Patent US5056317A successfully refreshed from Google Patents.
US5056317A
Expired / Lapsed
US
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Miniature integral Stirling cryocooler
Assignee: Bank of America NA
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Filing: 1990-03-22
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Granted: 1991-10-15
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Expires: 2010-03-22
Abstract
Abstract An integral cryogenic refrigerator, or cryocooler, for cooling an electronic device to cryogenic temperatures. The cryocooler has a minimum number of moving parts. A lightweight flexure links a compressor piston to a coupler which is also connected to a regenerator via a lightweight vane. An electric motor with an offset shaft drives the coupler via a bearing through a circular path to impart properly timed motion to the compressor piston and regenerator. This arrangement minimizes the weight and number of moving parts, resulting in maximum efficiency and operating life. Vibration transmission is minimized by mounting the device to be cooled on an end cap having a raised castlated rim. A reusable access port allows the cryocooler to be readily recharged.
Inventors
- 👤 Norman B. Stetson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:21
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25D; F25D19/00; F25D19/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A cryocooler including a cold well having a rim extending therefrom, a regenerator arranged to reciprocate inside the cold well, a piston arranged to reciprocate inside a compression cylinder, and means for connecting the regenerator and the piston, wherein the rim of the cold well is proximal to the free end of the regenerator and receives a device to be cooled by the cryocooler in such a manner that the device only contacts the rim.
Claim 2
Dependent Claim
75 words
A cryocooler including a cold well having a rim extending therefrom, a regenerator arranged to reciprocate inside the cold well, a piston arranged to reciprocate inside a compression cylinder, and means for connecting the regenerator and the piston, wherein the rim of the cold well is proximal to the free end of the regenerator and receives a device to be cooled by the cryocooler in such a manner that the device only contacts the rim.
Claim 3
Dependent Claim
16 words
A cryocooler as in claim 1, wherein the rim includes a plurality of spaced foot portions.
Claim 4
Dependent Claim
14 words
A cryocooler as in claim 1, wherein the bottom portion includes an end cap.
Claim 5
Dependent Claim
16 words
A cryocooler as in claim 3, wherein the rim includes a plurality of spaced foot portions.
Claim 6
Dependent Claim
21 words
A cryocooler as in claim 3, wherein the end cap is braised to form the bottom portion of the cold well.
Claim 7
Dependent Claim
25 words
A cryocooler as in claim 3, wherein the cold well is cylindrical in shape and the rim forms an anulus on the bottom portion thereof.
Claim 8
Dependent Claim
16 words
A cryocooler as in claim 6, wherein the rim includes a plurality of spaced foot portions.
Claim 9
Dependent Claim
25 words
A cryocooler as in claim 7, wherein a notch is formed around the outer periphery of the end cap where it engages the cold well.
Claim 10
Dependent Claim
25 words
A cryocooler as in claim 1, wherein the cold well is cylindrical in shape and the rim forms an annulus on the bottom portion thereof.
Claim 11
Dependent Claim
16 words
A cryocooler as in claim 9, wherein the rim includes a plurality of spaced foot portions.
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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) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |