GB2418239A - Thermally activated safety coupling for oxygen supply - Google Patents
Thermally activated safety coupling for oxygen supply Download PDFInfo
- Publication number
- GB2418239A GB2418239A GB0519155A GB0519155A GB2418239A GB 2418239 A GB2418239 A GB 2418239A GB 0519155 A GB0519155 A GB 0519155A GB 0519155 A GB0519155 A GB 0519155A GB 2418239 A GB2418239 A GB 2418239A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermally activatable
- safety coupling
- activatable safety
- coupling
- outlet port
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/1026—Fire protection devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
- A61M16/101—Preparation of respiratory gases or vapours with O2 features or with parameter measurement using an oxygen concentrator
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/02—Gases
- A61M2202/0208—Oxygen
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/03—Gases in liquid phase, e.g. cryogenic liquids
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Public Health (AREA)
- Mechanical Engineering (AREA)
- Emergency Management (AREA)
- Business, Economics & Management (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Anesthesiology (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- Emergency Medicine (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
A coupling for connecting two lengths of hose includes a thermally activatable safety valve comprising a ball 18 which is biased in a direction to cut off the flow of gas, but held open by a slidable sleeve 24. The sleeve is maintained in the open position by a thermally activatable element 30, which may be made from a plastics material or solder, for example. The coupling has an inlet connection 12 and an outlet connection 14. The coupling is intended to connect hoses carrying domiciliary oxygen for therapeutic use. If the hose catches fire, the flame travelling down the inside of the hose actuates the safety valve to cut off the oxygen supply. The thermally activatable element 30 may be a discrete protrusion at the outlet end of the coupling, or may be formed integrally with the coupling (figure 2).
Description
24 1 8239
THERMALLY ACTIVATABLE SAFETY COUPLING
This invention relates to a thermally activatable safety coupling for use in protecting gaseous installations from fire and explosion risks. In particular, this invention relates to a thermally activatable safety coupling for use in supplying an oxygen source to a user or patient via a flexible hose.
to It is well established that oxygen therapy is particularly useful for treating a wide variety of long-term respiratory illnesses at home. Patients.
with asthma, emphysema, chronic bronchitis, occupational lung disease, lung,.
cancer, cystic fibrosis or congestive heart failure can benefit greatly from the i' use of domiciliary oxygen therapy. .. - . e At present, domiciliary oxygen is generally supplied to the patient from either high pressure cylinders supplied by pharmacies or delivered by way of an oxygen concentrator or liquid oxygen system installed in the patient's 'lo: home. A flexible hose is used to supply oxygen to the patient's face mask via a flow controller. Occasionally, hose fire incidents occur caused by patients who smoke whilst using the oxygen. When this happens, the fire starts at the patient end and burns the hose back to the oxygen source. The oxygen in the hose accelerates the fire and a serious fire incident can often quickly develop.
Flame arrestor elements and thermal shut-off devices are well known in oxygen and acetylene welding equipment. In welding applications, the flame is the result of the gas burning (flammable gas mixture in the supply line) and the flame front travels very rapidly backwards in the hose (referred to as a "flash back"). In a welding flame arrestor, the thermal shut-off valve assembly so is in the main body of the flame arrestor and the heat from the burning gas triggers the thermal shut-off. However, in a medical oxygen hose fire, it is not the gas burning, it is the inside of the hose which is burning therefore a welding flame arrestor type of safety device will not trigger quickly, if at all, with this type of hose fire.
It is the object of the present invention to provide a thermally activatable safety coupling of simple and economical construction that is quick and easy to install. In a fire condition, the present invention is capable of preventing a fire progressing along a flexible hose and rapidly shuts off the gaseous supply. Operation of the present invention in a fire condition serves to protect the gaseous source and stops oxygen feeding the fire, thus To reducing the fire risk to the user or patient and their residence.
According to the present invention there is provided a thermally., activatable safety coupling for use in connecting flexible conduits supplying.
gas, comprising: . an inlet port and an outlet port for coupling a gas supply source to a gas user appliance; . a normally-open valve assembly situated between said inlet port and. ' said outlet port, said valve assembly being displaceable between an open position permitting gaseous flow and a closed position blocking gaseous flow; resilient means for urging said valve assembly towards said closed position; and a thermally activatable element situated at the outlet port being adapted to release said valve assembly at a predetermined temperature and thereby causing the valve assembly to close.
In a preferred embodiment, said thermally activatable safety coupling is formed as a substantially elongate tube with said inlet port and said outlet port being located at each end thereto. In use, said inlet port and said outlet port may be provided with push-fit or ridged connectors for connection to said so flexible conduits supplying gas. Alternatively, said inlet port can be threaded for connection to said flexible conduits supplying gas. Preferably, said flexible conduits may be any suitable flexible hose for supplying gas.
Preferably, said gas is oxygen and said gas supply source may be bottles, cylinders or a fixed oxygen concentrator unit or liquid oxygen system.
Said gas user appliance may be a patient face mask or any application or treatment requiring oxygen to be supplied to a patient or user.
In use, a slideable sleeve is positioned between said valve assembly and said thermally activatable element. Said valve assembly is urged against said slideable sleeve towards said closed position via said resilient means, To which may be provided by a compressed spring or the like. If a fire condition occurs between said thermally activatable safety coupling and said gas user A. appliance, when the heat generated by the fire as it burns backwards towards -, the gas supply source is above said predetermined temperature, said thermally activatable element yields and said slideable sleeve and said valve.
Is assembly are urged towards the closed position, thereby cutting off the flow of gas. . . Preferably, said thermally activatable element may comprise a suitable plastics material, rubber or solder with a predetermined melting point. Said To thermally activatable element may be formed as a discrete protrusion or shoulder inside the periphery of said outlet port or can be formed integrally with said outlet port.
Further preferably, said valve assembly is provided as a movable ball as which, in a closed position, is urged against a seal. In an open position, said ball is held clear of said seal by one end of said slideable sleeve.
In a further embodiment, a flame arresting element may be provided in said thermally activatable safety coupling to provide extra safety to ensure So that the fire will not jump past said thermally activatable safety coupling, even in the event of a flammable gas mixture in said flexible conduits. In use, said flame arresting element may be provided using any suitable flame arresting material such as sintered metal.
It is believed that a thermally activatable safety coupling in accordance with the present invention at least addresses the problems outlined above. In particular, the advantages of the present invention are that a thermally activatable safety coupling of simple and economical construction is provided that is quick and easy to install. Advantageously, in a fire condition, the present invention is capable of preventing a fire progressing along a flexible lo hose and rapidly shuts off the gaseous supply. Operation of the present invention in a fire condition serves to protect the gaseous source and stops. ---I oxygen feeding the fire, thus reducing the fire risk to the user or patient andart their residence.
It will be obvious to those skilled in the art that variations of the present invention are possible and it is intended that the present invention may be. . used other than as specifically described herein. . : A specific non-limiting embodiment of the invention will be described by so way of example and with reference to the accompanying drawings in which: Figure 1 illustrates a cross section of the side elevation of the present invention.
Figure 2 shows a cross section of the side elevation of a further embodiment of the present invention.
Referring now to the drawings, the implementation of the present invention is illustrated in Figure 1. In use, the safety coupling 10 is formed as so a substantially elongate tube, from a suitable metallic or plastics material.
Typically, the safety coupling 10 will be situatediin the flexible hose (not shown) supplying oxygen to a patient's face mask (not shown). It can be situated close to the face mask or fitted near to the gas supply (not shown), which could be bottles or cylinders with a pressure regulator/flow controller or an oxygen concentrator unit or liquid oxygen system (not shown).
The safety coupling 10 comprises an inlet port 12 for connection to a gas supply source (not shown) and an outlet port 14 for connection to a patient's face mask (not shown). The direction of gaseous flow is from the inlet port 12 to the outlet port 14, as shown in Figure 1. The inlet port 12 and outlet port 14 have ridges or other protrusions 16 to connect to the flexible to hose (not shown), although it is envisaged that push- fit couplings or threaded sections could be provided for connection to the flexible hose (not shown) . . - Situated within the safety coupling 10, is a valve assembly which comprises a ball 18 and seal 20 arrangement. In use, the ball 18 is urged.
towards the seal 20 by use of a resilient means, which is typically a spring 22 under compression. . . On the other side of the ball 18, opposite to the spring 22, a slideable sleeve 24 is positioned which prevents the ball 18 from meeting with the face of the seal 20. One end 26 of the slideable sleeve 24 is in communication with the ball 18 and the other end 28 of the slideable sleeve 24 is engaged with a thermally activatable element 30 located at the end of the outlet port 14.
The thermally activatable element 30 is typically a suitable plastics material, rubber or solder with a predetermined melting point. In use, the thermally activatable element 30 is formed as a protrusion or shoulder inside the periphery of the outlet port 14, although the thermally activatable element 30 can be formed integrally with the outlet port 14, as shown in Figure 2.
Figure 2 shows a further safety coupling 10 according to the present So invention which is of a somewhat simpler construction to that illustrated in Figure 1. Essentially, the safety coupling 10 comprises two sections, namely an inlet port 12 for connection to the gas supply source (not shown) and an outlet port 14 for connection to the patient's face mask (not shown). As with the embodiment of Figure 1, the inlet port 12 and outlet port 14 are ridged or grooved 16 to facilitate connection to the flexible hose (not shown).
In normal operation, gas flows through the safety coupling 10 as indicated by the direction arrow in Figure 2, and passes though a normally-open valve assembly which comprises a ball 18 and seal 20 arrangement. The ball 18 being urged towards the seal 20 by use of a resilient means, which is typically a spring 22 under compression.
In direct contact with the other side of the ball 18, opposite to the spring 22, is a slideable sleeve 24 which is positioned to prevent the ball 18 from meeting with the face of the seal 20. One end 26 of the slideable sleeve 24 is in direct communication with the ball 18 and the other end 28 of the slideable Is sleeve 24 is directly engaged with a thermally activatable element 30 located at the end of the outlet port 14. The thermally activatable element 30 depicted in Figure 2 is formed integrally within the inner periphery of the outlet port 14, such that, in a fire condition, the thermally activatable element 30 at the tip of the outlet port 14 burns and melts which allows the slideable sleeve 24 to be go pushed outwards, via spring 22, which correspondingly urges the ball 18 towards seal 20, thereby cutting off the supply of gas. The integral thermally activatable element 30 at the tip of the outlet port 14 can be realised as a inner shoulder or protrusion within the outlet port 14. The outlet port 14 and integral thermally activatable element 30 being formed from any suitable low-melting point plastics material or the like.
As shown in Figures 1 and 2, the location of the thermally activatable element 30 at the very tip of the outlet port 14 ensures that if a fire in the flexible hose (not shown) burns back to the safety coupling 10, the thermally activatable element 30 is burned and melts which allows the slideable sleeve 24 to be pushed outwards of the outlet port 14 and the ball 18 meets with the seal 20, thereby cutting off the flow of gas. In this way, the safety coupling 10 is able to activate quickly and certainly before the flame burns back to the ball 18 and seal 20. To ensure that the flow of gas is not inhibited when the safety coupling 10 is in an open position, the end 26 of the slideable sleeve 24 in communication with the ball 18 has various openings or is slotted to permit gaseous flow.
In a further embodiment, a flame arresting element 32 is also positioned inside the safety coupling 10. The flame arresting element 32 is not necessary when pure oxygen is in the flexible hose (not shown), as the to metal body of the safety coupling 10 acts as a fire break, but it is included to prove extra safety to ensure the fire will not jump past the safety coupling 10 even in the event of a flammable gas mixture being in the flexible hose (not shown). Typically, the flame arresting element 32 may be provided using any suitable flame arresting material such as sintered metal.
Various alterations and modifications may be made to the present. . invention without departing from the scope of the invention. For example, . : . although the particular embodiments refer to a thermally activatable safety coupling for use in protecting domiciliary oxygen systems, this is in no way JO intended to be limiting as, in use, the present invention may be implemented in a variety of applications where there is a flammable gas or oxygen-rich mixture in the supply line.
Claims (20)
1. A thermally activatable safety coupling for use in connecting flexible s conduits supplying gas, comprising: an inlet port and an outlet port for coupling a gas supply source to a gas user appliance; a normally-open valve assembly situated between said inlet port and said outlet port, said valve assembly being displaceable between an open to position permitting gaseous flow and a closed position blocking gaseous flow; resilient means for urging said valve assembly towards said closed position; and a thermally activatable element situated at the outlet port being Am adapted to release said valve assembly at a predetermined temperature and.. , thereby causing the valve assembly to close.
::::e
2. A thermally activatable safety coupling as claimed in claim 1, wherein. .
said thermally activatable safety coupling is formed as a substantially elongate tube with said inlet port and said outlet port being located at each end thereto.
3. A thermally activatable safety coupling as claimed in any preceding claim, wherein said inlet port and said outlet port are provided with push-fit or ridged connectors for connection to said flexible conduits supplying gas.
4. A thermally activatable safety coupling as claimed in any preceding claim, wherein said inlet port is threaded for connection to said flexible conduits supplying gas.
5. A thermally activatable safety coupling as claimed in any preceding so claim, wherein said flexible conduits being any flexible hose suitable for supplying gas.
6. A thermally activatable safety coupling as claimed in any preceding claim, wherein said gas is oxygen.
7. A thermally activatable safety coupling as claimed in claim 1, wherein said gas supply source comprises bottles, cylinders, fixed oxygen concentrator unit or liquid oxygen system.
8. A thermally activatable safety coupling as claimed in claim 1, wherein said gas user appliance comprises a patient face mask or any application or lo treatment requiring oxygen to be supplied to a patient or user. are. .
9. A thermally activatable safety coupling as claimed in any preceding.* claim, further comprising a slideable sleeve positioned between said valve.
assembly and said thermally activatable element. ]5
10. A thermally activatable safety coupling as claimed in claim 9, wherein. . said valve assembly is urged against said slideable sleeve towards said.: closed position via said resilient means.
to
11. A thermally activatable safety coupling as claimed in any preceding claim, wherein said resilient means further comprises at least one compressed spring.
12. A thermally activatable safety coupling as claimed in any preceding claim, wherein said valve assembly further comprises a movable ball which, in said closed position, is urged against a seal.
13. A thermally activatable safety coupling as claimed in claim 12, wherein in a open position, said ball is held clear of said seal by one end of said so slideable sleeve.
14. A thermally activatable safety coupling as claimed in claims 9 or 10, wherein, in a fire condition, heat generated by the fire as it burns backwards towards said gas supply source is above said predetermined temperature, said thermally activatable element yields and said slideable sleeve and said valve assembly are urged towards said closed position, thereby cutting off the flow of gas.
15. A thermally activatable safety coupling as claimed in any preceding claim, wherein said thermally activatable element comprises a suitable to plastics material, rubber or solder with a predetermined melting point.
16. A thermally activatable safety coupling as claimed in any preceding claim, wherein said thermally activatable element is formed as a discrete protrusion or shoulder inside the periphery of said outlet port. , Is
17. A thermally activatable safety coupling as claimed in any preceding claim, wherein said thermally activatable element is formed integrally with said outlet port.
go
18. A thermally activatable safety coupling as claimed in any preceding claim, further comprising a flame arresting element provided between said inlet port and outlet port.
19. A thermally activatable safety coupling as claimed in claim 18, wherein said flame arresting element comprises using any suitable flame arresting material such as sintered metal.
20. A thermally activatable safety coupling as described herein with reference to Figures 1 and 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0420850A GB0420850D0 (en) | 2004-09-20 | 2004-09-20 | Thermally activatable safety coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0519155D0 GB0519155D0 (en) | 2005-10-26 |
| GB2418239A true GB2418239A (en) | 2006-03-22 |
Family
ID=33306874
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0420850A Ceased GB0420850D0 (en) | 2004-09-20 | 2004-09-20 | Thermally activatable safety coupling |
| GB0519155A Withdrawn GB2418239A (en) | 2004-09-20 | 2005-09-20 | Thermally activated safety coupling for oxygen supply |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0420850A Ceased GB0420850D0 (en) | 2004-09-20 | 2004-09-20 | Thermally activatable safety coupling |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0420850D0 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008068508A1 (en) * | 2006-12-08 | 2008-06-12 | Bpr Medical Ltd | Safety valve unit |
| WO2008075035A1 (en) | 2006-12-21 | 2008-06-26 | Bpr Medical Ltd | Safety valve |
| EP2133113A1 (en) * | 2008-05-23 | 2009-12-16 | The BOC Group Limited | Oxygen administration apparatus |
| US7980002B2 (en) * | 2004-11-16 | 2011-07-19 | Röhren-und Pumpenwerk Bauer Gesellschaft mbH | Rotary drum for the aerobic heating of pourable solids |
| CN103423242A (en) * | 2013-07-16 | 2013-12-04 | 燕山大学 | Split-type logic flow blocking control method and device thereof |
| GB2504553A (en) * | 2012-08-03 | 2014-02-05 | Bpr Medical Ltd | Flexible Medical Tubing Fire Safety Valve |
| CN111336341A (en) * | 2020-03-20 | 2020-06-26 | 海洋石油工程（青岛）有限公司 | Automatic management equipment for gas zone state |
| JP2020162968A (en) * | 2019-03-29 | 2020-10-08 | 株式会社医器研 | Medical gas coupling, nasal cannula, and oxygen gas supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB992900A (en) * | 1964-01-17 | 1965-05-26 | Hansen Mfg Co | Quick disconnect coupling |
| GB1070359A (en) * | 1965-04-22 | 1967-06-01 | Gas Council | Improvements relating to couplings for pipes |
| GB2252803A (en) * | 1991-02-14 | 1992-08-19 | Arnold | Heat activatable safety valve for gas installation |
| US5927312A (en) * | 1998-02-27 | 1999-07-27 | Dryden; Paul E. | Method and apparatus for extinguishing combustion within combustible tubing |
-
2004
- 2004-09-20 GB GB0420850A patent/GB0420850D0/en not_active Ceased
-
2005
- 2005-09-20 GB GB0519155A patent/GB2418239A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB992900A (en) * | 1964-01-17 | 1965-05-26 | Hansen Mfg Co | Quick disconnect coupling |
| GB1070359A (en) * | 1965-04-22 | 1967-06-01 | Gas Council | Improvements relating to couplings for pipes |
| GB2252803A (en) * | 1991-02-14 | 1992-08-19 | Arnold | Heat activatable safety valve for gas installation |
| US5927312A (en) * | 1998-02-27 | 1999-07-27 | Dryden; Paul E. | Method and apparatus for extinguishing combustion within combustible tubing |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7980002B2 (en) * | 2004-11-16 | 2011-07-19 | Röhren-und Pumpenwerk Bauer Gesellschaft mbH | Rotary drum for the aerobic heating of pourable solids |
| WO2008068508A1 (en) * | 2006-12-08 | 2008-06-12 | Bpr Medical Ltd | Safety valve unit |
| US8602048B2 (en) | 2006-12-21 | 2013-12-10 | Bpr Medical Limited | Apparatus and instruments for handling gas and incorporating a safety valve unit |
| WO2008075035A1 (en) | 2006-12-21 | 2008-06-26 | Bpr Medical Ltd | Safety valve |
| GB2457001A (en) * | 2006-12-21 | 2009-08-05 | Bpr Medical Ltd | Safety valve |
| GB2457001B (en) * | 2006-12-21 | 2011-07-27 | Bpr Medical Ltd | Safety valve |
| EP2133113A1 (en) * | 2008-05-23 | 2009-12-16 | The BOC Group Limited | Oxygen administration apparatus |
| GB2504553A (en) * | 2012-08-03 | 2014-02-05 | Bpr Medical Ltd | Flexible Medical Tubing Fire Safety Valve |
| WO2014020334A1 (en) * | 2012-08-03 | 2014-02-06 | Bpr Medical Limited | Firesafe coupling |
| CN104519939A (en) * | 2012-08-03 | 2015-04-15 | Bpr医学有限公司 | Firesafe coupling |
| US10406391B2 (en) | 2012-08-03 | 2019-09-10 | Bpr Medical Limited | Firesafe coupling |
| CN104519939B (en) * | 2012-08-03 | 2020-03-03 | Bpr医学有限公司 | Fireproof connector |
| CN103423242A (en) * | 2013-07-16 | 2013-12-04 | 燕山大学 | Split-type logic flow blocking control method and device thereof |
| CN103423242B (en) * | 2013-07-16 | 2016-10-05 | 燕山大学 | Split-type logic flow blocks control method and device thereof |
| JP2020162968A (en) * | 2019-03-29 | 2020-10-08 | 株式会社医器研 | Medical gas coupling, nasal cannula, and oxygen gas supply device |
| JP7013409B2 (en) | 2019-03-29 | 2022-01-31 | 株式会社医器研 | Medical gas coupling, nasal cannula and oxygen gas supply |
| CN111336341A (en) * | 2020-03-20 | 2020-06-26 | 海洋石油工程（青岛）有限公司 | Automatic management equipment for gas zone state |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0420850D0 (en) | 2004-10-20 |
| GB0519155D0 (en) | 2005-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |