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Publication numberUS2798639 A
Publication typeGrant
Publication dateJul 9, 1957
Filing dateJul 11, 1955
Priority dateJul 11, 1955
Publication numberUS 2798639 A, US 2798639A, US-A-2798639, US2798639 A, US2798639A
InventorsPeter Urban
Original AssigneeUniversal Oil Prod Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Container
US 2798639 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

y 1957 P. URBAN CONTAINER Filed July 11. 1955 J /v VEN TOR: P'e'fer Urban A TTOR/VEY:

ILN l H IH H M H H H H H H H H H H v AGENT- 2,798,639 Patented July 9, 1957 CONTAINER Peter Urban, Chicago, Ill., assignor to Universal Oil Products Company, Des Plaines, 111., a corporation of Delaware Application July 11, 1955, Serial No. 521,087

2 Claims. (Cl. 220-85) This invention relates to a storage vessel and particu larly to a storage vessel lined with a specially formed flexible material.

It is well known to store air-sensitive material in containers having air-tight, flexible linings so that the lining may deform as the stored material is discharged to maintain it out of contact with the air. These applications have, however, been more or less limited to small containers since the difficulties of lining a large container with a flexible material is too great. When lining a large vessel, such as a stationary storage tank for oil or gas, the flexible liner must be of sufliciently heavy material to support its own weight as well as that of many gallons of fluid. This frequently causes tearing of the liner and more frequently ruptures or leaks at weak spots caused by random creasing as the flexible liner collapses upon emptying the vessel or rubbing against the rigid outer wall. Frequently, the liner may be relieved of the burden of supporting the contained material by disposing a heavier fluid between the liner and the rigid vessel wall, however, as the flexible liner is emptied the heavier material causes a lateral collapse of the liner which introduces new strains upon it and limits the container to a top drawoff since the heavier liquid flowing in under the lighter material contained in the liner causes a bubble of light fluid to be formed which is sealed from a bottom drawoff by the heavier fluid. It is an object of this invention to provide a large diameter vessel with a flexible liner for the storage of air-sensitive material.

In one embodiment, this invention relates to a storage vessel comprising in combination a rigid shell and a flexible liner having inflated horizontal circumferential seg ments therein.

In another embodiment, this invention relates to a storage vessel comprising in combination a rigid shell and a flexible liner having inflated horizontal circumferential segments therein with liquid disposed between said shell and said liner.

This invention can be best described with reference to the accompanying drawing which is intended to be illustrative rather than limiting on the broad scope of this invention. Figure l of the drawing illustrates one embodiment of this invention, wherein the flexible liner is filled wtih air-sensitive material and Figure 2 illustrates the same vessel and liner as it appears when substantially emptied of the air-sensitive material.

Referring to Figure 1, a rigid cylindrical open topped shell 1 which contains a lower outlet conduit 5 has connected thereto a flexible liner 2. The flexible liner may be connected to the shell in any suitable manner either at the periphery of the liner or by a suitable means disposed in outlet conduit 5. The connection between liner 2 and shell 1 must, however, be fluid tight so that the fluid surrounding the liner which is disposed between it and the outer shell, cannot enter the interior of flexible liner 2. The air-sensitive material maintained within liner 2 may be fluid such as gasoline, oil, oxidizable chemicals, etc. which may be either liquid or vapor, however, it is intended that this invention should cover all flowable materials which it is desired to store in the absence of air.

Flexible liner 2 has disposed therein circular, circumferential, horizontal inflated segments 3 which are filled with a fluid such as compressed air so that they are rigid and preferably buoyant. Surrounding liner 2, between it and shell 1 is a liquid 4 which supports liner 2 laterally to prevent it from rubbing against the hard shell thereby causing leaks in the flexible liner. It is preferred that liquid 4 be more dense than the fluid within liner 2 so that the folds in liner 2 will collapse towards the center of the vessel rather than towards the wall. A typical suitable fluid 4 and the preferred one of this invention is water.

Figure 2 illustrates the utility of the liner of this invention. In Figure 2 the air-sensitive material contained within flexible liner 2 has been substantially withdrawn and it may be seen that flexible liner 2 has collapsed vertically so that it occupies a much lesser volume than when it is filled thereby eliminating the need for venting as the vessel is emptied. It may also be seen that the circumferential inflated segments of liner 2 cause it to have lateral strength, so that it does not collapse forming a light fluid bubble at the top of vessel 1 with drawolf pipe 5 pinched off by the pressure of the heavy fluid laterally collapsing liner 2. The lateral structural strength of inflated segments 3 not only causes this flexible liner 2 to collapse only in a vertical direction but they cause the flat segments of the liner between the inflated segments to neatly fold in an inwardly direction without creasing, so that the liner collapses in a regular manner without the tearing or weakening effect due to random creasing as hereinbefore described.

The flexible liner of this invention may be of any suitable flexible material. It should have sufiicient structural strength to withstand tearing when filled and it, of course, must be fluid tight and inert to both the contained fluid and the surrounding liquid. Suitable materials for use are flexible plastics, rubber, fabric or treated fabric, etc. The inflated segments are preferably made of the same material as the liner but may be made of different material and may be mechanically attached to the liner or constructed as an integral part thereof. The inflated segments may be inflated with any suitable fluid such as air, nitrogen, methane, hydrogen, carbon dioxide, helium, etc. The inflated segments may also be inflated with a liquid when it is desired to adjust the buoyancy of these segments to minimize the strain on the flexible liner. Therefore, when storing oil the inflated segments may contain gasoline or naphtha as the inflating fluid which will reduce the buoyancy of the liner to minimize the tensile strain upon it and at the same time maintain it rigid in a. horizontal direction. The inflated segments may contain light solid volume-occupying material such as Fiberglas, foam rubber when such is desired so that rigidity may be imparted to the liner without using compressed fluid in these segments.

I claim as my invention:

1. A storage vessel for air-sensitive fluids comprising a rigid shell having a horizontal bottom wall and a vertical side wall portion, a closed, fluid-tight container within the shell having a bottom wall secured to the bottom wall of the shell, a top closure wall and a flexible side wall portion connecting between its top and bottom walls to permit the container to collapse in the lower portion of said shell, said side wall portion of the container being spaced from the vertical side wall portion of the shell and being provided with vertically spaced, inflated horisaid closed container through the bottom walls of the container and said shell. 7

2. The storage vessel of claim 1 further characterized in that said shell contains a liquid in the space between the side Wall portions of said container and shell and above the top closure Wall of the container.

References Cited in the file of this patent UNITED STATES PATENTS Doelle Feb. 10, 1891 McDonald July 7, 1891 Babb June 15, 1937 Field Feb. 15, 1949 Spiegelhalter Dec. 22, 1953

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US446164 *Nov 10, 1890Feb 10, 1891 Marie doelle
US455429 *Jul 7, 1891 Gkohuk niswton mcdonald
US2084236 *Jan 6, 1937Jun 15, 1937Donald Babb JohnPortable reservoir
US2461537 *Oct 10, 1944Feb 15, 1949Shell DevFloating roof storage tank
US2663448 *Dec 23, 1950Dec 22, 1953Gen ElectricInsulating structure and method of assembling
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2924350 *Apr 23, 1957Feb 9, 1960Greer David MStorage tanks for liquids
US2947147 *Dec 20, 1955Aug 2, 1960Exxon Research Engineering CoUnderground storage reservoir for light hydrocarbons in semipermeable rock
US2977018 *Mar 4, 1960Mar 28, 1961Frye Filmore OUnderwater fuel storage
US3060484 *Sep 11, 1958Oct 30, 1962Hoover CoFloor scrubber
US3112845 *Nov 25, 1960Dec 3, 1963Frederick BryantBulk fluid transport
US3189231 *Jan 16, 1963Jun 15, 1965Fmc CorpAerosol dispenser with sponge follower and method of making same
US3299645 *Jan 2, 1964Jan 24, 1967Ocean SystemsUnderwater capsule
US3517616 *Dec 19, 1967Jun 30, 1970Atlas Chem IndAxially expandable and contractable container
US3570705 *May 14, 1968Mar 16, 1971Yazdani Mohamed RCargo containers
US3658205 *Nov 12, 1970Apr 25, 1972Kassravi M R YCargo containers
US3707937 *Apr 23, 1971Jan 2, 1973Liles HAnti-pollution ballast container
US3847309 *Oct 10, 1966Nov 12, 1974Thiokol Chemical CorpRolling diaphragm construction
US4213545 *Sep 20, 1978Jul 22, 1980Textron, Inc.Expanding bellows for expulsion tank
US4641760 *Nov 18, 1985Feb 10, 1987Don Fell LimitedInflatable bags
US4881666 *Jan 19, 1988Nov 21, 1989Robert TullmanVariable volume container
US4902430 *Jan 30, 1989Feb 20, 1990The United States Of America As Represented By The Secretary Of CommerceMethod for cleaning certain estuaries, harbors, and lakes
US5076471 *May 7, 1990Dec 31, 1991Fabricated Metals, Inc.Bulk material container having a flexible liner with a follower
US5339989 *Sep 23, 1991Aug 23, 1994Fabricated Metals, Inc.Bulk material containing having a flexible liner with a follower
US5913451 *Nov 18, 1997Jun 22, 1999Madison; KevinFuel tank assembly for volatile fuel
US6527002 *Mar 16, 1999Mar 4, 2003Istvan SzakalyApparatus and method for use with a container for storing a substance
US20090242566 *Jul 23, 2007Oct 1, 2009Witheridge Anthony JMulti-Product Tank
US20090314790 *Jan 10, 2007Dec 24, 2009Erik Jeroen EenkhoornInflatable element for internal use in the container of a transport or storage device; method for inflating the element
US20110259845 *Jul 30, 2009Oct 27, 2011Boehringer Ingelheim International GmbhPackage in the form of a bottle comprising a cushioning means disposed therein
DE102013219072A1Sep 23, 2013Mar 26, 2015Wacker Chemie AgVerwendung von flexiblen Behältern zur Lagerung von Flüssigkeiten
WO1989006626A1 *Jan 18, 1989Jul 27, 1989Robert TullmanVariable volume container
WO2000050319A1 *Feb 26, 1999Aug 31, 2000Kevin MadisonFuel tank assembly for volatile fuel
WO2008014203A1 *Jul 23, 2007Jan 31, 2008Bp Corporation North America Inc.Multi-product tank
Classifications
U.S. Classification220/567.2, 114/74.00A, 383/3, 222/386.5, 220/578, 48/178, 405/55, 62/50.2, 220/721
International ClassificationB65D88/62, B65D88/00
Cooperative ClassificationB65D88/62
European ClassificationB65D88/62