Patent US3566897A successfully refreshed from Google Patents.
US3566897A
Expired / Lapsed
US
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Controlling the flow of fluid coolant
Assignee: Hawker Siddeley Dynamics Ltd
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Filing: 1969-05-06
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Granted: 1971-03-02
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Expires: 1989-05-06
Abstract
Abstract Apparatus for transferring a readily evaporable liquid, by gas pressure, from a first container to a second container, wherein a dip tube monitors the level of the liquid in the second container and the pressure signal in the dip tube is transmitted to a fluidic control device which controls the application of gas pressure to the liquid in the first container. The fluidic control device also receives a second control signal from the tube conveying the liquid from the first to the second container, and receives its main gas supply form the same source as that which supplies the gas pressure to the first container.
Inventors
- 👤 David Thomas Collier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/008; F17; F17C; F17C13/00; F17C13/02; F17C13/021; F17C2227/00; F17C2227/03; F17C2227/0337; F17C2227/0341; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/07; F17C2250/072; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/731
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
Apparatus whereby a readily evaporable liquid is discharged under pressure from a first container into a second container, it being arranged that at a preset level the liquid in the second container closes the end of a control tube through which flows a gaseous fluid, whereby said gaseous fluid is increased in pressure and this increase in pressure operates switching means to release the pressure from the first container.
Claim 2
Dependent Claim
69 words
Apparatus whereby a readily evaporable liquid is discharged under pressure from a first container into a second container, it being arranged that at a preset level the liquid in the second container closes the end of a control tube through which flows a gaseous fluid, whereby said gaseous fluid is increased in pressure and this increase in pressure operates switching means to release the pressure from the first container.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1, wherein the open end of the control tube is at least partly closed with an absorbent material.
Claim 4
Dependent Claim
25 words
Apparatus according to claim 1, comprising a fluid logic system to bring about the switching in response to increase of pressure in the control tube.
Claim 5
Dependent Claim
43 words
Apparatus according to claim 3, wherein the working fluid employed in the fluid logic system, and the gas in the control tube, are the same as the gas resulting from vaporization of the liquid being transferred from the first to the second container.
Claim 6
Dependent Claim
38 words
Apparatus according to claim 3, wherein the pressure in the control tube is applied as an input control signal to a pure fluid amplifier the output from which in turn controls venting of gas from the first container.
Claim 7
Dependent Claim
27 words
Apparatus according to claim 5, wherein a gas supply for the control tube, and a supply for the fluid amplifier, are both derived from a third container.
Claim 8
Dependent Claim
34 words
Apparatus according to claim 4, wherein there is applied, as a further control signal input to the fluid amplifier, a proportion of the pressure in a transfer pipe between the first and second containers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |