US3220201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic refrigerator operating on the stirling cycle
Assignee: Arthur D Little Inc
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Filing: 1965-01-25
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Granted: 1965-11-30
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Theodore P Heuchling
- 👤 Arthur A Fowle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:08
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25B2309/00; F25B2309/001; F25B2309/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A REFRIGERATION APPARATUS, COMPRISING IN COMBINATION (A) AT LEAST ONE COMPRESSOR PISTON RECIPROCALLY OPERABLE WITHIN A COMPRESSOR CYLINDER THEREBY TO DEFINE A COMPRESSOR CHAMBER OF VARIABLE VOLUME; (B) AN EXPANDER PISTON RECIPROCALLY OPERABLE WITHIN AN EXPANSION CYLINDER THEREBY TO DEFINE AT LEAST ONE EXPANSION CHAMBER OF VARIABLE VOLUME; (C) A FLUID PATH BETWEEN SAID COMPRESSOR CHAMBER AND SAID EXPANSION CHAMBER INCLUDING THEREIN OUT-OF-CONTACT HEAT-EXCHANGE MEANS AND THERMAL STORAGE MEANS; (D) LINEAR ELECTRIC ACTUATING MEANS CONNECTED TO SAID COMPRESSOR PISTON AND SAID EXPANDER PISTON AND ADAPTED TO EFFECT THE DIRECT RECIPROCATION OF SAID PISTONS IN A PREDETERMINED PHASE RELATIONSHIP; AND (E) ENERGY STORING MEANS ADAPTED TO BALANCE THE INERTIA FORCES ASSOCIATED WITH THE RECIPROCATING OF THE MASSES INVOLVED IN EFFECTING RECIPROCATING OF SAID PISTONS.
Claim 2
Dependent Claim
123 words
A REFRIGERATION APPARATUS, COMPRISING IN COMBINATION (A) AT LEAST ONE COMPRESSOR PISTON RECIPROCALLY OPERABLE WITHIN A COMPRESSOR CYLINDER THEREBY TO DEFINE A COMPRESSOR CHAMBER OF VARIABLE VOLUME; (B) AN EXPANDER PISTON RECIPROCALLY OPERABLE WITHIN AN EXPANSION CYLINDER THEREBY TO DEFINE AT LEAST ONE EXPANSION CHAMBER OF VARIABLE VOLUME; (C) A FLUID PATH BETWEEN SAID COMPRESSOR CHAMBER AND SAID EXPANSION CHAMBER INCLUDING THEREIN OUT-OF-CONTACT HEAT-EXCHANGE MEANS AND THERMAL STORAGE MEANS; (D) LINEAR ELECTRIC ACTUATING MEANS CONNECTED TO SAID COMPRESSOR PISTON AND SAID EXPANDER PISTON AND ADAPTED TO EFFECT THE DIRECT RECIPROCATION OF SAID PISTONS IN A PREDETERMINED PHASE RELATIONSHIP; AND (E) ENERGY STORING MEANS ADAPTED TO BALANCE THE INERTIA FORCES ASSOCIATED WITH THE RECIPROCATING OF THE MASSES INVOLVED IN EFFECTING RECIPROCATING OF SAID PISTONS.
References Cited (Backward Citations)
US3188821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |