US3886639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a finned heat exchanger
Assignee: Peerless of America Inc
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Filing: 1975-02-01
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Granted: 1975-06-03
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Expires: 1995-02-01
Abstract
Abstract A heat exchanger embodying an elongated tubular member with integral fins, in the form of spines, projecting outwardly therefrom in rows, with the transversely adjacent fins in adjacent rows being disposed different distances from an end of the tubular member.
Inventors
- 👤 Stephen F Pasternak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
B; B21; B21D; B21D31/00; B21D53/00; B21D53/02; B21J; B21J5/00; B21J5/06; B21J5/068; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
The method of making heat transfer element, comprising a. forming an elongated tubular member having a wall portion with spaced elongated external ribs extending longitudinally of said tubular member, and b. successively, from one end portion of said tubular member toward the other end portion thereof, 1. cutting fins from a plurality of said ribs simultaneously, and by means of a cutting tool having cutting surfaces aligned with respective ones of said ribs and having alternate ones of said cutting surfaces being offset longitudinally of said ribs from the immediately tRansversely adjacent cutting surfaces, and c. to thereby 1. afford a''. elongated base portions 1''. extending across said ribs transversely to the length thereof and 2''. directly attached to said ribs, and b''. free end portions projecting outwardly therefrom, and 2. dispose said free end portions of said fins in position wherein said free end portions of said fins on alternate ones of said rows are disposed a different distance from one end of said tubular member than the free end portions on immediately transversely adjacent fins in the other said rows.
Claim 2
Independent Claim
182 words
The method of making heat transfer element, comprising a. forming an elongated tubular member having a wall portion with spaced elongated external ribs extending longitudinally of said tubular member, and b. successively, from one end portion of said tubular member toward the other end portion thereof, 1. cutting fins from a plurality of said ribs simultaneously, and by means of a cutting tool having cutting surfaces aligned with respective ones of said ribs and having alternate ones of said cutting surfaces being offset longitudinally of said ribs from the immediately tRansversely adjacent cutting surfaces, and c. to thereby 1. afford a''. elongated base portions 1''. extending across said ribs transversely to the length thereof and 2''. directly attached to said ribs, and b''. free end portions projecting outwardly therefrom, and 2. dispose said free end portions of said fins in position wherein said free end portions of said fins on alternate ones of said rows are disposed a different distance from one end of said tubular member than the free end portions on immediately transversely adjacent fins in the other said rows.
Claim 3
Independent Claim
46 words
The method of making heat transfer element, comprising a. forming an elongated tubular member having a wall portion with spaced elongated external ribs extending longitudinally of said tubular member, and b. successively, from one end portion of said tubular member toward the other end portion thereof,
Claim 4
Independent Claim
46 words
The method of making heat transfer element, comprising a. forming an elongated tubular member having a wall portion with spaced elongated external ribs extending longitudinally of said tubular member, and b. successively, from one end portion of said tubular member toward the other end portion thereof,
Claim 5
Dependent Claim
51 words
cutting fins from a plurality of said ribs simultaneously, and by means of a cutting tool having cutting surfaces aligned with respective ones of said ribs and having alternate ones of said cutting surfaces being offset longitudinally of said ribs from the immediately tRansversely adjacent cutting surfaces, and c. to thereby
Claim 6
Dependent Claim
51 words
cutting fins from a plurality of said ribs simultaneously, and by means of a cutting tool having cutting surfaces aligned with respective ones of said ribs and having alternate ones of said cutting surfaces being offset longitudinally of said ribs from the immediately tRansversely adjacent cutting surfaces, and c. to thereby
Claim 7
Dependent Claim
31 words
afford a''. elongated base portions 1''. extending across said ribs transversely to the length thereof and 2''. directly attached to said ribs, and b''. free end portions projecting outwardly therefrom, and
Claim 8
Dependent Claim
31 words
afford a''. elongated base portions 1''. extending across said ribs transversely to the length thereof and 2''. directly attached to said ribs, and b''. free end portions projecting outwardly therefrom, and
Claim 9
Dependent Claim
51 words
dispose said free end portions of said fins in position wherein said free end portions of said fins on alternate ones of said rows are disposed a different distance from one end of said tubular member than the free end portions on immediately transversely adjacent fins in the other said rows.
Claim 10
Dependent Claim
51 words
dispose said free end portions of said fins in position wherein said free end portions of said fins on alternate ones of said rows are disposed a different distance from one end of said tubular member than the free end portions on immediately transversely adjacent fins in the other said rows.
Claim 11
Dependent Claim
32 words
The method of making a heat transfer element as defined in claim 1, and in which a. the immediately transversely adjacent fins on adjacent rows are formed with longitudinally aligned base portions.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |