US3028918A - Inner charge container for fire extinguishers - Google Patents

Inner charge container for fire extinguishers Download PDF

Info

Publication number
US3028918A
US3028918A US789873A US78987359A US3028918A US 3028918 A US3028918 A US 3028918A US 789873 A US789873 A US 789873A US 78987359 A US78987359 A US 78987359A US 3028918 A US3028918 A US 3028918A
Authority
US
United States
Prior art keywords
container
flange
fire extinguisher
molded
inner container
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.)
Expired - Lifetime
Application number
US789873A
Inventor
Sr Charles K Huthsing
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEN FIRE EXTINGUISHER CO OF PE
GENERAL FIRE EXTINGUISHER CO OF PENNSYLVANIA
Original Assignee
GEN FIRE EXTINGUISHER CO OF PE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEN FIRE EXTINGUISHER CO OF PE filed Critical GEN FIRE EXTINGUISHER CO OF PE
Priority to US789873A priority Critical patent/US3028918A/en
Application granted granted Critical
Publication of US3028918A publication Critical patent/US3028918A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/003—Extinguishers with spraying and projection of extinguishing agents by pressurised gas

Definitions

  • the present invention pertains to an improved fire extinguisher construction and more particularly to an improved container of molded plastic construction especially suited for use in a pressure generating type fire extinguisher for holding a liquid reagent therein.
  • One important object of the present invention is to provide an improved fire extinguisher container of high- 1y corrosion resistant and long lasting yet inexpensive construction.
  • Another objects of the invention are: to provide an improved container for use in a pressure generating type fire extinguisher, which is long wearing, and highly corrosion resistant, yet inexpensive to manufacture; to provide an improved elongated tubular container of molded construction and method of making it, the container having an integrally molded closure at one end and an in tegrally molded inturned flange at its other end; to provide an improved elongated tubular container of molded plastic construction comprising two end-to-end slightly tapered tubular portions sealingly spliced together by means of a molded adapter ring, the container being relatively inexpensive to manufacture, and corrosion resistant to any desired degree, depending upon the material of which it is molded.
  • FIGURE 1 is an exploded perspective view of a molded plastic inner container for use in a first extinguisher according to the present invention
  • FIG. 2 is a cross-sectional view, partly in elevation showing the container installed in an otherwise conventional pressure generating type fire extinguisher;
  • FIG. 3 is a fragmentary cross-sectional view partly in elevation showing the extinguisher illustrated in FIG. 2 in an inverted position.
  • the pressure generating type fire extinguisher shown in the drawing includes a molded plastic inner container it ⁇ according to a preferred embodiment of the invention supported within an outer casing, or pressure vessel 12, which as shown is of entirely conventional construction.
  • the outer casing 12 is filled with a water solution of soda, and a liquid reagent such as a solution of aluminum sulfite, capable of rapidly generating gas when mixed with the soda solution, is placed within the inner container 10.
  • the fire extinguisher is normally stored in an upright position, as shown in FIG. 2.
  • the extinguisher In the event of a fire, the extinguisher is usually inverted, whereupon the reagent within the inner container flows out of the inner container 10, and mixes and reacts with the soda solution in the outer casing 12, generating gas under relatively high pressure, which acts to drive the soda solution and the spent reaction mixture out of the casing 12 through the nipple 14 and the hose 16.
  • a fire extinguisher is ordinarily emergency equipment, and is kept on stand-by for long periods of time, during which it must retain its ability to generate pressure, so that when an emergency arises and the extinguisher is put to use, it will be effective for its purpose.
  • the inner container 14 ⁇ be im pervious to liquids, and corrosion resistant, so that the reagent contained within the inner container 13 does not leak out duringstand-by, periods and become mixed with the soda solution in the outer casing 12, thereby dissipat ing theability of the extinguisher to develop pressure when it is called into service.
  • the inner container It therefore, must be leakproof and must be able to withstand the corrosive eifects of the soda solution 12 and of the foam generating reagent stored within the inner container 10 for long periods of time without developing even so much as a pinhole leak;
  • the inner container of fire extinguishers of this type have heretofore been made of sheet metal coated with a waterproofing and corrosion preventive material. It has been relatively difficult to make such sheet :metal containers water-tight and sufficiently corrosion resistant to retain their water-tight characteristics over relatively long periods of time.
  • the container is made from a flat piece of. sheet metal, and includes a longitudinal seam extending for its full length, which must be soldered or welded, and a separate bottom member, which also must be soldered in place. The seams and joinings increase the difiiculty of applying a uniform protective coating and thereby serve to promote corrosion and leakage, besides involving a relatively high manufacturing cost.
  • the inner container 11'! is formed of noncorrosive molded plastic or other suitable material, and includes an integrally molded bottom closure 26, and an integrally molded inturned top flange 22 for supporting the stopple 24, which normally closes the upper end of the container 10.
  • the container 10 is molded in four pieces, and includes a bottom portion 26, an upper tubular portion 28, a splice ring 32, and an upper guide portion 30, all of which are cemented together to form a sturdy container.
  • the guide portion 39 guides the stopple 24 when the fire extinguisher is inverted during operation and insures proper return of the stopple to its seated position upon the flange 22 when the extinguisher is returned to its normal upright position.
  • the container 10 is relatively long and of narrow diameter, and because of its proportions, as well as its integrally molded bottom closure 20 and inturned flange.
  • the bottom portion 26 and the upper portion 28 are, therefore, molded sepa rately and are joined together with or without the adapter, or splice ring 32, by pressing said parts together and by securing and sealing them by means of an appropriate cement (not separately designated).
  • the bottom portion 26 is tapered so that it is of slightly greater diameter at the top than at the bottom, in order to facilitate withdrawal of the molding mandrel, or core member during manufacture, and the upper portion 28is made slightly wider at its lower end than at its upper end for the same reason.
  • the mating ends of the two portions 26 and 28 are made of substantially the same diameter so that they form a smooth juncture at the middle of the container.
  • the splice ring 32 is provided with an outwardly projecting flange 34 about midway along its length and of a height about equal to the thickness of the wall section of the two portions 26 and 28.
  • the flange 34 acts as a stop when the splice ring 32 is inserted in either one of the portions 26 and 28, and insures that the splice ring I be made of lead or any other desired material.
  • An exterior shoulder 36 and an axially projecting flange 38 are formed at the top of the upper portion 28 for receiving the guide portion 38, the bottom ring 49 of which fits tightly around and is cemented to the flange 38.
  • the guide portion 30 includes an outwardly extending flange 42 at its upper end for supporting the inner container 10 within the fire extinguisher.
  • the flange 42 rests upon an inwardly projecting flange 46 of the collar 44, which reinforces the top of the outer casing 12.
  • the flange 46 has an inside diameter just greater than the greatest diameter of the container ltl, and thus permits the inner container 10 to be readily inserted into and removed from the outer casing 12,.
  • the flange 42 at the top of the guide portion 30 engages and rests upon the collar flange 46 for supporting the inner container 10 within the fire extinguisher.
  • the handwheel cap 52 fits upon the collar 44 and abuts the top of the flange 42, thereby limiting upward movement of the container 18 and securing it in position.
  • the side walls 48 of the guide portion 30 are apertured as at 59 to provide ready discharge of the contents of the container 10 into the outer casing 12 when the fire extinguisher is inverted to the position shown in FIG. 3.
  • the side walls 48 of the guide portion serve to hold the stopple 24 when the extinguisher is inverted, and to guide the stopple so that it will fall back properly upon the flange 22 when the extinguisher is restored to its normal upright position.
  • the inner container 10 may be molded of any desired rnoldable material, such as a synthetic resin, hard rubber or the like, having the desired corrosion resistance and strength properties.
  • Polyethylene has been found to be suitable for most presently known fire extinguisher uses, since it is relatively inexpensive, is easily moldable, and is substantially inert to most presently used chemicals, as well as having excellent physical properties, such as tensile strength and resilience.
  • An elongated tubular container of molded plastic construction for use in a pressure generating type fire extinguisher or the like as the inner charge container thereof comprising a tapered generally tubular bottom portion having an integrally molded bottom closure and an open top, said bottom portion being wider at its top than at its bottom end, a tapered generally tubular upper portion having a relatively wide lower end and a relatively narrow upper end and an inwardly offset axially extending flange near its upper end, the lower end of said upper portion being of substantially the same diameter as the upper end of said bottom portion, a splicing ring fitted within both of said portions and sealed thereto for joining said portions together, and a separately formed stopple guide secured to said axially extending flange and extending upwardly therefrom, said guide being generally tubular in shape and having a perforate circumferential wall to permit lateral flow of fluid therethrough, said guide also having an annular, radially outwardly projecting flange at its upper end for axially supporting said inner container within a conventional

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Packages (AREA)

Description

April 10, 1962 c. K. HUTHSING, SR 3,028,918
INNER CHARGE CONTAINER FOR FIRE EXTINGUISHERS Filed Jan. 29, 1959 44 ny Y 44 I a l INVENTOR.
United States Patent @fifice 3,928,918 Patented Apr. 10, 1962 3,tl28,918 INNER CHARGE CONTAINER'FOR FKRE EXTlNGUISI-IERS Charles K. Huthsing, Sn, Culver City, Caiifi, a'ssignor to The General Fire Extinguisher Co. of Pennsylvania,
Philadelphia, Pa e corporation of Pennsylvania Filed Jan. 29', 1959, Ser. Ne. 789,873 1 Claim. (Cl. 169-32) The present invention pertains to an improved fire extinguisher construction and more particularly to an improved container of molded plastic construction especially suited for use in a pressure generating type fire extinguisher for holding a liquid reagent therein.
One important object of the present invention is to provide an improved fire extinguisher container of high- 1y corrosion resistant and long lasting yet inexpensive construction.
Other objects of the invention are: to provide an improved container for use in a pressure generating type fire extinguisher, which is long wearing, and highly corrosion resistant, yet inexpensive to manufacture; to provide an improved elongated tubular container of molded construction and method of making it, the container having an integrally molded closure at one end and an in tegrally molded inturned flange at its other end; to provide an improved elongated tubular container of molded plastic construction comprising two end-to-end slightly tapered tubular portions sealingly spliced together by means of a molded adapter ring, the container being relatively inexpensive to manufacture, and corrosion resistant to any desired degree, depending upon the material of which it is molded.
The foregoing and other objects and advantages of the present invention will become apparent in the following detailed description of a preferred embodiment thereof, taken in conjunction with the drawing, wherein:
FIGURE 1 is an exploded perspective view of a molded plastic inner container for use in a first extinguisher according to the present invention;
FIG. 2 is a cross-sectional view, partly in elevation showing the container installed in an otherwise conventional pressure generating type fire extinguisher; and
FIG. 3 is a fragmentary cross-sectional view partly in elevation showing the extinguisher illustrated in FIG. 2 in an inverted position.
The pressure generating type fire extinguisher shown in the drawing includes a molded plastic inner container it} according to a preferred embodiment of the invention supported within an outer casing, or pressure vessel 12, which as shown is of entirely conventional construction. Normally, the outer casing 12 is filled with a water solution of soda, and a liquid reagent such as a solution of aluminum sulfite, capable of rapidly generating gas when mixed with the soda solution, is placed within the inner container 10. The fire extinguisher is normally stored in an upright position, as shown in FIG. 2. In the event of a fire, the extinguisher is usually inverted, whereupon the reagent within the inner container flows out of the inner container 10, and mixes and reacts with the soda solution in the outer casing 12, generating gas under relatively high pressure, which acts to drive the soda solution and the spent reaction mixture out of the casing 12 through the nipple 14 and the hose 16.
A fire extinguisher is ordinarily emergency equipment, and is kept on stand-by for long periods of time, during which it must retain its ability to generate pressure, so that when an emergency arises and the extinguisher is put to use, it will be effective for its purpose. it is important, therefore, that the inner container 14} be im pervious to liquids, and corrosion resistant, so that the reagent contained within the inner container 13 does not leak out duringstand-by, periods and become mixed with the soda solution in the outer casing 12, thereby dissipat ing theability of the extinguisher to develop pressure when it is called into service. The inner container It therefore, must be leakproof and must be able to withstand the corrosive eifects of the soda solution 12 and of the foam generating reagent stored within the inner container 10 for long periods of time without developing even so much as a pinhole leak;
The inner container of fire extinguishers of this type have heretofore been made of sheet metal coated with a waterproofing and corrosion preventive material. It has been relatively difficult to make such sheet :metal containers water-tight and sufficiently corrosion resistant to retain their water-tight characteristics over relatively long periods of time. In the sheet metal construction, the container is made from a flat piece of. sheet metal, and includes a longitudinal seam extending for its full length, which must be soldered or welded, and a separate bottom member, which also must be soldered in place. The seams and joinings increase the difiiculty of applying a uniform protective coating and thereby serve to promote corrosion and leakage, besides involving a relatively high manufacturing cost.
According to the present invention the inner container 11'! is formed of noncorrosive molded plastic or other suitable material, and includes an integrally molded bottom closure 26, and an integrally molded inturned top flange 22 for supporting the stopple 24, which normally closes the upper end of the container 10. The container 10 is molded in four pieces, and includes a bottom portion 26, an upper tubular portion 28, a splice ring 32, and an upper guide portion 30, all of which are cemented together to form a sturdy container. The guide portion 39 guides the stopple 24 when the fire extinguisher is inverted during operation and insures proper return of the stopple to its seated position upon the flange 22 when the extinguisher is returned to its normal upright position.
The container 10 is relatively long and of narrow diameter, and because of its proportions, as well as its integrally molded bottom closure 20 and inturned flange.
22 at its upper end, it is not practical to mold it in a single piece, as the molded one piece container could not be withdrawn from the mold. The bottom portion 26 and the upper portion 28 are, therefore, molded sepa rately and are joined together with or without the adapter, or splice ring 32, by pressing said parts together and by securing and sealing them by means of an appropriate cement (not separately designated). The bottom portion 26 is tapered so that it is of slightly greater diameter at the top than at the bottom, in order to facilitate withdrawal of the molding mandrel, or core member during manufacture, and the upper portion 28is made slightly wider at its lower end than at its upper end for the same reason.
The mating ends of the two portions 26 and 28 are made of substantially the same diameter so that they form a smooth juncture at the middle of the container. The splice ring 32 is provided with an outwardly projecting flange 34 about midway along its length and of a height about equal to the thickness of the wall section of the two portions 26 and 28. The flange 34 acts as a stop when the splice ring 32 is inserted in either one of the portions 26 and 28, and insures that the splice ring I be made of lead or any other desired material. An exterior shoulder 36 and an axially projecting flange 38 are formed at the top of the upper portion 28 for receiving the guide portion 38, the bottom ring 49 of which fits tightly around and is cemented to the flange 38.
The guide portion 30 includes an outwardly extending flange 42 at its upper end for supporting the inner container 10 within the fire extinguisher. The flange 42 rests upon an inwardly projecting flange 46 of the collar 44, which reinforces the top of the outer casing 12. The flange 46 has an inside diameter just greater than the greatest diameter of the container ltl, and thus permits the inner container 10 to be readily inserted into and removed from the outer casing 12,. The flange 42 at the top of the guide portion 30 engages and rests upon the collar flange 46 for supporting the inner container 10 within the fire extinguisher. The handwheel cap 52 fits upon the collar 44 and abuts the top of the flange 42, thereby limiting upward movement of the container 18 and securing it in position.
The side walls 48 of the guide portion 30 are apertured as at 59 to provide ready discharge of the contents of the container 10 into the outer casing 12 when the fire extinguisher is inverted to the position shown in FIG. 3. The side walls 48 of the guide portion serve to hold the stopple 24 when the extinguisher is inverted, and to guide the stopple so that it will fall back properly upon the flange 22 when the extinguisher is restored to its normal upright position.
The inner container 10 may be molded of any desired rnoldable material, such as a synthetic resin, hard rubber or the like, having the desired corrosion resistance and strength properties. Polyethylene has been found to be suitable for most presently known fire extinguisher uses, since it is relatively inexpensive, is easily moldable, and is substantially inert to most presently used chemicals, as well as having excellent physical properties, such as tensile strength and resilience.
What is claimed is:
An elongated tubular container of molded plastic construction for use in a pressure generating type fire extinguisher or the like as the inner charge container thereof comprising a tapered generally tubular bottom portion having an integrally molded bottom closure and an open top, said bottom portion being wider at its top than at its bottom end, a tapered generally tubular upper portion having a relatively wide lower end and a relatively narrow upper end and an inwardly offset axially extending flange near its upper end, the lower end of said upper portion being of substantially the same diameter as the upper end of said bottom portion, a splicing ring fitted within both of said portions and sealed thereto for joining said portions together, and a separately formed stopple guide secured to said axially extending flange and extending upwardly therefrom, said guide being generally tubular in shape and having a perforate circumferential wall to permit lateral flow of fluid therethrough, said guide also having an annular, radially outwardly projecting flange at its upper end for axially supporting said inner container within a conventional fire extinguisher casing.
References Cited in the file of this patent UNITED STATES PATENTS 1,170,927 Moore Feb. 8, 1916 1,646,226 White Oct. 18, 1927 1,788,375 Banfil Jan. 13, 1931 1,973,734 Thomas et al. Sept. 18, 1934 2,751,025 Austin June 19, 1956 2,838,261 Amos et al. June 10, 1958 FOREIGN PATENTS 34,569 Norway Apr. 3, 1922 535,840 Great Britain Apr. 23, 1941
US789873A 1959-01-29 1959-01-29 Inner charge container for fire extinguishers Expired - Lifetime US3028918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US789873A US3028918A (en) 1959-01-29 1959-01-29 Inner charge container for fire extinguishers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US789873A US3028918A (en) 1959-01-29 1959-01-29 Inner charge container for fire extinguishers

Publications (1)

Publication Number Publication Date
US3028918A true US3028918A (en) 1962-04-10

Family

ID=25148928

Family Applications (1)

Application Number Title Priority Date Filing Date
US789873A Expired - Lifetime US3028918A (en) 1959-01-29 1959-01-29 Inner charge container for fire extinguishers

Country Status (1)

Country Link
US (1) US3028918A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989155A (en) * 1976-02-06 1976-11-02 Lawrence Peska Associates, Inc. Invertable fuel tank
US20110278316A1 (en) * 2010-05-11 2011-11-17 Bernardo Herzer Protective Cap for Tank
US10928116B2 (en) * 2019-02-27 2021-02-23 Electrolux Home Products, Inc. Modular water storage tank for a refrigerator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1170927A (en) * 1915-06-04 1916-02-08 Thomas F Moore Art of making barrels.
US1646226A (en) * 1925-08-07 1927-10-18 Foamite Childs Corp Fire extinguisher
US1788375A (en) * 1926-07-21 1931-01-13 William H Banfil Foam-type fire extinguisher
US1973734A (en) * 1929-05-29 1934-09-18 Fyr Fyter Co Fire extinguisher
GB535840A (en) * 1940-01-02 1941-04-23 Pyrene Co Ltd Improvements in fire extinguishing apparatus
US2751025A (en) * 1954-07-26 1956-06-19 Process Engineering Inc Fire extinguisher
US2838261A (en) * 1954-08-31 1958-06-10 Pastushin Aviat Corp Jettisonable fuel tank construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1170927A (en) * 1915-06-04 1916-02-08 Thomas F Moore Art of making barrels.
US1646226A (en) * 1925-08-07 1927-10-18 Foamite Childs Corp Fire extinguisher
US1788375A (en) * 1926-07-21 1931-01-13 William H Banfil Foam-type fire extinguisher
US1973734A (en) * 1929-05-29 1934-09-18 Fyr Fyter Co Fire extinguisher
GB535840A (en) * 1940-01-02 1941-04-23 Pyrene Co Ltd Improvements in fire extinguishing apparatus
US2751025A (en) * 1954-07-26 1956-06-19 Process Engineering Inc Fire extinguisher
US2838261A (en) * 1954-08-31 1958-06-10 Pastushin Aviat Corp Jettisonable fuel tank construction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989155A (en) * 1976-02-06 1976-11-02 Lawrence Peska Associates, Inc. Invertable fuel tank
US20110278316A1 (en) * 2010-05-11 2011-11-17 Bernardo Herzer Protective Cap for Tank
US10928116B2 (en) * 2019-02-27 2021-02-23 Electrolux Home Products, Inc. Modular water storage tank for a refrigerator

Similar Documents

Publication Publication Date Title
US3477195A (en) Method of pressurizing a dispensing container
US3212681A (en) Container structure
US4615437A (en) Bottle closure with separable capsule
SU606545A3 (en) Seal for draining liquids
US5971140A (en) Apparatus for mixing a fluid and a liquid
US5586690A (en) Bulk container with removable liner, discharge fitment for the liner, and adapter for connection to discharge port of the container
JPS58501222A (en) container
US3841524A (en) Automatic liquid dispenser for an inverted bottle
US2969161A (en) Bung for beer barrels and the like
US3034680A (en) Closure
US2127548A (en) Method of treating containers
US3028918A (en) Inner charge container for fire extinguishers
GB2208290A (en) Container
US3532254A (en) Dual compartmented container
US3606089A (en) Product-isolating sack for pressurized dispensers
US3766570A (en) Liquid dispensing device
US2762537A (en) Closure spout
JP2008273561A (en) Funnel
US4508244A (en) Pressure can for application of mounting foams, in particular, single-component polyurethane foams
FI97043B (en) A device used to store a material, such as a liquid, in metal barrels
KR890001111A (en) Fluid Transport Package
US2415906A (en) Head construction for collapsible tubes
US3337083A (en) Closure arrangement for container
US3135412A (en) Fluid coupling
US3270114A (en) Method of molding material to one end of a preformed thermoplastic tube