US3727682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers and the method of making the same
Assignee: Peerless of America Inc
•
Filing: 1970-02-24
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Granted: 1973-04-17
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Expires: 1990-02-24
Abstract
Abstract A tubular heat exchanger having spine-type fins formed integrally from the wall thereof and disposed therearound, with the fins cut from ribs extending longitudinally of the heat exchanger, and a method of manufacture which includes rotary movement between a tool and an elongated, ribbed tubular member relative to the longitudinal axis of the latter.
Inventors
- 👤 S Pasternak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:44
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
A heat exchanger element comprising a. a tubular member having an elongated wall, b. a plurality of outwardly projecting ribs integral with and extending longitudinally of said wall in laterally spaced relation, and c. a series of spines projecting outwardly from the outer longitudinal edges of said ribs, d. said spines 1. having base portions integral with said ribs, 2. being spaced apart along the length of said ribs, and 3. being longitudinally curved transversely to the length of said ribs.
Claim 2
Dependent Claim
81 words
A heat exchanger element comprising a. a tubular member having an elongated wall, b. a plurality of outwardly projecting ribs integral with and extending longitudinally of said wall in laterally spaced relation, and c. a series of spines projecting outwardly from the outer longitudinal edges of said ribs, d. said spines 1. having base portions integral with said ribs, 2. being spaced apart along the length of said ribs, and 3. being longitudinally curved transversely to the length of said ribs.
Claim 3
Dependent Claim
10 words
being spaced apart along the length of said ribs, and
Claim 4
Dependent Claim
10 words
being spaced apart along the length of said ribs, and
Claim 5
Dependent Claim
21 words
A heat exchanger element as defined in claim 1, and in which a. said spines are twisted around their longitudinal axes.
Claim 6
Dependent Claim
20 words
in said rows being spaced apart laterally around said wall in other rows which are substantially parallel to each other,
Claim 7
Dependent Claim
20 words
in said rows being spaced apart laterally around said wall in other rows which are substantially parallel to each other,
Claim 8
Dependent Claim
16 words
being substantially rectangular in transverse cross section and having a width greater than their thickness, and
Claim 9
Dependent Claim
16 words
being substantially rectangular in transverse cross section and having a width greater than their thickness, and
Claim 10
Dependent Claim
30 words
A heat exchanger element as defined in claim 1, and in which a. said spines are spaced from each other, laterally of the length of said wall, along a helix.
Claim 11
Dependent Claim
10 words
being longitudinally curved transversely to the length of said ribs.
Claim 12
Dependent Claim
10 words
being longitudinally curved transversely to the length of said ribs.
Claim 13
Dependent Claim
22 words
A heat exchanger element as defined in claim 1, and in which a. said ribs extend along said wall in a helix.
Claim 14
Dependent Claim
26 words
being bent transversely to the length of said wall in a direction transverse to the thickness of said cross section of the base of said spines.
Claim 15
Dependent Claim
26 words
being bent transversely to the length of said wall in a direction transverse to the thickness of said cross section of the base of said spines.
Claim 16
Dependent Claim
42 words
A heat exchanger as defined in claim 1, and in which a. said base portions are wider in a direction transverse to the length of said respective ribs to which they are integral than in the direction longitudinally of said respective ribs.
Claim 17
Dependent Claim
26 words
A heat exchanger comprising a. a tubular member having an elongated wall, and b. a plurality of spines projecting outwardly from said wall, c. said spines
Claim 18
Dependent Claim
26 words
A heat exchanger comprising a. a tubular member having an elongated wall, and b. a plurality of spines projecting outwardly from said wall, c. said spines
Claim 19
Dependent Claim
34 words
A heat exchanger as defined in claim 6, and in which a. the bends in said spines transverse to the length of said walls are curves extending substantially the full length of said spines.
References Cited (Backward Citations)
US955399A
Cited
US3343596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |