US2580426A - Warning means for safety discharge outlets - Google Patents

Warning means for safety discharge outlets Download PDF

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Publication number
US2580426A
US2580426A US127635A US12763549A US2580426A US 2580426 A US2580426 A US 2580426A US 127635 A US127635 A US 127635A US 12763549 A US12763549 A US 12763549A US 2580426 A US2580426 A US 2580426A
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Prior art keywords
disc
seat
safety
opening
pressure
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Expired - Lifetime
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US127635A
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Henry E Heigis
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Specialties Development Corp
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Specialties Development Corp
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Priority to US127635A priority Critical patent/US2580426A/en
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1624—Destructible or deformable element controlled
    • Y10T137/1632—Destructible element
    • Y10T137/1684—With alarm or indicator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1624—Destructible or deformable element controlled
    • Y10T137/1632—Destructible element
    • Y10T137/1692—Rupture disc
    • Y10T137/1714—Direct pressure causes disc to burst
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8326—Fluid pressure responsive indicator, recorder or alarm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/4979—Breaking through weakened portion

Definitions

  • Metallic'receptacles such as cylinders and the lill/ge for storing.normalllgaseous material in quen'ed s condition underV y relatively ty dischargeffmeans l' including al ldisc b ⁇ hen, the pressure ⁇ within the ⁇ a. ⁇ ...saf..value.
  • ⁇ con Vins(pressure ⁇ mediurn'when an' attempt is i strated in United States Patent" generally comprises a sarety
  • the @regoing objects may be accomplished by providing safety'disoharge outletA means ⁇ formed withV an ⁇ ⁇ openingfand a seat surrounding the opening a safety disc on thexseat' for closing the opening;
  • Figure 1 is ⁇ an elevational view,- partly in sectin, 'of'fa valve,illus'trating oneembodiment of thefjnvention. '4
  • Fig-nre 2- is a similar view; illustrating another Referring tofthe drawing, and; more particularly; tol Figure 1J thereof; 'there isf shovvnY a valve I,..by way of:V exampleyforal container Ilor the like (shown in broken lines) adapted. ⁇ for stor- ⁇ ing fluidmedium.underpressure.
  • the nipple I6 is exteriorly threaded at i9 and is formed with an axially extending bore or opening 20 surrounded by an annular surface 2l serving as a seat for a safety discharge disc 22 adapted to close the opening 20.
  • the seat includes a gasket or Washer 24 adapted to provide a fluid pressure tight seal between the surface 2
  • the disc 22 is held on its seat by a retainer member 25 herein shown as a cap-like structure comprising an end wall 26, an interiorly threaded skirt 2l removably secured over the nipple I6, an annular internal shoulder 29 for holding the disc on its seat, and conventional radial ports 30 for releasing pressure medium from the cylinder and minimizing recoil or lateral reaction of the cylinder in the event the safety disc bursts.
  • a retainer member 25 herein shown as a cap-like structure comprising an end wall 26, an interiorly threaded skirt 2l removably secured over the nipple I6, an annular internal shoulder 29 for holding the disc on its seat, and conventional radial ports 30 for releasing pressure medium from the cylinder and minimizing recoil or lateral reaction of the cylinder in the event the safety disc bursts.
  • the member 25 is formed with a passageway extending from the seat to the atmosphere, that is, to the exterior of the member 25.
  • This passageway includes one or more apertures 3l (one being shown by way of example) extending radially outwardly through the skirt 2l from a point adjacent the seat or between the seat and the shoulder 29 to the exterior, whereby, when the retainer member 25 is unscrewed slightly, pressure medium confined by the disc 22 is adapted to escape through the aperture to produce an audible warning.
  • FIG 2 a valve is shown which is similar to the valve l shown in Figure 1, except that the safety discharge means are in accordance with another embodiment of the invention.
  • the safety discharge means includes a spud 34 formed on the valve body l2.
  • the spud has an interiorly threaded bore 35 and an annular shoulder 33 within the bore which, together with a gasket or Washer 24, provides a seat for a safety disc 22 adapted to be held thereon by a retainer member 36.
  • the retainer member 36 is in the form of a. hollow plug-like structure comprising an end wall 31, an outer flange-like section 39 formed with a plurality of radial recoil minimizing ports 40, and an inner threadedsection 4I screwed into the bore of the spud and having an annular inner end surface 42 for engaging the disc 22 to hold the same on its seat.
  • the warning means in this embodiment of the invention are provided by a passageway extending from the seat to the exterior of the spud which includes one or more apertures 44 extending radially outwardly through the wall of the spud from the bore thereof at a point adjacent for closing said opening, and means removably ⁇ secured to said outlet means for normally retain-"l the seat from the disc 22 to the exterior of the spud.
  • the present invention provides a simple, practical and eiective warning means for safety discharge outlets associated with valves, control heads, fittings and the like.
  • the warning means can be provided without material increase in cost of the devices to which they are applied, simply by the formation of an aperture 3
  • the combination of safety discharge outlet means having a tubular section formed withA an opening and a seat surrounding said ⁇ openi'ng, a safety disc on said seat for closing said opening,
  • the combination 'of safety felicitirse-Buti let means including a nipple formed with an opening and a seat surrounding said opening, a safety disc on said seat for closing said opening, and a cap-like structure removably secured over said nipple for normally retaining said disc on said seat to form a pressure-tight seal, said structure having an aperture extending outwardly therethrough from a point adjacent said seat to the exterior thereof for permitting uid medium conned by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure while pressure medium is confined by said disc whereby the seal is broken.
  • safety discharge outlet means including a tubular nipple formed with an opening and a seat surrounding said opening, a safety disc on said seat for closing said opening, and a cap-like structure having a tubular section removably secured over said nipple and having a surface at the interior thereof for normally retaining said disc on said seat to form a pressuretight seal, said tubular section having an aperture extending radially outwardly therethrough from a point between said surface and said seat to the exterior thereof for permitting fluid medium conned by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure While pressure medium is conned by said disc whereby the seal is broken.
  • safety discharge outlet means including a Spud formedwith a threaded opening and a seat within said opening, a safety disc on said seat for closing said opening, and a plug-like structure removably secured in said opening and normally retaining said disc on said seat to form a pressure-tight seal, said Spud having an aperture extending radially outwardly therethrough from a point adjacent said seat to the exterior thereof for permitting fluid medium confined by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure while pressure f medium is confined by said disc whereby lthe seal is broken.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Description

Jan. 1, 1952 HE, HE1G|S 2,580,426
WARNING MEANS FOR SAFETY DISCHARGE OUTLETS Filed NOV. 16, 1949 N l INVENTOR.
w TTORNEY vPatented Jan. 1, 1952 cialties'"Development Cor'poi'ati'on,' Belleville,
f f NQ'JQ ai corporation offNevv' Jersey .enplietion.Nvvember--la 194.9.. .Serial-Nmlis l resent inver;M0114A relates. w valves. and i mediuni`-under pressurel and, tolwarning means. for safety associated `with slichyalves, and
' nienke." 1. 5
Metallic'receptacles, such as cylinders and the lill/ge for storing.normalllgaseous material in quen'ed s condition underV y relatively ty dischargeffmeans l' including al ldisc b` hen, the pressure` within the `a.`...saf..value. such Van arnn'g communicationwitli the irl--A nder' and surrounded `by assai,` .he seat fnrwlrisine` the. opening., `screwthreadedly secured to the` berA isfQrnied vvithrradially extending ar epassagesifor releasing the press-` fthecylinder in the event the safety disc whereby lthe member, when dis,- the; valve body, may .be4 projected r and may cause personal injuryor In addition.Y when the pressuddenly released dueto removal disc 'retainenj the cylinder recoils ay lbe converted into a.A jet-like pro.-
` con Vins(pressure`mediurn'when an' attempt is i strated in United States Patent" generally comprises a sarety;
,d for retaining'tne dise on the sean 1 vr nl the cylinder and minimizing,
'et'. of; vthe,dimculties heretofore encountered ifeguentlyf attempts are made to remove.Y xnernpei;ndiileithe cylinder contains.
sacefvvitli great force by pressure'withdimewersinsseimeiaedriseesrsm tainerA meansmay` be; `1n the form of a, cap-like` lemloodimentnof `the invention.
vleims- (CL 11G-.10)
familiar withthe dangers involved that a: cylinder contains pressure 'medium and which; likewise` serve to. frighten persons tamlgieringA with the safetyfdischarg'e means into abandoning removal ofthe retainerand r'eapplying the4 same.
Other andi furtherl objects of4 the invention willlbe obvious upon anA understanding 0f. the. illustrative embodiment about. to be. describedy or Will'be indicated injthe yappended claims,v`and various advantages not]` referred to herein will ,occur to one skilled in, the art upon: employment of'ftlie inventionin practice.
In accordance with` the invention, the @regoing objectsmay be accomplished by providing safety'disoharge outletA means` formed withV an` `openingfand a seat surrounding the opening a safety disc on thexseat' for closing the opening;
and means removably secured to the outlet means for` retaining the disc on the seat, .onefof the means having passageway extending from the seat tofthe exterior thereof` for4v permitting fljuidj Amedium connedjby the ,disc' to escape therethrough and to serve as a. warning vent whenan attempt is made to remove the'retainer means while pressure medium is confined by thedisc.
In` one embodiment of the inventorn the` re,`
memberhaving a"ski1t"whi ch`v is formed jwitl the` passageway; andA is securedy over" a. discharge out.-
let nipple., i
AInfanotgherhembodiment of the inventlom the likegr'nember' secured Within a safety discharge outlet spud vvhiclr` is formed" `.with the passage- Way; 4 Y,
In Vthe drawing:
Figure 1 is` an elevational view,- partly in sectin, 'of'fa valve,illus'trating oneembodiment of thefjnvention. '4
Fig-nre 2- is a similar view; illustrating another Referring tofthe drawing, and; more particularly; tol Figure 1J thereof; 'there isf shovvnY a valve I,..by way of:V exampleyforal container Ilor the like (shown in broken lines) adapted.` for stor- `ing fluidmedium.underpressure. The valve generailyzcomprises;agbody I2 formed with an inlet I4 secured to;I theucontainenen outlet .151 and a;
stese-.the nietmaounauwmen n mnsuombecause it is not deemed essential-in understanding the present invention; and means, such as a hand wheel l1, for operating elements of the internal structure to control the release of uid medium from the container.
The nipple I6 is exteriorly threaded at i9 and is formed with an axially extending bore or opening 20 surrounded by an annular surface 2l serving as a seat for a safety discharge disc 22 adapted to close the opening 20. Preferably, the seat includes a gasket or Washer 24 adapted to provide a fluid pressure tight seal between the surface 2| and the disc 22.
The disc 22 is held on its seat by a retainer member 25 herein shown as a cap-like structure comprising an end wall 26, an interiorly threaded skirt 2l removably secured over the nipple I6, an annular internal shoulder 29 for holding the disc on its seat, and conventional radial ports 30 for releasing pressure medium from the cylinder and minimizing recoil or lateral reaction of the cylinder in the event the safety disc bursts.
In order to provide warning means adapted to indicate that the cylinder contains pressure medium, when an attempt is made to remove the retainer member 25 from the nipple I6, the member 25 is formed with a passageway extending from the seat to the atmosphere, that is, to the exterior of the member 25. This passageway includes one or more apertures 3l (one being shown by way of example) extending radially outwardly through the skirt 2l from a point adjacent the seat or between the seat and the shoulder 29 to the exterior, whereby, when the retainer member 25 is unscrewed slightly, pressure medium confined by the disc 22 is adapted to escape through the aperture to produce an audible warning.
Such awarning to a skilled person indicates that the cylinder still contains pressure medium. The cylinder should then be weighed to determine the exact content of pressure medium, which if not sufcient to warrant salvaging, may be released by opening the valve. The retainer may then be safely removed. In the event a careless or curious person perceives the warning, such person will be frightened into abandoning the attempt to unscrew the disc retainer or will be urged to screw the disc retainer in place again lest his tampering be detected.
In Figure 2, a valve is shown which is similar to the valve l shown in Figure 1, except that the safety discharge means are in accordance with another embodiment of the invention.
In this embodiment, the safety discharge means includes a spud 34 formed on the valve body l2. The spud has an interiorly threaded bore 35 and an annular shoulder 33 within the bore which, together with a gasket or Washer 24, provides a seat for a safety disc 22 adapted to be held thereon by a retainer member 36.
The retainer member 36 is in the form of a. hollow plug-like structure comprising an end wall 31, an outer flange-like section 39 formed with a plurality of radial recoil minimizing ports 40, and an inner threadedsection 4I screwed into the bore of the spud and having an annular inner end surface 42 for engaging the disc 22 to hold the same on its seat.
The warning means in this embodiment of the invention are provided by a passageway extending from the seat to the exterior of the spud which includes one or more apertures 44 extending radially outwardly through the wall of the spud from the bore thereof at a point adjacent for closing said opening, and means removably` secured to said outlet means for normally retain-"l the seat from the disc 22 to the exterior of the spud.
When the retainer member 36 is unscrewed slightly, pressure medium conned by the disc 22 is adapted to escape through the aperture 44 to produce an audible warning as described in connection with the embodiment ofthe invention illustrated in Figure 1.
From the foregoing description, it will be seen that the present invention provides a simple, practical and eiective warning means for safety discharge outlets associated with valves, control heads, fittings and the like. The warning means can be provided without material increase in cost of the devices to which they are applied, simply by the formation of an aperture 3| or 44 properly located with respect to the seat for the safety disc 22.
As various changes may be made in the form, construction and arrangement of the parts herein, without departing from the spirit and scope of the invention and without sacrificing any of its advantages, it is to be understood that all matter herein is tobe interpreted as illustrative and not in any limiting sense.
I claim:
1. In a valve or the like for fluid medium under'- pressure, the combination of safety discharge butlet means formed with an opening and a seat sur-* rounding said opening, a safety disc on said 'seat ing said disc on said seat to form a pressure-tight 5 seal, one oi said means having a passageway ex"- tending from said seat to the 'exterior thereof for permitting fluid medium confined by said'disc"- to escape therethrough and to` serve as Ya warn'l` ing vent only when an attempt is made to remove said disc retaining means while pressure medium is conned by said disc whereby the seal is broken."A
2. In a valve or the like for fluid medium under," pressure, the combination of safety discharge Outonly when an attempt is made to remove said retaining means while pressure medium is confined by said disc whereby the seal is brokenlfv 3. In a valve or the like for fluid medium under pressure, the combination of safety discharge outlet means having a tubular section formed withA an opening and a seat surrounding said`openi'ng, a safety disc on said seat for closing said opening,
and means having a tubular section removably secured to said first mentioned tubular sectionin telesc'oping relation and having Va 'surfacefor no'- mally retaining said disc on said seat to formA a pressure-tight seal, one of said means having an aperture extending radially through the tubular section thereof from a point adjacent Vsaidsirface to the exterior thereof for permitting'fiuid medium confined by said disc to escape thjeret'hroughand to serve as a warning vent only when an alal tempt is made to remove said discretainingmeans, f while pressure medium is confined by said disc,n
whereby thefs'eal is broken. l Y.
4, in a valve cr the' like for nuid medium un er pressure. the combination 'of safety discutirse-Buti let means including a nipple formed with an opening and a seat surrounding said opening, a safety disc on said seat for closing said opening, and a cap-like structure removably secured over said nipple for normally retaining said disc on said seat to form a pressure-tight seal, said structure having an aperture extending outwardly therethrough from a point adjacent said seat to the exterior thereof for permitting uid medium conned by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure while pressure medium is confined by said disc whereby the seal is broken.
5, In a valve or the like for fluid medium under pressure, the combination of safety discharge outlet means including a tubular nipple formed with an opening and a seat surrounding said opening, a safety disc on said seat for closing said opening, and a cap-like structure having a tubular section removably secured over said nipple and having a surface at the interior thereof for normally retaining said disc on said seat to form a pressuretight seal, said tubular section having an aperture extending radially outwardly therethrough from a point between said surface and said seat to the exterior thereof for permitting fluid medium conned by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure While pressure medium is conned by said disc whereby the seal is broken..
6. In a valve or the like for fluid medium under pressure, the combination of safety discharge outlet means including a Spud formedwith a threaded opening and a seat within said opening, a safety disc on said seat for closing said opening, and a plug-like structure removably secured in said opening and normally retaining said disc on said seat to form a pressure-tight seal, said Spud having an aperture extending radially outwardly therethrough from a point adjacent said seat to the exterior thereof for permitting fluid medium confined by said disc to escape therethrough and to serve as a warning vent only when an attempt is made to remove said structure while pressure f medium is confined by said disc whereby lthe seal is broken.
HENRY E. HEIGIS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 568,680 Henderson Sept. 29, 1896 1,068,675 Lightfoot July 29, 1913 2,106,176 Huffman et al. Jan. 25, 1938 2,414,113 Mapes Jan. 14, 1947 2,521,773 Bierman Sept. 12, 1950
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719532A (en) * 1952-08-19 1955-10-04 Specialties Dev Corp Valve
US2743036A (en) * 1952-05-28 1956-04-24 American Electro Metal Corp Safety devices for compressed gas containers
DE1043741B (en) * 1953-05-19 1958-11-13 Bahco Ab Combined venting and safety valve, especially for containers that contain an easily gasifying, flammable liquid
US2975983A (en) * 1959-11-04 1961-03-21 Warren H Niebling Garden hose safety valve
US3565088A (en) * 1967-10-26 1971-02-23 Cornelius Co Combined shut-off valve and handle construction
US4139005A (en) * 1977-09-01 1979-02-13 Dickey Gilbert C Safety release pipe cap
US4508133A (en) * 1984-01-31 1985-04-02 Halliburton Company Protective cover retainer
US4520837A (en) * 1984-01-31 1985-06-04 Halliburton Company Cover retainer
US4744382A (en) * 1987-04-29 1988-05-17 Aluminum Company Of America Combination thermal or pressure activated relief valve
US4937019A (en) * 1987-10-01 1990-06-26 Isoworth Limited Pressure vessel
US5234015A (en) * 1991-04-26 1993-08-10 Nippon Tansan Gas Company Limited Gas supply mechanism with safety device
US6173767B1 (en) * 1996-10-11 2001-01-16 Sgcm Partnership, L.P. Pressure release device for cooling coils
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
US9448018B2 (en) 2012-11-19 2016-09-20 Robert Cooney Expansion relief header for protecting heat transfer coils in HVAC systems
US10260823B2 (en) 2012-11-19 2019-04-16 Robert Cooney Freeze protection system with drainage control for heat transfer coils in HVAC systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568680A (en) * 1896-09-29 henderson
US1068675A (en) * 1912-10-12 1913-07-29 Linde Air Prod Co Safety relief device for gases under pressure.
US2106176A (en) * 1935-03-02 1938-01-25 William E Huffman Quick release valve
US2414113A (en) * 1944-09-26 1947-01-14 Specialties Dev Corp Test means for high-pressure fluid medium containers
US2521773A (en) * 1945-07-12 1950-09-12 Daniel H Bierman Vented closure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568680A (en) * 1896-09-29 henderson
US1068675A (en) * 1912-10-12 1913-07-29 Linde Air Prod Co Safety relief device for gases under pressure.
US2106176A (en) * 1935-03-02 1938-01-25 William E Huffman Quick release valve
US2414113A (en) * 1944-09-26 1947-01-14 Specialties Dev Corp Test means for high-pressure fluid medium containers
US2521773A (en) * 1945-07-12 1950-09-12 Daniel H Bierman Vented closure

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743036A (en) * 1952-05-28 1956-04-24 American Electro Metal Corp Safety devices for compressed gas containers
US2719532A (en) * 1952-08-19 1955-10-04 Specialties Dev Corp Valve
DE1043741B (en) * 1953-05-19 1958-11-13 Bahco Ab Combined venting and safety valve, especially for containers that contain an easily gasifying, flammable liquid
US2975983A (en) * 1959-11-04 1961-03-21 Warren H Niebling Garden hose safety valve
US3565088A (en) * 1967-10-26 1971-02-23 Cornelius Co Combined shut-off valve and handle construction
US4139005A (en) * 1977-09-01 1979-02-13 Dickey Gilbert C Safety release pipe cap
US4508133A (en) * 1984-01-31 1985-04-02 Halliburton Company Protective cover retainer
US4520837A (en) * 1984-01-31 1985-06-04 Halliburton Company Cover retainer
US4744382A (en) * 1987-04-29 1988-05-17 Aluminum Company Of America Combination thermal or pressure activated relief valve
US4937019A (en) * 1987-10-01 1990-06-26 Isoworth Limited Pressure vessel
US5234015A (en) * 1991-04-26 1993-08-10 Nippon Tansan Gas Company Limited Gas supply mechanism with safety device
US6173767B1 (en) * 1996-10-11 2001-01-16 Sgcm Partnership, L.P. Pressure release device for cooling coils
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
US9448018B2 (en) 2012-11-19 2016-09-20 Robert Cooney Expansion relief header for protecting heat transfer coils in HVAC systems
US9541338B2 (en) 2012-11-19 2017-01-10 Robert Cooney Method for controlling an expansion relief header for protecting heat transfer coils in HVAC systems
US10260823B2 (en) 2012-11-19 2019-04-16 Robert Cooney Freeze protection system with drainage control for heat transfer coils in HVAC systems

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