US4428420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat absorbing element and method of manufacture
Assignee: Individual
•
Filing: 1981-07-16
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Granted: 1984-01-31
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Expires: 2001-07-16
Abstract
Abstract A heat absorbing element formed from a single metal strip of substantially uniform thickness, comprising a tube having a wall comprising at least a double thickness of strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of a heat transfer fluid, and a fin along the tube stretching out from the seam line, the fin comprising at least one less thickness of strip than the tube wall. A method of manufacturing such an element is also disclosed.
Inventors
- 👤 Stephen W. Blakely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:48
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/225; B21C37/154; F; F24; F24S; F24S10/00; F24S10/70; F24S10/75; F24S10/753; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A heat absorbing element formed from a single metal strip of substantially uniform thickness, said strip having longitudinal edge margins at opposite sides of the strip, said element comprising a tube having a wall comprising at least a double thickness of said strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of heat transfer fluid, and a pair of fins formed by said longitudinal edge margins extending generally axially with respect to the tube stretching out from said line of seam for collecting heat and transferring it to the tube, each axial fin comprising at least one less thickness of said strip than the tube wall.
Claim 2
Dependent Claim
114 words
A heat absorbing element formed from a single metal strip of substantially uniform thickness, said strip having longitudinal edge margins at opposite sides of the strip, said element comprising a tube having a wall comprising at least a double thickness of said strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of heat transfer fluid, and a pair of fins formed by said longitudinal edge margins extending generally axially with respect to the tube stretching out from said line of seam for collecting heat and transferring it to the tube, each axial fin comprising at least one less thickness of said strip than the tube wall.
Claim 3
Dependent Claim
23 words
A heat absorbing element as set forth in claim 1 wherein the wall of said tube comprises a triple thickness of said strip.
Claim 4
Dependent Claim
20 words
A heat absorbing element as set forth in claim 1 wherein each fin comprises a single thickness of said strip.
Claim 5
Dependent Claim
71 words
A heat absorbing element as set forth in claim 1 wherein each fin comprises an inner portion adjacent said line of seam bent into thermal contact with the outer surface of the tube at one side of the line of seam, and an outer portion extending laterally outwardly away from the tube at one side thereof, said outer portion lying in a plane extending generally axially with respect to the tube.
Claim 6
Dependent Claim
26 words
A heat absorbing element as set forth in claim 4 wherein said inner portion of the fin is bonded to the outer surface of the tube.
Claim 7
Dependent Claim
20 words
A heat absorbing element as set forth in claim 4 wherein the outer portions of said fins are generally coplanar.
Claim 8
Dependent Claim
26 words
A heat absorbing element as set forth in claim 1 wherein the two thicknesses of said strip comprising the wall of the tube are bonded together.
Claim 9
Dependent Claim
25 words
A heat absorbing element as set forth in claim 7 wherein the wall of said tube comprises three thicknesses of said metal strip bonded together.
References Cited (Backward Citations)
US2203006A
Cited
FR891592A
Cited
US3311134A
Cited
US3464402A
Cited
US3521587A
Cited
US4011856A
Cited
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Cited
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |