US4276956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing scaffold for hot blast stove checker chamber relining
Assignee: Andco Inc
•
Filing: 1980-01-16
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Granted: 1981-07-07
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Expires: 2000-01-16
Abstract
Abstract A process of erecting interior combustion and checker chambers in a hot blast stove by lining the checker chamber and building the chamber wall from a vertically movable scaffold in the checker chamber shaped to conform with the interior thereof, laying up checkerwork in the checker chamber beneath the movable scaffold, these two operations being supplied from outside the stove through feed openings at progressive heights, and lining the combustion chamber from a vertically movable work scaffold within the combustion chamber. All three principle operations are carried on concurrently.
Inventors
- 👤 Ronald S. Mamula
- 👤 Samuel C. Dotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/02; C21B9/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A swing scaffold for use in relining the checker chamber of a hot blast stove comprising a platform shaped to conform with the shape of the checker chamber, an open grill in said platform to permit air flow through said scaffold from one side to the other, and a catch board suspended from said platform to catch debris passing through said grill and prevent it from falling into the chamber below.
Claim 2
Dependent Claim
71 words
A swing scaffold for use in relining the checker chamber of a hot blast stove comprising a platform shaped to conform with the shape of the checker chamber, an open grill in said platform to permit air flow through said scaffold from one side to the other, and a catch board suspended from said platform to catch debris passing through said grill and prevent it from falling into the chamber below.
Claim 3
Dependent Claim
43 words
A swing scaffold as set forth in claim 1, said platform being generally circular in outline and having a concave peripheral portion shaped to conform to an internal chamber wall separating a combustion chamber from a checker chamber in a hot blast stove.
Claim 4
Dependent Claim
29 words
A swing scaffold as set forth in claim 1, said catchboard being suspended from said platform by means permitting the passage of air while retaining debris on the catchboard.
References Cited (Backward Citations)
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US3193974A
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US3210060A
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US3560164A
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Cited
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Cited
US4033463A
Cited
US4221537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |