GB2499087A - Gas pressure regulator with integrated over-pressure mechanism, including indicating and reset means - Google Patents
Gas pressure regulator with integrated over-pressure mechanism, including indicating and reset means Download PDFInfo
- Publication number
- GB2499087A GB2499087A GB1222499.4A GB201222499A GB2499087A GB 2499087 A GB2499087 A GB 2499087A GB 201222499 A GB201222499 A GB 201222499A GB 2499087 A GB2499087 A GB 2499087A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- pressure
- chamber
- pressure regulator
- pin
- 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
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 22
- 239000011324 bead Substances 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 45
- 230000001105 regulatory effect Effects 0.000 description 4
- XCKKIKBIPZJUET-VYKNHSEDSA-N morphine hydrochloride Chemical compound Cl.O([C@H]1[C@H](C=C[C@H]23)O)C4=C5[C@@]12CCN(C)[C@@H]3CC5=CC=C4O XCKKIKBIPZJUET-VYKNHSEDSA-N 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003915 liquefied petroleum gas Substances 0.000 description 2
- 239000001273 butane Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
- G05D16/0683—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The pressure regulator comprises a body 1 defining at least one chamber 7, 9 into which lead a gas inlet 11 and outlet 13, means 3, 17, 23, 25 for reducing the pressure of the gas inside the said chamber 7, 9, and means 33 for blocking the circulation of the gas between said inlet 11 and said outlet 13 when the gas pressure inside the said chamber 7, 9 exceeds a predetermined threshold. A reset pin 55 is also provided and means 57, 59 to indicate the circulation of gas has been blocked.
Description
1
GAS PRESSURE REGULATOR WITH INTEGRATED OVER-PRESSURE
PROTECTION
The present patent application relates to a pressure regulator with integrated over-5 pressure protection.
Wide use is given to Liquid Petroleum Gas (LPG e.g. butane, propane, or mixtures of these gases) for domestic use.
10 This gas is used to operate domestic appliances such as boilers or gas cookers.
This is frequently stored under high pressure in the liquid state in reservoirs (cylinders or tanks) whose capacity can typically vary from 3 kg to 1500 kg, and which are replaced or refilled when they are empty.
15
The gas arriving in boilers or gas cookers must be at a much lower pressure than the reservoir storage pressure; this pressure of use must typically be of the order of 28, 37 or 50 mbar.
20 A pressure reducing device must therefore be placed between the gas reservoir and the domestic appliance under consideration: a said device, commonly called a pressure regulator, makes it possible by means of a valve system to regulate the flow rate (typically 4 to 5 kg gas per hour) and pressure (typically 28, 37 or 50 mbar) of the gas supplied to the domestic appliance.
25
It may happen that the pressure regulator does not properly perform its function, for example on account of excessive fouling, and no longer allows sufficient regulating of the pressure of the gas arriving from the storage reservoir.
30 In this case, the pressure of the gas fed to the domestic appliance is too high, and this may have harmful effects: deterioration of equipment, poor combustion, flame blowout, gas leak.
2
On this account, systems are known in the prior art commonly called Over Pressure Shut-Off « OPSO » systems, which allow the gas flow leaving the pressure regulator to be interrupted in the event of over-pressure of this gas.
5 A said system is supplied separate from the pressure regulator itself and has to be coupled thereto when being installed.
This results in increased complexity of the installation, additional connections that are potentially the source of leaks and greater bulk.
10
It is therefore the particular objective of the present invention to reduce these disadvantages.
This objective is achieved with the invention by means of a gas pressure regulator 15 comprising a body defining at least one chamber into which lead a gas inlet and gas outlet, means for reducing the gas pressure inside the said chamber, and means for blocking the circulation of gas between the said inlet and the said outlet when the gas pressure inside the said chamber exceeds a predetermined threshold, these means for blocking the circulation of the gas comprising an obturator pin mobile between an 20 open position and a complete shut-off position of the said gas inlet, elastic return means to move this obturator pin to its complete shut-off position, means for locking this obturator pin in its open position and means for controlling the opening of these locking means when the gas pressure in the said chamber exceeds a predetermined threshold
25 the said pressure regulator also comprising means, on the outside of the pressure regulator, to indicate the changeover of the said obturator pin from its open position to its complete shut-off position, these means comprising a pushbutton comprising a head visible on the outside of the pressure regulator and a reset pin, and the said reset pin extending in a direction substantially perpendicular to the 30 direction of the shank of the said obturator pin, elastic means returning the said pushbutton to inside the said pressure regulator, a bevel being formed at the end of the shank of the said obturator pin and a bead being inter-positioned between the end of the said reset pin and the said bevel.
3
By means of these characteristics an overpressure protection system is obtained which is integrated in the pressure regulator, making it possible to overcome the constraints of installing and connecting an additional item of equipment, and to limit overall volume to the size of the pressure regulator alone; this safety system also allows 5 immediate viewing from the outside when the over-pressure safety system has tripped.
According to other optional characteristics of the pressure regulator according to the invention:
10 - the said means for reducing the pressure of the gas inside the said chamber comprise a lever mobile between a plurality of partial shut-off positions of the said inlet, and means for moving this lever towards an increased shut-off position when the gas pressure inside the chamber increases;
- the said means for moving the lever comprise a first elastic membrane forming one 15 of the walls of the said chamber, a first spring acting on this first elastic membrane in the direction of the said chamber, and a first clevis secured to this membrane and cooperating with the said lever;
- the said locking means comprise a notch formed in the shank of the said obturator pin, and a bead mobile between a locked position in which it is placed in the said
20 notch, and a unlocked position in which it is drawn away from the said notch;
- the said control means of the said locking means comprise a second elastic membrane forming one of the walls of the said chamber, a second spring acting on this second elastic membrane in the direction of the said chamber and a locking pin connected to the said membrane and in contact with the said bead;
25 - the said pressure regulator comprises a valve discharging into the atmosphere, adapted to open under the effect of the gas pressure inside the said chamber when this pressure exceeds a safety threshold lower than the said predetermined threshold.
Other characteristics and advantages of the present invention will become apparent in 30 the light of the following description and on examining the appended Figures in which:
4
Figure 1 is a perspective cross-sectional view along line A-C in Figure 4 of a pressure regulator according to the invention when it is in normal operating configuration;
5 Figure 2 is a cross-sectional view along line A-B in Figure 4 of this pressure regulator in normal operating configuration;
Figure 3 is a cross-sectional view along line C-D in Figure 4 of this pressure regulator in normal operating configuration;
10
Figure 4 is a cross-sectional view along line E-F in Figure 2 of this pressure regulator in normal operating configuration; and
Figures 5, 6 and 7 are similar views to Figures 2, 3 and 4 respectively of this 15 pressure regulator in OPSO configuration i.e. shut-off in the event of over pressure.
With reference to Figures 1 to 4, it can be seen that the pressure regulator according to the invention comprises a body 1 closed by a first elastic membrane 3 and by a 20 second elastic membrane 5 formed of pressed plate for example.
These first 3 and second 5 elastic membranes, together with the body 1, define the first 7 and respectively second 9 chambers which communicate with each other.
25 As can be seen in particular in Figures 2 and 4, a gas inlet 11 and a gas outlet 13 communicate with the chambers 7 and 9.
More specifically, as can be seen in particular in Figure 2, the gas inlet 11 communicates with the first chamber 7 via an orifice 15 which can be more or less 30 shut off by a lever 17 pivot mounted about a shaft 19.
This lever 17 is provided with a rod 21 cooperating with a first clevis 23 secured to the first elastic membrane 3. A first spring 25 held by a first cover 27 acts on the first membrane 3 in the direction of the first chamber 7.
5
It is to be noted that the first clevis 23 is connected to a valve 29 discharging into the atmosphere, returned to its shut position by a spring 31 particular to it.
5 An obturator pin 33, provided with a shutter 35 located inside the inlet 11 and with a shank 37 mounted slidingly in a tubular continuation 39 of this inlet 11, is mobile between an open position which can be seen in Figures 1, 2 and 4 in which gas is able to circulate from the inlet 11 to the orifice 15, and a fully shut-off position which can be seen in Figures 5 and 7 in which this circulation of gas is no longer possible.
10
The shank 37 comprises a notch 41 inside which a first bead 43 can be housed pushed by a locking pin 45 connected do the second elastic membrane 5 via a second clevis 46, it being noted that this second elastic membrane 5 is itself pushed in the direction of the second chamber 9 by a second spring 47 similar to the first spring 25.
15
It is also noted that a spring 49 arranged around the shank 37 of the obturator pin 33 returns this pin to its fully shut position of the gas inlet 11.
At its end opposite the end on which the shutter 35 is located, the shank 37 has a 20 bevelled end 51 which can be seen in particular in Figure 4 cooperating with a second bead 53 itself held under pressure against this bevelled part 51 by the reset pin 55 of a pushbutton 57 whose head 59 is visible on the outside of the pressure regulator according to the invention.
25 The holding under pressure of the bead 53 by the reset pin 55 is ensured by a spring 61, mounted inside the head 59 of the pushbutton 57.
When the pressure regulator of the invention is in OPSO safety position, as can be seen in Figures 5 to 7, the obturator pin 33 has undergone sliding towards the right in 30 Figures 5 and 7, so that:
- the shutter 35 of the obturator pin 33 shuts off the gas inlet 11 ;
6
- the first bead 43 has moved out of the notch 41 of the shank 37 of this obturator pin; and
- the second bead 53 is pushed back by the bevel 51 of the shank 37, so 5 that the head 59 of the pushbutton 57 is pushed to outside the pressure regulator, causing a coloured mark 63 to become visible arranged on the head 59 of the pushbutton 57 when this mark has moved from an opaque zone to a translucent zone on a cap 65 covering the head 59.
10
The operating mode and the advantages of the present invention result directly from the foregoing description.
In normal operating mode, which can be seen in Figures 1 to 4, the gas under high 15 pressure arriving from a storage reservoir such as a cylinder or tank, enters inside the gas inlet 11 and passes towards the orifice 15, the shutter 35 of the obturator pin 33 allowing this passing.
The pressure set up by this gas inside the chambers 7 and 9 acts on the first elastic 20 membrane 3 which is capable of moving against the first spring 25 when this pressure increases.
The effect of this increase in pressure is to cause the axial movement of the first clevis 23, which in turn causes rotation of the lever 17 about its rotation shaft 19 25 thereby allowing the regulating of the gas flow inlet rate through the orifice 15, and hence the pressure inside the chambers 7 and 9 and finally the pressure delivered at the gas outlet 13.
If the gas pressure inside the chambers 7 and 9 exceeds a first safety threshold, gas is 30 able to escape via the valve 29 discharging into the atmosphere, whose associated spring 31 is suitably calibrated.
This valve device discharging into the atmosphere allows small over-pressures to be managed which are frequent during routine functioning of a pressure regulator.
7
If, for any reason, the gas pressure inside the chambers 7 and 9 nevertheless continues to rise, the particular safety device of the invention comes into action.
5 A said increase in pressure may be due for example to fouling of the lever 17 which no longer performs its role in regulating the gas flow rate, so that the pressure prevailing inside the chambers 7 and 9 becomes higher than a predetermined safety threshold.
10 The particular safety device of the invention operates in the following manner.
The increase in gas pressure inside the chambers 7 and 9 causes the second membrane 5 to be pushed back against the spring 47, so that the locking pin 45 and thereby the first bead 43 are drawn away from the notch 41 formed in the shank 37 of the 15 obturator pin 33.
By so doing, and under the action of the spring 49 positioned around this shank, the obturator pin 33 slides towards the right in Figures 2 and 4 until it comes to lie in the position shown in Figures 5 and 7.
20
In this latter position, the shutter 35 of the obturator pin 33 shuts off the gas inlet 11 and the second bead 53 has been pushed back by the bevel 51 of the shank 37 causing the push button 57 to move out of the pressure regulator and whose head 59 then becomes visible for a user; this visibility can be increased by the coloured mark 63 25 arranged on the head 59 of the pushbutton 57 which moves from the opaque part over to the translucent part of the cap 65.
As will be understood in the light of the foregoing, the safety system of the invention allows the total blocking of the gas flow through the pressure regulator when the 30 pressure inside the chamber 7 and 9 of this pressure regulator exceeds a predetermined safety level, higher than the pressure threshold causing the opening of the valve 29 discharging into the atmosphere.
8
The safety system according to the invention is therefore a simple, very reliable system allowing major over-pressures to be prevented downstream of the pressure regulator, as well as all risks inherent in any ill-functioning of the pressure regulating function.
5
When the pressure inside the chambers 7 and 9 has returned to normal, the spring 47 pushes on the second elastic membrane 5 with greater pressure than the prevailing pressure, so that the locking pin 45 pushes the first bead 43 against the shank 37 of the obturator pin 33.
10
To reset the pressure regulator of the invention i.e. to replace it in its normal operating configuration, all that is required is for the user to press on the translucent cap 65 by means of which the second bead 53 pushes on the bevel 51 of the shank 37 of the obturator pin 33 causing the translation of this obturator pin towards the left in 15 Figures 5 and 7, until the first bead 43 comes to reposition itself inside the notch 41 formed on the shank 37, thereby ensuring the blocking of the obturator pin 33 in its open position as can be seen in Figures 1, 2 and 4.
Evidently, the present invention is in no way limited to the embodiments described 20 and illustrated which are given as mere examples.
9
Claims (6)
1. A gas pressure regulator comprising a body (1) defining at least one chamber 5 (7, 9) into which lead a gas inlet (11) and outlet (13), means (3, 17, 23, 25) for reducing the gas pressure inside the said chamber (7, 9), and means for blocking the circulation of the gas between the said inlet and the said outlet when the pressure of the gas inside the said chamber (7, 9) exceeds a predetermined threshold, these means blocking the circulation of the gas comprising an obturator pin (33) mobile between 10 an open position and a fully shut position of the said gas inlet (11), elastic return means (49) to move this obturator pin (33) towards its fully shut position, means (5, 41, 43, 45, 47) for locking this obturator pin (33) in its open position, and means for controlling the opening of these locking means when the pressure of the gas inside the said chamber (7, 9) exceeds a predetermined threshold,
15 the said pressure regulator also comprising means (49, 51, 53, 55, 57, 59) to indicate on the outside of the pressure regulator the changeover of the said obturator pin (33) from its open position to its fully shut position, this means comprising a pushbutton (57) having a head (59) visible on the outside of the pressure regulator and a reset pin (55),
20 the said reset pin (55) extending in a direction substantially perpendicular to the direction of the shank (37) of the said obturator pin (33), elastic means (49) returning the said pushbutton (57) towards inside the said pressure regulator, a bevel (51) being formed on the end of the shank (37) of the said obturator pin (33), and a bead (53) being inter-positioned between the end of the said reset pin (55) and the said bevel 25 (51).
2. The pressure regulator according to claim 1, wherein the said means for reducing the pressure of the gas inside the said chamber comprise a lever (17) mobile between a plurality of partial shut-off positions of the said inlet (11), and means (3,
30 23, 25) for moving this lever towards an increased shut-off position when the gas pressure inside the said chamber increases.
3. The pressure regulator according to claim 2, wherein the said means for moving the said lever comprise a first elastic membrane (3) forming one of the walls
10
of the said chamber (7, 9), a first spring (25) acting on this first elastic membrane (3) in the direction of the said chamber (7, 9), and a first clevis (23) secured to this membrane (3) and cooperating with the said lever (17).
5
4. The pressure regulator according to any of the preceding claims, wherein the said locking means comprise a notch (41) formed in the shank (37) of the said obturator pin (33), and a bead (43) mobile between a locked position in which it is placed inside the said notch (33), and an unlocked position in which it is drawn away from the said notch (33).
10
5. The pressure regulator according to any of the preceding claims, wherein the said control means of the said locking means comprise a second elastic membrane (5) forming one of the walls of the said chamber (7, 9), a second spring (47) acting on this second elastic membrane (5) in the direction of the said chamber (7, 9), and a
15 locking pin (45) connected to the said membrane (5) and in contact with the said bead (43).
6. The pressure regulator according to any of the preceding claims, comprising a valve (29) discharging into the atmosphere, adapted to open under the effect of the
20 gas pressure inside the said chamber (7, 9) when this pressure exceeds a safety threshold lower than the said predetermined threshold.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1161982A FR2984448B1 (en) | 2011-12-20 | 2011-12-20 | INTEGRATED PRESSURE SAFETY GAS REGULATOR |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201222499D0 GB201222499D0 (en) | 2013-01-30 |
| GB2499087A true GB2499087A (en) | 2013-08-07 |
| GB2499087B GB2499087B (en) | 2017-07-19 |
Family
ID=47630677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1222499.4A Active GB2499087B (en) | 2011-12-20 | 2012-12-13 | Gas pressure regulator with integrated over-pressure protection |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2984448B1 (en) |
| GB (1) | GB2499087B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11187340B2 (en) * | 2018-06-18 | 2021-11-30 | Clesse Industries | Gas pressure reducer |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3065512B1 (en) * | 2017-04-21 | 2019-06-21 | Alcrys Fluid Control & Services | DETENDER WITH INTEGRATED SAFETY VALVE FOR DISCHARGE IN CASE OF DOWNSTREAM PRESSURE |
| WO2020079328A1 (en) | 2018-10-18 | 2020-04-23 | Alcrys Fluid-Control & Services | Pressure regulator with inbuilt safety valve to relieve pressure in the event of an overpressure downstream |
| IT201900002275A1 (en) | 2019-02-15 | 2020-08-15 | Cavagna Group Spa | PRESSURE REGULATOR |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0907119A1 (en) * | 1997-10-03 | 1999-04-07 | NOVA COMET S.r.l. | Manual resetting excess flow control valve particularly for use with gas pressure regulators |
| WO2006098577A1 (en) * | 2005-03-17 | 2006-09-21 | Hucons Technology Co., Ltd. | A low pressure lpg regulator with self-closing function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3706579A1 (en) * | 1987-02-28 | 1988-06-09 | Gok Gmbh & Co Kg | Gas-pressure regulating device with safety shut-off valve |
| AU605168B2 (en) * | 1987-08-25 | 1991-01-10 | Rong-Chao Chuang | Forward direction closing safety valve device for automatically shutting the gas pipeline passage off during pressure reducing failure |
| DE3813962B4 (en) * | 1988-04-26 | 2004-07-15 | Gok Regler- Und Armaturen Gmbh & Co. Kg | Two-stage gas pressure regulator |
| US5203371A (en) * | 1992-11-05 | 1993-04-20 | Teay Jaw Shiunn | Gas regulator with several stage adjustment |
-
2011
- 2011-12-20 FR FR1161982A patent/FR2984448B1/en active Active
-
2012
- 2012-12-13 GB GB1222499.4A patent/GB2499087B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0907119A1 (en) * | 1997-10-03 | 1999-04-07 | NOVA COMET S.r.l. | Manual resetting excess flow control valve particularly for use with gas pressure regulators |
| WO2006098577A1 (en) * | 2005-03-17 | 2006-09-21 | Hucons Technology Co., Ltd. | A low pressure lpg regulator with self-closing function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11187340B2 (en) * | 2018-06-18 | 2021-11-30 | Clesse Industries | Gas pressure reducer |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2984448A1 (en) | 2013-06-21 |
| FR2984448B1 (en) | 2014-11-21 |
| GB2499087B (en) | 2017-07-19 |
| GB201222499D0 (en) | 2013-01-30 |
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