GB2246848A - Gas boiler with releasable airbox and flue assembly and combustion box - Google Patents
Gas boiler with releasable airbox and flue assembly and combustion box Download PDFInfo
- Publication number
- GB2246848A GB2246848A GB9014796A GB9014796A GB2246848A GB 2246848 A GB2246848 A GB 2246848A GB 9014796 A GB9014796 A GB 9014796A GB 9014796 A GB9014796 A GB 9014796A GB 2246848 A GB2246848 A GB 2246848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- airbox
- gas
- combustion box
- flue assembly
- assembly
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/14—Arrangements for connecting different sections, e.g. in water heaters
Abstract
A gas boiler has separate but releasably inter-connectible airbox and flue assembly 10 and combustion box 11. The airbox and flue assembly 10 has water flow feed and return paths 23 normally closed by valves 28 (Fig. 2) until the combustion box 11 is coupled to the airbox and flue assembly 10, the combustion box automatically opening the valves 28 upon such coupling. The valves are spring biassed to automatically close upon uncoupling of the combustion box from the airbox and flue assembly. The airbox and flue assembly has gas and electricity supply connections 34, 35 adapted for releasable coupling to complementary connections on the combustion box. The airbox and flue assembly thus acts as a service board for the water, gas and electricity services of the gas boiler which has a fail safe open water flow configuration. <IMAGE>
Description
GAS BOILERS
This invention relates to gas-fired water boilers especially but not exclusively wall-mounted gas-fired water boilers (hereinafter for simplicity called "gas boilers").
The invention is especially but again not exclusively concerned with domestic gas boilers.
It is an object of the present invention to provide a gas boiler which is simpler to instal, service and maintain than existing gas boilers.
According to an aspect of the present invention there is provided, for a gas boiler, an airbox and flue assembly to which a combustion box can be releasably coupled, the airbox and flue assembly incorporating water flow feed and return paths normally closed by valves adapted to be opened automatically upon coupling of the combustion box to the airbox and flue assembly.
Preferably an obturating member normally closes each water flow path and is adapted to be acted upon and moved to a water flow path open position or condition by an actuating member on the combustion box.
Preferably each obturating member is loaded, urged or otherwise caused to take up a water flow path closed position or condition. For example, each obturating member may be maintained in its water flow path closed position or condition by spring force or hydraulic, pneumatic, mechanical (push rod for example), electrical or magnetic force or by gravity.
Each obturating member is preferably, however, a spring-loaded valve element.
Each obturating member is, as aforesaid, moved to a water flow path open position or condition and is preferably maintained in such position or condition while the airbox and flue assembly and the combustion box are in coupled relationship. The water flow paths are thus fail-safe open when the gas boiler is assembled.
The airbox and flue assembly thus acts as a service board for the gas boiler water services.
Preferably, it also acts as a service board for the gas boiler gas and electricity services.
Preferably, the airbox and flue assembly comprises a normally closed gas flow path.
Preferably, the gas flow path comprises a gas line extending from the airbox and flue assembly in the form of a pipe, preferably flexible, terminating at a manual gas cock connector adapted for releasable connection to a gas burner assembly incorporated in, or connectible to, the combustion box.
Preferably, the gas boiler electricity supply is connectible to the airbox and flue assembly and terminates on the latter in a plug/socket type connection adapted for releasable connection with a complementary socket/plug connection in a gas burner assembly control arrangement.
According to another aspect of the present invention there is provided, for a gas boiler, a combustion box adapted for releasable coupling to an airbox and flue assembly as defined in the preceding ten paragraphs and including a heat exchanger or water boiler with a water flow inlet and outlet, each incorporating, or having associated therewith, an actuating member adapted, upon coupling of the combustion box to the airbox and flue assembly, to place the inlet and outlet in water flow communication with the water flow feed and return paths in the latter.
Preferably, the combustion box incorporates, or has connected thereto, a gas burner assembly and control arrangement adapted for releasable connection with gas and electricity service outlets on the airbox and flue assembly.
Preferably the gas service connection on the combustion box is a gas pipe connector.
Preferably the electricity service connection on the combustion box is a plug/socket type connector.
According to a further aspect of the present invention there is provided a gas boiler comprising an airbox and flue assembly and a combustion box both as defined in the preceding fourteen paragraphs releasably coupled together with complementary interengaging releasable water, gas and electricity service connections.
Preferably, the combustion box is supported on a ledge along the airbox and flue assembly at or adjacent the bottom of the latter and is releasably secured to the latter by complementary interengaging latching elements or formations on the combustion box and the airbox and flue assembly.
Preferably the gas boiler is releasably fitted with an outer casing giving access to the gas burner assembly control arrangement.
According to still another aspect of the present invention there is provided a gas boiler whereof the gas burner assembly control arrangement is arranged remotely from the gas boiler.
The control arrangement may be wired to the gas burner assembly or the gas burner assembly and control arrangement can be operatively interconnected in a non-wired manner, for example infrared control.
The control arrangement may, inter alia, include an on/off/adjustment gas supply control with ignition, a timer, a thermostatic control (electronic or otherwise) and/or any other desired or required operational control.
The gas boiler may be of any suitable construction including that disclosed and defined herein.
As a result of this aspect of the present invention the control arrangement can be disposed at the most convenient location for a user, for example a suitable control box could be fitted on or in a kitchen worktop.
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is an exploded perspective view of an airbox and flue assembly and a combustion box of a gas boiler according to the present invention;
Fig. 2 is a fragmentary, part-sectional view of a water flow path connection of the gas boiler;
Fig. 3 is a fragmentary perspective view of a gas boiler according to the present invention having alternative water flow path connections;
Figs. 4 and 5 are detail views showing respectively a disconnected and a connected water flow path of the gas boiler of Fig.
3; and
Fig. 6 shows detail views of the gas boiler showing the releasable coupling between the combustion box and the airbox and flue assembly.
For the purposes of the following description it is to be noted that the gas boiler is a domestic wall-mounted gas boiler employed for central heating purposes.
For the avoidance of doubt it is to be further noted that a gas boiler according to the present invention can be employed to supply domestic hot water and/or central heating hot water.
Referring now to Figs. 1, 2 and 6 of the drawings, the gas boiler comprises two main components, namely an airbox and flue assembly 10 and a combustion box 11.
The airbox and flue assembly 10 comprises a backplate 12 having a bottom outstanding ledge 13 and mounts on its front face an air box 14 having in spaced apart relationship a top flue opening 15 and a bottom air inlet 16.
Extending from the back face of the backplate 12 in communication with the flue opening 15 is a flue 17 of any convenient construction adapted to extend outwardly through a preformed hole 18 in an outer wall 19 of, for example, a house.
The backplate 12 is screwed or bolted to the inside of the outer wall 19.
The airbox 14 centrally of its top and at its front is provided with a pivotal latch 20. More than one pivotal latch may be provided if desired or required.
The airbox and flue assembly 10 constitutes a service board for the gas boiler in that it is provided with water flow path, gas and electricity terminations to which the combustion box 11 can be releasably connected when the latter is coupled to the airbox and flue assembly as hereinafter described.
Water inlet and outlet pipes 21 and 22 respectively are connected into water flow paths 23 in the upper end of the airbox 14.
Each water flow path 23 is substantially of L-configuration (see
Fig. 2) with a top opening 24 and a front opening 25. The flow path 23 adjacent and inwardly of the front opening 25 is surrounded by two sealing O-rings 26 and 27.
A valve element 28 is urged into sealing contact with the inner
O-ring by a spring 29 whereof one end is secured to the valve element 28 while the other end is suitably secured as indicated at 30 to a fixed wall 31 of the airbox 14 partly defining the flow path 23.
On the backplate 12 below the airbox 14 are the gas supply and electricity supply terminations.
The gas supply is fed from the mains by a pipe 32 to which is connected a flexible pipe 33 terminating in a manual gas cock connector 34.
The electricity supply is also fed from the mains by a cable 35 to a socket 36.
The combustion box 11 comprises and houses a heat exchanger or boiler (not shown) and a gas burner assembly and control arrangement generally indicated at 37.
The combustion box 11 has a flue spigot 38 and an air inlet spigot 39 adapted respectively to engage in flue opening 15 and air inlet 16.
The gas burner assembly and control arrangement 37 has a gas connector (not shown) and an electric lead and plug 40.
The heat exchanger or boiler of the combustion box 11 has two water flow pipes 41 which extend from the back of the combustion box 11.
Each pipe 41 inwardly of its end 42, which may be of open or closed configuration, is tapered and has peripherally-spaced openings 43.
Each pipe 41 is adapted to engage in a respective water flow path 23 and to be sealingly engaged by the outer sealing O-ring 27.
The combustion box 11 centrally at its top has a latch formation 44 adapted to be releasably engaged and retained by the pivotal latch 20. More than one latch formation may be provided if desired or required.
With the airbox and flue assembly 10 secured to the wall 19, the combustion box 11 is offered up to the backplate 12 and its bottom rear edge 45 is located on the ledge 13 and the pivotal latch 20 is operated to engage the latch formation 44. Retaining screws and wing nuts 46 are then fitted to secure the combustion box 11 to the backplate 12.
When the combustion box 11 is being so fitted and secured to the airbox and flue assembly 10 the pipes 41 extend into the water flow paths 23 and push the valve elements 28 away from the inner sealing O-rings 26 which form, in effect, valve seats. Due to the tapered and peripherally-apertured configuration of the pipes 41 water flow communication is provided between the water flow paths 23 and the heat exchanger or boiler interior and this is maintained for as long as the coupling between the airbox and flue assembly 10 and the combustion box 11 exists. There is thus established fail safe open water communication to the heat exchanger or boiler.
To complete the gas boiler, the connector 34 is coupled to the gas connector on the gas burner assembly and control arrangement and the cock manually opened, and the electric plug 40 connected to the control arrangement is coupled to the socket 36.
In the alternative gas boiler shown in Figs. 3 to 5 parts identical to those of Figs. 1 and 2 are designated by the same references with the suffix "A".
In this embodiment, the water supply and return pipes 21A and 22A each terminate in a flexible pipe 50 having a terminal socket 51 defining a right-angled flow path 52. The flow path 52 is open at one end as indicated at 53 for communication with the heat exchanger or boiler (not shown) of the combustion box 1lA, and adjacent the open end and inwardly thereof is a sealing O-ring 54 surrounding the water flow path 52.
The water flow path 52 within the terminal socket 51 is normally closed by a valve element 55 urged by a spring 56 against an edge 57 of the bore defining the water flow path 52. The spring 56 at one end engages the valve element 55 and at its other end a locating projection 58 on an end wall 59 of the socket 51. The wall of the socket 51 adjacent the open end 53 is provided with a locking grub screw 60.
The heat exchanger or boiler, in this embodiment has two vertical water flow pipes 61 extending out of the top of the combustion box 11A.
Each pipe 61 is peripherally grooved as indicated at 62 adjacent the top of the combustion box llA.
Each pipe 61 is open at its top and has extending upwardly therefrom a stem 63 suitably mounted on and/or in the pipe 61 so as not to close the latter with, at the upper end of the stem 63, a pusher plate 64.
When, therefore, a socket 51 is pushed onto its respective pipe 61 the valve element 55 contacts the pusher plate 64 and as a consequence is moved off its seat 57 compressing the spring 56 and providing full water flow communication between the pipes 21A, 22A, flexible pipe 50 and heat exchanger or boiler pipes 61.
Each pipe 61 sealing engages with the surrounding O-ring 54 and the socket 51 and pipe 61 are releasably locked together by engaging the grub screw 60 into the peripheral groove 62.
A gas boiler according to this invention can easily and readily be installed by one operator, the three services can be pre-tested before fitment of the combustion box (and, of course, the boiler casing) and the combustion box can be removed for service or maintenance or even replacement without needing to drain the water system or central heating system.
It is a United Kingdom Standard requirement that the use of a valve in a flow pipe between a boiler and an open vent pipe connection in an open vented wet system is prohibited.
It is considered that this Standard is not breached by a gas boiler according to the present invention due to the fail safe open water flow communication achieved as a result of which the valves cease to function as valves.
Claims (23)
1. An airbox and flue assembly for a gas boiler and adapted for releasable coupling thereto of a combustion box can be releasably coupled, the airbox and flue assembly incorporating water flow feed and return paths normally closed by valves adapted to be opened automatically upon coupling of the combustion box to the airbox and flue assembly.
2. An airbox and flue assembly as claimed in claim 1, in which an obturating member normally closes each water flow path and is adapted to be acted upon and moved to a water flow path open position or condition by an actuating member on the combustion box.
3. An airbox and flue assembly as claimed in claim 2, in which each obturating member is loaded, urged or otherwise caused to take up a water flow path closed position or condition.
4. An airbox and flue assembly as claimed in claim 3, in which each obturating member is maintained in its water flow path closed position or condition by spring force or hydraulic, pneumatic, mechanical (push rod for example), electrical or magnetic force or by gravity.
5. An airbox and flue assembly as claimed in claim 3 or 4, in which each obturating member is a spring-loaded valve element.
6. An airbox and flue assembly as claimed in any one of claims 1 to 5, comprising a normally closed gas flow path.
7. An airbox and flue assembly as claimed in claim 6, in which the gas flow path comprises a gas line extending from the airbox and flue assembly in the form of a pipe terminating at a manual gas cock connector adapted for releasable connection to a gas burner assembly incorporated in, or connectible to, the combustion box.
8. An airbox and flue assembly as claimed in claim 7, in which the pipe is flexible in nature.
9. An airbox and flue assembly as claimed in any one of claims 1 to 8 comprising a plug or socket type connection of an electricity supply and to which a gas burner control arrangement of a combustion box is connectible by a socket or plug type connection.
10. An airbox and flue assembly for a gas boiler, substantially as hereinbefore described with reference to the accompanying drawings.
11. A combustion box for a gas boiler adapted for releasable coupling to an airbox and flue assembly as claimed in any one of claims 1 to 10 and including a heat exchanger or water boiler with a water flow inlet and outlet, each incorporating, or having associated therewith, an actuating member adapted, upon coupling of the combustion box to the airbox and flue assembly, to place the inlet and outlet in water flow communication with the water flow feed and return paths in the latter.
12. A combustion box as claimed in claim 11, when dependent on claim 9, incorporating or having connected thereto, a gas burner assembly and control arrangement adapted for releasable connection with gas and electricity service outlets on the airbox and flue assembly.
13. A combustion box as claimed in claim 12, in which the gas service connection on the combustion box is a gas pipe connector.
14. A combustion box as claimed in claim 12 or 13, in which the electricity service connection on the combustion box is a plug/socket type connector.
15. A combustion box for a gas boiler, substantially as hereinbefore described with reference to the accompanying drawings.
16. A gas boiler comprising an airbox and flue assembly as claimed in any one of claims 1 to 10 and a combustion box both claimed in any one of claims 11 to 15 releasably coupled together with complementary interengaging releasable water, gas and electricity service connections.
17. A gas boiler as claimed in claim 16, in which the combustion box is supported on a ledge along the airbox and flue assembly at or adjacent the bottom of the latter and is releasably secured to the latter by complementary interengaging latching elements or formations on the combustion box and the airbox and flue assembly.
18. A gas boiler as claimed in claim 16 or 17 releasably fitted with an outer casing giving access to the gas burner assembly control arrangement.
19. A gas boiler whereof the gas burner assembly control arrangement is arranged remotely from the gas boiler.
20. A gas boiler as claimed in claim 19, in which the control arrangement is wired to the gas burner assembly, or the gas burner assembly and control arrangement are operatively interconnected in a non-wired manner, for example infra-red control.
21. A gas boiler as claimed in claim 19 or 20, in which the control arrangement is, inter alia, include an on/off adjustment gas supply control with ignition, a timer, a thermostatic control (electronic or otherwise) and/or any other desired or required operational control.
22. A gas boiler as claimed in any one of claims 19 to 21 constructed as claimed in claim 16.
23. A gas boiler, substantially, as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9014796A GB2246848B (en) | 1990-07-04 | 1990-07-04 | Gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9014796A GB2246848B (en) | 1990-07-04 | 1990-07-04 | Gas boiler |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9014796D0 GB9014796D0 (en) | 1990-08-22 |
| GB2246848A true GB2246848A (en) | 1992-02-12 |
| GB2246848B GB2246848B (en) | 1994-05-18 |
Family
ID=10678633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9014796A Expired - Fee Related GB2246848B (en) | 1990-07-04 | 1990-07-04 | Gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2246848B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670459A1 (en) * | 1994-03-05 | 1995-09-06 | Robert Bosch Gmbh | Heater for space heating and domestic hot water production |
| EP0784192A1 (en) * | 1996-01-15 | 1997-07-16 | N.V. Radson-Alutherm | Heating appliance |
| GB2323914A (en) * | 1997-02-10 | 1998-10-07 | Heating World Group Limited | Installation of wall-mounted boilers |
| EP0870997A3 (en) * | 1997-04-10 | 2000-05-10 | Robert Bosch Gmbh | Connecting arrangement for a wall mounted heater |
| EP1275910A2 (en) * | 2001-07-12 | 2003-01-15 | Luke Chamberlain | Boiler unit |
| GB2409894A (en) * | 2001-07-12 | 2005-07-13 | Luke Chamberlain | Boiler unit with removable support rails |
| WO2008022888A1 (en) * | 2006-08-23 | 2008-02-28 | BSH Bosch und Siemens Hausgeräte GmbH | Continuous heater for fast assembly |
| NL2003542C2 (en) * | 2009-09-25 | 2011-03-28 | Agpo Bv | HEATING COMPOSITION. |
| EP2484990A3 (en) * | 2010-10-07 | 2016-08-10 | Boilers Limited Lukey | A boiler assembly comprising a removable boiler unit |
| BE1023820B1 (en) * | 2015-12-29 | 2017-08-02 | Axel PAUWELS | Boiler installation device facilitating the replacement or repair thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1169573A (en) * | 1965-12-15 | 1969-11-05 | Walter Ruegg | An Improved Fluid Heating Appliance |
| GB1346431A (en) * | 1972-02-21 | 1974-02-13 | Wilson & Co Ltd Henry | Boiler |
| GB2107441A (en) * | 1981-08-03 | 1983-04-27 | Auer Soc Ind | Gas or liquid-fired hot water boiler |
| GB2158209A (en) * | 1984-05-02 | 1985-11-06 | Jonathan Leslie Greenall | Detachable back boiler |
| US4917077A (en) * | 1986-11-17 | 1990-04-17 | Giorgio Scanferla | Wall-mounted hot water boiler of the instant type |
-
1990
- 1990-07-04 GB GB9014796A patent/GB2246848B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1169573A (en) * | 1965-12-15 | 1969-11-05 | Walter Ruegg | An Improved Fluid Heating Appliance |
| GB1346431A (en) * | 1972-02-21 | 1974-02-13 | Wilson & Co Ltd Henry | Boiler |
| GB2107441A (en) * | 1981-08-03 | 1983-04-27 | Auer Soc Ind | Gas or liquid-fired hot water boiler |
| GB2158209A (en) * | 1984-05-02 | 1985-11-06 | Jonathan Leslie Greenall | Detachable back boiler |
| US4917077A (en) * | 1986-11-17 | 1990-04-17 | Giorgio Scanferla | Wall-mounted hot water boiler of the instant type |
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670459A1 (en) * | 1994-03-05 | 1995-09-06 | Robert Bosch Gmbh | Heater for space heating and domestic hot water production |
| EP0784192A1 (en) * | 1996-01-15 | 1997-07-16 | N.V. Radson-Alutherm | Heating appliance |
| NL1002098C2 (en) * | 1996-01-15 | 1997-07-16 | Radson Alutherm Nv | Heater. |
| GB2323914A (en) * | 1997-02-10 | 1998-10-07 | Heating World Group Limited | Installation of wall-mounted boilers |
| GB2323914B (en) * | 1997-02-10 | 2000-10-18 | Heating World Group Limited | Domestic heating boilers |
| EP0870997A3 (en) * | 1997-04-10 | 2000-05-10 | Robert Bosch Gmbh | Connecting arrangement for a wall mounted heater |
| GB2410317A (en) * | 2001-07-12 | 2005-07-27 | Luke Chamberlain | Lockable boiler unit |
| GB2409895B (en) * | 2001-07-12 | 2005-11-09 | Luke Chamberlain | Boiler unit with isolation valves on boiler and manifold |
| EP1275910A3 (en) * | 2001-07-12 | 2003-10-22 | Luke Chamberlain | Boiler unit |
| GB2409894A (en) * | 2001-07-12 | 2005-07-13 | Luke Chamberlain | Boiler unit with removable support rails |
| GB2409895A (en) * | 2001-07-12 | 2005-07-13 | Luke Chamberlain | Boiler unit with isolation valves on boiler and manifold |
| GB2409893A (en) * | 2001-07-12 | 2005-07-13 | Luke Chamberlain | Boiler unit with front mounted isolation valves |
| GB2410076A (en) * | 2001-07-12 | 2005-07-20 | Luke Chamberlain | Boiler unit with sensing means |
| GB2410075A (en) * | 2001-07-12 | 2005-07-20 | Luke Chamberlain | Boiler unit with remote management system |
| EP1275910A2 (en) * | 2001-07-12 | 2003-01-15 | Luke Chamberlain | Boiler unit |
| GB2378747B (en) * | 2001-07-12 | 2005-08-24 | Luke Chamberlain | Boiler unit |
| GB2412157A (en) * | 2001-07-12 | 2005-09-21 | Luke Chamberlain | Boiler unit with quick release flue connection |
| GB2378747A (en) * | 2001-07-12 | 2003-02-19 | Luke Chamberlain | Detachable boiler unit |
| GB2409893B (en) * | 2001-07-12 | 2005-11-09 | Luke Chamberlain | Boiler unit with front mounted isolation valves |
| GB2410075B (en) * | 2001-07-12 | 2005-11-16 | Luke Chamberlain | Boiler unit with remote management system |
| GB2409894B (en) * | 2001-07-12 | 2005-11-16 | Luke Chamberlain | Boiler unit with removable support rails |
| GB2410076B (en) * | 2001-07-12 | 2005-11-23 | Luke Chamberlain | Boiler unit with sensing means |
| GB2410317B (en) * | 2001-07-12 | 2005-11-23 | Luke Chamberlain | Lockable boiler unit |
| GB2412157B (en) * | 2001-07-12 | 2006-01-18 | Luke Chamberlain | Boiler unit with quick release flue connection |
| EP2366962A1 (en) * | 2001-07-12 | 2011-09-21 | Luke Chamberlain | Boiler unit |
| WO2008022888A1 (en) * | 2006-08-23 | 2008-02-28 | BSH Bosch und Siemens Hausgeräte GmbH | Continuous heater for fast assembly |
| NL2003542C2 (en) * | 2009-09-25 | 2011-03-28 | Agpo Bv | HEATING COMPOSITION. |
| EP2484990A3 (en) * | 2010-10-07 | 2016-08-10 | Boilers Limited Lukey | A boiler assembly comprising a removable boiler unit |
| BE1023820B1 (en) * | 2015-12-29 | 2017-08-02 | Axel PAUWELS | Boiler installation device facilitating the replacement or repair thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9014796D0 (en) | 1990-08-22 |
| GB2246848B (en) | 1994-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020704 |