Patent US3799257A successfully refreshed from Google Patents.
US3799257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Neratoom BV
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Filing: 1969-04-07
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Granted: 1974-03-26
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Expires: 1989-04-07
Abstract
Abstract Heat exchanger or unit for a heat exchanger for heat exchanging media reacting vigorously at direct contact composed of one tube for a heat transferring medium and one or more tubes for a heat absorbing medium each tube for the heat absorbing medium being externally in heat conductive contact for at least a large part of its length with the tube for the heat transferring medium by means of a channel-shaped recess provided externally in the wall of the tube for the heat transferring medium, each recess forming a location for a tube for the heat absorbing medium, the profile of which location corresponds to the external shape of each tube for the heat absorbing medium, and is carried out in such a way that the tube for the heat absorbing medium is located in this recess for not more than half its circumference.
Inventors
- 👤 Clercq W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:55
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/06; F22B1/063; F28; F28D; F28D7/00; F28D7/0008; F28D7/08; F28D7/082; F28D7/085; F28D7/087; F28F; F28F1/00; F28F1/02; F28F1/06; F28F1/10; F28F1/12; F28F1/14; F28D21/00; F28D2021/0019; F28D2021/0054; F28F2275/00; F28F2275/02; F28F2275/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A tube assembly for a heat exchanger adapted for media which react violently upon direct contact comprising a large tube provided with at least one external channel-shaped depression therein and at least one smaller tube which for a large part of its length is disposed with at most half of its circumference in the said channel-shaped depression in the large tube whose profile corresponds to the external shape of the smaller tube, the smaller tube being secured in the depression in the larger tube with means resulting in good thermal contact between the corresponding parts of the two tube surfaces and in only a slight strength of the connection as compared with the strength of the tube walls.
Claim 2
Dependent Claim
118 words
A tube assembly for a heat exchanger adapted for media which react violently upon direct contact comprising a large tube provided with at least one external channel-shaped depression therein and at least one smaller tube which for a large part of its length is disposed with at most half of its circumference in the said channel-shaped depression in the large tube whose profile corresponds to the external shape of the smaller tube, the smaller tube being secured in the depression in the larger tube with means resulting in good thermal contact between the corresponding parts of the two tube surfaces and in only a slight strength of the connection as compared with the strength of the tube walls.
Claim 3
Dependent Claim
56 words
A tube assembly as claimed in claim 1, wherein the two tubes are secured together solely by an adhesive located between a substantial part of the two corresponding tube surfaces, the said adhesive forming a connection which has good heat conductivity and whose mechanical strength is slight as compared with the strength of the tube material.
Claim 4
Dependent Claim
24 words
Heat exchanger according to claim 1, wherein the tube for the heat-transferring medium has several channel-shaped recesses, which are evenly distributed over the circumference.
Claim 5
Dependent Claim
24 words
Heat exchanger according to claim 1, wherein every channel-shaped recess is provided in a direction practically parallel to the centre line of the tube.
References Cited (Backward Citations)
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US1886498A
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US2327750A
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US2446289A
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |