Patent US3742567A successfully refreshed from Google Patents.
US3742567A
Expired / Lapsed
US
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Method of making a heat transfer device
Assignee: Sulzer AG
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Filing: 1970-09-25
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Granted: 1973-07-03
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Expires: 1990-09-25
Abstract
Abstract The heat transfer system includes a plurality of wound tube coils fixed within the holes of at least three plates disposed in a radiating axial manner from the axis of the system. The tube coils are wound helically or spirally and are fixed at three points about the holes through which they pass.
Inventors
- 👤 W Kaelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:04
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/02; F28D7/024; B; B21; B21D; B21D53/00; B21D53/02; B21D53/027; F28D7/04; F28F; F28F9/00; F28F9/007; F28F9/013; F28F9/0131; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49362; Y10T29/49826; Y10T29/49838
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A method of making a heat transfer system having a plurality of wound tube coils fixed in a plurality of plates having fully encompassed apertures in the plane of the plates comprising the steps of mounting the radiating plates in a secured radiating manner with the plates disposed in spaced circumferential relation, bending a straight tube to impart a curvature therein, coiling the curved tube about itself to form a tube coil, and inserting the tube coil perpendicularly into the plates into and through the apertures of the apertured plates.
Claim 2
Independent Claim
90 words
A method of making a heat transfer system having a plurality of wound tube coils fixed in a plurality of plates having fully encompassed apertures in the plane of the plates comprising the steps of mounting the radiating plates in a secured radiating manner with the plates disposed in spaced circumferential relation, bending a straight tube to impart a curvature therein, coiling the curved tube about itself to form a tube coil, and inserting the tube coil perpendicularly into the plates into and through the apertures of the apertured plates.
Claim 3
Dependent Claim
33 words
A method as set forth in claim 1 wherein the curved tube is coiled into a helical configuration and the helical tube coil is inserted into the apertured plates in a helical manner.
Claim 4
Dependent Claim
18 words
A method as set forth in claim 1 wherein said steps of coiling and inserting are performed simultaneously.
References Cited (Backward Citations)
US1704409A
Cited
US2162152A
Cited
US2204614A
Cited
AT157156B
Cited
GB520071A
Cited
US2980404A
Cited
US3080916A
Cited
US3274755A
Cited
GB920836A
Cited
GB914083A
Cited
US3286767A
Cited
US3545534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |