US3074244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature cryogenic engine
Assignee: MALAKER LABORATORIES Inc
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Filing: 1961-04-12
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Granted: 1963-01-22
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Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Malaker
- 👤 John G Daunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:29
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A MINIATURE CRYOGENIC ENGINE OF THE CHARACTER DESCRIBED AND DESIGNED TO OPERATE ACCORDING TO A MODIFIED STIRLING CYCLE WHEREIN A MOTOR AND ITS SHAFT DRIVE A COMPRESSOR PISTON AND AN EXPANDER PISTON OPERATING ON A WORKING GAS, COMPRISING A HOUSING HAVING A WALL ATTACHED IN GAS-SEALING RELATION TO A MOTOR, A CRANKSHAFT HAVING ONE END MOUNTED WITHIN AND AT THE END OF SAID HOUSING AND THE OTHER END AFFIXED TO THE MOTOR SHAFT, TWO ADJACENTLYDISPOSED CRANKS ARRANGED ON SAID CRANKSHAFT IN ABOUT A 90* PHASE RELATIONSHIP, CONNECTING RODS CONNECTING SAID CRANKS A COMPRESSOR PISTON CONNECTED TO ONE OF SAID RODS, AN EXPANDER PISTON CONNECTED TO THE OTHER OF SAID RODS, A FINNED COMPRESSION CYLINDER PROJECTING AT A RIGHT ANGLE FROM SAID HOUSING WALL AND DESIGNED TO ACCOMMODATE SAID COMPRESSION PISTON, CONDUCTION MEANS FOR CONDUCTING COMPRESSION HEAT FROM SAID COMPRESSOR CYLINDER TO ITS CYLINDER WALL, A FINNED EXPANDER CYLINDER ALSO PROJECTING FROM SAID HOUSING WALL IN VERTICALLY PARALLEL RELATION TO SAID COMPRESSION CYLINDER AND DESIGNED TO ACCOMMODATE SAID EXPANDER PISTON, CONDUCTION MEANS FOR THERMAL TRANSFER OF LOW TEMPERATURE FROM SAID EXPANDER CYLINDER TO ITS CYLINDER WALL, A REGENERATOR ATTACHED TO THE HEAD OF SAID
Claim 2
Dependent Claim
193 words
A MINIATURE CRYOGENIC ENGINE OF THE CHARACTER DESCRIBED AND DESIGNED TO OPERATE ACCORDING TO A MODIFIED STIRLING CYCLE WHEREIN A MOTOR AND ITS SHAFT DRIVE A COMPRESSOR PISTON AND AN EXPANDER PISTON OPERATING ON A WORKING GAS, COMPRISING A HOUSING HAVING A WALL ATTACHED IN GAS-SEALING RELATION TO A MOTOR, A CRANKSHAFT HAVING ONE END MOUNTED WITHIN AND AT THE END OF SAID HOUSING AND THE OTHER END AFFIXED TO THE MOTOR SHAFT, TWO ADJACENTLYDISPOSED CRANKS ARRANGED ON SAID CRANKSHAFT IN ABOUT A 90* PHASE RELATIONSHIP, CONNECTING RODS CONNECTING SAID CRANKS A COMPRESSOR PISTON CONNECTED TO ONE OF SAID RODS, AN EXPANDER PISTON CONNECTED TO THE OTHER OF SAID RODS, A FINNED COMPRESSION CYLINDER PROJECTING AT A RIGHT ANGLE FROM SAID HOUSING WALL AND DESIGNED TO ACCOMMODATE SAID COMPRESSION PISTON, CONDUCTION MEANS FOR CONDUCTING COMPRESSION HEAT FROM SAID COMPRESSOR CYLINDER TO ITS CYLINDER WALL, A FINNED EXPANDER CYLINDER ALSO PROJECTING FROM SAID HOUSING WALL IN VERTICALLY PARALLEL RELATION TO SAID COMPRESSION CYLINDER AND DESIGNED TO ACCOMMODATE SAID EXPANDER PISTON, CONDUCTION MEANS FOR THERMAL TRANSFER OF LOW TEMPERATURE FROM SAID EXPANDER CYLINDER TO ITS CYLINDER WALL, A REGENERATOR ATTACHED TO THE HEAD OF SAID
References Cited (Backward Citations)
US2750765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |