US2743036A - Safety devices for compressed gas containers - Google Patents

Safety devices for compressed gas containers Download PDF

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US2743036A
US2743036A US290389A US29038952A US2743036A US 2743036 A US2743036 A US 2743036A US 290389 A US290389 A US 290389A US 29038952 A US29038952 A US 29038952A US 2743036 A US2743036 A US 2743036A
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gas
disc
bursting
compressed gas
skeleton
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US290389A
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Wachtell Richard
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American Electro Metal Corp
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American Electro Metal Corp
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    • 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
    • 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
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0311—Closure means
    • F17C2205/0314—Closure means breakable, e.g. with burst discs
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/011—Oxygen
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC

Definitions

  • This invention relates to safety devices for compressed gas containers, and more particularly to safety devices known as frangible disc safety devices.
  • a safety device consisting of a thin copper disc inserted in a specially designed nut attached to a fitting on the valve stem on the upper portion of the gas cylinder.
  • the physical dimensions of the copper disc are chosen so that it will fracture or burst at a specified pressure thereby permitting the confined gas to escape and avoiding the dangerous possibility of the increased gas pressure fracturing the walls of the container and propelling it through the air.
  • the copper material is subject to conditions of creep under the continually applied load of the compressed gas, it is backed up by a low temperature fusible alloy'; the theory being that only heat might cause an increase in the pressure of the gas Within the cylinder, and that under conditions of heat, the fusible alloy would melt permitting the copper disc to expand back into the rupture chamber and fracture.
  • Low pressure gas cylinders such as those containing acetylene gas, merely have fusible metal plugs which melt under conditions of heat, it being impossible to manufacture and handle the thin bursting discs necessary for fracturing under such low pressures.
  • the present invention overcomes these difiiculties by providing a frangible disc safety device having a creepresistant bursting disc which eliminates the needfor a fusible alloy backing and in addition provides for the slow rather than the explosive escape of gas through the bursting disc, since the danger of fire due to the escaping gases is materially reduced under these circumstances.
  • a bursting disc consisting of a substantially strong creep-resistant porous matrix or skeleton of alloy steel, tungsten carbide, bronze, beta brass or any other suitable strong material is produced and thereafter its pores are completely filled with a low-temperature fusible material.
  • the skeleton provides the strength and resistance to creep desired in the bursting disc, while the fusible alloy filling its pores provides the gas seal.
  • failure will occur either through over-pressure (by bursting of the disc in the normal manner), or in the event of local heating bymelting out of the fusible alloy with consequent loss of the gas through the now porous bursting disc.
  • One object of the invention is to provide a safety device for compressed gas containers having a creep-resistant bursting disc, and a method for making such a bursting disc.
  • Another object of the invention is to provide a safety device for compressed gas containers which will permit the slow escape rather than the explosive escape of gas upon failure of the safety device.
  • a further object of the invention is a method for manufacturing such safety devices on a production basis using unskilled labor.
  • Fig. 1 is an elevational view of the upper part of a compressed gas container containing the safety device of the invention
  • Fig. 2 is a cross-sectional view of a frangible disc safety device containing one form of a bursting disc of the invention.
  • Fig. 3 is a photomicrograph (X200) of the structure of the bursting disc shown in Fig. 2.
  • the safety device 10 is attached to the valve stem of the gas cylinder 11 by a hollow laterally extending pipe extension 12, just prior to the outlet control valve 13.
  • the safety device 10 contains a bursting disc 15 held in its operative position generally perpendicular to the longitudinal axis of the pipe extension 12 by a back-up nut 16.
  • the back-up nut 16 comprises an inside threaded cupouter end ofthe hollow pipe extension 12 and an inner facing shoulder 17 of the back-up nut 16 to provide a barrier through which the compressed gas in the hollow pipe extension 12 cannot flow.
  • a circular washer 18, of fiber for instance, having a center opening is interposed between the facing surfaces of the pipe extension 12 and the bursting disc 15 to prevent any gas leakage through the threaded contact surface portions of the back-up nut 16 and thepipe extension 12.
  • the bursting disc 15 When the pressure of the gas Within the pipe extension 12 exceeds a specified amount, the bursting disc 15 will expand back into a rupture chamber 19 and fracture. The gas will flow past the fractured bursting disc 15, through the rupture chamber 19 and out through a blow out hole 29, inthe rear of the back-up nut 16. p
  • the bursting disc 15 comprises a substantially'strong-rigid-porous skeleton having its pores filled with a low temperature fusible'alloy.
  • the skeleton material can be any suitable strong material that will not creep under the normal working pressures of the compressed gas, such as alloy steel, tungsten-carbide, bronze and other like strong materials.
  • the fusible alloy may be any metal or alloy that will melt at low temperatures of the order of about ISO-250 F. Woods metal, an alloy of bismuth, lead, tin and cadmium, is very satisfactory as the fusible alloy.
  • a desirable method for producing the bursting disc 15 in accordance with the invention is by using powdered metallurgical techniques.
  • the bronze metal may be pulverized or disintegrated to form suitable sized powder particles.
  • the powder particles are then compacted and heated at an elevated temperature in a mold having the desired shape of the bursting disc 15 so as to form a substantially strong rigid porous structure. Thereafter, the soproduced porous structure is infiltrated with the low temperature fusible alloy.
  • FIG. 3 shows a-photomicrograph (X200) of the structure .obtainedin .a cemented bronze powder particle porous structure infiltrated with Woods metal.
  • the cross-hatched large oval particles 25 are the bronze particles; ithe .ribbon like structure 26 abutting the bronze particles is a tin-rich layer which normally exists onthe surface of the bronze as manufactured; the-dotted:intergranular phase 27 is the eutectic of'the fusible alloy.
  • the bronze metal . is disintegrated or pulverizedby ballmilling or other like disintegrating :processes into fine powder particles of suitable size. Thereafter the bronze powder particles :are formed into -'the* desired shape f the "bursting disc by compacting -in a -mold having a cavity contour conforming to thedesired shape.
  • the compacted particles are then heated at an elevated temperature so as to give-the compactedbody the desired physical strength and rigidness and to form a porous matrix.
  • the bronze powder particles may be loosely packed in .a mold and thereafter sinter'ed while still in the mold in a protective atmosphere (such as'partially combusted natural gas or producer gas) at aitemperature of the order of 800 C.
  • Bronze powders'sinter easily and need not be prepressed'but other powders may be green pressed, i. e., pressed before sintering.
  • the porosity of the cemented bronze powder body be controlled within extremely close-limits in order that each unit he identical in physical properties to the preceding unit so that each safety device will fail or fracture at the same proper bursting pressure.
  • the completed porous matrix or skeleton is then'ready for infiltration.
  • the porous matrix .or skeleton must be completely infiltrated by the low temperature fusible alloy else the .gas will :gradually leak through the bursting disc. Because of the low. melting point of the fusible alloys, infiltration must be carried out at temperatures of the order between about 200 F. and about300 F. This is a region in which hydrogen no longer actsas a reducing agent or flux for any oxides that will have formed in the :porous skeleton.
  • liquid fluxes such as hydrochloric acid plus alcohol or liquid soldering flux, or other like liquid fluxes.
  • the technique employed in infiltrating the bronze porous matrix or skeleton is to first impregnate the skeleton body with the liquid flux as by immersing the body in the liquid flux. Thereafter, the impregnated skeleton body is slowly immersed in -a pool of *the various other. modifications and applications of the same.
  • a safety relief device for gases under pressure the combination 'of a tank having a discharge duct :and a safetybursting disk providing a sealing closure for said duct, saicllbursting disk comprising .a porous skeleton body of cemented metal particles to provide a strong creep resistant body, the pores of said skeleton body being filled with a readily fusible material which melts at temperatures above normal to permitgas'toescape through said pores.
  • a safety relief device for gases under pressure the combination of a tank having a discharge 'duct and a safety'bursting disk providing a sealing closure for said duct, said bursting disk comprising a porous skeleton body of cemented metal particles to provide a strong -creep resistant body, the pores of said skeleton body being filled with a readily fusible materialwhich melts at about approximately to 250 F. to' perrnit gas to escape through said pores when the melting point of saidfilling material is exceeded.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

April 24, 1956 R. WACHTELL SAFETY DEVICES FOR COMPRESSED GAS CONTAINERS Filed May 28, 1952 CYLINDER n my I 5.
IN V EN TOR. 160/042 ll/mzwrsu.
ATrQeA sys United States Patent SAFETY DEVICES FOR COMPRESSED GAS CONTAINERS Richard Wachtell, Mamaroneck, N. Y., assignor to American Electro Metal Corporation, Yonkers, N. Y., a corporation of Maryland Application May 28, 1952, Serial No. 290,389
7 Claims. (Cl. 220-89) This invention relates to safety devices for compressed gas containers, and more particularly to safety devices known as frangible disc safety devices.
Generally, two types of safety devices are used on compressed gascontainers depending upon the amount of gas pressure within the container. High pressure gas containers, such as those containing oxygen, use a safety device consisting of a thin copper disc inserted in a specially designed nut attached to a fitting on the valve stem on the upper portion of the gas cylinder. The physical dimensions of the copper disc are chosen so that it will fracture or burst at a specified pressure thereby permitting the confined gas to escape and avoiding the dangerous possibility of the increased gas pressure fracturing the walls of the container and propelling it through the air. Because the copper material is subject to conditions of creep under the continually applied load of the compressed gas, it is backed up by a low temperature fusible alloy'; the theory being that only heat might cause an increase in the pressure of the gas Within the cylinder, and that under conditions of heat, the fusible alloy would melt permitting the copper disc to expand back into the rupture chamber and fracture.
Low pressure gas cylinders such as those containing acetylene gas, merely have fusible metal plugs which melt under conditions of heat, it being impossible to manufacture and handle the thin bursting discs necessary for fracturing under such low pressures.
One of the main disadvantages of these safety devices is that local heating at the base or at the sides of the gas container would not melt the fusiblealloy although the gas pressure in the cylinder rises high enough to burst it. Another disadvantage is that the fusible alloy is itself subject to creep under the continually applied load of the compressed gas. i
The present invention overcomes these difiiculties by providing a frangible disc safety device having a creepresistant bursting disc which eliminates the needfor a fusible alloy backing and in addition provides for the slow rather than the explosive escape of gas through the bursting disc, since the danger of fire due to the escaping gases is materially reduced under these circumstances.
In accordance with the invention, a bursting disc consisting of a substantially strong creep-resistant porous matrix or skeleton of alloy steel, tungsten carbide, bronze, beta brass or any other suitable strong material is produced and thereafter its pores are completely filled with a low-temperature fusible material. With such a construction, the skeleton provides the strength and resistance to creep desired in the bursting disc, while the fusible alloy filling its pores provides the gas seal. With a disc of such design, failure will occur either through over-pressure (by bursting of the disc in the normal manner), or in the event of local heating bymelting out of the fusible alloy with consequent loss of the gas through the now porous bursting disc.
One object of the invention is to provide a safety device for compressed gas containers having a creep-resistant bursting disc, and a method for making such a bursting disc.
Another object of the invention is to provide a safety device for compressed gas containers which will permit the slow escape rather than the explosive escape of gas upon failure of the safety device.
A further object of the invention is a method for manufacturing such safety devices on a production basis using unskilled labor.
The foregoing and other objects of the invention will be best understood from the following detailed description of exemplifications thereof, reference being had to the accompanying drawings, wherein:
Fig. 1 is an elevational view of the upper part of a compressed gas container containing the safety device of the invention; g
Fig. 2 is a cross-sectional view of a frangible disc safety device containing one form of a bursting disc of the invention; and
' Fig. 3 is a photomicrograph (X200) of the structure of the bursting disc shown in Fig. 2.
Referring to Fig. 2, in the specific form shown, the safety device 10 is attached to the valve stem of the gas cylinder 11 by a hollow laterally extending pipe extension 12, just prior to the outlet control valve 13. The safety device 10 contains a bursting disc 15 held in its operative position generally perpendicular to the longitudinal axis of the pipe extension 12 by a back-up nut 16.
' 'The back-up nut 16 comprises an inside threaded cupouter end ofthe hollow pipe extension 12 and an inner facing shoulder 17 of the back-up nut 16 to provide a barrier through which the compressed gas in the hollow pipe extension 12 cannot flow. A circular washer 18, of fiber for instance, having a center opening is interposed between the facing surfaces of the pipe extension 12 and the bursting disc 15 to prevent any gas leakage through the threaded contact surface portions of the back-up nut 16 and thepipe extension 12.
When the pressure of the gas Within the pipe extension 12 exceeds a specified amount, the bursting disc 15 will expand back into a rupture chamber 19 and fracture. The gas will flow past the fractured bursting disc 15, through the rupture chamber 19 and out through a blow out hole 29, inthe rear of the back-up nut 16. p
In the form shown the bursting disc 15 comprises a substantially'strong-rigid-porous skeleton having its pores filled with a low temperature fusible'alloy. The skeleton material can be any suitable strong material that will not creep under the normal working pressures of the compressed gas, such as alloy steel, tungsten-carbide, bronze and other like strong materials. The fusible alloy may be any metal or alloy that will melt at low temperatures of the order of about ISO-250 F. Woods metal, an alloy of bismuth, lead, tin and cadmium, is very satisfactory as the fusible alloy.
There will now be described one practical way of making a bursting disc in accordance with the principles of the invention using bronze as the skeleton material and Woods metal as the easily fusible alloy.
A desirable method for producing the bursting disc 15 in accordance with the invention is by using powdered metallurgical techniques.
In general, the bronze metal may be pulverized or disintegrated to form suitable sized powder particles. The powder particles are then compacted and heated at an elevated temperature in a mold having the desired shape of the bursting disc 15 so as to form a substantially strong rigid porous structure. Thereafter, the soproduced porous structure is infiltrated with the low temperature fusible alloy.
*Fig. 3 shows a-photomicrograph (X200) of the structure .obtainedin .a cemented bronze powder particle porous structure infiltrated with Woods metal. The cross-hatched large oval particles 25 are the bronze particles; ithe .ribbon like structure 26 abutting the bronze particles is a tin-rich layer which normally exists onthe surface of the bronze as manufactured; the-dotted:intergranular phase 27 is the eutectic of'the fusible alloy.
1n ordertozenable those skilled in the art-to readily practice the invention .but without limiting the scope thereof, I will now .givea moredetailed description of a practical method for forming the bursting'disc in accordance with the invention.
The bronze metal .is disintegrated or pulverizedby ballmilling or other like disintegrating :processes into fine powder particles of suitable size. Thereafter the bronze powder particles :are formed into -'the* desired shape f the "bursting disc by compacting -in a -mold having a cavity contour conforming to thedesired shape.
The compacted particles are then heated at an elevated temperature so as to give-the compactedbody the desired physical strength and rigidness and to form a porous matrix. The bronze powder particles may be loosely packed in .a mold and thereafter sinter'ed while still in the mold in a protective atmosphere (such as'partially combusted natural gas or producer gas) at aitemperature of the order of 800 C. Bronze powders'sinter easily and need not be prepressed'but other powders may be green pressed, i. e., pressed before sintering.
In order to manufacture the safety device in accordancewith the invention on aproduction'basispit is necessary that the porosity of the cemented bronze powder body be controlled within extremely close-limits in order that each unit he identical in physical properties to the preceding unit so that each safety device will fail or fracture at the same proper bursting pressure.
To this end it has been found to be advantageousto employ spherical powders in forming the bursting disc, since thegeometry of the stacking of the spherical .powders will give good reproducible results.
The completed porous matrix or skeleton is then'ready for infiltration. The porous matrix .or skeleton must be completely infiltrated by the low temperature fusible alloy else the .gas will :gradually leak through the bursting disc. Because of the low. melting point of the fusible alloys, infiltration must be carried out at temperatures of the order between about 200 F. and about300 F. This is a region in which hydrogen no longer actsas a reducing agent or flux for any oxides that will have formed in the :porous skeleton.
In order to reduce any oxides that may have formed within the porous skeleton so that complete infiltration will result, it has been found desirable to employ liquid fluxes, such as hydrochloric acid plus alcohol or liquid soldering flux, or other like liquid fluxes.
The technique employed in infiltrating the bronze porous matrix or skeleton is to first impregnate the skeleton body with the liquid flux as by immersing the body in the liquid flux. Thereafter, the impregnated skeleton body is slowly immersed in -a pool of *the various other. modifications and applications of the same.
It is accordingly desired that in construing the breadth of the approved claims they shall not be limited to the specific exemplifications of the invention described herein.
Iclaim:
1. In a safety relief device for gases under pressure, the combination 'of a tank having a discharge duct :and a safetybursting disk providing a sealing closure for said duct, saicllbursting disk comprising .a porous skeleton body of cemented metal particles to provide a strong creep resistant body, the pores of said skeleton body being filled with a readily fusible material which melts at temperatures above normal to permitgas'toescape through said pores.
'2. ln a safety relief device for gases under pressure, the combination of a tank having a discharge 'duct and a safety'bursting disk providing a sealing closure for said duct, said bursting disk comprising a porous skeleton body of cemented metal particles to provide a strong -creep resistant body, the pores of said skeleton body being filled with a readily fusible materialwhich melts at about approximately to 250 F. to' perrnit gas to escape through said pores when the melting point of saidfilling material is exceeded.
'3. Thedevice as set forth in claim 2 in which said skeleton body consists essentially of alloy steel.
'4. The device as set forth in claim 2 in which said skeleton body consists essentially of tungsten carbide.
5. The device as set forth in claim 2 in which said skeleton body consists essentially ofbronze.
6. The device as set'forth in claim 2 in which said skeletonbody is made .up of cemented particles which are substantially spherical in shape.
7. The device as set forth in claim 2 in' which the material ofsaidpores consists essentially of Woods metal.
References Cited in the file of this patent UNITED STATES PATENTS 1,068,675 Lightfoot July 29, 1913 1,598,382 McNutt Aug. 31, 1926 2,096,252 Koehring Oct. 19, 1937 2,190,237 Koehring Feb. 13, 1940 2,198,254 Koehring Apr. 23, 1940 2,273,589 Olt Feb. 17, 1942 2,518,253 Reis Aug. 8, 1950 2,518,746 Blohmet al Aug. 15, 1950 2,580,426 :I-Ieigis Jan. 1, 1952

Claims (1)

1. IN A SAFETY RELIEF DEVICE FOR GASES UNDER PRESSURE, THE COMBINATION OF A TANK HAVING A DISCHARGE DUCT AND A SAFETY BURSTING DISK PROVIDING A SEALING CLOSURE FOR SAID DUCT, SAID BURSTING DISK COMPRISING A POROUS SKELETON BODY OF CEMENTED METAL PARTICLES TO PROVIDE A STRONG CREEP RESISTANT BODY, THE PORES OF SAID SKELETON BODY BEING FILLED WITH A READILY FUSIBLE MATERIAL WHICH MELTS AT TEMPERATURES ABOVE NORMAL TO PERMIT GAS TO ESCAPE THROUGH SAID PORES.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450305A (en) * 1966-10-12 1969-06-17 Continental Can Co Venting means for containers
FR2461888A1 (en) * 1979-07-18 1981-02-06 Nippon Tansan Gas Cy Ltd Safety pressure gas container - has machined cone in one end or cap of container to reduce thickness of container at one point
US4688694A (en) * 1986-01-16 1987-08-25 Amtrol Inc. Safety means for pressurized gas containers
US4744382A (en) * 1987-04-29 1988-05-17 Aluminum Company Of America Combination thermal or pressure activated relief valve
US20030221720A1 (en) * 2002-04-23 2003-12-04 Erick Girouard Pressure relief device
US6814097B2 (en) 2001-03-20 2004-11-09 Teleflex Gfi Control Systems L.P. Pressure relief device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1068675A (en) * 1912-10-12 1913-07-29 Linde Air Prod Co Safety relief device for gases under pressure.
US1598382A (en) * 1924-12-03 1926-08-31 William H Mcnutt Safety closure for containers
US2096252A (en) * 1934-02-19 1937-10-19 Gen Motors Corp Method of making a bearing material
US2190237A (en) * 1937-12-30 1940-02-13 Gen Motors Corp Method of making a composite metal structure
US2198254A (en) * 1936-08-07 1940-04-23 Gen Motors Corp Method of making composite metal structures
US2273589A (en) * 1940-03-07 1942-02-17 Gen Motors Corp Method of making porous metal bodies
US2518253A (en) * 1949-04-14 1950-08-08 American Measuring Instr Corp Metallic sealing ring
US2518746A (en) * 1948-06-14 1950-08-15 Fluor Corp Bubble cap
US2580426A (en) * 1949-11-16 1952-01-01 Specialties Dev Corp Warning means for safety discharge outlets

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1068675A (en) * 1912-10-12 1913-07-29 Linde Air Prod Co Safety relief device for gases under pressure.
US1598382A (en) * 1924-12-03 1926-08-31 William H Mcnutt Safety closure for containers
US2096252A (en) * 1934-02-19 1937-10-19 Gen Motors Corp Method of making a bearing material
US2198254A (en) * 1936-08-07 1940-04-23 Gen Motors Corp Method of making composite metal structures
US2190237A (en) * 1937-12-30 1940-02-13 Gen Motors Corp Method of making a composite metal structure
US2273589A (en) * 1940-03-07 1942-02-17 Gen Motors Corp Method of making porous metal bodies
US2518746A (en) * 1948-06-14 1950-08-15 Fluor Corp Bubble cap
US2518253A (en) * 1949-04-14 1950-08-08 American Measuring Instr Corp Metallic sealing ring
US2580426A (en) * 1949-11-16 1952-01-01 Specialties Dev Corp Warning means for safety discharge outlets

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450305A (en) * 1966-10-12 1969-06-17 Continental Can Co Venting means for containers
FR2461888A1 (en) * 1979-07-18 1981-02-06 Nippon Tansan Gas Cy Ltd Safety pressure gas container - has machined cone in one end or cap of container to reduce thickness of container at one point
US4688694A (en) * 1986-01-16 1987-08-25 Amtrol Inc. Safety means for pressurized gas containers
US4744382A (en) * 1987-04-29 1988-05-17 Aluminum Company Of America Combination thermal or pressure activated relief valve
US6814097B2 (en) 2001-03-20 2004-11-09 Teleflex Gfi Control Systems L.P. Pressure relief device
US20030221720A1 (en) * 2002-04-23 2003-12-04 Erick Girouard Pressure relief device
US6851445B2 (en) 2002-04-23 2005-02-08 Teleflex Gfi Control Systems L.P. Pressure relief device

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