EP0285644B1 - Ventilation device - Google Patents
Ventilation device Download PDFInfo
- Publication number
- EP0285644B1 EP0285644B1 EP19870906828 EP87906828A EP0285644B1 EP 0285644 B1 EP0285644 B1 EP 0285644B1 EP 19870906828 EP19870906828 EP 19870906828 EP 87906828 A EP87906828 A EP 87906828A EP 0285644 B1 EP0285644 B1 EP 0285644B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ventilation device
- door
- air
- elongate member
- conduit
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
- E06B7/10—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses by special construction of the frame members
Definitions
- the present invention relates to a ventilation device for use at a doorway in a building.
- Ventilation air flows between rooms and zones in buildings has been achieved by the provision of ventilation devices in doors and also in partition walls of the building. These devices have been installed by cutting a suitable aperture in the door (or in the partition wall) and fitting the device into the aperture.
- this arrangement has the disadvantages that fitting of the device is awkward and can weaken the door structure, and further there is often a deleterious effect on aesthetic quality of the door or partition wall.
- a ventilation system for use in a window type structure is described in DE-A-1934996, the system including a ventilation duct in a frame part of the window surround whereby ventilation air can pass directly through the frame part between an inlet and an outlet on opposite faces of the frame part, a laterally projecting portion from the frame part constituting a sealed abutment for a movable glazing unit.
- the air outlet includes an air flow control.
- EP-A-0115824 shows a generally similar ventilation system for glazed windows or doors. In this case however the outlet for the air from the system ventilation duct faces downwardly.
- the ventilation duct of this system forms a portion of the actual movable sash or glazing unit of the window as distinct from the window surround, the duct being secured to a frame part of the sash and including means to support a glazing assembly.
- the elongate member is adapted to serve as a top edge member of a doorway.
- a vent 9A is fitted at the top of a door 35.
- the door aperture is provided, in conventional manner, with upright wooden standards 36 and a top transverse standard 37 bounding the wall blockwork 38 surrounding the door aperture.
- the blockwork 38 has plaster surface linings 39, and the normal door facings 40 and bottom skirtings 41 are present.
- Each of the standards 37, 38 includes step of jamb (stop) portions.
- the vent 9A comprises a box condiut structure 42 which can be made by an extrusion process.
- the structure 42 includes an air inlet 24, the outlet 22A being provided with an airflow control comprising a fixed apertured plate 22 and a slidable apertures plate 21 for "hit-and-miss" control with the plate 22.
- the vent conduit structure 42 is secured to the top standard 37, which can be rebated as shown to accept the conduit.
- suitable packing can be provided at zone 37A.
- the vertical leg of the L-shaping conduit 42 presents a wall surface 43 serving as a door stop, and the conduit's vertical leg will have an appropriate length to meet the particular application eg. for fire door use.
- An additional door stop strip 37B is secured to standard 37.
- the ends of the conduit structure 42 are closed by appropriate end caps 15.
- the conduit structure 42 can include a channel to house a fire safety element 44 comprising for example an intumescent fire strip.
- the conduit structure 42 could house baffle means such as for example of cartridge form. Futher, a clip-on cover or nose drip 45 can be located at the inlet 24, especially where the door 35 is an external door (opening outwardly in this case).
- vent 9A provides a very simple efficient and effective means of secondary ventilation through buildings involving the passage of air over the head of the door rather than via vents fitted into apertures in the door, or through an opening in the partition or wall enclosure.
- the conduit structure 42 can comprise a simple extruded box section (with various possible adaptations for fly screens, thermal or sound baffle cartridges as per the window vent type etc.) which replaces the top door stop on the door standard or door set. Individual vents would be cut (to the full internal size of door set)from a long length of extruded section and, along with end caps etc., the full assembly would then be screwed up onto the top standard thus providing the door stop as well as the ventilator.
- the conduit can either be fixed into a pre-rebating standard or planted straight onto the standard as illustrated.
- the door stops can either be "part only” to line through with width of projectiong section of vent unit or packed out and taken full width of door standard without any complications.
- the section could be formed in a number of different materials and could have a number of control systems.
- the system provides the following range of options:
- Fig. 4 shows a typical five apartment house layout demonstrating may of the Enviroment Systems.
- control units for the various window and door vents WV, DV are shown schematically as item C (CO being such units in the open condition).
- the cross hatching shows home areas, specifically the lounge and hall, in a ventilated mode by means of the open control units CO.
- Fig. 5 The embodiment shown in Fig. 5 is applied in a door like the embodiment of Figs. 1 to 3 and like parts carry like reference numerals.
- the door head frame member is formed as a cellular form plastics extrusion 56.
- Integral with the extrusion 56 is a door vent 57 generally similar to the vent 9A of Fig. 1.
- a sound proof baffle could be installed in the vents 52 or 57.
- vent structure formed integral with a metal form frame member at an aperture.
- this metal form frame member could take the form of an aluminium extrusion.
- Figs. 6 and 7 show a vent 9A in accordance with another embodiment of the present invention fitted at the top of doorway 35 - exactly of the construction shown in Fig. 1, and the vent 9A is basically similar to the vents 9A ofthe previous embodiments.
- the conduit 42 is secured by screws 16 to the top standard 37, which can be rebated as shown to accept the conduit.
- suitable packing can be provided at zone 37A.
- the vertical leg of the L-shaped conduit 42 presents a wall surface 43 service as a door stop, and the conduit's vertical leg will have an appropriate length to meet the particular application eg. for fire door use.
- An additional door stop strip 37B is secured to standard 37.
- a horizontal air discharge 22A is present as in the previous embodiment, and again a control strip 21 is provided for air flow control.
- the ends of the conduit 42 can be closed by appropriate end caps 15 as previously and generally like parts carry like reference numerals.
- Each end cap 15 (see Fig. 7) comprises a recessed base part 60 carrying a set of lugs or tongues 61 and 63A with interior corners of the conduit structure 42. Further, the base part 60 presents a laterally directed tab plate 64 on which an end of the air flow control plate 21 is slidable, the tab plate 64 serving to close off a respective end portion of the air flow control 21/22 so that effective air flow control is always possible from zero to maximum rates.
- Cord controls can be fitted or control can be by means of recessed mechanism within vertical door frames of vertical door stops.
- an operating cord 68 is connected to a laterally extending finger grip 23 of the plate 21, and extends to the sides of the vent 9A where it passes through a hole 67 in a downstand bracket 66 on the tab plate 64 and then downwardly to the operating position, so enabling convenient remote control of the vent 9A located at the top door standard.
- a strip 16B is fitted into a recess of the conduit 42 to cover the screwheads of screws fitted through apertures 16A.
- the conduit 42 can comprise a simple extruded box section (with various possible adaptations for fly screens, thermal or sound baffle cartridges as per the window vent type etc.) which replaces the top door stops on the door standard or door set. Individual vents would be cut (to the full internal size of door set) from a long length of extruded section and, along with end caps etc. the full assembly would then be screwed up onto the top standard thus providing the door stop as well as the ventilator.
- the conduit can either be fixed into a prerebated standard or planted straight onto the standard as illustrated.
- the door stops can either be "part only” to line through with width or projecting section of vent unit or packed out and taken full width of door standard without any complications.
- a vent 9A is again provided for the top of a doorway but in compariosn with the vent of Figs. 12-14, the vent of Fig. 15 is designed to include structure replacing the top transverse door standard 37, and for this requirement the conduit 42 includes a back portion 42B.
- the conduit 42 is screwed directly into the top blockwork 38, and the conduit portion 42B can include an access plate 16B for access to fixing screws 16.
Abstract
Description
- The present invention relates to a ventilation device for use at a doorway in a building.
- Ventilation air flows between rooms and zones in buildings has been achieved by the provision of ventilation devices in doors and also in partition walls of the building. These devices have been installed by cutting a suitable aperture in the door (or in the partition wall) and fitting the device into the aperture. However this arrangement has the disadvantages that fitting of the device is awkward and can weaken the door structure, and further there is often a deleterious effect on aesthetic quality of the door or partition wall.
- A ventilation system for use in a window type structure is described in DE-A-1934996, the system including a ventilation duct in a frame part of the window surround whereby ventilation air can pass directly through the frame part between an inlet and an outlet on opposite faces of the frame part, a laterally projecting portion from the frame part constituting a sealed abutment for a movable glazing unit. The air outlet includes an air flow control. EP-A-0115824 shows a generally similar ventilation system for glazed windows or doors. In this case however the outlet for the air from the system ventilation duct faces downwardly. Additionally in contrast to DE-A-1934996, the ventilation duct of this system forms a portion of the actual movable sash or glazing unit of the window as distinct from the window surround, the duct being secured to a frame part of the sash and including means to support a glazing assembly.
- It is an object of the present invention to provide a ventilation device for fitting at a doorway so as to be relatively unobtrusive, but which is convenient to fit and which gives satisfactory ventilation performance.
- According to the present invention there is provided a ventilation device as set out in the appended
claim 1. - Preferably the elongate member is adapted to serve as a top edge member of a doorway.
- Embodiments of the present invention will now be described by way of example with reference to the accompanying drawings wherein;
- Fig 1 shows a front view of a door in a domestic dwelling including a ventilator device in accordance with the present invention;
- Fig 2 shows a cross-section side view of the ventilator device of Fig 1 to a larger scale and through the section C-C in Fig 1.
- Fig. 3 shows a pictorial view of the ventilator of Fig 2
- Fig. 4 shows a plan of a domestic dwelling provided with ventilation device in accordance with the present invention and also with ventilation devices located at the windows;
- Fig. 5 shows a cross-sectional elevational end view of a ventilation device in accordance with the present invention fitted at a door aperture and in accordance with a second embodiement;
- Fig. 6 shows a sectional end view of a third embodiment;
- Fig. 7 ia an exploded pictorial view of the Fig. 5 embodiment, and
- Fig. 8 ia a sectional end view of a fourth embodiment.
- Referring to Figs. 1 to 3, a
vent 9A is fitted at the top of adoor 35. The door aperture is provided, in conventional manner, with upright wooden standards 36 and a toptransverse standard 37 bounding thewall blockwork 38 surrounding the door aperture. Theblockwork 38 hasplaster surface linings 39, and thenormal door facings 40 andbottom skirtings 41 are present. Each of thestandards vent 9A comprises abox condiut structure 42 which can be made by an extrusion process. Thestructure 42 includes anair inlet 24, theoutlet 22A being provided with an airflow control comprising a fixedapertured plate 22 and aslidable apertures plate 21 for "hit-and-miss" control with theplate 22. Thevent conduit structure 42 is secured to thetop standard 37, which can be rebated as shown to accept the conduit. - Alternatively, if the standard 37 is of rectangular cross-section, suitable packing can be provided at
zone 37A. The vertical leg of the L-shapingconduit 42 presents awall surface 43 serving as a door stop, and the conduit's vertical leg will have an appropriate length to meet the particular application eg. for fire door use. - An additional
door stop strip 37B is secured to standard 37. The ends of theconduit structure 42 are closed byappropriate end caps 15. - For use with fire doors, the
conduit structure 42 can include a channel to house afire safety element 44 comprising for example an intumescent fire strip. Theconduit structure 42 could house baffle means such as for example of cartridge form. Futher, a clip-on cover ornose drip 45 can be located at theinlet 24, especially where thedoor 35 is an external door (opening outwardly in this case). - The
above vent 9A provides a very simple efficient and effective means of secondary ventilation through buildings involving the passage of air over the head of the door rather than via vents fitted into apertures in the door, or through an opening in the partition or wall enclosure. - The
conduit structure 42 can comprise a simple extruded box section (with various possible adaptations for fly screens, thermal or sound baffle cartridges as per the window vent type etc.) which replaces the top door stop on the door standard or door set. Individual vents would be cut (to the full internal size of door set)from a long length of extruded section and, along with end caps etc., the full assembly would then be screwed up onto the top standard thus providing the door stop as well as the ventilator. - The conduit can either be fixed into a pre-rebating standard or planted straight onto the standard as illustrated. The door stops can either be "part only" to line through with width of projectiong section of vent unit or packed out and taken full width of door standard without any complications.
- The section could be formed in a number of different materials and could have a number of control systems.
- The above vent device for doors has the following advantages:-
- 1. The system is very simple, unobtrusive and aesthetically pleasing thus providing a very acceptable means of secondary 'through' ventilation in buildings.
- 2. The system doubles up as a door stop - and this is required in any event.
- 3. The system allows for easy control of ventilation if required.
- 4. The system can be either installed "on site" or in the factory in pre-fabricated door standards or sets.
- 5. The system can be manufactured simply (only one main section type) in a number of materials depending upon specification of finish required. Individual vents would be cut from long lengths as required.
- 6. Sound or thermal baffle cartridges can be easily incorporated if required similar to window vent system as shown in UK Pat. Appln. Nos. 8712477 and 8715570.
- 7. Because of the form of the vent system it is possible to incorporate a means of "fire stop" (unlike most other systems) although fire stopped vents would require to be made in steel. or other non-combustable material
- The system provides the following range of options:
- 1. Door VENT system only (permanent and non controllable);
- 2. Door VENT system only (controllable - manual or automatic);
- 3. Window VENT system only (permanent and non controllable);
- 4. Window VENT system only ( controllable - manual or automatic);
- 5. Full VENT (door and window) system (permanent and non-controllable);
- 6. Full VENT (door and window) system (controlable - manual or automatic).
- A. Each of the above systems can be fitted with sound baffle cartridges or fly screens if required providing further permutations.
- B. For controllable vents, automatic control can be provided by a number of methods:-
- (1) On an individual room (or ventilator) basis by means of a humidity sensor and/or mechanism (electrical, mechanical or organic) located within each VENT unit. This system would provide a very efficient particular control only in rooms requiring ventilation.
- (2) On a general basis by means of a centrally located humidity sensor and with links to each VENT control thus providing uniform conditions in each room.
- (3) On very high specification installations a small computer could be incorporated to provide even more finely tuned control.
- By means of only the two basic VENT systems (door and window openings) and the possibility of sound or thermal baffle 'cartridges' complete control of the enviroment is very easily maintained. The simplicity, efficiency and flexibility of the present Enviroment System provides for the possibility of highly tuned natural secondary ventilation from zero air changes up to many times the minimum Building Regulation standards.
- Specifically Fig. 4 shows a typical five apartment house layout demonstrating may of the Enviroment Systems.
- The essence of the above Enviroment Systems is one of considering the control and efficiency of secondary ventilation of buildings as a science in its own right rather than the traditional idea of ventilators being considered like accessories for windows and doors.
- The control units for the various window and door vents WV, DV are shown schematically as item C (CO being such units in the open condition). The cross hatching shows home areas, specifically the lounge and hall, in a ventilated mode by means of the open control units CO.
- The embodiment shown in Fig. 5 is applied in a door like the embodiment of Figs. 1 to 3 and like parts carry like reference numerals. However in this case the door head frame member is formed as a cellular form plastics extrusion 56. Integral with the extrusion 56 is a
door vent 57 generally similar to thevent 9A of Fig. 1. As previously, a sound proof baffle could be installed in thevents 52 or 57. - As an alternative to the plastics extrusion consturction it would be possible to have the vent structure formed integral with a metal form frame member at an aperture. For example this metal form frame member could take the form of an aluminium extrusion.
- Figs. 6 and 7 show a
vent 9A in accordance with another embodiment of the present invention fitted at the top of doorway 35 - exactly of the construction shown in Fig. 1, and thevent 9A is basically similar to thevents 9A ofthe previous embodiments. - The
conduit 42 is secured byscrews 16 to the top standard 37, which can be rebated as shown to accept the conduit. - Alternatively, if the standard 27 is of rectangular cross-section, suitable packing can be provided at
zone 37A. Again the vertical leg of the L-shapedconduit 42 presents awall surface 43 service as a door stop, and the conduit's vertical leg will have an appropriate length to meet the particular application eg. for fire door use. An additionaldoor stop strip 37B is secured to standard 37. Ahorizontal air discharge 22A is present as in the previous embodiment, and again acontrol strip 21 is provided for air flow control. The ends of theconduit 42 can be closed by appropriate end caps 15 as previously and generally like parts carry like reference numerals. - The
sides conduit structure 42 at the air inlet and the air outlet respectively carry a series ofapertures conduit 42. Each end cap 15 (see Fig. 7) comprises a recessedbase part 60 carrying a set of lugs ortongues conduit structure 42. Further, thebase part 60 presents a laterally directedtab plate 64 on which an end of the airflow control plate 21 is slidable, thetab plate 64 serving to close off a respective end portion of theair flow control 21/22 so that effective air flow control is always possible from zero to maximum rates. - Cord controls can be fitted or control can be by means of recessed mechanism within vertical door frames of vertical door stops.
- Thus as shown in Fig. 2, an
operating cord 68 is connected to a laterally extendingfinger grip 23 of theplate 21, and extends to the sides of thevent 9A where it passes through a hole 67 in adownstand bracket 66 on thetab plate 64 and then downwardly to the operating position, so enabling convenient remote control of thevent 9A located at the top door standard. - To facilitate matching requirements and
interchangable nose part 42A is provided insertable into a recess in themain conduit 42 and can have various shapes, sizes, colours etc. Astrip 16B is fitted into a recess of theconduit 42 to cover the screwheads of screws fitted throughapertures 16A. - The
conduit 42 can comprise a simple extruded box section (with various possible adaptations for fly screens, thermal or sound baffle cartridges as per the window vent type etc.) which replaces the top door stops on the door standard or door set. Individual vents would be cut (to the full internal size of door set) from a long length of extruded section and, along with end caps etc. the full assembly would then be screwed up onto the top standard thus providing the door stop as well as the ventilator. - The conduit can either be fixed into a prerebated standard or planted straight onto the standard as illustrated. The door stops can either be "part only" to line through with width or projecting section of vent unit or packed out and taken full width of door standard without any complications.
- In the embodiment of Fig. 8 a
vent 9A is again provided for the top of a doorway but in compariosn with the vent of Figs. 12-14, the vent of Fig. 15 is designed to include structure replacing the top transverse door standard 37, and for this requirement theconduit 42 includes aback portion 42B. In this example theconduit 42 is screwed directly into thetop blockwork 38, and theconduit portion 42B can include anaccess plate 16B for access to fixing screws 16.
Claims (12)
- A ventilation device for use at a door, comprising an elongate member (42) adapted to serve as part of a side frame structure (37) of a doorway, said elongate member (42) comprising a box structure which is L-shaped in transverse cross-section, the box-structure (42) being adapted such that the shorter leg projects laterally so as to overhang a door (35) and serve as a stop for the door (35), an air conduit being defined between spaced walls of the box structure (42) for through passage of ventilating air, said elongate structure (42) including an inlet port (24) to said conduit and a discharge port (22A) from the conduit, an air-flow control device (21, 22) in one of the ports for controlling air flow through the port, and end caps (15) closing the ends of the box structure (42) characterised in that one of said ports (22A) is located in the shorter leg of the box structure (42) such that said one port (22A) faces downwardly, and in that a lateral reinforcing structure (22) joins the spaced wall portions of the box structure (42) in said shorter leg, said reinforcing structure (22) defining openings for passage of air via said one port (22A) in the shorter leg, and in that the end caps (15) include plate portions (64) which extend laterally from the caps to overlie said air-flow control device (21, 22).
- A ventilation device as claimed in claim 1, characterised in that the reinforcing structure (22) comprises an apertured wall.
- A ventilation device as claimed in claim 1 or 2 characterised in that said one port (22A) comprises the discharge port.
- A ventilation device as claimed in any one of the preceding claims characterised in that the elongate member (42) is adapted to serve as a top edge member of a doorway.
- A ventilation device as claimed in claim 4, characterised in that the elongate member (42) is adapted to be secured to a top door transverse standard member (37) of a doorframe.
- A ventilation device as claimed in claim 4, characterised in that the elongate member (42 Fig 5) comprises a top door transverse standard member of a doorframe.
- A ventilation device as claimed in claim 1, characterised in that the elongate member (42) is in the form of a vent assembly including a main duct body (42), and a nose portion (42A), said nose portion (42A) being in the form of a separate interchangeable unit, joining means being provided for removably connecting said nose portion (42A) to the main duct body (42).
- A ventilation device as claimed in any one of the preceding claims, characterised in that an air flow control (21/22) is provided at the air discharge port (22A).
- A ventilation device as claimed in claim 8, characterised in that the airflow control comprises a first plate (22) of aperture form and a relatively moveable second plate (21) controlling airflow through the first plate (22).
- A ventilation device as claimed in claim 9, characterized in that actuating means (68) are fitted to a control element (23) for remote operation of the second plate (21).
- A ventilation device as claimed in claim 10, characterised in that the end caps (15) include support means (66, 67) to support said actuating means (68) which for example can be in the form of a cord.
- A ventilation device as claimed in any one of the preceding claims, characterized in that the elongate member (42) is made of plastics material and is formed by an extrusion process.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8624588 | 1986-10-14 | ||
GB868624588A GB8624588D0 (en) | 1986-10-14 | 1986-10-14 | Ventilation apparatus & system |
GB8715570 | 1987-07-02 | ||
GB878715570A GB8715570D0 (en) | 1987-07-02 | 1987-07-02 | Vent for windows |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0285644A1 EP0285644A1 (en) | 1988-10-12 |
EP0285644B1 true EP0285644B1 (en) | 1993-03-31 |
Family
ID=26291419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870906828 Expired - Lifetime EP0285644B1 (en) | 1986-10-14 | 1987-10-14 | Ventilation device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0285644B1 (en) |
DE (1) | DE3785188T2 (en) |
WO (1) | WO1988002805A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8906224D0 (en) * | 1989-03-17 | 1989-05-04 | Hamilton John G | Fastening device for ventilation ducts |
NL1010535C2 (en) * | 1998-11-12 | 1999-11-24 | Lans Holding B V J | Window frame member comprising two extruded profiles, contains a ventilation passage between the profiles with the entrance and exit along its length sides |
DE102008012664A1 (en) | 2008-01-30 | 2009-08-06 | Repower Systems Ag | Wind turbine and a tower or tower segment and a door frame for it |
DE102008019271A1 (en) | 2008-04-16 | 2009-10-22 | Kenersys Gmbh | Wind turbine with improved cooling air flow |
EP2295880A1 (en) * | 2009-08-20 | 2011-03-16 | Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO | Method and system for ventilating a building |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1934996A1 (en) * | 1969-07-10 | 1971-01-28 | Dynamit Nobel Ag | Continuous fan for windows, doors, facades or the like. |
GB2135045B (en) * | 1983-02-10 | 1986-08-06 | Hardware & Systems Patents Ltd | Ventilator for glazed windows or doors |
EP0132779A3 (en) * | 1983-07-23 | 1985-10-23 | Hans Schlitzberger | Window case |
DE3422151A1 (en) * | 1984-06-14 | 1986-01-02 | Gebrüder Kömmerling Kunststoffwerke GmbH, 6780 Pirmasens | SOUND PROTECTION WINDOW |
DE3443501A1 (en) * | 1984-11-29 | 1986-06-05 | AluTeam Bautechnik GmbH, 5440 Mayen | Frame profile for a window |
-
1987
- 1987-10-14 EP EP19870906828 patent/EP0285644B1/en not_active Expired - Lifetime
- 1987-10-14 WO PCT/GB1987/000723 patent/WO1988002805A1/en active IP Right Grant
- 1987-10-14 DE DE19873785188 patent/DE3785188T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0285644A1 (en) | 1988-10-12 |
WO1988002805A1 (en) | 1988-04-21 |
DE3785188T2 (en) | 1994-01-05 |
DE3785188D1 (en) | 1993-05-06 |
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