US3876119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverting liner pressurized tank
Assignee: Individual
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Filing: 1973-02-26
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Granted: 1975-04-08
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Expires: 1993-02-26
Abstract
Abstract This disclosure describes a tank for holding water or other liquid under a selected range of pressure. It comprises a tank with a top opening and means to close and seal the top, with conduit means penetrating the top for the entry and discharge of liquid from the tank. The tank is lined with an impervious flexible cylindrical liner which is closed at the bottom and open at the top and is fastened by sealing over the top opening of the tank. Air or other gas is injected into the tank below the inverting liner so that the liquid is maintained at a pressure equal to that of the gas below the liner. The liner is of larger diameter than the tank, and is held in intimate contact with the tank by the internal pressure of the liquid inside the liner when in the extended position and by the gas pressure when the liner is in the inverted position. In one version a condensible gas such as Freon, of a selected composition is injected into the tank below the level of the liner instead of air or other noncondensible gas. Freon, being a gas condensible at ambient temperatures, can provide a pressure which is substantially constant depending on the temperature, and can vary in volume in accordance with the space provided below the water.
Inventors
- 👤 James E Lamkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/54; B65D88/58; B65D88/60; B65D88/62
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
159 words
An inverting liner pressurized liquid tank comprising: a. a pressure tight tank open at the top and closure means to close said opening, an inner wall inside said tank sealed to said tank at its top edge and providing an annular space between said inner wall and said tank; b. a tubular flexible, compressible, impermeable inverting liner closed off with a transverse wall at the bottom, and open at the top, adapted while subjected to internal pressure to snugly fit against the inside surface of said tank and said inner wall, the open top of said liner sealed around said top opening of said tank; c. conduit means through said closure means for admitting a flow of water into and out of said liner; and d. means to inject a condensible gas, of a selected pressure versus temperature relation, to provide a selected pressure range over a selected temperature range, into said tank below the bottom of said liner.
Claim 2
Dependent Claim
159 words
An inverting liner pressurized liquid tank comprising: a. a pressure tight tank open at the top and closure means to close said opening, an inner wall inside said tank sealed to said tank at its top edge and providing an annular space between said inner wall and said tank; b. a tubular flexible, compressible, impermeable inverting liner closed off with a transverse wall at the bottom, and open at the top, adapted while subjected to internal pressure to snugly fit against the inside surface of said tank and said inner wall, the open top of said liner sealed around said top opening of said tank; c. conduit means through said closure means for admitting a flow of water into and out of said liner; and d. means to inject a condensible gas, of a selected pressure versus temperature relation, to provide a selected pressure range over a selected temperature range, into said tank below the bottom of said liner.
Claim 3
Dependent Claim
13 words
The tank as in claim 1 in which said condensible gas if Freon.
Claim 4
Dependent Claim
17 words
The tank as in claim 2 in which said Freon is Freon 12 intermixed with Freon 21.
Claim 5
Dependent Claim
17 words
The tank as in claim 2 in which said Freon is Freon 12 intermixed with Freon 22.
Claim 6
Dependent Claim
43 words
The tank as in claim 1 in which the diameter of said liner is approximately 10 percent greater than the internal diameter of said tank and said wall whereby under internal pressure said liner will be compressed and will be supported from collapsing.
Claim 7
Dependent Claim
23 words
The tank as in claim 1 in which said liner is of a thickness in the range of 0.030 inches to 0.060 inches.
Claim 8
Dependent Claim
16 words
The tank as in claim 1 in which said liner is made of rubber like material.
Claim 9
Dependent Claim
15 words
The tank as in claim 1 in which said liner is made of acrylonitrile rubber.
Claim 10
Dependent Claim
171 words
An inverting liner pressurized liquid tank comprising: a. a pressure tight tank open at the top and closure means to close said opening, an inner wall inside said tank sealed to said tank at its top edge and providing an annular space between said inner wall and said tank; b. a tubular, flexible, compressible, impermeable inverting liner closed off with a transverse wall at the bottom, and open at the top, the diameter of said liner larger in diameter than said tank, and adapted while subjected to internal pressure to snugly fit against the inside surface of said tank and said inner wall, the open top of said liner sealed around said top opening of said tank; c. conduit means through said closure means for admitting a flow of liquid into and out of said liner; and d. means to inject a selected gas, of a selected pressure versus temperature relation, to provide a selected pressure range over a selected temperature range, into said tank below the bottom of said liner.
Claim 11
Dependent Claim
171 words
An inverting liner pressurized liquid tank comprising: a. a pressure tight tank open at the top and closure means to close said opening, an inner wall inside said tank sealed to said tank at its top edge and providing an annular space between said inner wall and said tank; b. a tubular, flexible, compressible, impermeable inverting liner closed off with a transverse wall at the bottom, and open at the top, the diameter of said liner larger in diameter than said tank, and adapted while subjected to internal pressure to snugly fit against the inside surface of said tank and said inner wall, the open top of said liner sealed around said top opening of said tank; c. conduit means through said closure means for admitting a flow of liquid into and out of said liner; and d. means to inject a selected gas, of a selected pressure versus temperature relation, to provide a selected pressure range over a selected temperature range, into said tank below the bottom of said liner.
Claim 12
Dependent Claim
43 words
The tank as in claim 9 in which the diameter of said liner is approximately 10 percent greater than the internal diameter of said tank and said wall, whereby under internal pressure said liner will be compressed and will be supported from collapsing.
Claim 13
Dependent Claim
15 words
The tank as in claim 9 in which said selected gas is a noncondensible gas.
Claim 14
Dependent Claim
47 words
The tank as in claim 9 in which said selected gas is a mixture of selected proportion of two compatible condensible gases each having a different pressure versus temperature relation such that the binary mixture of the selected components will have the desired pressure versus temperature relation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |