US3734178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: DEFAWES ETS THOMAS
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Filing: 1971-05-26
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Granted: 1973-05-22
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Expires: 1991-05-26
Abstract
Abstract A heat exchanger, such as a boiler, comprising a nest of tubes travelled by a heat-bearing fluid, said tubes being branched on a starting header and on a return header of fluid, as well as a heat source for heating said fluid, this nest of tubes comprising ribbed elements, the ribs of which form communicating channels for the fluid and comprised of panels applied the one against the other and each presenting a ribbed profile, wherein the ribs of the panels forming each of the elements extend as serpentines, the ribs of one panel being offset with respect to the ribs of the other panel.
Inventors
- 👤 E Soudron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:05
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/38; F28; F28F; F28F3/00; F28F3/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A heat exchanger, such as a boiler, comprising a nest of tubes for conducting a heat-exchange fluid, said tubes being branched on a starting header and on a return header of fluid, said nest of tubes being formed by elements having hollow ribs which form communicating channels for the fluid, said elements comprising ribbed panel placed the one against the other, the ribs of each panel including straight, parallel and equidistant portions, connected two by two through a curved portion so that the ribs are serpentine in shape, the straight portions of the ribs of one panel being offset, by a distance substantially equal to half the distance separating the axes of the straight portions of two successive ribs, with respect to the corresponding straight portions of the ribs of the other panel, so as to form separate channels, the channels of one of the panels communicating with the channels of the other panel only at the location of said curved portions.
Claim 2
Dependent Claim
162 words
A heat exchanger, such as a boiler, comprising a nest of tubes for conducting a heat-exchange fluid, said tubes being branched on a starting header and on a return header of fluid, said nest of tubes being formed by elements having hollow ribs which form communicating channels for the fluid, said elements comprising ribbed panel placed the one against the other, the ribs of each panel including straight, parallel and equidistant portions, connected two by two through a curved portion so that the ribs are serpentine in shape, the straight portions of the ribs of one panel being offset, by a distance substantially equal to half the distance separating the axes of the straight portions of two successive ribs, with respect to the corresponding straight portions of the ribs of the other panel, so as to form separate channels, the channels of one of the panels communicating with the channels of the other panel only at the location of said curved portions.
Claim 3
Dependent Claim
60 words
A heat exchanger as in claim 1, wherein each of said ribbed elements is formed from only one panel folded in its median portion in a parallel direction to one of its edges, the two halves of the panel being folded back the one on the other and fixed the one to the other so as to form said channels.
Claim 4
Dependent Claim
28 words
A heat exchanger as in claim 1, wherein each of said ribbed elements is formed of a central plate and troughs fixed on both sides of said plate.
Claim 5
Dependent Claim
29 words
A heat exchanger as claimed in claim 3, wherein the edge of said central plate is bent and folded back on the plate so as to form a channel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |