US4352378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbed construction assembled from sheet metal bands for improved heat transfer
Assignee: Transelektro Magyar Villamossagi Kulkereskedelmi
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Filing: 1980-07-16
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Granted: 1982-10-05
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Expires: 2000-07-16
Abstract
Abstract A ribbed construction assembled from sheet metal bands for improved heat transfer, suitably built into the pipes of heat exchangers forms the arrangement of the invention. The ribbed construction assembled from toothed metal bands ensures the improved heat transfer primarily by slowing down the velocity of the medium flowing in the center of the pipe; furthermore it improves the temperature distribution of the flowing medium by means of metallic contact and mixing. Although the ribs are easily movable in the pipe, a significant portion of the tooth-ends is in loose contact with the inner pipe wall, which likewise improves the heat transfer.
Inventors
- 👤 Gyorgy Bergmann
- 👤 Mihaly Horvath
- 👤 Gyorgy Palfalvi
- 👤 Gabor Tomcsanyi
- 👤 Gyula Kovacs
- 👤 Kardy Laszlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:20
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/12; F28F2280/00; F28F2280/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
In a heat exchanger pipe, a ribbed construction for heat transfer mounted in said heat exchanger pipe comprising at least three metal bands adjoining one another and each having a plurality of projecting teeth defining indentations therebetween, the projecting teeth of one adjoining metal band extending into said indentations of another adjoining metal band, said metal bands defining a longitudinal central channel in said pipe extending the length of the bands.
Claim 2
Dependent Claim
71 words
In a heat exchanger pipe, a ribbed construction for heat transfer mounted in said heat exchanger pipe comprising at least three metal bands adjoining one another and each having a plurality of projecting teeth defining indentations therebetween, the projecting teeth of one adjoining metal band extending into said indentations of another adjoining metal band, said metal bands defining a longitudinal central channel in said pipe extending the length of the bands.
Claim 3
Dependent Claim
45 words
The ribbed construction as set forth in claim 1, wherein said longitudinal channel is, in transverse cross-section of the pipe, in the shape of a regular polygon, the number of sides of which correspond to the number of metal bands used for the ribbed construction.
Claim 4
Dependent Claim
19 words
The ribbed construction as set forth in claim 2, wherein three metal bands are used for the ribbed construction.
Claim 5
Dependent Claim
19 words
The ribbed construction as set forth in claim 2, wherein four metal bands are used for the ribbed construction.
Claim 6
Dependent Claim
28 words
The ribbed construction as set forth in claim 1, wherein said plurality of teeth project perpendicularly relative to the longitudinal axis of said pipe from said metal band.
Claim 7
Dependent Claim
30 words
The ribbed construction as set forth in claim 1, wherein said plurality of teeth project at an angle relative to the longitudinal axis of said pipe from said metal band.
Claim 8
Dependent Claim
35 words
The ribbed construction as set forth in claim 6, wherein the teeth of said metal bands interdigitate in such a a way that the angularity of the teeth of adjacent metal band is mutually opposite.
Claim 9
Dependent Claim
19 words
The ribbed construction as set forth in claim 1, wherein the projecting teeth are widest at their free ends.
Claim 10
Dependent Claim
51 words
The ribbed construction as set forth in claim 1, wherein said metal bands are composed of a main longitudinal body from which said projecting teeth of said metal bands extend laterally, and portions of said main longitudinal body being bent away from it to form baffle plates and expose openings therein.
Claim 11
Dependent Claim
57 words
The ribbed construction as set forth in claim 9, wherein the metal bands are arranged relative to each other so that the baffle plates of at least one metal band extend substantially toward the longitudinal axis of said pipe and the baffle plates of at least one other metal band extend substantially away from said longitudinal axis.
Claim 12
Dependent Claim
26 words
The ribbed construction as set forth in claim 1, wherein the free ends of said projecting teeth are in contact with the walls of the pipe.
References Cited (Backward Citations)
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Cited
US2929408A
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US3783938A
Cited
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Cited
US4265275A
Cited
US4200149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |