Patent US4522032A successfully refreshed from Google Patents.
US4522032A
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Stirling-cycle refrigerator
Assignee: Aisin Corp
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Filing: 1983-08-29
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Granted: 1985-06-11
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Expires: 2003-08-29
Abstract
Abstract A Stirling-cycle refrigerator comprises a plurality of Stirling-cycle refrigerator units each having a displacer defining an expansion chamber, a piston defining a compression chamber, and a circuit including a heater and a cooler and interconnecting the expansion chamber and the compression chamber, and a heat exchanger shared by the circuits and disposed between the coolers and the heaters for effecting heat exchange between working gases in the circuits. The heat exchanger may comprise a countercurrent heat exchanger, and the Stirling-cycle refrigerator units are operated in cycles which are 180° out of phase with each other.
Inventors
- 👤 Kazuaki Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:28
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25B2309/00; F25B2309/14; F25B2309/1422
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A Stirling-cycle refrigerator comprising: (a) a plurality of Stirling-cycle refrigerator units, each having: (1) a displacer defining an expansion chamber; (2) a piston defining a compression chamber; and (3) a circuit including a heater and a cooler and interconnecting said expansion chamber and said compression chamber; (b) a countercurrent heat exchanger shared by said circuits and disposed between said coolers and said heaters for effecting heat exchange between working gases in said circuits; and (c) a pair of regenerators connected in said circuits, respectively, in series with said countercurrent heat exchanger.
Claim 2
Dependent Claim
91 words
A Stirling-cycle refrigerator comprising: (a) a plurality of Stirling-cycle refrigerator units, each having: (1) a displacer defining an expansion chamber; (2) a piston defining a compression chamber; and (3) a circuit including a heater and a cooler and interconnecting said expansion chamber and said compression chamber; (b) a countercurrent heat exchanger shared by said circuits and disposed between said coolers and said heaters for effecting heat exchange between working gases in said circuits; and (c) a pair of regenerators connected in said circuits, respectively, in series with said countercurrent heat exchanger.
Claim 3
Dependent Claim
36 words
A Stirling-cycle refrigerator mechanism according to claim 1, further comprising a drive mechanism coupled to said displacer and said piston for operating said Stirling-cycle refrigerator units in cycles which are out of phase with each other.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |