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Publication numberUS1690072 A
Publication typeGrant
Publication dateOct 30, 1928
Filing dateNov 13, 1924
Priority dateNov 13, 1924
Publication numberUS 1690072 A, US 1690072A, US-A-1690072, US1690072 A, US1690072A
InventorsJohnson Cleon R
Original AssigneeStandard Oil Dev Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Receptacle for volatile liquids
US 1690072 A
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Description  (OCR text may contain errors)

Oct. 30, 1928.

LIQUID LEVEL 1,690,072 C. R. JOHNSON RECEPTACLE FOR VOLATILE LIQUIDS l3, 1924 2 Sheets-Sheet l Filed Nov.

LLIQUID LEVEL FIG. 2 m CLEOH JOHNSON .hwnli Oct. 30, 1928. 1,690,072

c. R. JOHNSON RECEPTACLE FOR VOLATILE LIQUIDS Filed Nov. 13, 1924 2 Sheets-Sheet 2 WlRE. 502mm EUPPOTZ'HNQ CHAMBER CLEOH Jm-mson H mwm Wk/ax CTHcmul Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

CLEON a aonnson, or nous'ron, TEXAS, AssIGNoR' 'ro STANDARD on. DEVELOPMENT COMPANY, A CORPORATION or DELAWARE.

BE CE PTACLE FOR VOLATILE LIQUIDS.

Application filed November 18, 1924. Serial No. 749,721.

. tainers there is considerable loss by volatilization. Also, upon decrease of temperature a partial vacuum may-form in the container and air is drawn in." This is often highly undesirable on account of oxidation of the material, formation of explosive mixtures, o

the like.

According to the present invention these difliculties are avoided and positive advantages are obtained by providing an inflatable chamber within the container. The chamber is adapted to receive air which may tend to be drawn into the container because of a subatmos heric pressure therein. It is deflated with t 1e expulsion of the air when the temperature rises and there is a resultant increase of vapor pressure and expansion of vapors in the container to produce a superatmospheric ressure.

The invention will be more fully described in connection with the accompanying drawin in which i 1 is a vertical section through a tank provided with an inflatable chamber;

Fig. 2 is a similar view, showing the chamber inflated;

Figs. 3 and 5 are a top plan view of the tank, the cover being removed; and

F i 4 is a vertical section throu h a modified form of tank and inflatable c amber.

Referring to Figs. 1 to 3, reference numeral 1 denotes a tank such as is commonly used for the storage of gasoline. This has been selected for illustration because the invention is articularly applicable in this connection. here is no limitation to this use, as the means described is advantageous in the storage and shipment of volatile liquids generally. The tank is provided with a pressure-vacuum safety valve 2 and vent plpe 3. The ressure-vacuum valve will be set to relieve a normal pressures, such as are encountered particularl in 'ng or emptying the tank. A conica screen adapted to stop the passage of flame, may be installed over the valve. The screen is protected by a sheet metal cover S.

The inflatable chamber 4 comprises a bag substantially impermeable by air and by the vapor of the liquid. The bag may be made from any suitable impermeable material having sufficient strength and flexibility, for example cloth impregnated with a mixture of glue and glycerine. If desirable, wires or other supports 5 may beprovided to keep the bag from contact with the liquid in the tank. A screen S may be installed in the vent ipe 3, in case there should beleakage of in ammable vapor through the bag. We may use a chamber having metallic walls 'ointed for expansion, or similar devices,

at in general-balloonlike receivers are more suitable.

The inflatable device is placed within the tank and connected to the vent pipe. The device is preferably of such size that when fully inflated it occupies about 20-40% of the volume of the vapor space in the tank. It may of course be larger, if desired, but in e(general it should not be smaller when us in connection with liquids as volatile as gasoline. Where very high temperatures are likel to be encountered the inflatable chamber s ould be correspondingly capacious.

It is desirable to attach the inflatable chamber or bag in deflated condition when the temperature is high; or inflated, at a time of low temperature. If it is attached when the temperature is high the ba will assume the position shown in Fig. 1. pon fall of temperature, air will be drawn 1n and will distend the bag to the position shown in Fig. 2. When the temperature rises again the pressure of the vapors evolved in the tank will compress the bag and force the air from it. The tank is thus permitted to breathe without any interchange between its contents and the atmosphere.

In the form of the invention shown in Fi 4, the principle is the same, but an expansib e device 6 having a central opening is used. This is so arranged that it avoids the supporting columns 7 which sustain the roof of the tank 8. It is illustrated in inflated condition and as enerally annular in contour.

The inflatab e member may be immersed in the liquid at least in part, provided the hydrostatic pressure upon it is not suflicient to interfere with its proper operation and that the material of the inflatable member is not injured by contact with the liquid. Unless the inflatable member is strong enough to sustain the maximum pressure that may be exerted upon it, the provision or a safety valve 9 on the vent pipe 3 is desirable. The valve may be adjusted to close at a predetermined pressure, thus shutting oii further entry of air into'the member. A manually operated valve may be used, if desired.

By means of the present invention valuable vapors are substantially completely retained at all times within the container and air is prevented from entering it. In addition to preventing the wastage of gasoline or the like, the present invention has'a further important advantage in avoiding the fire risk incident to the outward breathing of inflammable vapors.

Various modifications of the illustrative constructions described may be made within the scope of the appended claims.

I claim:

1. A storage tank having a roof supported by a plurality of columns, a. vent through said roof, an ex )ansible-chamber encircling a portion of sai columns, and a connection between the chamber and the vent.

2. Storage 0. paratus for volatile liquids, comprising a c osed container having a vent,

an inflatable member within said container and an opening to the exterior thereof through the vent, said member being actuated by variation of pressure in the container, and a safety valve on the vent uctuable to pre- Egnt excessive pressure on the inflatable memr. 3. Storage apparatus for volatile liquids, comprising a closed container having a vent, an inflatable member within said container and opening to the exterior thereof through the vent, a screen below the member and adapted to support the same out of contact with the liquid, said member being actuated by variation of pressure in the container, and a fire-stopping screen arranged in the vent.

4. Storage apparatus for volatile liquids comprising a container having a vent, an inflatable member within the container and opening to the exterior thereof through the vent, and a screen adapted to support the member permanently out of contact with the liquid, said member being actuated by variations of pressure in the container and when fully expanded occupying 20 to 40% of the vapor space normally left above the li uid.

CLEON R. JOHN ON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2600103 *Feb 19, 1948Jun 10, 1952Franz Feck JohnMeans for absorbing ice pressure
US2601270 *Nov 12, 1946Jun 24, 1952Chicago Bridge & Iron CoStorage tank for liquids
US2611512 *Oct 3, 1947Sep 23, 1952Leo C KrazinskiExplosion-proof gasoline tank
US2643602 *Jul 2, 1949Jun 30, 1953Smith Corp A OPressure protected silolike container for preserving farm crops
US3003659 *Sep 11, 1958Oct 10, 1961Clark Equipment CoCollapsible reservoir
US3076403 *Jun 20, 1960Feb 5, 1963Behlen Mfg Company IncMeans for maintaining substantially atmospheric pressure inside sealed housings
US3144953 *Dec 20, 1961Aug 18, 1964Taylor William HAnti-slosh device
US3193058 *Feb 16, 1962Jul 6, 1965Smith Harvestore ProductsBreather bag construction
US3339474 *Jan 14, 1966Sep 5, 1967Whirlpool CoApparatus for transporting plant and animal materials
US3807901 *Nov 15, 1968Apr 30, 1974Wilson RSewage lift station gas trap
US6041820 *Sep 16, 1998Mar 28, 2000Boehme; MathiasService and heating water combined expansion tank
US6527002 *Mar 16, 1999Mar 4, 2003Istvan SzakalyApparatus and method for use with a container for storing a substance
US6681789 *Mar 28, 2002Jan 27, 2004The United States Of America As Represented By The United States Environmental Protection AgencyFuel tank ventilation system and method for substantially preventing fuel vapor emissions
US7287543 *Mar 9, 2006Oct 30, 2007Ching-Chuan WuHydraulic device
US8002142Jun 19, 2008Aug 23, 2011Honeywell International Inc.Ambient pressure-responsive variable volume fuel tank
US8113227 *Dec 21, 2006Feb 14, 2012Societe BicFuel cartridge with flexible liner
US8748059 *Feb 6, 2012Jun 10, 2014Societe BicFuel cartridge with flexible liner
US20120135335 *Feb 6, 2012May 31, 2012Societe BicFuel Cartridge with Flexible Liner
DE3415579A1 *Apr 26, 1984Oct 31, 1984Smith Harvestore ProductsDruckausgleichssystem fuer dichte speicherkonstruktionen
Classifications
U.S. Classification220/721
International ClassificationA62C4/00
Cooperative ClassificationA62C4/00
European ClassificationA62C4/00