EP0623550B1 - Valve device for transportable containers for liquid under pressure - Google Patents
Valve device for transportable containers for liquid under pressure Download PDFInfo
- Publication number
- EP0623550B1 EP0623550B1 EP94201244A EP94201244A EP0623550B1 EP 0623550 B1 EP0623550 B1 EP 0623550B1 EP 94201244 A EP94201244 A EP 94201244A EP 94201244 A EP94201244 A EP 94201244A EP 0623550 B1 EP0623550 B1 EP 0623550B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- catch
- protrusions
- finger
- riser pipe
- 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
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000003380 propellant Substances 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 229910000639 Spring steel Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 claims 1
- 235000013405 beer Nutrition 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0829—Keg connection means
- B67D1/0831—Keg connection means combined with valves
- B67D1/0838—Keg connection means combined with valves comprising means for preventing blow-out on disassembly of the spear valve
Definitions
- the present invention refers to a valve device in particular for a transportable container of the type adapted to store and deliver a liquid under pressure from a propellant gas.
- These types of containers provided with said devices are generally used for the distribution of drinks or liquids in general. Said devices are used particularly in beer containers with an open delivery, said beer containers being kegs with a tap.
- each container is provided with a double valve which has both a gas passage and an outlet passage for the liquid from the container by means of the pressure of the gas itself.
- This valve is generally mounted on a stub which is mounted in an opening on the upper part of the container; and in some cases, this mounting is done simply with threaded connection means, involving the risk that the valve can cause considerable damage because it could easily come off before the pressure of the gas of the container has been completely released and can, thus, be ejected with a great force by this pressure immediately when the threading is loosened.
- valve is mounted in such a way that it cannot completely or partially be removed from the container until the pressure in same is released completely and, thus, the above-mentioned risk is fundamentally eliminated.
- a device of this type in which the safety system is realized through a catch placed in an opening of the valve housing and is adapted to rier around the lower border of the opening, is known from WO 91/02694 which is considered the closest prior art and on which is based the pre-characterizing part of claim 1.
- the catch of the above patent is provided with a protrusion toward the inside of the valve on which a finger will act, which moves co-axially to the valve so that in the bottom position of the stroke, said catch, by rotating around the lower border of the opening, is retracted in the sectional shape of the valve in such a way that the valve itself can be dlsmounted.
- the catch leans against the lower border of a proper opening present in the valve housing; again around said lower border the rotation of said catch occurs in the above-described manner.
- the fact that the rotation occurs around said lower border of the opening implies that said catch is of a form such that, also in the position in which the catch retracts for the disassembly of the entire valve complex, there is always a small lower part of said catch protruding from said valve housing: this small lower part very often causes difficulties of disassembly since it interferes with the hub on which is mounted the device.
- the object of the present invention is to provide an improvement to the valves of the above-mentioned type, which cannot be removed competely from the containter before the pressure in same has been released; to provide a device which has a simpler and less costly structure which can be mounted and disassembled more easily and quickly than the known art without requiring high machining tolerances and continuous adjustments.
- valve device mounted on keg containers particularly for the distribution of beer and other drinks according to the present invention is characterized by the characterizing features set forth in independent claim 1. Further advantageous characteristics of the invention are set forth in the dependent claims.
- valve is mounted on a hub 80 through a simple threading, said hub being connected in an opening placed on the upper part of the container 78 containing a liquid to be delivered.
- Said container can be made of aluminum, plastics, stainless steel or any other material.
- the valve 10 comprises an outer housing 12 which is kept against a ring 14 which acts as a sealing gasket between said external housing and said hub.
- a riser pipe part 30 is mounted co-axially on the inside of the valve housing 16.
- Said riser pipe part 30 comprises a tube 32, of whose shape only the upper part can be seen in the figure, and a valve ring 34, which is positioned on the upper part of the tube 32 and is supported by a collar 36 on same.
- the valve ring 34 is realized with an elastic material (e.g., rubber) into which is inserted a reinforcing disk to stabilize the form.
- the valve ring 34 On the inside, the valve ring 34 has an opening 38 which, when the valve is not activated, is kept closed by a ring nut 40 by means of a compression spring 42 positioned on the inside of the tube 32 and which leans downward against a protruding surface on the inside of said tube 32.
- valve ring 34 has a joined conical surface 48 which, when the valve is not activated and maintained against a joined conical surface 18 present on the inside of said valve housing 16 by means of a spring 20 which leans upward against a disk 44, leaning, in turn, against a collar 36 integral with the upper part of the tube 32.
- said spring 20 is supported by a sealing ring 46 which is used, through a certain number of protrusions integral with the external housing of the valve, with the housing itself, allowing to tighten together the various components of the valves 12 to attain the assembly.
- Fig. 1 also illustrates a head 100 coupled to the upper part of said valve through a coupling pin 52. Through said head 100, propellant gas is added to make the liquid contained in the container to be ejected through a proper outlet 102.
- the liquid contained in the container can be a drink (e.g., beer, wine or mineral water). It is also possible to use the same apparatus to distribute other products, such as liquid pesticides used in the field of agriculture.
- a drink e.g., beer, wine or mineral water. It is also possible to use the same apparatus to distribute other products, such as liquid pesticides used in the field of agriculture.
- the head 100 is provided with a handle 104 that can be pressed at its end, making it rotate around the pivot pin 106: thus, an upper position is attained in which the valve is closed and a lower position in which the valve is open, permitting the gas to exit from its container by means of a passage 108, provided with a check valve 110.
- the pressure of said gas acts to make said liquid go out from said outlet 102.
- the riser pipe part In said position, the riser pipe part can be moved axially from below said lower position in contrast with the action of said spring 20.
- valve 10 is mounted on the tube only through a simple threading in the illustrated example.
- connection can, however, be used, but they do not offer the guarantee of safety at the moment of disassembly of the valve itself from where it is attached. That is due, essentially, to the possibility, as already indicated, of the continued presence of gas under pressure in the container and, thus, said gas can eject said valve with a great force, causing possible harm to the person holding it.
- the lower part of the external housing of the present invention is provided with a catch 70 (Figs. 4-8) which leans against said sealing ring 46, and with one or more protrusions 72, which extend to the outside of the external housing of the valve 12 through proper openings present on said walls.
- Said catch 70 has a vertical wall 74 and two fins 76.
- Said vertical wall 74 is placed between said protrusions 72 and is perpendicular to same.
- Said fins are essentially comprised of extensions perpendicular to said protrusions 72 and placed toward the inner side of said external housing of the valve.
- said vertical wall 74 leans on the internal part of said external housing 12 of the valve in the portion between the openings which allow the ejection of said protrusions 72 (Fig. 3).
- Said finger 78 has an end integral with said disk 44 and is realized with an elastic material such as corrosion-resistant steel springs, also having a free end part spaced from the top and from the axis of the riser pipe part 30 such that the mounted valve cannot be completely disassemblyed in any position of the part of the riser pipe part except beyond the normal working stroke.
- an elastic material such as corrosion-resistant steel springs
- said fins are positioned so as to be used with said finger end 78 when the riser pipe part is beyond the normal working stroke, permitting, as such, the disassemblying of the device with proper equipment.
Landscapes
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Devices For Dispensing Beverages (AREA)
- Reciprocating Pumps (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
Description
- The present invention refers to a valve device in particular for a transportable container of the type adapted to store and deliver a liquid under pressure from a propellant gas.
- These types of containers provided with said devices are generally used for the distribution of drinks or liquids in general. Said devices are used particularly in beer containers with an open delivery, said beer containers being kegs with a tap.
- In the prior art, different valve devices on transportable containers of the above-mentioned type are known. For this function, each container is provided with a double valve which has both a gas passage and an outlet passage for the liquid from the container by means of the pressure of the gas itself.
- This valve is generally mounted on a stub which is mounted in an opening on the upper part of the container; and in some cases, this mounting is done simply with threaded connection means, involving the risk that the valve can cause considerable damage because it could easily come off before the pressure of the gas of the container has been completely released and can, thus, be ejected with a great force by this pressure immediately when the threading is loosened.
- In other cases, the valve is mounted in such a way that it cannot completely or partially be removed from the container until the pressure in same is released completely and, thus, the above-mentioned risk is fundamentally eliminated.
- A device of this type, in which the safety system is realized through a catch placed in an opening of the valve housing and is adapted to rier around the lower border of the opening, is known from WO 91/02694 which is considered the closest prior art and on which is based the pre-characterizing part of claim 1. The catch of the above patent is provided with a protrusion toward the inside of the valve on which a finger will act, which moves co-axially to the valve so that in the bottom position of the stroke, said catch, by rotating around the lower border of the opening, is retracted in the sectional shape of the valve in such a way that the valve itself can be dlsmounted.
- The inconveniences which this solution presents are several: the assembly of the valve is very complicated since the insertion of the catch into the opening does not allow the positioning of the finger without proper equipment; regarding maintenance of the valves, that represents a considerable rise in costs; lastly, since the retraction of the catch is effected by the finger which acts on the lower protrusion of the same finger, this occurs only at the end of the active stroke of the special wrench, with the need to regulate with absolute precision the stroke of same. It could easily be that the normal machining, mounting, and wear tolerances of the pieces cause an incomplete retraction for the catch or cause reciprocal forcing of the numerous elements involved.
- Further, as indicated above, in the known devices, the catch leans against the lower border of a proper opening present in the valve housing; again around said lower border the rotation of said catch occurs in the above-described manner. The fact that the rotation occurs around said lower border of the opening implies that said catch is of a form such that, also in the position in which the catch retracts for the disassembly of the entire valve complex, there is always a small lower part of said catch protruding from said valve housing: this small lower part very often causes difficulties of disassembly since it interferes with the hub on which is mounted the device.
- The object of the present invention is to provide an improvement to the valves of the above-mentioned type, which cannot be removed competely from the containter before the pressure in same has been released; to provide a device which has a simpler and less costly structure which can be mounted and disassembled more easily and quickly than the known art without requiring high machining tolerances and continuous adjustments.
- The valve device mounted on keg containers particularly for the distribution of beer and other drinks according to the present invention is characterized by the characterizing features set forth in independent claim 1. Further advantageous characteristics of the invention are set forth in the dependent claims.
- The characteristics of the present invention will be more evident from the description which follows and from the attached drawings in which the various figures show:
- - Fig. 1:
- Frontal view of valve device, partially by cross-section, on which is mounted the head comprising the outlet liquid passage of the entrance of the gas and the handle for the actuation of the entire device;
- - Fig. 2:
- Frontal view of valve device on which is mounted the head-tool necessary to disassembly the valve device from the container to which it is connected;
- - Fig. 3:
- Detailed frontal view of the fins of the catch;
- - Fig. 4:
- Detailed isometric view on a scale of 4 : 1 of the catch;
- - Fig. 5:
- Isometric cross-sectional view on a scale of 4:1 of the catch;
- - Fig. 6:
- Detailed view of coupling between catch and finger;
- - Fig. 7:
- Detailed cross-sectional view of coupling between catch and finger;
- - Fig. 8:
- Detailed view from above showing the ejecting of the fins of the catch.
- In Fig. 1, the valve is mounted on a
hub 80 through a simple threading, said hub being connected in an opening placed on the upper part of thecontainer 78 containing a liquid to be delivered. Said container can be made of aluminum, plastics, stainless steel or any other material. - The
valve 10 comprises anouter housing 12 which is kept against aring 14 which acts as a sealing gasket between said external housing and said hub. - A
riser pipe part 30 is mounted co-axially on the inside of thevalve housing 16. Saidriser pipe part 30 comprises atube 32, of whose shape only the upper part can be seen in the figure, and avalve ring 34, which is positioned on the upper part of thetube 32 and is supported by acollar 36 on same. - The
valve ring 34 is realized with an elastic material (e.g., rubber) into which is inserted a reinforcing disk to stabilize the form. On the inside, thevalve ring 34 has anopening 38 which, when the valve is not activated, is kept closed by aring nut 40 by means of acompression spring 42 positioned on the inside of thetube 32 and which leans downward against a protruding surface on the inside of saidtube 32. - Externally, the
valve ring 34 has a joinedconical surface 48 which, when the valve is not activated and maintained against a joinedconical surface 18 present on the inside of saidvalve housing 16 by means of aspring 20 which leans upward against adisk 44, leaning, in turn, against acollar 36 integral with the upper part of thetube 32. Below, saidspring 20 is supported by asealing ring 46 which is used, through a certain number of protrusions integral with the external housing of the valve, with the housing itself, allowing to tighten together the various components of thevalves 12 to attain the assembly. - Fig. 1 also illustrates a
head 100 coupled to the upper part of said valve through acoupling pin 52. Through saidhead 100, propellant gas is added to make the liquid contained in the container to be ejected through aproper outlet 102. - The liquid contained in the container can be a drink (e.g., beer, wine or mineral water). It is also possible to use the same apparatus to distribute other products, such as liquid pesticides used in the field of agriculture.
- The
head 100 is provided with ahandle 104 that can be pressed at its end, making it rotate around the pivot pin 106: thus, an upper position is attained in which the valve is closed and a lower position in which the valve is open, permitting the gas to exit from its container by means of apassage 108, provided with acheck valve 110. The pressure of said gas acts to make said liquid go out from saidoutlet 102. - Through the action of a proper head-tool 50 (see Fg. 2) coupled to the upper part of said valve in an analogous way to that done for
head 100, a third position in attained, defined as a bottom position. - In said position, the riser pipe part can be moved axially from below said lower position in contrast with the action of said
spring 20. - As mentioned above, said
valve 10 is mounted on the tube only through a simple threading in the illustrated example. - Other types of connection can, however, be used, but they do not offer the guarantee of safety at the moment of disassembly of the valve itself from where it is attached. That is due, essentially, to the possibility, as already indicated, of the continued presence of gas under pressure in the container and, thus, said gas can eject said valve with a great force, causing possible harm to the person holding it.
- To eliminate this risk, the lower part of the external housing of the present invention is provided with a catch 70 (Figs. 4-8) which leans against said sealing
ring 46, and with one ormore protrusions 72, which extend to the outside of the external housing of thevalve 12 through proper openings present on said walls. Saidcatch 70 has avertical wall 74 and twofins 76. Saidvertical wall 74 is placed between saidprotrusions 72 and is perpendicular to same. Said fins are essentially comprised of extensions perpendicular to saidprotrusions 72 and placed toward the inner side of said external housing of the valve. - When said
protrusions 72 are extracted, saidvertical wall 74 leans on the internal part of saidexternal housing 12 of the valve in the portion between the openings which allow the ejection of said protrusions 72 (Fig. 3). - Against said
vertical walls 74, on the face turning toward the internal side of the walls of saidexternal housing 12 of the valve, the free end of afinger 78 acts, maintaining the catch depressed in the safety position; that is, with saidprotrusions 72 turning outward. - Said
finger 78 has an end integral with saiddisk 44 and is realized with an elastic material such as corrosion-resistant steel springs, also having a free end part spaced from the top and from the axis of theriser pipe part 30 such that the mounted valve cannot be completely disassemblyed in any position of the part of the riser pipe part except beyond the normal working stroke. - Moreover, said fins are positioned so as to be used with said
finger end 78 when the riser pipe part is beyond the normal working stroke, permitting, as such, the disassemblying of the device with proper equipment. - At this point, the advantages which the present invention provides are evident, and in particular, the mounting facility of said valve and of said
catch 70 is increased with respect to the known art, further avoiding the use of particular equipment and specialized labor. It is noteworthy that the retraction of the catch is complete and prohibits, contrary to that of the known art, all possible intereference between said catch and the hub on which the entire device is mounted during the disassembly operation. Naturally, this mounting and disassembling facility translates into a reduction in cost, taking into account also maintenance operations. - The retraction of the catch occurs not only at the lower bottom position but also next to this said position. This prohibits that, due to wear and tear or unrespected machining tolerances, there be an incomplete retraction of the catch and, thus, a difficulty of disassembly of the valve. Thus, a continuous regulation of the stroke of disassembling equipment, as in the prior art, is rendered unnecessary.
Claims (3)
- Valve device particularly for transportable containers of the type adapted to store and deliver a liquid under pressure from a propellant gas, comprising a ring-shaped hub (80) secured in an upward opening in a container; a double valve (10) having both a blockable gas passage and a blockable liquid passage and essentially consisting of a valve housing (12), which can be detachably mounted on the hub (80) and a riser pipe part arranged co-axially to an upper reception area of the valve housing such that said riser pipe part can be displaced axially from an upper closed valve position to a lower open valve position against the pressure from a spring (20) which is supported by a sealing ring (46) and mounted in the valve housing (12) in which said riser pipe can be further displaced partially axially downwardly from the lower open position to a lower bottom position; a finger (78) protruding toward the outside integral with said riser pipe, said finger being realized with elastic material, such as a corrosion-resistant spring steel, with a free end part spaced from the top and from the axis from the riser pipe with said finger arranged such that its free end is forced outward toward the internal wall of a lower part of the wall of said valve housing (12); a catch (70) arranged in an opening in said lower part of said wall of said valve housing (12), said catch having a pair of protrusions (72) which are projected outside of the wall of the valve housing (12) through proper openings present on said valve housing wall, said catch further having a vertical wall (74) and a fin (76), said protrusions being extensions of said vertical wall (74) and folded at a right angle to it, characterized in that a further fin (76) is provided, both said fins (76) being essentially formed as extensions of said two protrusions (72), curved essentially at 90° with respect to them and fundamentally placed one facing each other on the internal side of said valve housing (12) at a distance of the lower end of the vertical wall (74), within the space between the face of said vertical wall (74) facing toward the axis of the valve device and said two fins (76) acting the free end of said finger (78), thus maintaining the catch depressed in a safety position with said protrusions (72) extended outwardly, said fins (76) being positioned so as to be used with the end of said finger (78) when the riser pipe part is beyond the normal working stroke, thereby allowing the retraction of said protrusions (72) and, thus, the disassembly of the device.
- Valve device according to claim 1 characterized in that the bottom part of said catch (70) leans against said ring (46) of said valve and, when said protrusions (72) are extracted, said vertical wall (74) leans on the internal part of said external housing (12).
- Valve device according to claim 1 or 2, characterized in that one single opening is provided for each protrusions (72), the internal part of said external housing (12) against which said vertical wall (74) leans when said protrusions (72) are extracted being between said protrusions (72).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI930899A IT1272413B (en) | 1993-05-06 | 1993-05-06 | VALVE DEVICE FOR TRANSPORTABLE CONTAINERS FOR PRESSURIZED LIQUIDS |
ITMI930899 | 1993-05-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0623550A2 EP0623550A2 (en) | 1994-11-09 |
EP0623550A3 EP0623550A3 (en) | 1995-03-08 |
EP0623550B1 true EP0623550B1 (en) | 1997-09-17 |
Family
ID=11366025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94201244A Expired - Lifetime EP0623550B1 (en) | 1993-05-06 | 1994-05-04 | Valve device for transportable containers for liquid under pressure |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0623550B1 (en) |
AT (1) | ATE158261T1 (en) |
DE (1) | DE69405637T2 (en) |
DK (1) | DK0623550T3 (en) |
IT (1) | IT1272413B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE155117T1 (en) * | 1995-03-31 | 1997-07-15 | Micro Matic As | SAFETY DEVICE FOR KEGAR FITTING |
GB9724226D0 (en) * | 1997-11-18 | 1998-01-14 | Skerra Pty Ltd | Safety device |
GB9724224D0 (en) * | 1997-11-18 | 1998-01-14 | Skerra Pty Ltd | Safety plate |
JP3987181B2 (en) * | 1998-01-20 | 2007-10-03 | サントリー株式会社 | Loosening method and loosening device for inner lid of container |
GB9904389D0 (en) * | 1998-10-06 | 1999-04-21 | Leer Koninklijke Emballage | Closure valves |
IT1318915B1 (en) * | 2000-09-22 | 2003-09-19 | Odl Srl | EXTRACTION VALVE FOR DRUMS CONTAINING LIQUIDS UNDER PRESSURE |
US6367660B1 (en) * | 2001-09-20 | 2002-04-09 | Chang Kung-Chien | Safety device for a double valve arrangement for beer keg |
EP2625133B1 (en) * | 2010-10-08 | 2015-10-28 | Micro Matic A/S | A dispense head for a dispensing system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK418289A (en) * | 1989-08-24 | 1991-02-25 | Micro Matic As | ANTI-LASHING SECURITY SYSTEM |
DE9105547U1 (en) * | 1991-05-04 | 1991-08-08 | Josef Breitwisch & Co, 5000 Köln | Safety device for beverage barrel |
-
1993
- 1993-05-06 IT ITMI930899A patent/IT1272413B/en active IP Right Grant
-
1994
- 1994-05-04 DE DE69405637T patent/DE69405637T2/en not_active Expired - Fee Related
- 1994-05-04 DK DK94201244.4T patent/DK0623550T3/en active
- 1994-05-04 AT AT94201244T patent/ATE158261T1/en not_active IP Right Cessation
- 1994-05-04 EP EP94201244A patent/EP0623550B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69405637D1 (en) | 1997-10-23 |
ATE158261T1 (en) | 1997-10-15 |
ITMI930899A0 (en) | 1993-05-06 |
ITMI930899A1 (en) | 1994-11-06 |
EP0623550A2 (en) | 1994-11-09 |
DE69405637T2 (en) | 1998-11-26 |
IT1272413B (en) | 1997-06-23 |
DK0623550T3 (en) | 1998-04-27 |
EP0623550A3 (en) | 1995-03-08 |
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