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Publication numberUS3385481 A
Publication typeGrant
Publication dateMay 28, 1968
Filing dateAug 12, 1966
Priority dateAug 12, 1966
Publication numberUS 3385481 A, US 3385481A, US-A-3385481, US3385481 A, US3385481A
InventorsJohn Frangos
Original AssigneeRevlon
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety valve for aerosol containers
US 3385481 A
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Description  (OCR text may contain errors)

y 23, 1958 J. FRANGOS 3,385,481

' SAFETY VALVE FOR AEROSOL CONTAINERS Filed Aug. 12, 1966 Fig.1.

/7 f6 /2 A? V/ /Z '/4 mvsmoa: day/v hem/ 05 United States Patent Olfice 3,385,481 SAFETY VALVE FOR AEROSOL CONTAINERS John Frangos, Brooklyn, N.Y., assignor to Revlon, Inc., New York, N.Y., a corporation of Delaware Filed Aug. 12, 1966, Ser. No. 572,086 4 Claims. (Cl. 222-396) ABSTRACT OF THE DISCLOSURE A valve for dispensing pressurized fluids from a container through a valve stem which extends from said container and is supported by a valve core within the container, said valve core having a frangible pressurerupturable segment integral therewith formed by attenuating the valve core thickness in portions beneath said valve stem and adapted to rupture at a predetermined pressure value to relieve excess pressure.

The present invention relates to the dispensing of fluid materials from containers under the influence of a propellant in the container. In particular, the invention relates to improved dispensing devices incorporating a safety valve.

The containers described above include containers of the aerosol type which generally comprise a container body, which holds a liquid or liquefied vaporizable propellant and a material to be dispensed, and a valve assembly controlling the emission of the material and propellants from the container body. Containers of this type are commonly fashioned of sheet metal safely to withstand the pressures generated by the propellant within the container at room temperatures.

However, if the container is raised to abnormally high temperatures, the pressure generated within the container may cause rupture thereof. For example, a propellant mixture of dichlorodifluoromethane and trichloromonofluoromethane blended to have a vapor pressure of 34 pounds p.s.i.g. at 70 F. will have a pressure of 145 pounds p.s.i.g. at 160 F. Accordingly, aerosol containers in commerce are marked clearly with warning that the containers are not to be heated or incinerated. Nevertheless, these warnings are sometimes ignored, often by inadvertence when disposing of spent containers, and explosive rupture of the containers results.

According to the present invention, containers of this type for dispensing fluids under pressure are provided with a safety valve which will open the container to the atmosphere through the valve when the contents of the container reach a predetermined pressure less than that which would result in explosive rupture of the container. The safety valve according to the present invention is cheaply and easily manufactured.

A better understanding of the present invention and of its many advantages will be had by referring to the accompanying drawings, in which FIG. 1 is a side view, in section, through a safety valve according to the present invention; and FIGS. 2 and 3 are more detailed sectional views of a similar valve.

In the figures, the valve shown comprises valve body 11 adapted to be sealed to an aerosol container, for example by ferrule 12, which can be crimped to the mouth of the container to form a fluid-tight seal between the valve and the container. Movably mounted within valve 3,385,481 Patented May 28, 1968 body 11 is valve core 14 supported within valve body 11 by compressible spring 15. Projecting upwardly out of said container is valve stem 16 having orifice 17. Said valve stem 16 may be integral with valve core 14 as in FIG. 1, or separately fashioned, as shown in FIGS. 2 and 3. In either case, downward pressure on stem 16 depresses valve core 14. In the closed position of the valve, shown in FIG. 1, valve stem 16 and the interior of the container are not in communication. Upon depression of valve stem 16 to bring orifice 17 below gasket 13, the container and valve stem 16 are in communication through orifice 17, permiting the contents of the container to be dispensed.

Valve core 14 comprises pressure rupturable frangible segment 18, conveniently formed within valve core 14 by molding core 14 to be of attenuated thickness in portions directly below projecting valve stem 16. When the pressure of the contents of the container to which a valve of the type shown is aflixed exceeds a certain pressure, pressure rupturable frangible segment 18 fails, for example as shown in FIG. 3, directly opening the container to the atmosphere. The thickness of frangible segment 18 with respect to other portions of core 14 will vary depending on the strength of the material from which it is fashioned and the maximum pressure which it is designed to withstand.

While preferred embodiments have been shown and described, it is to be understood that some changes may be made in the details of the structure without departing from the spirit of the invention or exceeding the scope of the claims.

What is claimed is:

1. In a valve for dispensing fluids under pressure from a closed container, said valve comprising a valve body, means for sealing said valve body on said container, a valve core within said valve body, and a valve stem extending upwardly out of said container above said valve core, the improvement wherein said valve core includes a pressure-rupturable frangible segment integral with said valve core and formed by attenuation of the thickness of those portions of said valve core beneath said valve stem, said segment being adapted to rupture when the pressure in said container exceeds a predetermined value to open said container and relieve the pressure therein.

2. A valve as in claim 1 wherein said pressure rupturable frangible segment is lenticul'ar.

3. A valve as in claim 1 wherein said valve core and valve stem are integral.

4. A valve as in claim 1 wherein said valve core and said valve stem are separate.

References Cited UNITED STATES PATENTS 1,348,708 8/1920 Garland 137-797 X 3,081,919 3/1963 Samuel 222-396 3,248,015 4/1966 De Giorgi 222402.24 3,155,292 11/1964 Webster 222-397 FOREIGN PATENTS 643,960 9/ 1950 Great Britain.

ROBERT B. REEVES, Primary Examiner.

HADD S. LANE, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1348708 *Jun 26, 1919Aug 3, 1920Garland Edward EStemless self-closing valve for high-pressure tanks
US3081919 *Apr 3, 1959Mar 19, 1963Gulf Research Development CoCombination dispensing and excess pressure relief valve
US3155292 *Apr 13, 1962Nov 3, 1964Bernz O Matic CorpSafety valve arrangement for pressurized containers
US3248015 *Dec 2, 1963Apr 26, 1966Giorgi Dino DeValve for pressurized liquid spraying containers
GB643960A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4937019 *Sep 19, 1988Jun 26, 1990Isoworth LimitedPressure vessel
US5232124 *Mar 10, 1992Aug 3, 1993Advanced Monobloc CorporationPressure relief device and method
US5553741 *Dec 23, 1994Sep 10, 1996River Medical, Inc.Liquid delivery device
US5578005 *Sep 16, 1994Nov 26, 1996River Medical, Inc.Apparatus and methods for multiple fluid infusion
US5588556 *Jun 5, 1995Dec 31, 1996River Medical, Inc.Method for generating gas to deliver liquid from a container
US5700245 *Jul 13, 1995Dec 23, 1997Winfield MedicalApparatus for the generation of gas pressure for controlled fluid delivery
US5975356 *Apr 1, 1999Nov 2, 1999L'orealDispenser for a product of a liquid to pasty consistency comprising a safety device
US6058960 *Mar 16, 1998May 9, 2000C. Ehrensperger AgDevice serving as a valve insert for fluid containers under pressure
EP0560573A2 *Mar 9, 1993Sep 15, 1993Advanced Monobloc CorporationPressure relief device and method
Classifications
U.S. Classification222/396, 137/797
International ClassificationB65D83/14
Cooperative ClassificationB65D83/70
European ClassificationB65D83/70