US3643312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making finned tubing
Assignee: Orbit Manufacturing Co
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Filing: 1970-06-18
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Granted: 1972-02-22
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Expires: 1990-06-18
Abstract
Abstract A method is disclosed for making a finned tube heat exchanger wherein each of a plurality of platelike fins is mounted on an elongated heat conductor by means of a series of interference fits provided between each fin and the conductor. The interference fits are effected by forming a noncircular aperture in the fins, forming a slightly smaller noncircular crosssectional shape on the conductor, aligning the conductor with the apertures, displacing the conductor longitudinally through the apertures, and, after the fins are properly positioned on the conductor, locking them in place by effecting relative rotation through a portion of a turn to cause a series of interference fits to be established between each fin and the conductor.
Inventors
- 👤 Charles S Shriver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:44
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/50; F; F24; F24H; F24H3/00; F24H3/002; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A method for mounting skirted fins onto an elongated heat conductor comprising the steps of: forming a skirt around an aperture in each of said fins with a series of substantially straight portions alternating with a like series of arcuate portions to provide said skirt with a noncircular shape, forming on said conductor a slightly smaller noncircular shape normal to the longitudinal axis of said conductor with straight and arcuate portions corresponding to similar portions on said skirts, aligning said noncircular shape on the conductor with said noncircular skirts on the fins, displacing said conductor axially relative to said fins to position the fins thereon, and relatively rotating the fins through a predetermined angle on said axis to thereby securely mount the fins on the conductor, said relative rotation disposing the straight portions on said conductor in spaced confronting relation with the arcuate portions on said fins to effect an interference fit between said skirts and the arcuate portions of said conductor by deforming the skirts.
Claim 2
Independent Claim
166 words
A method for mounting skirted fins onto an elongated heat conductor comprising the steps of: forming a skirt around an aperture in each of said fins with a series of substantially straight portions alternating with a like series of arcuate portions to provide said skirt with a noncircular shape, forming on said conductor a slightly smaller noncircular shape normal to the longitudinal axis of said conductor with straight and arcuate portions corresponding to similar portions on said skirts, aligning said noncircular shape on the conductor with said noncircular skirts on the fins, displacing said conductor axially relative to said fins to position the fins thereon, and relatively rotating the fins through a predetermined angle on said axis to thereby securely mount the fins on the conductor, said relative rotation disposing the straight portions on said conductor in spaced confronting relation with the arcuate portions on said fins to effect an interference fit between said skirts and the arcuate portions of said conductor by deforming the skirts.
Claim 3
Dependent Claim
41 words
A method in accordance with claim 1 wherein said substantially straight portions are formed on said fins a spaced distance from said axis, said distance being less than the distance between said axis and the arcuate portions formed on said conductor.
Claim 4
Dependent Claim
34 words
A method in accordance with claim 1 wherein a peripheral flange is formed on each skirt and said straight portions are formed on said skirt between said flange and the plane of said fin.
Claim 5
Dependent Claim
24 words
A method in accordance with claim 1 wherein said noncircular shape on the conductor is formed by advancing said conductor longitudinally between opposed rollers.
Claim 6
Dependent Claim
19 words
A method in accordance with claim 1 including the step of lubricating said conductor before displacing said fins thereonto.
Claim 7
Dependent Claim
27 words
A method in accordance with claim 1 wherein said noncircular shapes of said conductor and said skirt mate with limited clearance therebetween prior to said relative rotation.
Claim 8
Dependent Claim
12 words
A method in accordance with claim 6 wherein said shapes are identical.
References Cited (Backward Citations)
US3020382A
Cited
US3526958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |