US3668757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a heat exchanger
Assignee: GENERAL IMPACT EXTRUSIONS Manufacturing Ltd
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Filing: 1970-07-07
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Granted: 1972-06-13
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Expires: 1990-07-07
Abstract
Abstract An improved method of forming a heat exchanger including the step of forming a plurality of heating tubes integrally with an end plate and by an impact extrusion process and connecting the interior passages of the tubes in a heat exchanger circuit.
Inventors
- 👤 Otto E Rieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/26; B; B21; B21C; B21C23/00; B21C23/02; B21C23/18; B21D; B21D53/00; B21D53/02; B21D53/08; B21D53/085; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/05316; F28D1/05325; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/16; F28F9/02; F28F9/04; F28F9/16; F28F2255/00; F28F2255/16; Y; Y10; Y10S; Y10S29/00; Y10S29/047; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T29/49377; Y10T29/49378; Y10T29/49385
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug With a plurality of passages therein corresponding to the number of tubes required, b. extruding said slug by impact extrusion to form a plurality of tubes integrally connected at one end by a base and spaced apart from one another over the remainder of their length and c. connecting the interior passages of said tubes in a heat exchanger circuit to permit fluid to pass through said tubes in heat exchange relationship with the exterior of said tubes.
Claim 2
Independent Claim
93 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug With a plurality of passages therein corresponding to the number of tubes required, b. extruding said slug by impact extrusion to form a plurality of tubes integrally connected at one end by a base and spaced apart from one another over the remainder of their length and c. connecting the interior passages of said tubes in a heat exchanger circuit to permit fluid to pass through said tubes in heat exchange relationship with the exterior of said tubes.
Claim 3
Independent Claim
121 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug with a plurality of passages therein corresponding to the number of tubes required, b. extruding said slug by impact extrusion to form a plurality of tubes integrally connected at one end by a base and spaced apart from one another over the remainder of their length, said passages opening through said tubes and through said base to dispose an open end of each passage on opposite sides of said base, and c. interconnecting adjacent ends of said tubes to provide a heat exchanger flow path for fluid to permit fluid to pass through said tubes in heat exchanging relationship with the exterior surfaces of said tubes.
Claim 4
Independent Claim
121 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug with a plurality of passages therein corresponding to the number of tubes required, b. extruding said slug by impact extrusion to form a plurality of tubes integrally connected at one end by a base and spaced apart from one another over the remainder of their length, said passages opening through said tubes and through said base to dispose an open end of each passage on opposite sides of said base, and c. interconnecting adjacent ends of said tubes to provide a heat exchanger flow path for fluid to permit fluid to pass through said tubes in heat exchanging relationship with the exterior surfaces of said tubes.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1 wherein said tubes are formed with longitudinally extending radially projecting heat exchange fins in the impact extrusion step.
Claim 6
Independent Claim
135 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug having an inner face, an outer face and a peripheral edge with a plurality of passages spaced inwardly from the peripheral edge and extending between the inner face and the outer face, b. extruding said slug by impact extrusion to form a plurality of tubes which are integrally connected at one end by a base formed from the unextruded portion of the slug and spaced apart over the remainder of their length, the interior passages of said tubes being an extension of the passages formed in said slug, and c. connecting the interior passages of said tubes in a heat exchanger circuit to permit fluid to pass through said tubes in heat exchange relationship with the exterior of said tubes.
Claim 7
Independent Claim
135 words
A method of forming a heat exchanger comprising the steps of: a. forming a slug having an inner face, an outer face and a peripheral edge with a plurality of passages spaced inwardly from the peripheral edge and extending between the inner face and the outer face, b. extruding said slug by impact extrusion to form a plurality of tubes which are integrally connected at one end by a base formed from the unextruded portion of the slug and spaced apart over the remainder of their length, the interior passages of said tubes being an extension of the passages formed in said slug, and c. connecting the interior passages of said tubes in a heat exchanger circuit to permit fluid to pass through said tubes in heat exchange relationship with the exterior of said tubes.
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |