US3960204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low void volume regenerator for Vuilleumier cryogenic cooler
Assignee: United States Department of the Army
•
Filing: 1974-02-12
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Granted: 1976-06-01
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Expires: 1994-02-12
Abstract
Abstract A low void volume regenerator for use in a Vuilleumier Cooler made by bong alternating thin layers of copper and teflon and cutting radial slots into the regenerator.
Inventors
- 👤 Stuart B. Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:38
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044; F02G1/0445; F02G2250/00; F02G2250/18; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/042
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
A low void volume regenerator for use in a Vuilleumier cooler and comprising: a plurality of joined disc-like members forming an elongated body; said disc-like members being made of heat insulating and heat conducting materials and being arranged to promote heat conduction radially of the regenerator body and to inhibit heat conduction longitudinally of the regenerator body; and a plurality of substantially radial slots in said regenerator body providing a low void volume for the passage of gas longitudinally therethrough.
Claim 2
Dependent Claim
80 words
A low void volume regenerator for use in a Vuilleumier cooler and comprising: a plurality of joined disc-like members forming an elongated body; said disc-like members being made of heat insulating and heat conducting materials and being arranged to promote heat conduction radially of the regenerator body and to inhibit heat conduction longitudinally of the regenerator body; and a plurality of substantially radial slots in said regenerator body providing a low void volume for the passage of gas longitudinally therethrough.
Claim 3
Dependent Claim
23 words
The low void volume regenerator as in claim 1 wherein said slots are arranged symmetrically about the longitudinal axis of the regenerator body.
Claim 4
Dependent Claim
40 words
The low void volume regenerator as in claim 2 wherein said disc-like members are placed in alternating heat insulating and heat conducting sequence and wherein said heat conducting members are approximately three times the thickness of said heat insulating members.
Claim 5
Dependent Claim
19 words
The low void volume regenerator as in claim 3 wherein said slots form linear longitudinal paths through the regenerator.
Claim 6
Dependent Claim
19 words
The low void volume regenerator as in claim 3 wherein said slots form non-linear longitudinal paths through the regenerator.
Claim 7
Dependent Claim
15 words
The low void volume regenerator as in claim 5, wherein said non-linear paths are helical.
Claim 8
Dependent Claim
32 words
The low void volume regenerator as in claim 3 wherein said heat conducting material is copper and wherein said heat insulating material is selected from the group consisting of teflon and mica.
References Cited (Backward Citations)
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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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |