US4049048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finned tube bundle heat exchanger
Assignee: LONG MANUFACTURING Ltd A CORP OF CANADA
•
Filing: 1975-12-19
•
Granted: 1977-09-20
•
Expires: 1995-12-19
Abstract
Abstract A finned tube bundle heat exchanger utilized for heat transfer between a pair of countercurrent circulating liquids, such as for an oil cooler, wherein a bundle of tubes for the flow of one liquid therethrough pass through spaced openings in a plurality of fins or plates which are in heat transfer contact therewith. The fins are provided with a plurality of slits extending over a substantial portion of the fin surface to provide fluid flow directing openings and/or act to interrupt the fluid boundary layer on the surface of each fin and enhance the heat transfer characteristics of the finned tube bundle.
Inventors
- 👤 Harry W. T. Leedham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:59
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/22; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; F28F1/325; F28F2009/222; F28F2009/226; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/401; Y10S165/416; Y10S165/417
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
166 words
A heat exchanger comprising an outer elongated shell having a central passage extending therethrough, a pair of header plates having first fluid conduit means associated therewith, a plurality of tubes within said shell and extending longitudinally thereof with their ends sealed within apertures in said header plates, said tubes being in communication with said first conduit means, a plurality of fins stacked on said tubes between the header plates and generally conformably received within said shell, each fin having a plurality of openings defined by annular flanges extending from one surface of each fin receiving the tubes therethrough and a plurality of slits therein providing for liquid flow therethrough and generally axially along the tubes, said fins being stacked with the flanges of one fin abutting the opposite surface of the next adjacent fin to provide for spacing between adjacent fins, and second fluid conduit means associated with said shell for communication thereinto for fluid contact with the fins and the outer surfaces of said tubes.
Claim 2
Dependent Claim
166 words
A heat exchanger comprising an outer elongated shell having a central passage extending therethrough, a pair of header plates having first fluid conduit means associated therewith, a plurality of tubes within said shell and extending longitudinally thereof with their ends sealed within apertures in said header plates, said tubes being in communication with said first conduit means, a plurality of fins stacked on said tubes between the header plates and generally conformably received within said shell, each fin having a plurality of openings defined by annular flanges extending from one surface of each fin receiving the tubes therethrough and a plurality of slits therein providing for liquid flow therethrough and generally axially along the tubes, said fins being stacked with the flanges of one fin abutting the opposite surface of the next adjacent fin to provide for spacing between adjacent fins, and second fluid conduit means associated with said shell for communication thereinto for fluid contact with the fins and the outer surfaces of said tubes.
Claim 3
Dependent Claim
54 words
A heat exchanger as set forth in claim 1, wherein each fin is a circular disc formed of a material having a high heat conductivity and adapted to be conformably received in the central passage in the shell so that all liquid flow around the tubes will be through the slits in the fins.
Claim 4
Dependent Claim
43 words
A heat exchanger as set forth in claim 1, in which said openings in the fins are arranged in parallel rows and said slits are arranged in rows parallel to and between said rows of openings, said slits defining angularly disposed louvres therebetween.
Claim 5
Dependent Claim
26 words
A heat exchanger as set forth in claim 3, in which said louvres extend from both surfaces of each fin into the spacing between adjacent fins.
Claim 6
Dependent Claim
63 words
A heat exchanger as set forth in claim 1, wherein said first fluid conduit means includes a pair of end plates sealingly engaging the opposite ends of said shell, each end plate having a distribution chamber communicating with the ends of the tubes in the adjacent header plate, and a fluid conduit formed in the end plate and communicating with its respective chamber.
Claim 7
Dependent Claim
44 words
A heat exchanger as set forth in claim 1, wherein said second fluid conduit means includes a pair of radially extending fluid conduits integral with said shell adjacent the ends thereof, said conduits communicating with said shell at locations inside of said header plates.
Claim 8
Dependent Claim
30 words
A heat exchanger as set forth in claim 6, in which said fins are spaced from each header plate to provide a chamber generally aligned with each radial fluid conduit.
Claim 9
Dependent Claim
51 words
A heat exchanger as set forth in claim 4 in which all of the louvres on each fin are oriented in the same angular direction, and each fin on the tube bundle is positioned so that all of the louvres on all of the fins are disposed in the same direction.
Claim 10
Dependent Claim
57 words
A heat exchanger as set forth in claim 4, in which all of the louvres on each fin are oriented in the same angular direction, and alternate fins on the tube bundle are rotated through 180° so that the louvres on one fin are angularly disposed in a direction opposite to the louvres in an adjacent fin.
Claim 11
Dependent Claim
57 words
A heat exchanger as set forth in claim 4, including baffle plates interposed at spaced intervals in the stack of fins, each baffle plate being imperforate except for openings receiving said tubes and having a cut-away portion, the cut-away portions of the baffle plates being alternately arranged to provide a sinuous flow of fluid around said tubes.
Claim 12
Dependent Claim
99 words
A heat exchanger as set forth in claim 1, wherein each fin is a disc having diametrically opposite cut-away portions, said openings in the fins are arranged in rows and said slits are arranged in rows between the rows of openings, and baffle plates interposed at spaced intervals in the stack of fins, each baffle plate being imperforate except for openings receiving said tubes and having a cut-away portion, the cut-away portions of the baffle plates being alternately arranged in axial alignment with the cut-away portions of the fins to provide a sinuous flow of fluid around said tubes.
Claim 13
Dependent Claim
47 words
A heat exchanger as set forth in claim 11, including one or more rigidifying tubes extending between said header plates in the spaces resulting from the cut-away portions of the fins and passing through openings in the portions of the baffle plates extending into said last-mentioned spaces.
Claim 14
Dependent Claim
21 words
A heat exchanger as set forth in claim 12, in which said fins are closely stacked adjacent to said header plates.
Claim 15
Dependent Claim
43 words
A heat exchanger as set forth in claim 2, in which said openings in the fins are arranged in parallel rows and said slits are arranged in rows parallel to and between said rows of openings, said slits defining angularly disposed louvres therebetween.
Claim 16
Dependent Claim
22 words
A heat exchanger as set forth in claim 14, in which said louvres on each fin are oriented in the same direction.
Claim 17
Dependent Claim
33 words
A heat exchanger as set forth in claim 15, in which all of the fins are positioned on the tubes so that all of said louvres are angularly disposed in the same direction.
Claim 18
Dependent Claim
37 words
A heat exchanger as set forth in claim 15, in which alternate fins are rotated 180° so that the louvres of one fin are angularly disposed in the opposite direction to the louvres in an adjacent fin.
Claim 19
Dependent Claim
30 words
A heat exchanger as set forth in claim 14, in which said fins are spaced from each header plate and are closely stacked about the tubes intermediate the header plates.
Claim 20
Dependent Claim
45 words
A heat exchanger as set forth in claim 10, in which each fin is a circular disc adapted to be conformably received in the central passage in the shell so that all liquid flow around the tubes will be through the slits in the fins.
Claim 21
Dependent Claim
30 words
A heat exchanger as set forth in claim 19, in which said fins are spaced from each header plate to provide a chamber at each end of the stacked fins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |