Patent US3669320A successfully refreshed from Google Patents.
US3669320A
Expired / Lapsed
US
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Reserve liquid storage and dispensing device
Assignee: ESB Inc
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Filing: 1970-10-13
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Granted: 1972-06-13
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Expires: 1990-10-13
Abstract
Abstract A reserve liquid storage and dispensing device is described in which liquid stored in a container is dispensed by the motion of a piston. The piston is a tank containing high pressure gas, the gas supplying the energy required to cause the piston to move.
Inventors
- 👤 Thomas H Purcell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:05
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
A reserve liquid storage and dispensing device which comprises: a. a tubulor liquid storage reservoir; b. a gas storage tank located within the liquid storage reservoir and adjacent a first end thereof, an external circumference of the gas storage tank mating with and similar and equal in size to the internal cross section of the liquid storage reservoir and slidably mounted therein; c. a shut-off valve mounted on the gas storage tank and facing the first end wall of the liquid storage reservoir, the shutoff valve when open providing access for the gas within the gas storage tank to the portion of the liquid storage reservoir bounded by the first end wall of the reservoir and an end portion of the gas storage tank; d. a valve operating means extending through the first end wall of the liquid storage reservoir and engaging the opening means of the shut-off valve; and, e. a liquid outlet formed in the second end wall of the liquid storage reservoir.
Claim 2
Dependent Claim
165 words
A reserve liquid storage and dispensing device which comprises: a. a tubulor liquid storage reservoir; b. a gas storage tank located within the liquid storage reservoir and adjacent a first end thereof, an external circumference of the gas storage tank mating with and similar and equal in size to the internal cross section of the liquid storage reservoir and slidably mounted therein; c. a shut-off valve mounted on the gas storage tank and facing the first end wall of the liquid storage reservoir, the shutoff valve when open providing access for the gas within the gas storage tank to the portion of the liquid storage reservoir bounded by the first end wall of the reservoir and an end portion of the gas storage tank; d. a valve operating means extending through the first end wall of the liquid storage reservoir and engaging the opening means of the shut-off valve; and, e. a liquid outlet formed in the second end wall of the liquid storage reservoir.
Claim 3
Dependent Claim
141 words
A reserve liquid storage and dispensing device which comprises: a. a cylindrical liquid storage reservoir having a first and second end wall; b. a gas storage tank located within the liquid storage reservoir having an external diameter equal to the internal diameter of the liquid storage reservoir and slideably mounted therein; c. a flexible tube located within the liquid storage reservoir connecting the interior of the gas storage tank to a first opening formed in a first end wall of the liquid storage reservoir; d. an operating valve external to the liquid storage reservoir tubularly connected between the first opening in the first end wall of the liquid storage reservoir and a second opening formed through the first end wall of the liquid storage reservoir; and e. an outlet formed in the second end wall of the cylindrical liquid storage reservoir.
Claim 4
Dependent Claim
141 words
A reserve liquid storage and dispensing device which comprises: a. a cylindrical liquid storage reservoir having a first and second end wall; b. a gas storage tank located within the liquid storage reservoir having an external diameter equal to the internal diameter of the liquid storage reservoir and slideably mounted therein; c. a flexible tube located within the liquid storage reservoir connecting the interior of the gas storage tank to a first opening formed in a first end wall of the liquid storage reservoir; d. an operating valve external to the liquid storage reservoir tubularly connected between the first opening in the first end wall of the liquid storage reservoir and a second opening formed through the first end wall of the liquid storage reservoir; and e. an outlet formed in the second end wall of the cylindrical liquid storage reservoir.
Claim 5
Dependent Claim
29 words
A device as defined in claim 2 in which the gas storage tank is spherical in shape, and the second end wall of the liquid reservoir is a hemisphere.
Claim 6
Dependent Claim
33 words
A device as defined in claim 2 in which a gas pressure sensing device is located on the tubular connection between the first end wall of the liquid reservoir and the operating valve.
References Cited (Backward Citations)
US2925937A
Cited
US3405845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |