Patent US4221537A successfully refreshed from Google Patents.
US4221537A
Expired / Lapsed
US
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Hot blast stove erection process
Assignee: Andco Inc
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Filing: 1978-08-21
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Granted: 1980-09-09
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Expires: 1998-08-21
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 principal operations are carried on concurrently.
Inventors
- 👤 Ronald S. Mamula
- 👤 Samuel C. Dotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:57
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/02; C21B9/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
96 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber, with brickwork laid up from a work scaffold vertically movable within said checker chamber; and b. concurrently laying up checkerwork within said checker chamber beneath said movable scaffold, wherein materials for steps a and b are supplied through feed openings at progressive heights in said shell and closing said openings as the laying up of checkerwork progresses thereto.
Claim 2
Dependent Claim
96 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber, with brickwork laid up from a work scaffold vertically movable within said checker chamber; and b. concurrently laying up checkerwork within said checker chamber beneath said movable scaffold, wherein materials for steps a and b are supplied through feed openings at progressive heights in said shell and closing said openings as the laying up of checkerwork progresses thereto.
Claim 3
Dependent Claim
25 words
A process as defined in claim 1 further including the step of concurrently lining the remaining part of said shell to form a combustion chamber.
Claim 4
Dependent Claim
28 words
A process as defined in claim 2, wherein materials are supplied through a permanent fluid passage in said shell to a sling vertically movable in said combustion chamber.
Claim 5
Dependent Claim
25 words
A process as defined in claim 1, wherein said vertically movable work scaffold is shaped to conform with the interior wall of said checker chamber.
Claim 6
Dependent Claim
21 words
A process as defined in claim 2 further including concurrently laying ceramic burner and related refractory work in said combustion chamber.
Claim 7
Dependent Claim
129 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber with brickwork laid up from a vertically movable work scaffold; and b. concurrently laying up checkerwork within said checker chamber beneath said movable scaffold; wherein materials for steps a and b are supplied through feed openings at progressive heights in said shell and from staged platforms mounted on the outside of said shell at corresponding progressive heights, said staged platforms in turn being serviced by an elevator; further including the step of closing and sealing said feed openings with shell plate and lining brickwork as checkerwork progresses to each one thereof.
Claim 8
Dependent Claim
129 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber with brickwork laid up from a vertically movable work scaffold; and b. concurrently laying up checkerwork within said checker chamber beneath said movable scaffold; wherein materials for steps a and b are supplied through feed openings at progressive heights in said shell and from staged platforms mounted on the outside of said shell at corresponding progressive heights, said staged platforms in turn being serviced by an elevator; further including the step of closing and sealing said feed openings with shell plate and lining brickwork as checkerwork progresses to each one thereof.
Claim 9
Dependent Claim
130 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber with brickwork laid up from a vertically movable work scaffold; and b. concurrently laying up checkwork within said checker chamber beneath said movable scaffold; further including the step of concurrently lining the remaining part of said shell to form a combustion chamber with brickwork laid up from a vertically movable work scaffold within said combustion chamber; wherein materials are supplied through a permanent fluid passage in said shell; further including the step of closing and sealing said feed openings with shell plate and lining brickwork as checkerwork progresses to each one thereof.
Claim 10
Dependent Claim
130 words
A process of erecting the refractory interior of a hot blast stove having a shell including the steps of: a. lining part of said shell, and establishing a chamber wall within said shell to form a checker chamber with brickwork laid up from a vertically movable work scaffold; and b. concurrently laying up checkwork within said checker chamber beneath said movable scaffold; further including the step of concurrently lining the remaining part of said shell to form a combustion chamber with brickwork laid up from a vertically movable work scaffold within said combustion chamber; wherein materials are supplied through a permanent fluid passage in said shell; further including the step of closing and sealing said feed openings with shell plate and lining brickwork as checkerwork progresses to each one thereof.
Claim 11
Dependent Claim
116 words
A process of erecting the refractory interior of a hot blast stove having a shell and a checker chamber therein including the steps of: providing a checkerwork foundation in the bottom of said checker chamber; providing a vertically movable work scaffold in said checker chamber above said checkerwork foundation; providing a series of feed openings through said shell at spaced heights above said foundation; lining said checker chamber with brickwork using a crew working from said work scaffold; simultaneously laying up checkerwork within said checker chamber using another crew working beneath said scaffold; supplying brickwork and checkerwork to the respective crews through said openings, and closing said openings as the laying up of checkerwork progresses thereto.
Claim 12
Dependent Claim
116 words
A process of erecting the refractory interior of a hot blast stove having a shell and a checker chamber therein including the steps of: providing a checkerwork foundation in the bottom of said checker chamber; providing a vertically movable work scaffold in said checker chamber above said checkerwork foundation; providing a series of feed openings through said shell at spaced heights above said foundation; lining said checker chamber with brickwork using a crew working from said work scaffold; simultaneously laying up checkerwork within said checker chamber using another crew working beneath said scaffold; supplying brickwork and checkerwork to the respective crews through said openings, and closing said openings as the laying up of checkerwork progresses thereto.
Claim 13
Dependent Claim
50 words
The process of claim 8, further including the steps of establishing a chamber wall extending inwardly of said shell to form a combustion chamber therein; and lining said combustion chamber with brickwork using a third crew working in said combustion chamber simultaneously with the crews working in said checker chamber.
Claim 14
Dependent Claim
40 words
The process of claim 9, further including providing a platform in said combustion chamber, and installing burner material in said combustion chamber below said platform while work progresses in said checker chamber and in said combustion chamber above said platform.
Claim 15
Dependent Claim
37 words
The process of claim 8, wherein said scaffold is shaped to conform with the interior of said checker chamber, and providing for air flow in said checker chamber from one side of said scaffold to the other.
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |