US3353371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual tube regenerative cryostat
Assignee: General Dynamics Corp
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Filing: 1966-06-23
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Granted: 1967-11-21
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Expires: 1986-06-23
Abstract
No abstract record available.
Inventors
- 👤 Carl A Hammons
- 👤 Elroy B Kalinke
- 👤 Raymond R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25B; F25B9/00; F25B9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A CRYOGENIC DEVICE COMPRISING: A HOUSING HAVING AN OPENING IN AT LEAST ONE END THEREOF, A COILED TUBING DEFINING A HEAT EXCHANGER POSITIONED AT LEAST PARTIALLY IN SAID HOUSING, SAID COILED TUBING BEING WITHOUT COOLING FINS AND HAVING ONE END TERMINATING NEAR ONE END OF SAID HOUSING AND THE OTHER END OF SAID TUBING TERMINATING IN A FLUID SUPPLY CONDUIT, UNFINNED TUBING MEANS POSITIONED SUBSTANTIALLY CENTRALLY WITHIN ONLY A PORTION OF SAID COILED TUBING, ONE END OF SAID TUBING MEANS TERMINATING IN SAID FLUID SUPPLY CONDUIT, AND THE OTHER END OF SAID TUBING MEANS TERMINATING A SUBSTANTIAL DISTANCE FROM SAID ONE END OF SAID COILED TUBING AND ADAPTED TO DISCHARGE FLUID FROM SAID FLUID SUPPLY CONDUIT INTO A CENTRAL PORTION OF SAID COIL TUBING, WHEREBY ADDITIONAL TURBULENCE AT THE CENTRAL PORTION OF SAID COILED TUBING IS PRODUCED WHICH ACTS TO CHANNEL FLUID EXHAUSTING FROM SAID COILED TUBING AND FROM SAID UNFINNED TUBING MEANS OVER SAID COILED TUBING THUS PROVIDING MORE EFFICIENT HEAT TRANSFER.
Claim 2
Dependent Claim
163 words
A CRYOGENIC DEVICE COMPRISING: A HOUSING HAVING AN OPENING IN AT LEAST ONE END THEREOF, A COILED TUBING DEFINING A HEAT EXCHANGER POSITIONED AT LEAST PARTIALLY IN SAID HOUSING, SAID COILED TUBING BEING WITHOUT COOLING FINS AND HAVING ONE END TERMINATING NEAR ONE END OF SAID HOUSING AND THE OTHER END OF SAID TUBING TERMINATING IN A FLUID SUPPLY CONDUIT, UNFINNED TUBING MEANS POSITIONED SUBSTANTIALLY CENTRALLY WITHIN ONLY A PORTION OF SAID COILED TUBING, ONE END OF SAID TUBING MEANS TERMINATING IN SAID FLUID SUPPLY CONDUIT, AND THE OTHER END OF SAID TUBING MEANS TERMINATING A SUBSTANTIAL DISTANCE FROM SAID ONE END OF SAID COILED TUBING AND ADAPTED TO DISCHARGE FLUID FROM SAID FLUID SUPPLY CONDUIT INTO A CENTRAL PORTION OF SAID COIL TUBING, WHEREBY ADDITIONAL TURBULENCE AT THE CENTRAL PORTION OF SAID COILED TUBING IS PRODUCED WHICH ACTS TO CHANNEL FLUID EXHAUSTING FROM SAID COILED TUBING AND FROM SAID UNFINNED TUBING MEANS OVER SAID COILED TUBING THUS PROVIDING MORE EFFICIENT HEAT TRANSFER.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |