Patent US4369837A successfully refreshed from Google Patents.
US4369837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube for tube-plate heat exchangers
Assignee: Chausson Usines SA
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Filing: 1981-02-04
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Granted: 1983-01-25
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Expires: 2001-02-04
Abstract
Abstract The tube has an oblong shape in cross-section with smaller sides rounded. The two ends of the tube are shaped so that the larger sides are formed with concavities making that in cross-section said two ends have a figure 8 shape over a portion of height corresponding at least to height of insertion of the tube in a tube plate.
Inventors
- 👤 Jean-Pierre Moranne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:57
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04; F; F28; F28F; F28F1/00; F28F1/02; F28F1/025; F28F1/06; F28F21/00; F28F21/06; F28F21/067; F28F9/00; F28F9/02; F28F9/04; F28F9/06; F28F9/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A tube for tube-plate heat exchanger, said tube having two ends with a cross section of an oblong shape having substantially flat larger sides and rounded smaller sides, the two ends being shaped so that the larger sides are formed with concavities making that in cross section, said two ends have a figure 8 shape over a portion of height corresponding at least to height of insertion of the tube in a tube plate, wherein each tube is inserted into a deformable gasket having, along larger sides of the tube, convergent overthicknesses, said gasket being maintained into a tube passage or a flange of an oblong shape.
Claim 2
Dependent Claim
107 words
A tube for tube-plate heat exchanger, said tube having two ends with a cross section of an oblong shape having substantially flat larger sides and rounded smaller sides, the two ends being shaped so that the larger sides are formed with concavities making that in cross section, said two ends have a figure 8 shape over a portion of height corresponding at least to height of insertion of the tube in a tube plate, wherein each tube is inserted into a deformable gasket having, along larger sides of the tube, convergent overthicknesses, said gasket being maintained into a tube passage or a flange of an oblong shape.
Claim 3
Dependent Claim
41 words
A tube according to claim 1, wherein flexible gaskets are interposed between the tube plate and the tube, said flexible gaskets applying, on the portion of the tube having a figure 8 shape, a resilient force over periphery of the tube.
Claim 4
Dependent Claim
29 words
A tube according to claim 2, wherein said resilient force brings the median portion of the inner walls of each of the larger sides in contact with each other.
Claim 5
Dependent Claim
30 words
A tube according to claim 1, wherein the tube passages are formed indifferently in a tube plate having flanges or in a thick tube plate made of a moulded material.
Claim 6
Dependent Claim
49 words
A tube according to claim 1, wherein the tube passages are formed in a portion only of the thickness of a thick tube plate, said tube passages being extended by a wall flaring out for cooperating with shaping of the tubes and positioning under pressure of the deformable gasket.
Claim 7
Dependent Claim
25 words
A tube according to claim 1, wherein each deformable gasket is formed from a continuous plate covering one or other side of the tube plate.
References Cited (Backward Citations)
GB284338A
Cited
GB879200A
Cited
FR1396051A
Cited
FR2250087A1
Cited
US4159035A
Cited
US4236577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |