Patent US3972453A successfully refreshed from Google Patents.
Patent US3296808A successfully refreshed from Google Patents.
US3296808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat energized refrigerator
Assignee: Motors Liquidation Co
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Filing: 1965-08-25
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Granted: 1967-01-10
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Expires: 1985-08-25
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Malik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044; F02G1/0445; F02G1/0435; F25; F25B; F25B9/00; F25B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A HEAT ENERGIZED REFRIGERATOR OR THE LIKE HAVING A PAIR OF DISPLACERS RECIPROCABLE WITHIN A CYLINDER TO PROVIDE THREE VARIABLE VOLUME CHAMBERS WHICH ARE INTERCONNECTED THROUGH REGENERATIVE HEAT EXCHANGERS TO BECOME PROGRESSIVELY COOLER REGIONS WHEN HEAT IS ADDED TO ONE OF THE CHAMBERS AND A CONSTANT VOLUME OF FLUID FLOWS BETWEEN THE VARIABLE VOLUME CHAMBERS THROUGH THE REGENERATORS AT VARYING PRESSURES, THE IMPROVEMENT COMPRISING: A FIXED CENTRAL STUD EXTENDING INTO THE CYLINDER, SAID STUD HAVING AN ENLARGED HOLLOW UPPER PORTION, A FIRST HOLLOW DISPLACER HAVING A PAIR OF SPACED FACES SLIDABLY MOUNTED ON SAID STUD, ONE OF SAID FACES MOVABLY ENGAGING SAID UPPER PORTION, SAID ONE FACE BEING OF SMALLER AREA THAN SAID OTHER FACE, A STEM ON SAID FIRST DISPLACER SLIDABLY MOUNTED IN SAID HOLLOW UPPER PORTION, A COMPARTMENT DEFINED BY SAID HOLLOW DIFFERENTIAL DISPLACER AND STUD, MEANS TO MAINTAIN THE PRESSURE IN SAID COMPARTMENT SUBSTANTIALLY AT THE MEAN PRESSURE OF THE SYSTEM,
Claim 2
Dependent Claim
155 words
IN A HEAT ENERGIZED REFRIGERATOR OR THE LIKE HAVING A PAIR OF DISPLACERS RECIPROCABLE WITHIN A CYLINDER TO PROVIDE THREE VARIABLE VOLUME CHAMBERS WHICH ARE INTERCONNECTED THROUGH REGENERATIVE HEAT EXCHANGERS TO BECOME PROGRESSIVELY COOLER REGIONS WHEN HEAT IS ADDED TO ONE OF THE CHAMBERS AND A CONSTANT VOLUME OF FLUID FLOWS BETWEEN THE VARIABLE VOLUME CHAMBERS THROUGH THE REGENERATORS AT VARYING PRESSURES, THE IMPROVEMENT COMPRISING: A FIXED CENTRAL STUD EXTENDING INTO THE CYLINDER, SAID STUD HAVING AN ENLARGED HOLLOW UPPER PORTION, A FIRST HOLLOW DISPLACER HAVING A PAIR OF SPACED FACES SLIDABLY MOUNTED ON SAID STUD, ONE OF SAID FACES MOVABLY ENGAGING SAID UPPER PORTION, SAID ONE FACE BEING OF SMALLER AREA THAN SAID OTHER FACE, A STEM ON SAID FIRST DISPLACER SLIDABLY MOUNTED IN SAID HOLLOW UPPER PORTION, A COMPARTMENT DEFINED BY SAID HOLLOW DIFFERENTIAL DISPLACER AND STUD, MEANS TO MAINTAIN THE PRESSURE IN SAID COMPARTMENT SUBSTANTIALLY AT THE MEAN PRESSURE OF THE SYSTEM,
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |