US3593744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically controlled water storage system
Assignee: Individual
•
Filing: 1970-02-19
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Granted: 1971-07-20
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Expires: 1990-02-19
Abstract
Abstract A pneumatically controlled water storage system including a water tank having an inlet and an outlet at different water levels, and a precharged, expansible gas envelope within said tank to open and close the water outlet and the water inlet in response to changes in water pressure, and air volume control means for normally maintaining a water reservoir within said tank between maximum and minimum pressures. This invention also contemplates an air discharge valve in the top of the tank adapted to be normally closed by the pressurized gas envelope, for venting air or other gases trapped between the top of the tank and the gas envelope.
Inventors
- 👤 Henry Leo Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
E; E03; E03B; E03B11/00; E03B11/02; E03B11/04; F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/41; F15B2201/413; F15B2201/415; F15B2201/4155; Y; Y02; Y02A; Y02A20/00; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834; Y10T137/8593; Y10T137/85978
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A water storage system comprising: a. a closed water storage tank, b. a water inlet in said tank, c. a water outlet in said tank spaced from said water inlet, d. a closed expansible flexible material gas envelope within said tank, said envelope having a wall impermeable to water which when expanded conforms generally to the interior shape of said storage tank, e. said envelope having a gas inlet for charging said envelope with a gas at a predetermined internal pressure, f. said internal pressure forcing said envelope wall to expand against substantially the entire inner surface of said tank to normally close said water inlet and said waTer outlet, in the absence of water in said tank.
Claim 2
Dependent Claim
118 words
A water storage system comprising: a. a closed water storage tank, b. a water inlet in said tank, c. a water outlet in said tank spaced from said water inlet, d. a closed expansible flexible material gas envelope within said tank, said envelope having a wall impermeable to water which when expanded conforms generally to the interior shape of said storage tank, e. said envelope having a gas inlet for charging said envelope with a gas at a predetermined internal pressure, f. said internal pressure forcing said envelope wall to expand against substantially the entire inner surface of said tank to normally close said water inlet and said waTer outlet, in the absence of water in said tank.
Claim 3
Dependent Claim
52 words
The invention according to claim 1 in which said water inlet and said water outlet are spaced apart in the normal path of expansion of said gas envelope, so that as said envelope expands said water outlet is closed first, and continued expansion of said envelope will subsequently close said water inlet.
Claim 4
Dependent Claim
36 words
The invention according to claim 2 in which said tank has a top and a bottom, said inlet is adjacent the bottom of said tank and said outlet is at a higher level than said inlet.
Claim 5
Dependent Claim
42 words
The invention according to claim 3 further comprising an air discharge outlet normally being closed by said envelope wall, said air discharge outlet being opened by air trapped within said tank between the top portion of said tank and said envelope wall.
Claim 6
Dependent Claim
48 words
The invention according to claim 1 in which each of said water inlet and said water outlet comprise open ports through the wall of said tank, each of said ports being adapted to be completely closed by the expansion of corresponding portions of said envelope against said port.
Claim 7
Dependent Claim
37 words
The invention according to claim 5 in which said inlet comprises a conduit section extending through the wall of said tank, an inlet head in said conduit section, and a plurality of ports through said inlet head.
Claim 8
Dependent Claim
59 words
The invention according to claim 1 in which said water outlet comprises a conduit section extending through the wall of said tank, an outlet head and a plurality of ports through said outlet head of varying sizes, said ports being located at different levels, the size of each port varying with its level location, the highest port being largest.
Claim 9
Dependent Claim
94 words
The invention according to claim 1 in which said water inlet is in fluid communication with a water pump, and said water outlet is in fluid communication with a water distribution system, a pressure switch responsive to the water pressure within said pump and operatively connected to said pump to start said pump and operatively connected to said pump to start said pump at a predetermined minimum pressure and to stop said pump at a predetermined maximum pressure, so that said envelope closes said water outlet only at water pressures below said minimum pressure.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |