur à impact suivant l'une quelconque des revendications 5 à 7, caractérisé en ce que l'extrémité supérieure de l'autre plaque d'impact (50) arrive presque contre l'extrémité supérieure de la deuxième partie de carter (12), dans sa position relevée.
  9. Broyeur à impact suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que, sur le rotor (16), on peut monter, à volonté, des barreaux de percussion (17) ou des outils formant couteaux (42), connus en eux-mêmes.
  10. Broyeur à impact suivant la revendication 9, caractérisé en ce que les outils formant couteaux (42) peuvent être montés sur le rotor (16), à une certaine distance les uns des autres dans la direction axiale, et en ce que l'arête inférieure tournée vers lui de l'autre plaque d'impact (26) présente des évidements (45) qui sont adaptés à la forme des couteaux (42) et qui passent devant les couteaux (42) quand le rotor tourne.
  11. Broyeur à impact suivant la revendication 9 ou la revendication 10, caractérisé en ce que, sur le rotor (16), des barres porte-lames (40) peuvent être montées, sur lequel les outils formant couteaux (42) peuvent être fixés de façon démontable.
  12. Broyeur à impact suivant l'une quelconque des revendications 9 à 11, caractérisé en ce que les outils formant couteaux (42) présentent une arête de coupe (43) inclinée radialement vers l'avant et vers l'extérieur, et ayant une forme d'arc et une forme de U ou de V inversé.
  13. Broyeur à impact suivant l'une quelconque des revendications 1 à 12, caractérisé en ce que le point d'articulation de l'autre plaque d'impact (26, 50) s'articule sur un vérin de positionnement.
  14. Broyeur à impact suivant l'une quelconque des revendications 1 à 13, caractérisé en ce que l'axe de pivotement de la deuxième partie de carter (12) se trouve directement contre la surface d'assise (15).
  15. Broyeur à impact suivant l'une quelconque des revendications 14 à 14, caractérisé en ce que la plaque (55) peut être actionnée par deux vérins de positionnement (56, 57), placés à une certaine distance l'un de l'autre.
EP89124144A 1988-12-31 1989-12-29 Broyeur à impact Expired - Lifetime EP0380811B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3844479 1988-12-31
DE3844479 1988-12-31
DE3939598 1989-11-30
DE3939598A DE3939598C2 (de) 1988-12-31 1989-11-30 Prallbrecher

Publications (3)

Publication Number Publication Date
EP0380811A2 EP0380811A2 (fr) 1990-08-08
EP0380811A3 EP0380811A3 (fr) 1991-04-17
EP0380811B1 true EP0380811B1 (fr) 1994-10-19

Family

ID=25875859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89124144A Expired - Lifetime EP0380811B1 (fr) 1988-12-31 1989-12-29 Broyeur à impact

Country Status (4)

Country Link
EP (1) EP0380811B1 (fr)
AT (1) ATE112979T1 (fr)
ES (1) ES2063110T3 (fr)
FI (1) FI89773C (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703583A1 (de) * 1997-01-31 1998-08-06 Krupp Foerdertechnik Gmbh Prallbrecher
DE19807694A1 (de) * 1998-02-25 1999-08-26 Bayer Vorrichtung zum Aufreißen von Säcken
KR100871307B1 (ko) 2001-07-27 2008-12-01 가부시키가이샤 고마쓰 세이사쿠쇼 파쇄장치, 그의 간격조정장치 및 이들을 탑재한 이동식파쇄기
CN102357376A (zh) * 2011-07-07 2012-02-22 广州迪森热能技术股份有限公司 高油脂生物质燃料粉碎机及其粉碎系统
EP2676731A1 (fr) * 2012-06-20 2013-12-25 Sandvik Intellectual Property AB Goulotte d'alimentation d'un concasseur à impact à arbre horizontal
CN111229375A (zh) * 2020-03-11 2020-06-05 塞尔姆（北京）科技有限责任公司 一种辊式破碎机调节机构
CN113775583A (zh) * 2021-10-18 2021-12-10 成都大宏立机器股份有限公司 一种全自动控制的反击破液压系统及调节方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1807054A1 (de) * 1968-11-05 1970-06-18 Berger Maschf Gmbh Prallmuehle mit auswechselbar und verstellbar im Muehlengehaeuse aufgehaengten Prallschwingen
DE2516014C3 (de) * 1975-04-12 1986-05-28 Hazemag Dr. E. Andreas GmbH & Co, 4400 Münster Zerkleinerungsmaschine für Abfälle
US4597538A (en) * 1984-05-16 1986-07-01 Getz Roland A Asphalt comminuting apparatus

Also Published As

Publication number Publication date
ES2063110T3 (es) 1995-01-01
EP0380811A2 (fr) 1990-08-08
FI89773C (fi) 1993-11-25
EP0380811A3 (fr) 1991-04-17
FI89773B (fi) 1993-08-13
ATE112979T1 (de) 1994-11-15
FI896331A0 (fi) 1989-12-29

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EP0955098A1 (fr) Appareil de désintégration d'objets

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