US3768980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace design
Assignee: TOPSOE H DK
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Filing: 1971-09-16
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Granted: 1973-10-30
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Expires: 1991-09-16
Abstract
Abstract A furnace for catalytic, endothermic reactions comprising at least one row of substantially vertical reactor tubes in at least one furnace chamber, inlet pigtails compensating for thermal expansions of the reactor tubes, outlet means including at least substantially straight connecting pipes forming substantially right angles with said reactor tubes, and suspension means of said reactor tubes, said means being disposed at the lower end of said reactor tubes allowing a substantially frictionless movement of the lower ends of said reactor tubes in all directions within a substantially horizontal plane large enough to compensate for the thermal expansions of said outlet means in order to make the structure of the furnace chamber independent of thermal expansions of the reactor tubes and simultaneously simplify the outlet piping means.
Inventors
- 👤 P Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:10
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/007; F28F9/013; B; B01; B01J; B01J8/00; B01J8/02; B01J8/06; B01J8/062; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
A furnace according to claim 1 comprising means to hold one end of said at least one manifold fixed while permitting said at least one manifold to expand freely in a direction parallel to its length towards its other end.
Claim 2
Dependent Claim
40 words
A furnace according to claim 2 wherein said suspension means comprise means for individually supporting tHe weight of each of said reactor tubes and for individually securing each of said lower ends to said furnace for said substantially frictionless movement.
Claim 3
Dependent Claim
28 words
A furnace according to claim 3 wherein said suspension means further comprise means for individually adjusting the position of each of said reactor tubes in the vertical direction.
Claim 4
Dependent Claim
57 words
A furnace according to claim 2 wherein said suspension means comprise: a. first support means secured to each of said lower ends; b. second support means secured to said furnace; and c. means for pivotally connecting said first and second support means for said substantially frictionless movement of said lower ends and for supporting said reactor tubes.
Claim 5
Dependent Claim
41 words
A furnace according to claim 5 wherein said first support means comprise a plurality of horizontal beams, one for each tube, each having a first plurality of eye-hooks connected thereto, and said second support means comprise a second plurality of eye-hooks.
Claim 6
Dependent Claim
105 words
A furnace according to claim 6 wherein said means for pivotably connecting said first and second means comprises a plurality of rods having hooked ends, and wherein each of said beams is positioned so that each of said first plurality of eye-hooks is positioned opposite one of said second plurality of eye-hooks to constitute a plurality of opposed eye-hook pairs, the hooked ends of each of said rods being operative to engage and pivotably connect one of said eye-hook pairs, said first support means further comprising a plurality of supporting rods, one for each reactor tube, for securing said reactor tubes to said horizontal beams.
Claim 7
Dependent Claim
126 words
A furnace according to claim 6 wherein each of said beams is positioned so that each of said first plurality of eye-hooks is positioned opposite one of said second plurality of eye-hooks to constitute a plurality of opposed eye-hook pairs, and wherein said means for pivotably connecting said first and second means comprises a plurality of rod pairs and a plurality of turnbuckles, one rod pair being for each turnbuckle, each rod of a pair having a hooked end and a threaded end, the hooked ends of each rod of a rod pair being operative to engage and pivotably connect one of said eye-hook pairs, and the threaded ends of each rod of a rod pair being screwed into opposite ends of one of said turnbuckles.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |