Patent US3799520A successfully refreshed from Google Patents.
US3799520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-part gas-collecting hood for converter
Assignee: Gottfried Bischoff Bau Kompl Gasreinigungs und Wasserrueckkehlanlagen GmbH and Co KG
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Filing: 1973-04-16
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Granted: 1974-03-26
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Expires: 1993-04-16
Abstract
Abstract A gas-collecting hood for a steel-making converter has a fixed upper ring formed by an array of heat-exchanger tubes and a similarly formed lower ring which surrounds and telescopes with the upper ring and may be dropped down around the mouth of the converter. A chain seal is provided which rests on a ledge formed by an outwardly bent flange at the top of the lower ring and which engages the exterior of the inner ring. This chain is formed of a plurality of rigid links which are fitted and pivoted together by means of integrally formed pins and holes as in a sprocket chain.
Inventors
- 👤 K Hegemann
- 👤 G Finger
- 👤 M Pasambegovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:23
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A gas-collecting hood for a converter, comprising: a fixed upper ring connected to an outlet and spacedly juxtaposed with a mouth of the converter; a vertically displaceable lower ring surrounding said upper ring and having an upper side forming an outwardly extending annular support ledge and a lower side engageable with said converter around said mouth; and a chain collar resting on said ledge and radially inwardly engaging said upper ring, said collar being formed of a plurality of interconnected rigid links.
Claim 2
Dependent Claim
82 words
A gas-collecting hood for a converter, comprising: a fixed upper ring connected to an outlet and spacedly juxtaposed with a mouth of the converter; a vertically displaceable lower ring surrounding said upper ring and having an upper side forming an outwardly extending annular support ledge and a lower side engageable with said converter around said mouth; and a chain collar resting on said ledge and radially inwardly engaging said upper ring, said collar being formed of a plurality of interconnected rigid links.
Claim 3
Dependent Claim
44 words
The hood defined in claim 1 wherein at least some of said links are provided with an upstanding pin and at least others are formed with a hole, the pins of said some of said links engaging in the holes of the other links.
Claim 4
Dependent Claim
25 words
The hood defined in claim 2 wherein each of said links is formed with curved ends fitting against correspondingly curved ends of the other links.
Claim 5
Dependent Claim
13 words
The hood defined in claim 1 wherein said links are formed of hematite.
Claim 6
Dependent Claim
57 words
The hood defined in claim 1 wherein each of said links is elongated and has outwardly convex ends and is formed with a central upstanding region having ends of a concavity corresponding to the convexity of the first-mentioned ends, the first ends of each link fitting with the second-mentioned ends of the adjoining links in said chain.
Claim 7
Dependent Claim
51 words
The hood defined in claim 5 wherein each link is formed to one side of said upstanding region with an upstanding cylindrical pin and to the other side of said upstanding region with a hole, the pin of each link fitting in said chain into the hole of the neighboring link.
Claim 8
Dependent Claim
34 words
The hood defined in claim 1 wherein said upper ring is constituted by an array of coolant tubes and at least one metal wear-resistant apron, said chain having an inner periphery engaging said apron.
Claim 9
Dependent Claim
28 words
The hood defined in claim 1 wherein said lower ring is constituted by an array of heat-exchange tubes and an annular plate attached thereto and forming said ledge.
Claim 10
Dependent Claim
102 words
The hood defined in claim 6 wherein said links each comprise a pair of tongues lying in a common plane and unitarily formed with an extending in opposite directions from the respective upstanding region, one of said tongues of each link being formed with a respective such pin, the other tongue of each link being formed with a respective such hole, the ends of said tongues having radii of curvature centered on the axes of said pins and said holes, the upstanding regions having a thickness equal to twice that of the respective tongues, alternate links of said chain having opposite orientations.
References Cited (Backward Citations)
US3396958A
Cited
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 |