US3633372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer of cryogenic liquids
Assignee: Parker Hannifin Corp
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Filing: 1969-04-28
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Granted: 1972-01-11
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Expires: 1989-04-28
Abstract
Abstract This invention relates to a system which permits the storage and transfer of cryogenic fluids without losses due to handling and venting and which is characterized by reversed-cascade filling procedure. This system for transfer of a cryogenic liquid from a supply container to a receiver is characterized in that only a single fluid connection is made between the container and receiver without venting the receiver so that the receiverfilling operation may be achieved without gas or liquid loss by evaporation or overflow as by the use of a submerged and continuously primed pump.
Inventors
- 👤 Cleve C Kimmel
- 👤 John H Moll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
F; F17; F17C; F17C6/00; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0335; F17C2205/0352; F17C2205/0364; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/04; F17C2223/042; F17C2223/046; F17C2223/047; F17C2227/00; F17C2227/01; F17C2227/0121; F17C2227/0128; F17C2227/0135; F17C2227/03; F17C2227/0367; F17C2227/0388; F17C2227/0393; F17C2227/04; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/061
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
The system of claim 1 wherein said means establishing a pressure differential comprises a pump in said conduit means to establish a pressure differential for flow of liquid from said container into said receiver.
Claim 2
Dependent Claim
99 words
The system of claim 1 wherein said means establishing a pressure differential comprises a pump and drive means therefor; wherein valve means between said supply container and the portion of said conduit means downstream of said pump opens communication between said supply container and receiver in response to vapor pressure in the latter exceeding a predetermined value thus to decrease such vapor pressure; and wherein a pressure actuated interlock energizes saiD drive means in response to decrease of such vapor pressure to predetermined value thus to drive said pump for flow of liquid from said container into said receiver.
Claim 3
Dependent Claim
37 words
The system of claim 1 wherein said temperature control means comprises a heat exchanger and a sensor unit therefor through which liquid may be conducted to increase the saturated vapor pressure in said receiver to predetermined level.
Claim 4
Dependent Claim
74 words
The system of claim 1 wherein said temperature control means comprises a thermal sensor unit; a heat exchanger; and valve means operative to divert a portion of the liquid flowing in said conduit means through said heat exchanger for heating thereof and for mixing of the heated liquid with the unheated portion of the liquid; said sensor unit actuating said valve means upon decrease of vapor pressure in said receiver below a predetermined value.
Claim 5
Dependent Claim
53 words
The system of claim 1 wherein said means establishing a pressure differential comprises a heat exchanger through which a portion of the liquid from said supply container is conducted and supplied therefrom to the vapor space of said supply container thus to effect flow of liquid from said supply container into said receiver.
Claim 6
Dependent Claim
27 words
The system of claim 1 wherein said conduit means terminates in spray means operative to break up liquid as it enters the vapor space of said receiver.
Claim 7
Dependent Claim
33 words
The system of claim 1 wherein relief valve means exposed to vapor pressure in said receiver relieves vapor pressure in said receiver when it exceeds a maximum pressure greater than said predetermined level.
Claim 8
Dependent Claim
33 words
The system of claim 2 wherein check valve means in said conduit means downstream of said pump prevents reverse flow of liquid in said conduit means from said receiver into said supply container.
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |