EP0630349B1 - Safety keg assembly - Google Patents
Safety keg assembly Download PDFInfo
- Publication number
- EP0630349B1 EP0630349B1 EP93906700A EP93906700A EP0630349B1 EP 0630349 B1 EP0630349 B1 EP 0630349B1 EP 93906700 A EP93906700 A EP 93906700A EP 93906700 A EP93906700 A EP 93906700A EP 0630349 B1 EP0630349 B1 EP 0630349B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- keg
- neck
- spear valve
- assembly
- locking elements
- 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
- 235000013405 beer Nutrition 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007789 sealing Methods 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
- This invention relates to a safety keg assembly including a keg and a safety spear valve and also to a safety spear valve.
- a beer keg is usually a substantially cylindrical drum having a mouth at one end which is closed by a spear valve assembly providing access to beer in the keg via a tapping head.
- the spear valve assembly usually comprises a beer valve located in the keg neck which includes a valve body and a valve housing, and a downtube connected to the valve body which extends into the keg.
- a tapping head is connected to the spear valve providing pressure in the form of CO 2 , allowing the beer to be supplied under pressure to a dispensing tap at the bar.
- valve housing and valve body must be coupled together after the valve body with the downtube thereon has been inserted through the keg neck.
- US4509663 discloses an assembly according to the preamble of claims 1 and 6, wherein a keg neck has a blind receiving groove for a lug that extends from a collar for securing a spear valve in the keg neck.
- the lug keys into the groove which comprises an upper and lower vertical section at each end of a horizontal section.
- An object of the present invention is to provide an improved safety keg assembly reducing the risk of a spear valve assembly being accidentally ejected by residual pressure.
- a safety keg assembly comprising a keg having a keg neck, and a keg spear valve assembly releasably fitted in the keg neck, the keg neck having at least one abutment surface having a slot therethrough and the spear valve assembly including a plurality of locking elements axially and circumferentially spaced relative to one another and dimensional to pass through the slot whereby the keg neck and spear valve assembly cooperate together to prevent the spear valve from being blown out by residual pressure in the keg.
- the co-operable abutment surfaces comprise an abutment shoulder on the keg neck having a slot therethrough and at least one projecting locking element on the spear valve assembly dimensioned to pass through the slot.
- the invention also includes a safety keg assembly comprising a keg having a keg neck, and a spear valve releasably fitted in the keg neck, the spear valve having a plurality of locking elements located on and extending outwardly therefrom, the locking elements being axially and circumferentially spaced relative to one another and being arranged such that, once the keg spear valve is inserted into the keg neck, the locking element will prevent the spear valve from being blown out by residual pressure by engaging a shoulder on the keg neck, the assembly and disassembly of the spear valve and the keg neck being facilitated by a slot in the shoulder of the keg neck through which the locking elements can pass.
- the invention also includes a spear valve for the keg assembly as aforesaid and a keg including an access slot for receiving such a spear valve.
- two locking elements are provided, spaced axially and circumferentially, relative to one another.
- two locking elements are provided, the elements being spaced axially from each other and being arranged to be diametrically opposite each other on the spear valve.
- the keg may be provided with a plurality of shoulders spaced axially relative to each other to form one or more channels therebetween, with slots through which the or each locking element can pass.
- the slots in respective shoulders are spaced circumferentially relative to each other.
- the slots in respective shoulders are arranged with substantially the same circumferential and axial displacements therebetween as the circumferential and axial displacements between respective locking elements on the keg spear valve.
- two locking elements and two shoulders may be provided, the shoulders being spaced axially relative to each other, and the two locking elements being spaced axially relative to each other.
- the locking elements are diametrically opposed and the slots in the two shoulders are diametrically opposed.
- a keg (1) has a body (2) and a keg neck (3) defining a mouth (4).
- the mouth (4) of the keg (1) is closed by a spear valve assembly (5) releasably seated within the mouth (4).
- the spear valve assembly (5) and keg (1) are provided with a co-operable safety device (6).
- the safety device (6) comprises locking elements (7) on the spear valve assembly (5) and an abutment shoulder (8) on the keg neck (3).
- the keg neck (3) is a hollow cylinder having a smooth inner portion (9) and a threaded inner portion (10).
- the abutment shoulder (8) is formed on the smooth inner portion (9) and is substantially annular extending inwardly towards the centre of the keg neck (3).
- a slot (11) is cut out of the shoulder (8).
- the keg neck (3) is rigidly secured to the keg body (2), the smooth inner portion (9) being disposed adjacent the keg body (2).
- the keg neck (3) defines the keg mouth (4) and permits access to the inside of the keg (1).
- the spear valve assembly (5) comprises a depending downtube (12), a beer valve indicated generally at (13) and a body (14) disposed around the beer valve (13).
- the body (14) of the spear valve assembly (5) is substantially cylindrical and has three portions (15,16,17); a screw threaded locking ring portion (15) spaced from the downtube (12); a skirt portion (17) adjacent the downtube (12); and a smooth portion (16) located between the screw threaded portion (15) and the skirt portion (17).
- the locking elements (7) are formed in the skirt portion (17) and comprise metallic lugs bent out of the plane of the surface of the skirt (17).
- the two elements (7) are axially spaced from one another on the skirt portion (17) forming an inner locking element adjacent the downtube (12) and an outer locking element (7).
- the locking elements (7) are diametrically opposed and extend outwardly from the body (14) as shown.
- the inner locking element (7) abuts the outer face of the shoulder (8).
- the spear valve (5) is then rotated until the locking element (7) aligns with the shoulder slot (11): the locking element (7) can then pass through the slot. Repeating this rotary action allows the other locking element (7) to pass through the slot (11).
- a bridging washer (18) is also provided, being disposed around the skirt portion (17) and located between the smooth portion (16) and the outer locking element (7), thereby providing a continuous seal reaction face, bridging the shoulder slot (11).
- the spear valve assembly (5) of the first embodiment is inserted, downtube (12) first, into the keg (1) through the keg neck (3).
- the locking elements (7) in turn, abut the outer face of the shoulder (8) and the rotary action described above allows each element (7) to pass in turn through the shoulder slot (11).
- the screw threaded portions (10,15) on the keg neck (3) and valve assembly (5) respectively, threadingly engage with each other and allow the keg neck (3) and valve assembly (5) to be tightened together.
- the smooth portion (16) abuts against the washer (18) which, in turn, abuts the shoulder (8), sealing the slot (11) and thereby the keg (1).
- valve assembly (5) To disassemble the valve assembly (5) from the keg neck (3) (see Figures 5 to 8), the residual pressure in the keg (1) is evacuated and the valve assembly (5) is unscrewed from the keg neck (3).
- the valve assembly (5) When the outer locking element (7) abuts against the abutment shoulder (8), the valve assembly (5) is rotated relative to the keg neck (3) until the locking element corresponds with the slot (11) in the shoulder (8).
- the valve assembly (5) can then be lifted until the inner locking element (7) abuts the shoulder (8).
- the valve assembly (5) is again rotated until the inner locking element (7) can travel through the slot (11) and the valve assembly (5) is then free to be removed from the keg neck (3).
- the spear valve assembly (5) can be unscrewed from the keg neck (3) and at this point the pressure build up in the keg (1) could cause a blow-out.
- the valve assembly (5) is provided with locking elements (7), the outer locking element (7) will abut against the shoulder (8) preventing the spear valve assembly (14) from being blown out and allowing excess pressure to escape.
- the inner locking element (7) acts as a back-up and will itself abut the shoulder (8).
- FIGs 3 and 4 show a slightly different embodiment to that shown in Figures 1 and 2, the safety device being mounted on a different design of spear valve assembly. Parts corresponding to parts in Figures 1 and 2 carry the same reference numerals.
- the safety device is very similar to that shown in Figures 1 and 2, the device simply being adapted to an alternative spear valve assembly (20) which comprises a beer valve (21), a body (22) and a downtube (23).
- the body (22) comprises a smooth portion (16), a skirt (17) and a separate screw threaded locking ring portion (15).
- the skirt (17) is formed integrally with the downtube (23).
- the locking elements (7) are axially displaced and formed diametrically opposed in the skirt (17) so as to extend radially outwardly therefrom.
- the keg neck (3) is substantially as described above.
- the locking elements (7) are sections of the skirt (17) bent away from the axis of the spear valve to form lugs whereby insertion and removal of the spear valve is only possible by alignment with the or each slot in the keg shoulder as described.
Landscapes
- Devices For Dispensing Beverages (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Mechanically-Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
Description
- This invention relates to a safety keg assembly including a keg and a safety spear valve and also to a safety spear valve.
- A beer keg is usually a substantially cylindrical drum having a mouth at one end which is closed by a spear valve assembly providing access to beer in the keg via a tapping head. The spear valve assembly usually comprises a beer valve located in the keg neck which includes a valve body and a valve housing, and a downtube connected to the valve body which extends into the keg. On site, a tapping head is connected to the spear valve providing pressure in the form of CO2, allowing the beer to be supplied under pressure to a dispensing tap at the bar.
- We have found that problems can occur when the spear valve is being removed from the keg if there is residual CO2 pressure within the keg. If this gas is not evacuated prior to an attempt to open the keg, it can result in the spear valve being blown out of the keg by the residual gas. This is, of course, very dangerous and likely to cause injury, particularly in the event of unauthorized or unskilled attempts at removal of the spear valve.
- This problem has been addressed before, for example, in GB-2188040 where a projection is provided on the valve assembly which engages against the inside of the keg neck in the event of a release under pressure.
- In that design, however, there is an awkward assembly arrangement whereby the valve housing and valve body must be coupled together after the valve body with the downtube thereon has been inserted through the keg neck.
- US4509663 (Fallon) discloses an assembly according to the preamble of
claims 1 and 6, wherein a keg neck has a blind receiving groove for a lug that extends from a collar for securing a spear valve in the keg neck. The lug keys into the groove which comprises an upper and lower vertical section at each end of a horizontal section. - An object of the present invention is to provide an improved safety keg assembly reducing the risk of a spear valve assembly being accidentally ejected by residual pressure. According to the present invention, there is provided a safety keg assembly comprising a keg having a keg neck, and a keg spear valve assembly releasably fitted in the keg neck, the keg neck having at least one abutment surface having a slot therethrough and the spear valve assembly including a plurality of locking elements axially and circumferentially spaced relative to one another and dimensional to pass through the slot whereby the keg neck and spear valve assembly cooperate together to prevent the spear valve from being blown out by residual pressure in the keg.
- Thus, if it happens that one locking element is aligned with the slot when a residual pressure causes the spear valve to blow out, the ejection of the spear valve will be prevented by another element, spaced from the slot, engaging the shoulder.
- Preferably the co-operable abutment surfaces comprise an abutment shoulder on the keg neck having a slot therethrough and at least one projecting locking element on the spear valve assembly dimensioned to pass through the slot.
- The invention also includes a safety keg assembly comprising a keg having a keg neck, and a spear valve releasably fitted in the keg neck, the spear valve having a plurality of locking elements located on and extending outwardly therefrom, the locking elements being axially and circumferentially spaced relative to one another and being arranged such that, once the keg spear valve is inserted into the keg neck, the locking element will prevent the spear valve from being blown out by residual pressure by engaging a shoulder on the keg neck, the assembly and disassembly of the spear valve and the keg neck being facilitated by a slot in the shoulder of the keg neck through which the locking elements can pass. In that way, the spear valve and keg can be assembled and disassembled without the need for special tooling and a safety device is provided to prevent the spear valve from being blown out of the keg. The invention also includes a spear valve for the keg assembly as aforesaid and a keg including an access slot for receiving such a spear valve.
- In a preferred embodiment, two locking elements are provided, spaced axially and circumferentially, relative to one another.
- In the most preferred embodiment, two locking elements are provided, the elements being spaced axially from each other and being arranged to be diametrically opposite each other on the spear valve.
- The keg may be provided with a plurality of shoulders spaced axially relative to each other to form one or more channels therebetween, with slots through which the or each locking element can pass. Preferably the slots in respective shoulders are spaced circumferentially relative to each other. In a preferred embodiment, the slots in respective shoulders are arranged with substantially the same circumferential and axial displacements therebetween as the circumferential and axial displacements between respective locking elements on the keg spear valve.
- If desired, two locking elements and two shoulders may be provided, the shoulders being spaced axially relative to each other, and the two locking elements being spaced axially relative to each other. In this arrangement, the locking elements are diametrically opposed and the slots in the two shoulders are diametrically opposed.
- The invention will now be described by way of example with reference to the accompanying drawings in which:
- Figure 1 is a cross-section of one embodiment of a keg spear valve assembly in accordance with the invention, the keg neck being shown dotted and the keg body shown dotted and broken away;
- Figure 2 is a perspective view of part of the spear valve assembly shown in Figure 1;
- Figure 3 is a cross-section of an alternative embodiment of the invention applied to a different design of spear valve assembly to that shown in Figure 1;
- Figure 4 is a perspective view of part of the spear valve assembly shown in Figure 3;
- Figure 5 is a perspective view of the keg neck of the keg for use with the spear valve assemblies of Figures 1 and 3;
- Figure 6 is a plan view of the keg neck shown in Figure 5;
- Figure 7 is a diagrammatic plan view of a spear valve assembly showing the projecting locking elements; and
- Figure 8 is a plan view of the spear valve assembly of Figure 7 inserted in the keg neck in the 'half open' position.
- In the drawings a keg (1) has a body (2) and a keg neck (3) defining a mouth (4). The mouth (4) of the keg (1) is closed by a spear valve assembly (5) releasably seated within the mouth (4). In order to prevent the spear valve assembly (5) from being accidentally ejected from the keg (1) by residual pressure within the keg (1) at the time of release, the spear valve assembly (5) and keg (1) are provided with a co-operable safety device (6). The safety device (6) comprises locking elements (7) on the spear valve assembly (5) and an abutment shoulder (8) on the keg neck (3).
- The keg neck (3), see Figures 5 and 6, is a hollow cylinder having a smooth inner portion (9) and a threaded inner portion (10). The abutment shoulder (8) is formed on the smooth inner portion (9) and is substantially annular extending inwardly towards the centre of the keg neck (3). A slot (11) is cut out of the shoulder (8). The keg neck (3) is rigidly secured to the keg body (2), the smooth inner portion (9) being disposed adjacent the keg body (2). The keg neck (3) defines the keg mouth (4) and permits access to the inside of the keg (1).
- In the embodiment of Figures 1 and 2 the spear valve assembly (5) comprises a depending downtube (12), a beer valve indicated generally at (13) and a body (14) disposed around the beer valve (13). The body (14) of the spear valve assembly (5) is substantially cylindrical and has three portions (15,16,17); a screw threaded locking ring portion (15) spaced from the downtube (12); a skirt portion (17) adjacent the downtube (12); and a smooth portion (16) located between the screw threaded portion (15) and the skirt portion (17). The locking elements (7) are formed in the skirt portion (17) and comprise metallic lugs bent out of the plane of the surface of the skirt (17). The two elements (7) are axially spaced from one another on the skirt portion (17) forming an inner locking element adjacent the downtube (12) and an outer locking element (7). The locking elements (7) are diametrically opposed and extend outwardly from the body (14) as shown. On insertion of the spear valve into the keg neck, the inner locking element (7) abuts the outer face of the shoulder (8). The spear valve (5) is then rotated until the locking element (7) aligns with the shoulder slot (11): the locking element (7) can then pass through the slot. Repeating this rotary action allows the other locking element (7) to pass through the slot (11). A bridging washer (18) is also provided, being disposed around the skirt portion (17) and located between the smooth portion (16) and the outer locking element (7), thereby providing a continuous seal reaction face, bridging the shoulder slot (11).
- To assemble the spear valve assembly (5) of the first embodiment into the keg (1), the spear valve assembly (15) is inserted, downtube (12) first, into the keg (1) through the keg neck (3). The locking elements (7) in turn, abut the outer face of the shoulder (8) and the rotary action described above allows each element (7) to pass in turn through the shoulder slot (11). Once both elements (7) are past the shoulder (8), the screw threaded portions (10,15) on the keg neck (3) and valve assembly (5) respectively, threadingly engage with each other and allow the keg neck (3) and valve assembly (5) to be tightened together. Once assembled, the smooth portion (16) abuts against the washer (18) which, in turn, abuts the shoulder (8), sealing the slot (11) and thereby the keg (1).
- To disassemble the valve assembly (5) from the keg neck (3) (see Figures 5 to 8), the residual pressure in the keg (1) is evacuated and the valve assembly (5) is unscrewed from the keg neck (3). When the outer locking element (7) abuts against the abutment shoulder (8), the valve assembly (5) is rotated relative to the keg neck (3) until the locking element corresponds with the slot (11) in the shoulder (8). The valve assembly (5) can then be lifted until the inner locking element (7) abuts the shoulder (8). The valve assembly (5) is again rotated until the inner locking element (7) can travel through the slot (11) and the valve assembly (5) is then free to be removed from the keg neck (3).
- In the event of an attempt to disassemble the spear valve assembly (5) without evacuating the residual pressure in the keg (1), the spear valve assembly (5) can be unscrewed from the keg neck (3) and at this point the pressure build up in the keg (1) could cause a blow-out. However, as the valve assembly (5) is provided with locking elements (7), the outer locking element (7) will abut against the shoulder (8) preventing the spear valve assembly (14) from being blown out and allowing excess pressure to escape. In the unlikely event that the outer locking element (7) happens to be aligned with the slot (11) when blow-out occurs, the inner locking element (7) acts as a back-up and will itself abut the shoulder (8).
- Figures 3 and 4 show a slightly different embodiment to that shown in Figures 1 and 2, the safety device being mounted on a different design of spear valve assembly. Parts corresponding to parts in Figures 1 and 2 carry the same reference numerals. The safety device is very similar to that shown in Figures 1 and 2, the device simply being adapted to an alternative spear valve assembly (20) which comprises a beer valve (21), a body (22) and a downtube (23). The body (22) comprises a smooth portion (16), a skirt (17) and a separate screw threaded locking ring portion (15). The skirt (17) is formed integrally with the downtube (23). As in the above embodiment, the locking elements (7) are axially displaced and formed diametrically opposed in the skirt (17) so as to extend radially outwardly therefrom. The keg neck (3) is substantially as described above.
- The alternative design of Figures 3 and 4 is assembled and disassembled in substantially the same way as described with reference to the embodiment of Figures 1 and 2.
- In both embodiments, the locking elements (7) are sections of the skirt (17) bent away from the axis of the spear valve to form lugs whereby insertion and removal of the spear valve is only possible by alignment with the or each slot in the keg shoulder as described.
Claims (7)
- A safety keg assembly comprising a keg (1) having a keg neck (3), and a keg spear valve assembly (5) releasably fitted in the keg neck,the keg neck having at least one abutment surface (8) having a slot (11) and the spear valve assembly including a plurality of locking elements (7), characterised in that the slot passes through the abutment surface and the locking elements are axially and circumferentially spaced relative to one another and dimensioned to pass through the slot (11) whereby the keg neck and spear valve assembly co-operate together to prevent the spear valve from being blown out by residual pressure in the keg.
- A safety keg assembly according to claim 1, wherein the abutment surface (8) on the keg neck comprises an annular shoulder on the neck.
- A safety keg assembly according to claim 1 or 2, comprising two locking elements (7) axially spaced and circumferentially spaced to one another.
- A safety keg assembly according to claim 1, wherein the keg neck (3) includes a plurality of arcuate shoulders axially spaced relative to one another to form one or more channels therebetween each shoulder being arranged to provide a passage through which the or each locking element can pass, the passages being angularly displaced.
- A safety keg assembly according to claim 4, wherein the passages are slots in the shoulders.
- A safety keg assembly comprising a keg (1) having a keg neck (3) presenting a shoulder (8),
and a spear valve (5) releasably fitted in the keg neck, the spear valve having a plurality of locking elements (7) located on and extending outwardly therefrom, characterised by the locking elements being axially and circumferentially spaced relative to one another and being arranged such that, once the keg spear valve is inserted into the keg neck, the locking elements will prevent the spear valve from being blown out by residual pressure by engaging a shoulder on the keg neck, the assembly and disassembly of the spear valve and the keg neck being facilitated by a slot (11) in the shoulder (8) of the keg neck through which the locking elements can pass. - A spear valve (5) for a safety keg assembly according to any one of claims 1 to 6, comprising a plurality of locking elements (7) extending outwardly therefrom and being axially and circumferentially spaced relative to one another.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929206212A GB9206212D0 (en) | 1992-03-21 | 1992-03-21 | A safety device |
GB9206212 | 1992-03-21 | ||
PCT/GB1993/000561 WO1993019003A1 (en) | 1992-03-21 | 1993-03-18 | Safety keg assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0630349A1 EP0630349A1 (en) | 1994-12-28 |
EP0630349B1 true EP0630349B1 (en) | 1996-11-20 |
Family
ID=10712599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93906700A Expired - Lifetime EP0630349B1 (en) | 1992-03-21 | 1993-03-18 | Safety keg assembly |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0630349B1 (en) |
AU (1) | AU3760893A (en) |
ES (1) | ES2096280T3 (en) |
GB (2) | GB9206212D0 (en) |
WO (1) | WO1993019003A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3725242B2 (en) * | 1996-04-12 | 2005-12-07 | サントリー株式会社 | Spear tube of beer barrel |
WO1999048801A1 (en) * | 1998-03-24 | 1999-09-30 | Spears Limited | Blow-out preventing device for a spear valve |
US8833078B2 (en) | 2009-02-27 | 2014-09-16 | D2Bg Llc | Compressed gas-driven device with passive thermodynamic composition |
US8635873B2 (en) | 2009-02-27 | 2014-01-28 | D2Bg Llc | Compressed gas-driven device with passive thermodynamic composition |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2075476B (en) * | 1980-04-22 | 1983-12-07 | Alumasc Ltd | Valve-type closure for containers |
US4406301A (en) * | 1981-04-07 | 1983-09-27 | Vending Components, Inc. | Keg-tapping structure |
US4509663A (en) * | 1982-03-29 | 1985-04-09 | Draft Systems, Inc. | Locking mechanism and valve assembly |
GB2158906B (en) * | 1984-05-18 | 1988-02-17 | Micro Matic As | Valve closure for kegs |
-
1992
- 1992-03-21 GB GB929206212A patent/GB9206212D0/en active Pending
-
1993
- 1993-03-18 WO PCT/GB1993/000561 patent/WO1993019003A1/en active IP Right Grant
- 1993-03-18 EP EP93906700A patent/EP0630349B1/en not_active Expired - Lifetime
- 1993-03-18 ES ES93906700T patent/ES2096280T3/en not_active Expired - Lifetime
- 1993-03-18 GB GB9418943A patent/GB2279340B/en not_active Expired - Fee Related
- 1993-03-18 AU AU37608/93A patent/AU3760893A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
ES2096280T3 (en) | 1997-03-01 |
AU3760893A (en) | 1993-10-21 |
GB9206212D0 (en) | 1992-05-06 |
GB9418943D0 (en) | 1994-11-09 |
GB2279340A (en) | 1995-01-04 |
EP0630349A1 (en) | 1994-12-28 |
WO1993019003A1 (en) | 1993-09-30 |
GB2279340B (en) | 1995-11-08 |
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