US4698948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall construction for industrial use
Assignee: Denka Co Ltd
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Filing: 1986-07-11
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Granted: 1987-10-13
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Expires: 2006-07-11
Abstract
Abstract According to the invention a multi-layered furnace wall construction for industrial use is provided. The wall construction comprises an outermost iron shell layer, an innermost refractory fiber block layer and an intermediate layer interposed between the iron shell layer and the refractory fiber block layer. The refractory fiber block layer is secured to the intermediate layer by means of stud bolts and washers of ceramic material. The fibers constituting said refractory fiber block layer are oriented such that they extend in the direction substantially perpendicular to the surface plane of the furnace wall.
Inventors
- 👤 Mitsuo Yamashita
- 👤 Akinori Koda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:30
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009; F27D1/002; F27D1/04; F27D1/06; F27D1/14; F27D1/144; Y; Y10; Y10S; Y10S411/00; Y10S411/909
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
A multi-layered furnace wall construction for industrial use, comprising an outermost iron shell layer, an innermost refractory fiber block layer comprised of a plurality of refractory fiber blocks, and an intermediate layer interposed between said iron shell layer and said refractory fiber block layer, said refractory fiber block layer being secured to said intermediate layer by means of stud bolts and washers of ceramic material, each of the stud bolts being situated in a joint between adjacent ones of said refractory fiber blocks and having a free and extending away from the interior faces of the refractory fiber blocks, each of the free ends receiving a respective one of the washers adjacent the interior faces of the refractory fiber blocks, so that said refractory fiber blocks are compressed between said stud bolts in a direction substantially parallel to the surface plane of the furnace wall and secured in a direction perpendicular to the furnace wall, and the fibers constituting said refractory fiber block layer being oriented such that they extend substantially perpendicular to the surface plane of the furnace wall.
Claim 2
Dependent Claim
180 words
A multi-layered furnace wall construction for industrial use, comprising an outermost iron shell layer, an innermost refractory fiber block layer comprised of a plurality of refractory fiber blocks, and an intermediate layer interposed between said iron shell layer and said refractory fiber block layer, said refractory fiber block layer being secured to said intermediate layer by means of stud bolts and washers of ceramic material, each of the stud bolts being situated in a joint between adjacent ones of said refractory fiber blocks and having a free and extending away from the interior faces of the refractory fiber blocks, each of the free ends receiving a respective one of the washers adjacent the interior faces of the refractory fiber blocks, so that said refractory fiber blocks are compressed between said stud bolts in a direction substantially parallel to the surface plane of the furnace wall and secured in a direction perpendicular to the furnace wall, and the fibers constituting said refractory fiber block layer being oriented such that they extend substantially perpendicular to the surface plane of the furnace wall.
Claim 3
Dependent Claim
40 words
The multi-layered furnace wall construction according to claim 1, further comprising a refractory mortar layer interposed between said intermediate layer and said refractory fiber block layer for cementing the fibers of said refractory fiber layer to said refractory mortar layer.
Claim 4
Dependent Claim
29 words
The multi-layered furnace wall construction according to claim 2, wherein the end portions of said stud bolts thrusting into said intermediate layer are coated with said refractory mortar layer.
Claim 5
Dependent Claim
35 words
The multi-layered furnace wall construction according to claim 2, wherein said intermediate layer is made of a material selected from the group consisting of plastics refractories, fire bricks, castable refractories, heat-insulating bricks and combinations thereof.
Claim 6
Dependent Claim
44 words
The multi-layered furnace wall construction according to claim 2, wherein the interior surface of said refractory fiber block layer is covered with a lining layer of ceramic coating material, the interior of said refractory fiber block layer being free of said ceramic coating material.
Claim 7
Dependent Claim
50 words
The multi-layered furnace wall construction according to claim 1, wherein said intermediate layer includes a rock wool layer arranged internally of said iron shell layer, and a ceramic fiber layer arranged internally of said rock wool layer, and wherein said refractory fiber block layer is made of crystallized aluminous fibers.
Claim 8
Dependent Claim
44 words
The multi-layered furnace wall construction according to claim 6, wherein the interior surface of said refractory fiber block layer is covered with a lining layer of ceramic coating material, the interior of said refractory fiber block layer being free of said ceramic coating material.
Claim 9
Dependent Claim
35 words
The multi-layered furnace wall construction according to claim 1, wherein each of said stud bolts is connected to a metal pin fixed to said iron shell layer, said metal pin extending into said intermediate layer.
Claim 10
Dependent Claim
38 words
The multi-layered furnace wall construction according to claim 1, wherein said refractory fiber block layer is made of a fibrous material selected from the group consisting of ceramic fibers, aluminous fibers, zirconia-base fibers, magnesia-base fibers and mixtures thereof.
References Cited (Backward Citations)
US1448684A
Cited
US2281003A
Cited
US2412744A
Cited
US2559763A
Cited
US3636674A
Cited
US3523395A
Cited
US3606722A
Cited
FR2065867A5
Cited
DE2231658A1
Cited
US4574995A
Cited
US3832815A
Cited
US3930916A
Cited
FR2239572A1
Cited
US4030261A
Cited
US4379382A
Cited
US4429504A
Cited
US4432289A
Cited
JPH1015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |