US4179911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Y and T-finned tubes and methods and apparatus for their making
Assignee: Wieland Werke AG
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Filing: 1978-07-07
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Granted: 1979-12-25
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Expires: 1998-07-07
Abstract
Abstract This invention concerns finned tubes for use in heat exchanging whereby the fins have a generally T or Y shape. There is disclosed process and apparatus for making these Y and T-finned tubes whereby a smooth tube is subjected to conventional rolling process with the ends of the fins being subsequently notched into Y-fins and, if desired, subsequently flattened into T-fins. According to other embodiments of the invention the T-fins are constructed by an apparatus including an oblique surface which contacts the conventionally constructed fins causing the fins to be flattened into a general T shape.
Inventors
- 👤 Manfred Saier
- 👤 Hans-Werner Kastner
- 👤 Robert Klockler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:21
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; B21H; B21H7/00; B21H7/18; B21H7/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49385
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
93 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins, including: support means for said tube; rolling disc means for forming a finned tube, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasing diameters rotatting about an axis of said rolling disc means; means for notching the upper surface of the formed fins.
Claim 2
Dependent Claim
93 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins, including: support means for said tube; rolling disc means for forming a finned tube, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasing diameters rotatting about an axis of said rolling disc means; means for notching the upper surface of the formed fins.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, wherein said notching means includes a notching roller co-axially mounted with said rolling disc means.
Claim 4
Dependent Claim
39 words
Apparatus according to claim 2, wherein a smoothing roller means is co-axially mounted between said rolling disc means and said notching roller, said smoothing roller means smoothing the upper surface of the fins formed by said rolling disc means.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 3, wherein said smoothing roller is adapted to reduce the height of the fins by 5-15%.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 3, wherein a distance disc is co-axially mounted between said smoothing roller and said rolling disc means, the thickness of said distance disc corresponding approximately to one half the fin spacing.
Claim 7
Dependent Claim
20 words
Apparatus according to claim 5, wherein a correction disc is co-axially mounted between said notching roller and said smoothing roller.
Claim 8
Dependent Claim
138 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins, including: support means for said tube; rolling disc means for forming a finned tube, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasing diameters rotating about an axis of said rolling disc means; means for notching the upper surface of the formed fins, said notching roller means being co-axially mounted with said rolling disc means; flattening roller means for flattening the upper surface of said formed fins after said upper surface has been notched by said notching roller, said flattening roller being co-axially mounted with said rolling disc.
Claim 9
Dependent Claim
138 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins, including: support means for said tube; rolling disc means for forming a finned tube, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasing diameters rotating about an axis of said rolling disc means; means for notching the upper surface of the formed fins, said notching roller means being co-axially mounted with said rolling disc means; flattening roller means for flattening the upper surface of said formed fins after said upper surface has been notched by said notching roller, said flattening roller being co-axially mounted with said rolling disc.
Claim 10
Dependent Claim
39 words
Apparatus according to claim 7, wherein a smoothing roller means is co-axially mounted with said rolling disc means and said notching roller, said smoothing roller means smoothing the upper surface of the fins formed by said rolling disc means.
Claim 11
Dependent Claim
22 words
Apparatus according to claim 8, wherein said smoothing roller is adapted to reduce the height of the fins by 5 to 15%.
Claim 12
Dependent Claim
36 words
Apparatus according to claim 8, wherein a distance disc is co-axially mounted between said smoothing roller and said rolling disc means, the thickness of said distance disc corresponding to approximately one half of the fin spacing.
Claim 13
Dependent Claim
20 words
Apparatus according to claim 10, wherein a correction disc is co-axially mounted between said notching roller and said smoothing roller.
Claim 14
Dependent Claim
19 words
Apparatus according to claim 11, wherein said flattening roller means is co-axially mounted with and follows said notching roller.
Claim 15
Dependent Claim
112 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins including: a plurality of tool holders arranged at the circumference of the tube in staggered relation to each other; each tool holder including a plurality of rolling discs; at least one tool holder including a cylindrical smoothing roller co-axially mounted with the rolling discs; at least one tool holder including a notching roller co-axially mounted with the rolling discs, said smoothing roller being arranged between said notching roller and said rolling discs.
Claim 16
Dependent Claim
112 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins including: a plurality of tool holders arranged at the circumference of the tube in staggered relation to each other; each tool holder including a plurality of rolling discs; at least one tool holder including a cylindrical smoothing roller co-axially mounted with the rolling discs; at least one tool holder including a notching roller co-axially mounted with the rolling discs, said smoothing roller being arranged between said notching roller and said rolling discs.
Claim 17
Dependent Claim
30 words
Apparatus according to claim 13, wherein there is provided three tool holders arranged at 120° from each other, at least two of the said tool holders containing said notching rollers.
Claim 18
Dependent Claim
15 words
Apparatus according to claim 13, wherein the tube is non-rotatably mounted in a holding clamp.
Claim 19
Dependent Claim
11 words
Apparatus according to claim 13, wherein the tube is rotatably mounted.
Claim 20
Dependent Claim
121 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins including: a plurality of tool holders arranged at the circumference of the tube in staggered relation to each other; each tool holder including a plurality of rolling discs; at least one tool holder including a cylindrical smoothing roller co-axially mounted with the rolling discs; at least one tool holder including a notching roller co-axially mounted with the rolling discs, said smoothing roller being arranged between said notching roller and said rolling discs; at least one tool holder including a flattening roller.
Claim 21
Dependent Claim
121 words
Apparatus for forming fins on a tube outer side, which fins run circumferentially about the tube in a continuous fashion with the outer ends of the fins approaching the outer ends of adjacent fins forming a chamber between adjacent fins including: a plurality of tool holders arranged at the circumference of the tube in staggered relation to each other; each tool holder including a plurality of rolling discs; at least one tool holder including a cylindrical smoothing roller co-axially mounted with the rolling discs; at least one tool holder including a notching roller co-axially mounted with the rolling discs, said smoothing roller being arranged between said notching roller and said rolling discs; at least one tool holder including a flattening roller.
Claim 22
Dependent Claim
19 words
Apparatus according to claim 17, wherein said flattening roller is arranged subsequent to said notching roller and co-axial therewith.
Claim 23
Dependent Claim
30 words
Apparatus according to claim 17, wherein there is provided three tool holders arranged at 120° from each other, at least two of the said tool holders containing said notching roller.
Claim 24
Dependent Claim
15 words
Apparatus according to claim 17, wherein the tube is non-rotatably mounted in a holding clamp.
Claim 25
Dependent Claim
11 words
Apparatus according to claim 17, wherein the tube is rotatably mounted.
Claim 26
Independent Claim
212 words
An apparatus for constructing a finned tube having generally T-formed fins from a smooth walled tube including: support means for said tube; rolling disc means for forming finned tubes, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasingly diameters rotating about an axis of said rolling disc means; means for moving the tube in a longitudinal direction; means for flattening the fins formed by said rolling disc means, said means for flattening including a hull having a first surface at an oblique angle to the surface of the tube and a second surface running generally parallel to the surface of the tube and adjoining said first surface, said first surface being located at the outer circumference of the formed fins, said adjoining surface located radially inwardly of said outer circumference of the formed fins so that the formed fins contact said first surface and are moved against said surface by said means for moving and thereby flattened to the level of said second surface; and wherein said hull is of substantially doughnut form with said tube passing through the central aperture of said hull, the axis of said hull lying parallel to the axis of the tube, but displaced with regard thereto.
Claim 27
Independent Claim
212 words
An apparatus for constructing a finned tube having generally T-formed fins from a smooth walled tube including: support means for said tube; rolling disc means for forming finned tubes, said rolling disc means rotating relative to said tube and including a plurality of rolling discs of successively increasingly diameters rotating about an axis of said rolling disc means; means for moving the tube in a longitudinal direction; means for flattening the fins formed by said rolling disc means, said means for flattening including a hull having a first surface at an oblique angle to the surface of the tube and a second surface running generally parallel to the surface of the tube and adjoining said first surface, said first surface being located at the outer circumference of the formed fins, said adjoining surface located radially inwardly of said outer circumference of the formed fins so that the formed fins contact said first surface and are moved against said surface by said means for moving and thereby flattened to the level of said second surface; and wherein said hull is of substantially doughnut form with said tube passing through the central aperture of said hull, the axis of said hull lying parallel to the axis of the tube, but displaced with regard thereto.
Claim 28
Dependent Claim
133 words
A process for forming fins on a tube outer side which fins run circumferentially about the tube in a continuous fashion with their outer ends approaching the outer ends of adjacent fins forming a chamber between adjacent fins including the steps of: displacing the material making up the tube wall in an outward direction by means of a rolling process, said rolling process being carried out by means of rolling discs positioned at the circumference of the tube; smoothing the formed fins by means of radial pressure by means of a smoothing roller co-axially mounted with said rolling discs; notching the ends of the smoothed fins in the circumferentially direction of the tube, said notching steps being effected by means of a notching roller co-axially mounted with said smoothing roller and rolling means.
Claim 29
Dependent Claim
133 words
A process for forming fins on a tube outer side which fins run circumferentially about the tube in a continuous fashion with their outer ends approaching the outer ends of adjacent fins forming a chamber between adjacent fins including the steps of: displacing the material making up the tube wall in an outward direction by means of a rolling process, said rolling process being carried out by means of rolling discs positioned at the circumference of the tube; smoothing the formed fins by means of radial pressure by means of a smoothing roller co-axially mounted with said rolling discs; notching the ends of the smoothed fins in the circumferentially direction of the tube, said notching steps being effected by means of a notching roller co-axially mounted with said smoothing roller and rolling means.
Claim 30
Dependent Claim
34 words
A process according to claim 23, including the additional step of flattening said notched fins into a generally T-form, said flattening step being effected by a flattening roller mounted co-axially with said rolling means.
References Cited (Backward Citations)
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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) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |