US3596495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer device and method of making
Assignee: Modine Manufacturing Co
•
Filing: 1969-04-01
•
Granted: 1971-08-03
•
Expires: 1989-04-01
Abstract
Abstract A heat transfer device and a method of making the same in which the device comprises a heat transfer tube having a longitudinal bore for flow of fluid therethrough, spaced heat transfer internal fins within the tube and distortions in the wall of the tube adjacent the fins that not only distorts the wall but also deflects the fins in the region of the distortions to increase internal fluid turbulence and thereby promote better heat transfer.
Inventors
- 👤 Homer D Huggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:18
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0477; F28D1/0478; F28F; F28F1/00; F28F1/02; F28F1/022; F28F1/08; F28F1/10; F28D21/00; F28D2021/0019; F28D2021/008; F28D2021/0089; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49384
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
84 words
The method of making a heat transfer device; comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins of preselected height with free peaks; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency, said distorting being in a direction parallel to the fin height to distort the fins laterally at said peaks.
Claim 2
Independent Claim
84 words
The method of making a heat transfer device; comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins of preselected height with free peaks; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency, said distorting being in a direction parallel to the fin height to distort the fins laterally at said peaks.
Claim 3
Independent Claim
89 words
The method of making a heat transfer device, comprising: providing a heat transfer tube of oval cross section with opposing flat sides having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins located at said sides and substantially parallel to each other; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency, said distorting providing a series of undulations normal to said flat sides.
Claim 4
Independent Claim
89 words
The method of making a heat transfer device, comprising: providing a heat transfer tube of oval cross section with opposing flat sides having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins located at said sides and substantially parallel to each other; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency, said distorting providing a series of undulations normal to said flat sides.
Claim 5
Independent Claim
69 words
The method of making a heat transfer device, comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins by providing internally extending spaced dimples in the area of said fins of a depth insufficient to contact the opposite wall.
Claim 6
Independent Claim
69 words
The method of making a heat transfer device, comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins; and distorting said tube inwardly from exteriorly thereof in the region of said fins to distort the internal fins by providing internally extending spaced dimples in the area of said fins of a depth insufficient to contact the opposite wall.
Claim 7
Dependent Claim
78 words
A heat transfer device, comprising: a heat transfer fluid flow tube having an internal bore defined by a wall; a heat transfer internal fin extending inwardly of said tube wall for contact by said fluid; and inwardly extending distortion means in the tube wall adjacent said fin that both distorts said wall and deflects said fin in the region of said distortion means, thereby improving the heat transfer between the flowing fluid, the fin and the tube wall.
Claim 8
Dependent Claim
78 words
A heat transfer device, comprising: a heat transfer fluid flow tube having an internal bore defined by a wall; a heat transfer internal fin extending inwardly of said tube wall for contact by said fluid; and inwardly extending distortion means in the tube wall adjacent said fin that both distorts said wall and deflects said fin in the region of said distortion means, thereby improving the heat transfer between the flowing fluid, the fin and the tube wall.
Claim 9
Dependent Claim
45 words
The device of claim 4 wherein said tube is of oval cross section with opposite walls extending between opposite tube edges, and there are provided a plurality of said fins extending between said walls and extending from one wall but short of the opposite wall.
Claim 10
Dependent Claim
20 words
The device of claim 5 wherein said distortion means comprise a wave undulation at right angles to said opposite walls.
Claim 11
Dependent Claim
20 words
The device of claim 5 wherein said distortion means comprises inward dimples in said walls each coinciding with a fin.
Claim 12
Independent Claim
70 words
The method of making a heat transfer device, comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins; and distorting said tube laterally inwardly from exteriorly thereof in the region of said fins to provide a permanent inward set in said tube and thereby distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency.
Claim 13
Independent Claim
70 words
The method of making a heat transfer device, comprising: providing a heat transfer tube having a longitudinal bore for flow of fluid therethrough and spaced heat transfer internal fins; and distorting said tube laterally inwardly from exteriorly thereof in the region of said fins to provide a permanent inward set in said tube and thereby distort the internal fins laterally, thereby increasing fluid turbulence and promoting better heat transfer efficiency.
Claim 14
Dependent Claim
31 words
The method of claim 2 wherein said distorting is to the degree that the internal fin edges adjacent the internally concave portions of the undulations are puckered to provide turbulence undulations.
Claim 15
Dependent Claim
37 words
The method Of claim 2 wherein certain of said internal fins extend from one of the sidewalls to the other and other fins extend from one wall but terminate in an edge short of the other wall.
Claim 16
Dependent Claim
33 words
The method of claim 3 wherein said tube is of oval cross section with opposing flat sides and said internal fins are located at said sides and are substantially parallel to each other.
Claim 17
Dependent Claim
32 words
The method of claim 11 wherein certain of said dimpled distorted fins extend between opposite sidewalls of the tube and others extend from one wall but terminate short of the opposite wall.
Claim 18
Dependent Claim
30 words
The device of claim 4 wherein there are a plurality of said fins that extend inwardly of a wall of the tube and comprise free peaks distorted laterally in undulations.
Claim 19
Dependent Claim
28 words
The device of claim 4 wherein said distortions comprise internally extending spaced dimples in the area of said fins of a depth insufficient to contact the opposite wall.
Claim 20
Dependent Claim
33 words
The device of claim 4 wherein said tube is of oval cross section with opposing flat sides and said internal fins are located at said sides and are substantially parallel to each other.
Claim 21
Dependent Claim
31 words
The device of claim 4 wherein certain of said dimple-distorted fins extend between opposite sidewalls of the tube and others extend from one wall but terminate short of the opposite wall.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |