GB2028426A - Pressure Relief Valve Apparatus - Google Patents
Pressure Relief Valve Apparatus Download PDFInfo
- Publication number
- GB2028426A GB2028426A GB7926218A GB7926218A GB2028426A GB 2028426 A GB2028426 A GB 2028426A GB 7926218 A GB7926218 A GB 7926218A GB 7926218 A GB7926218 A GB 7926218A GB 2028426 A GB2028426 A GB 2028426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relief valve
- rupture disk
- cylindrical portion
- annular
- flange
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 14
- 201000004356 excessive tearing Diseases 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
- F16K17/1606—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the reverse-buckling-type
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
- F16K17/1606—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the reverse-buckling-type
- F16K17/1613—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs of the reverse-buckling-type with additional cutting means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
An isolating apparatus for installation between the annular seating surface of the inlet nozzle of a fluid pressure relief valve and the corresponding surface of the inlet flange to which the relief valve is to be connected, comprises a support body having a cylindrical portion 64 which in use extends into the interior of the inlet flange a radially extending annular flat flange portion 62 at one end and a scored reverse buckling rupture disk 68 which is seal welded to the other end of the cylindrical portion to isolate the interior of the relief valve from the interior of the vessel or system being protected. <IMAGE>
Description
SPECIFICATION
Pressure Relief Valve Apparatus
The present invention relates to pressure relief valve isolating apparatus.
To protect vessels or systems containing fluid pressure from reaching overpressure conditions, spring operated relief valves are connected directly to the vessels or systems without shut-off valves therebetween so that the relief valves cannot be inadvertently removed from service.
Rupture disc pressure relief devices are also utilized to provide backup overpressure protection, the spring operated relief valves usually being set to relieve at a lower pressure than the rupture disk devices, since relief valves automatically close after an overpressure condition has been relieved thereby avoiding the necessity of interrupting operations to replace parts, etc.
When the spring operated relief valves are continuously exposed to fluid pressure, the valve seats often wear or corrode causing fluids to leak and/or causing improper operation of the relief valve. As a result, safety codes have been adopted which require periodic testing and maintenance of relief valves, resulting in interrupting the operation of the vessels or system being protected.
To overcome these difficulties, relief valve isolating apparatus of the rupturable type have been installed between the relief valve and the vessel or system, this apparatus including a rupturable member, which isolates the relief valve from the fluid under pressure, and which is designed to rupture at a pressure slightly less or equal to the pressure at which the relief valve is set to open.
Known relief valve isolating apparatuses have often been of a size such that when installed in an existing system having outlet piping connected to the outlet port of the relief valve, the latter has to be raised to accommodate the isolating apparatus, which requires the outlet piping to be modified. The difficulty and expense of such modifications have often discouraged the use of the isolating apparatus.
In addition, the known isolating apparatus has been comprised of several parts which must be assembled when the apparatus is installed, giving rise to mistakes being made during assembly, e.g., installing the rupture disc upside-down, misalignment of the rupture disc, and installing the entire assembly incorrectly so that it does not operate properly.
According to the present invention, we provide an isolating apparatus for installation between the annular seating surface of the inlet nozzle of the fluid pressure relief valve and the corresponding surface of the inlet flange to which the relief valve and inlet nozzle are to be connected, said isolating apparatus including a support body having a cylindrical portion for extension into the interior of said inlet flange and a radially extending annular flat flange portion at one end of the cylindrical portion, and a rupturable member in the form of a reverse buckling rupture disc provided with scores, said rupture disc being seal welded to the other end of the cylindrical portion.
Such an apparatus can be of one-piece construction, which cannot be assembled or installed incorrectly and which minimizes changes required to downstream piping of existing systems.
When the apparatus of the invention is installed between the inlet nozzle of a relief valve and the inlet flange to which the relief valve connects, the rupture disc thereof is positioned a sufficient distance from the inlet nozzle whereby fully opening of the rupture disc is ensured.
In order that the invention will more readily be understood, the following description is given, merely by way of example, reference being made to the accompanying drawing, in which:
Figure 1 is a side sectional view of a relief valve connected to an inlet flange with the apparatus of the present invention positioned therebetween;
Figure 2 is an enlarged sectional view of a portion of the apparatus of Figure 1, after the rupture thereof; and
Figure 3 is a perspective exploded view of the various parts of the apparatus of the present invention prior to welding such parts together.
Referring to Figure 1, the apparatus of the present invention, generally designated by the numeral 10, is illustrated installed between a relief valve 12 and the inlet flange 14 thereof. The relief valve 12 includes a body 1 6 having a flange 1 8 for connection to the inlet flange 14 by a plurality of studs and nuts. An outlet flange 20 is provided for connection to a complementary flange which can in turn be attached to downstream piping (not shown) for conducting fluids flowing through the relief valve 12 to a desired area. An inlet nozzle 22 is threaded to the interior of the flange 1 8 and projects into the interior of the body 16. The upper end 24 of the nozzle 22 terminates in a circular port against which bears a valve head 36 carried by a stem 38, slidable in a sleeve 39 together forming a valve member 26.The lower end of the nozzle 22 includes an annular flange 28 having an annular seating surface 30 for engaging an annular seating surface 32 on the inlet flange 14.
Sleeve 39 is connected to a plate 40 which closes the valve body 1 6 and diverts fluids to the passage within outlet flange 20.
Bolted to the body 1 6 is a spring housing 40 in which is disposed spring biasing means 44 including a valve stem 46 having a lower bulbous end which bears against the top of the pushrod 38. The upper end 50 of the valve stem 46 is reciprocally mounted within a spring adjustment sleeve 52 threaded to the housing 42. A spring 58 is disposed between upper and lower washers 54 and 56 and around the valve stem 46, to urge the valve stem 46 and the valve closure means 26 into the closed position. The spring pressure exerted on the valve stem 46 and the valve closure means 26 can be increased or decreased by rotating the threaded sleeve 52 whereby it is moved downwardly or upwardly.
Because the portion of the apparatus 10 clamped between the nozzle 22 and the inlet flange 1 4 is thin, its installation elevates the relief valve 12 with respect to the inlet flange 14 only a minor distance which obviates or at least minimizes changes required to downstream piping in an existing system.
The apparatus 10 comprises a support body 60 having a cylindrical portion 64 and a radially extending annular flat flange portion 62. A flat ring 66, when used, and a scored reverse buckling rupture disc 68 are seal welded over the end 70 of the cylindrical portion 64 of the support body whereby the cylindrical portion 64 is closed by the rupture disc 68. A cylindrical rupture disc protecting shield 72 is optionally welded to the rupture disc 68, and preferably has the same internal diameter and thickness as the cylindrical portion 64 of the support body 60.
The scored reverse buckling rupture disc 68 preferably includes an annular flange portion 74 connected to a concave-convex portion 76 by an annular transition connection 78. A plurality of scores 80 are formed on a surface of the concaveconvex portion 76 of the rupture disc 68 so that lines of weakness are formed in the concaveconvex portion 76. Preferably, four scores 80 are provided which radiate outwardly from the centre of the concave-convex portion 76 whereby the concave-convex portion is divided into quadrants thereby.
The diameter of the concave-convex portion 76 of the rupture disc 68 is preferably equal to or only slightly less than the internal diameter of the cylindricalportion 64 of the support body 60, and the annular flange portion 74 thereof is seal welded to the end 70 of the cylindrical portion 64.
When used, the ring 66 has an internal diameter such that it extends into the interior of the cylindrical portion 64 of the body 60 a distance in the range of from about 1.59 mm to about 3.18 mm past the transition connection 78 of the rupture disc 68. In a preferred embodiment of the apparatus 10, the rupture disc 68, shield 72 and ring 66, if used, are welded to the end 70 of the cylindrical portion 64 of the support body 62 by a single continuous weld as illustrated in Figure 2.
As indicated above, the inclusion of the ring 66 in the apparatus 10 is optional. However, it has been found that in smaller sizes of the apparatus 10, i.e., sizes for use with 76 mm and smaller relief valves, the ring 66 prevents excessive tearing of the rupture disc 68 and the formation of loose pieces thereof when the disc reverses and ruptures. Also, the ring 66 helps prevent abnormal operation of the rupture disc 68 due to misalignment of the rupture disc, etc., by providing an inwardly extending shoulder, forming a support for the transition connection 78 thereof.
Without such support, tearing and erratic rupture can occur, i.e., reversal which starts at the transition connection 78 instead of near the centre of the concave-convex portion 76 of the rupture disc 68 bringing about only partial opening or other adverse effect. When the pressure on the convex side of the rupture disc exceeds the design pressure, the disc reverses itself and tears along the lines of weakness formed by the scores 80 whereby petals 82 are formed.which bend upwardly adjacent the interior of cylindrical portion 64, and some tearing takes place on each side of the petals in the transition connection at the area designated by the numeral 83 in Figure 2.There is a tendency for one or more of the petals 82 to tear completely away because of the small radius of curvature of the transition connection, but the ring 66 prevents this by causing the petals 82 to bend around the ring 66 inwardly of the transition connection. In larger sizes of the apparatus 10, the radius of curvature of the transition connection 78 is large enough to prevent complete tearing at the transition connection and the ring 66 is not required.
When a reverse buckling rupture disc without scores is welded to a support member in the manner described herein, the consequent heating of the rupture disc produces stresses therein, particularly at the transition connection area, which materially changes the reversal pressure, often drastically. However, it has been found that because a scored reverse buckling rupture disc reverses from the centre outwardly instead of from the transition connection inwardly as do other reverse buckling discs, the stresses produced at the transition connection area do not affect the operation of the disc, and thus, the apparatus of the present invention oherates reliably.
When the parts are welded together, a onepiece pressure rupturable relief valve isolating apparatus is provided which cannot be installed upside-down and which does not have to be precisionally aligned in order to achieve proper operation. When the apparatus is assembled as shown, because the cylindrical portion64, which extends into the interior of the inlet flange 14, is of a greater diameter than the internal diameter of the nozzle 22, the apparatus 10 cannot be installed upside-down between the inlet flange
14 and the relief valve 12. Further, the alignment of the rupture disc 68 and support ring 66, if used, with respect to the support body 60 is accurately set at the factory and alignment of the apparatus 10 between the relief valve 12 and inlet flange 14 is not necessary. Also, the length of the cylindrical portion 64 is selected so that the
rupture disc 68 is positioned a sufficient distance
below the inlet nozzle 22 of the relief valve 12 whereby full opening of the rupture disc is
ensured, i.e., the petals 82 are not prevented from opening fully by contact with the smaller diameter
inlet nozzle 22.
A pair of conventional gaskets 84 can be utilized between the annular flange portion 62 of the support body 60 and the seating surfaces of the inlet flange 14 and nozzle 22 to provide a pressure seal and prevent fluid under pressure from escaping to the atmosphere.
As illustrated in Figure 1, the convex side of the scored reverse buckling rupture disc 68 is exposed to the fluid under pressure within the system being protected and the fluid is prevented from entering the inlet nozzle 22 of the relief valve 12 by the apparatus 10. The rupture characteristics of the rupture disc 68 are selected so that reversal and rupture of the rupture disc take place at a fluid pressure slightly less or equal to the fluid pressure at which the relief valve 12 is is set to open.
Consequently, the fluid under pressure does not reach the internal portions of the relief valve 12 until an overpressure condition is reached in the system being protected whereupon the rupture disc 68 reverses and ruptures as illustrated in Figure 2. Upon rupture, the fluid under pressure enters the inlet nozzle 22 of the relief valve 1 2 and the valve closure means 26 thereof opens to relieve the overpressure condition.
The reverse buckling rupture disc 68 can withstand a greater fluid pressure exerted on the concave side of the concave-convex portion 76 thereof than on the convex side therof. This allows the relief valve 12 to be periodically tested by applying fluid pressure within the internal portion of the nozzle 22 without rupturing the rupture disc 68 of the apparatus 1 0 and without disassembly of the pressure relief system or removal of the relief valve 12 from the system.
For this purpose, a passageway 100 is provided laterally through the flange portion 28 of the nozzle 22, and a conduit 102 is connected to the passageway 100 and to a port of a four-way valve
104 or other similar valving arrangement. A source of fluid pressure is connected to a port of the valve 104 by a conduit 106 and a pressure gauge 108 is connected to another port of the valve 104. A conduit 110 is connected to the fourth port of the valve 104 and to a vent. In testing the relief valve 12, the valve 104 is operated so that the fluid under pressure from conduit 106 flows into inlet nozzle 22, and the pressure observed on the pressure gauge 108 is increased until the valve closure means 26 opens.
Once the relief valve 12 has been tested and has been adjusted to open at the desired pressure
level is necessary, the valve means 104 is operated so that the fluid under pressure is vented from the relief valve 1 2 by way of the conduits
102 and 110.
As mentioned above, the annular flange
portion 62 of the support body 60 is formed of
minimum thickness whereby the installation of the apparatus 10 elevates the relief valve 12 with
respect to the inlet flange 14 as little as possible.
Claims (8)
1. An isolating apparatus for installation between the annular seating surface of the inlet nozzle of the fluid pressure relief valve and the corresponding surface of the inlet flange to which the relief valve and inlet nozzle are to be connected, said isolating apparatus including a support body having a cylindrical portion for extension into the interior of said inlet flange and a radially extending annular flat flange portion at one end of the cylindrical portion, and a rupturable member in the form of a reverse buckling rupture disk provided with scores, said rupture disk being seal welded to the other end of the cylindrical portion.
2. Apparatus according to Claim 1, wherein said rupture disk includes an annular flange portion connected to a concave-convex portion by an annular transition connection, said rupture disk being welded to said support bodyby means of said annular flange portion.
3. Apparatus according to Claim 1 or 2, wherein the end of a cylindrical shield for protecting said rupture disk is welded to said rupture disk on the face thereof remote from said cylindrical portion of said body.
4. Apparatus according to Claim 2 and Claim 3, wherein said cylindrical shield is welded to the annular flat portion of said rupture disk.
5. Apparatus according to Claim 3 or 4, wherein said cylindrical portion of said body and said cylindrical shield are of the same internal diameters and thicknesses.
6. Apparatus according to Claim 2 and Claim 5, wherein the diameter of said concave-convex portion of said rupture disk is equal to the internal diameters of said cylindrical portion of said body and said cylindrical shield.
7. Apparatus according to Claim 2, or any claim dependent thereon, wherein a flat ring is positioned between, and welded to, the end of said cylindrical portion of said body and said annular flat portion of said rupture disk, said ring extending into said cylindrical portion of said body interiorly of said transition connection of said rupture disc, whereby excessive tearing of said rupture disk upon reversal and rupture thereof is prevented.
8. An isolating apparatus for installation between the annular sealing surface of the inlet nozzle of a fluid pressure relief valve and the corresponding surface of the inlet flange to which the relief valve and inlet nozzle are to be connected, said isolating apparatus being substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93637178A | 1978-08-24 | 1978-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2028426A true GB2028426A (en) | 1980-03-05 |
| GB2028426B GB2028426B (en) | 1982-10-13 |
Family
ID=25468537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7926218A Expired GB2028426B (en) | 1978-08-24 | 1979-07-27 | Pressure relief valve apparatus |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5544184A (en) |
| AU (1) | AU5021079A (en) |
| BE (1) | BE878403A (en) |
| BR (1) | BR7905396A (en) |
| CA (1) | CA1127499A (en) |
| DE (1) | DE2934001A1 (en) |
| FR (1) | FR2434323A1 (en) |
| GB (1) | GB2028426B (en) |
| IT (1) | IT1122464B (en) |
| NL (1) | NL7906371A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549565A (en) * | 1984-03-05 | 1985-10-29 | Bs&B Safety Systems, Inc. | Reclosing rupture disk assembly |
| EP0430390A1 (en) * | 1989-11-27 | 1991-06-05 | BS & B SAFETY SYSTEMS, INC. | Failure indicating rupture disk assembly |
| WO2001077552A3 (en) * | 2000-04-07 | 2002-01-24 | Bs & B Safety Systems Inc | Combination pressure relief device |
| EP1225381A1 (en) * | 2001-01-22 | 2002-07-24 | Henry Technologies, Inc. | Safety valve and safety valve system |
| WO2012075588A1 (en) * | 2010-12-09 | 2012-06-14 | Car-Ber Investments Inc. | Apparatus and method for testing pressure relief valves |
| EP2565504A1 (en) * | 2011-09-02 | 2013-03-06 | Aurotec GmbH | Connector of a transport pipeline |
| US8496021B2 (en) | 2006-10-02 | 2013-07-30 | Airbus Operations Limited | Overpressure valve for an aircraft |
| CN106644242A (en) * | 2016-12-30 | 2017-05-10 | 西安航天动力研究所 | Diaphragm type pressure annunciator |
| WO2018142148A1 (en) * | 2017-02-03 | 2018-08-09 | Petainer Large Container Ip Limited | Keg closure with attached venting system |
| CN113418037A (en) * | 2021-06-29 | 2021-09-21 | 西安航天动力研究所 | Diaphragm assembly and safety device for space system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2941173C2 (en) * | 1979-10-11 | 1981-12-03 | Gustav F. Gerdts GmbH & Co KG, 2800 Bremen | Safety valve |
| CN102095006B (en) * | 2010-12-29 | 2012-07-25 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| WO2016174553A1 (en) * | 2015-04-28 | 2016-11-03 | Donadon Safety Discs And Decives S.R.L. | Method for making a safety or rupture element |
| US10385983B2 (en) | 2017-09-27 | 2019-08-20 | Accu-Glass Products, Inc. | Burst disk assembly for high and ultra high vacuum containment vessels |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE401499A (en) * | ||||
| US2098399A (en) * | 1935-12-04 | 1937-11-09 | Mathieson Alkali Works Inc | Chemical manufacture |
| US3484817A (en) * | 1967-11-07 | 1969-12-16 | Black Swalls & Bryson Inc | Safety pressure relief device |
| US3872875A (en) * | 1970-11-23 | 1975-03-25 | Jr John H Raidl | Relief valve isolating means |
| US3906977A (en) * | 1970-11-30 | 1975-09-23 | Black Sivalls & Bryson Inc | Reverse acting safety relief device |
-
1979
- 1979-07-27 GB GB7926218A patent/GB2028426B/en not_active Expired
- 1979-08-09 IT IT25038/79A patent/IT1122464B/en active
- 1979-08-17 FR FR7921312A patent/FR2434323A1/en active Granted
- 1979-08-22 DE DE19792934001 patent/DE2934001A1/en not_active Ceased
- 1979-08-22 BR BR7905396A patent/BR7905396A/en unknown
- 1979-08-23 CA CA334,375A patent/CA1127499A/en not_active Expired
- 1979-08-23 NL NL7906371A patent/NL7906371A/en not_active Application Discontinuation
- 1979-08-23 AU AU50210/79A patent/AU5021079A/en not_active Abandoned
- 1979-08-23 BE BE0/196860A patent/BE878403A/en not_active IP Right Cessation
- 1979-08-24 JP JP10803479A patent/JPS5544184A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4549565A (en) * | 1984-03-05 | 1985-10-29 | Bs&B Safety Systems, Inc. | Reclosing rupture disk assembly |
| EP0430390A1 (en) * | 1989-11-27 | 1991-06-05 | BS & B SAFETY SYSTEMS, INC. | Failure indicating rupture disk assembly |
| WO2001077552A3 (en) * | 2000-04-07 | 2002-01-24 | Bs & B Safety Systems Inc | Combination pressure relief device |
| US6431196B1 (en) | 2000-04-07 | 2002-08-13 | Bs&B Safety Systems, Inc. | Combination pressure relief device |
| EP1225381A1 (en) * | 2001-01-22 | 2002-07-24 | Henry Technologies, Inc. | Safety valve and safety valve system |
| US8496021B2 (en) | 2006-10-02 | 2013-07-30 | Airbus Operations Limited | Overpressure valve for an aircraft |
| WO2012075588A1 (en) * | 2010-12-09 | 2012-06-14 | Car-Ber Investments Inc. | Apparatus and method for testing pressure relief valves |
| CN103998839A (en) * | 2011-09-02 | 2014-08-20 | 奥若泰克股份有限公司 | Connecting piece of a transport line |
| WO2013030405A3 (en) * | 2011-09-02 | 2013-05-23 | Aurotec Gmbh | Connecting piece of a transport line |
| WO2013030405A2 (en) | 2011-09-02 | 2013-03-07 | Aurotec Gmbh | Connecting piece of a transport line |
| EP2565504A1 (en) * | 2011-09-02 | 2013-03-06 | Aurotec GmbH | Connector of a transport pipeline |
| RU2606734C2 (en) * | 2011-09-02 | 2017-01-10 | Ауротек Гмбх | Transport pipeline connector |
| TWI579477B (en) * | 2011-09-02 | 2017-04-21 | Aurotec Gmbh | Transmission line's connector |
| CN106644242A (en) * | 2016-12-30 | 2017-05-10 | 西安航天动力研究所 | Diaphragm type pressure annunciator |
| WO2018142148A1 (en) * | 2017-02-03 | 2018-08-09 | Petainer Large Container Ip Limited | Keg closure with attached venting system |
| CN110494385A (en) * | 2017-02-03 | 2019-11-22 | 普坦内大容器Ip有限公司 | The bucket closure member of aerating system with attachment |
| US11053111B2 (en) | 2017-02-03 | 2021-07-06 | Petainer Large Container Ip Limited | Keg closure with integrated venting system |
| US11066289B2 (en) | 2017-02-03 | 2021-07-20 | Petainer Large Container Ip Limited | Keg closure with attached venting system |
| CN110494385B (en) * | 2017-02-03 | 2021-11-23 | 普坦内大容器Ip有限公司 | Bucket closure with attached venting system |
| US11465894B2 (en) | 2017-02-03 | 2022-10-11 | Petainer Large Container Ip Limited | Keg closure housing with integrally formed features |
| CN113418037A (en) * | 2021-06-29 | 2021-09-21 | 西安航天动力研究所 | Diaphragm assembly and safety device for space system |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7906371A (en) | 1980-02-26 |
| FR2434323B1 (en) | 1983-03-18 |
| BR7905396A (en) | 1980-05-20 |
| DE2934001A1 (en) | 1980-03-06 |
| AU5021079A (en) | 1980-02-28 |
| IT1122464B (en) | 1986-04-23 |
| FR2434323A1 (en) | 1980-03-21 |
| IT7925038A0 (en) | 1979-08-09 |
| GB2028426B (en) | 1982-10-13 |
| JPS5544184A (en) | 1980-03-28 |
| CA1127499A (en) | 1982-07-13 |
| BE878403A (en) | 1979-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980727 |