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US3148512A
Expired / Lapsed
US
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Refrigeration apparatus
Assignee: Arthur D Little Inc
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Filing: 1963-05-15
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Granted: 1964-09-15
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Expires: 1983-05-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Hoffman
- 👤 Walter H Hogan
- 👤 Robert W Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:11
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25B2309/00; F25B2309/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A REFRIGERATOR, COMPRISING IN COMBINATION (A) A FLUID-TIGHT HOUSING OF CIRCULAR CROSS-SECTION DECREASING FROM END TO END; (B) DISPLACER MEANS MOVABLE WITHIN SAID HOUSING AND DEFINING FLUID VOLUMES VARIABLE WITH THEIR MOVEMENT WITHIN SAID HOUSING, SAID DISPLACER MEANS BEING A SERIES OF CONNECTED CYLINDRICAL DISPLACERS OF DECREASING DIAMETERS AND OF SUCH DIMENSIONS AS TO DEFINE A FLUID PASSAGE BETWEEN SAID DISPLACERS AND THE INTERNAL WALL OF SAID HOUSING; (C) FLUID-PERMEABLE THERMAL REGENERATOR MEANS OCCUPYING THAT PORTION OF SAID FLUID PASSAGE DEFINED BY THE UPPER PORTIONS OF SAID DISPLACERS AND SAID HOUSING; (D) FLUID-PERMEABLE HEAT STATION MEANS THERMALLY BONDED TO SAID INTERNAL WALL AND OCCUPYING THE REMAINING PORTION OF SAID FLUID PASSAGE WHEREBY THE FLOW OF FLUID BETWEEN SAID FLUID VOLUMES IS EXCLUSIVELY THROUGH SAID THERMAL REGENERATOR MEANS AND SAID HEAT STATION MEANS; (E) MEANS EXTERNAL OF SAID HOUSING SUBSTANTIALLY CORRESPONDING IN LOCATION TO SAID HEAT STATION MEANS FOR DELIVERING REFRIGERATION TO A LOAD; AND (F) VALVE-CONTROLLED HIGH-PRESSURE FLUID DELIVERY MEANS AND LOW-PRESSURE FLUID RECEIVING MEANS IN COMMUNICATION WITH SAID FLUID VOLUMES.
Claim 2
Dependent Claim
171 words
A REFRIGERATOR, COMPRISING IN COMBINATION (A) A FLUID-TIGHT HOUSING OF CIRCULAR CROSS-SECTION DECREASING FROM END TO END; (B) DISPLACER MEANS MOVABLE WITHIN SAID HOUSING AND DEFINING FLUID VOLUMES VARIABLE WITH THEIR MOVEMENT WITHIN SAID HOUSING, SAID DISPLACER MEANS BEING A SERIES OF CONNECTED CYLINDRICAL DISPLACERS OF DECREASING DIAMETERS AND OF SUCH DIMENSIONS AS TO DEFINE A FLUID PASSAGE BETWEEN SAID DISPLACERS AND THE INTERNAL WALL OF SAID HOUSING; (C) FLUID-PERMEABLE THERMAL REGENERATOR MEANS OCCUPYING THAT PORTION OF SAID FLUID PASSAGE DEFINED BY THE UPPER PORTIONS OF SAID DISPLACERS AND SAID HOUSING; (D) FLUID-PERMEABLE HEAT STATION MEANS THERMALLY BONDED TO SAID INTERNAL WALL AND OCCUPYING THE REMAINING PORTION OF SAID FLUID PASSAGE WHEREBY THE FLOW OF FLUID BETWEEN SAID FLUID VOLUMES IS EXCLUSIVELY THROUGH SAID THERMAL REGENERATOR MEANS AND SAID HEAT STATION MEANS; (E) MEANS EXTERNAL OF SAID HOUSING SUBSTANTIALLY CORRESPONDING IN LOCATION TO SAID HEAT STATION MEANS FOR DELIVERING REFRIGERATION TO A LOAD; AND (F) VALVE-CONTROLLED HIGH-PRESSURE FLUID DELIVERY MEANS AND LOW-PRESSURE FLUID RECEIVING MEANS IN COMMUNICATION WITH SAID FLUID VOLUMES.
References Cited (Backward Citations)
US2567454A
Cited
US2907175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |