Patent US3908756A successfully refreshed from Google Patents.
US3908756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube-in-shell heat exchangers
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1974-03-29
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Granted: 1975-09-30
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Expires: 1994-03-29
Abstract
Abstract A tube-in-shell heat exchanger comprises co-axial tubes on the longitudinal axis of a bundle of heat exchange tubes. The outer tube incorporates two spaced cylindrical tube sheets in which the opposed ends of the heat exchange tubes are received. The outer tube is closed at one end and the corresponding end of the inner tube is sealed to the outer tube between the tube sheets to define discrete co-axial fluid flow ducts which are interconnected at the closed end region of the outer tube by the heat exchange tubes.
Inventors
- 👤 John Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
G; G21; G21C; G21C17/00; F; F28; F28D; F28D7/00; F28D7/10; F28D7/103; F28F; F28F27/00; F28F9/00; F28F9/02; F28D21/00; F28D2021/0019; F28D2021/0054; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A tube-in-shell heat exchanger comprising, a bundle of parallel heat exchange tubes within a shell and having their ends received in a pair of longitudinal spaced cylindrical tube sheets, a tube member disposed on the longitudinal axis of the bundle of tubes, the tube member incorporating the spaced tube sheets and having a closed end, a demountable tubular baffle disposed within the tube member and sealed thereto between the tube sheets to define discrete coaxial fluid flow ducts interconnected at the closed end region of the tubular member by the heat exchange tubes.
Claim 2
Dependent Claim
93 words
A tube-in-shell heat exchanger comprising, a bundle of parallel heat exchange tubes within a shell and having their ends received in a pair of longitudinal spaced cylindrical tube sheets, a tube member disposed on the longitudinal axis of the bundle of tubes, the tube member incorporating the spaced tube sheets and having a closed end, a demountable tubular baffle disposed within the tube member and sealed thereto between the tube sheets to define discrete coaxial fluid flow ducts interconnected at the closed end region of the tubular member by the heat exchange tubes.
Claim 3
Dependent Claim
30 words
A heat exchanger according to claim 1 wherein the tubular baffle comprises inner and outer spaced walls, the interspace containing argon and the inner wall having a flexible expansible region.
Claim 4
Dependent Claim
21 words
A heat exchanger according to claim 2 having a cylindrical baffle spaced from and encircling the tube member and tube sheets.
Claim 5
Dependent Claim
42 words
A heat exchanger according to claim 2 in which the shell has at least one radial inlet port for heat exchange fluid flow and a closure member for the port comprising a cylindrical sleeve slidable along the longitudinal axis of the shell.
Claim 6
Dependent Claim
33 words
A heat exchanger according to claim 2 having a drain tube extending within the tube member from the closed end to a drain facility in the opposed end region of the tube member.
References Cited (Backward Citations)
US3768554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |