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Patent US3735011A successfully refreshed from Google Patents.
US3735011A
Expired / Lapsed
US
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Circular refractory brick construction
Assignee: Special Metals Corp
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Filing: 1972-01-17
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Granted: 1973-05-22
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Expires: 1992-01-17
Abstract
Abstract Circular crucible or the like constructed from arcuate refractory bricks wherein the mating edges of the bricks are at uniform acute angles with respect to the radius of the furnace. This permits each brick to slide on the mating edges of adjacent bricks such that circumferential or tangential thermal expansion forces will not materially increase the radius of the crucible.
Inventors
- 👤 F Soykan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
F; F27; F27D; F27D1/00; F27B; F27B14/00; F27B14/08; F27B3/00; F27B3/10; F27B3/12; F27B14/06; F27B14/061; F27B14/10; F27B2014/102; F27D1/04; F27D1/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
In a generally circular vessel for molten metal and the like, a wall construction formed from arcuate refractory bricks stacked one upon the other, the abutting edge surfaces of said bricks at opposite ends of their arcuate configurations being at uniform acute angles with respect to the radius of said vessel whereby thermal expansion forces generated in said bricks will cause the edge surface of at least one brick to slide on the abutting edge surface of an adjacent brick without materially increasing the radius of said wall.
Claim 2
Dependent Claim
88 words
In a generally circular vessel for molten metal and the like, a wall construction formed from arcuate refractory bricks stacked one upon the other, the abutting edge surfaces of said bricks at opposite ends of their arcuate configurations being at uniform acute angles with respect to the radius of said vessel whereby thermal expansion forces generated in said bricks will cause the edge surface of at least one brick to slide on the abutting edge surface of an adjacent brick without materially increasing the radius of said wall.
Claim 3
Dependent Claim
19 words
The wall construction of claim 1 wherein the edge surfaces of each brick are sloped in the same direction.
Claim 4
Dependent Claim
76 words
The wall construction of claim 2 wherein said edge surfaces are defined by lines drawn from the inner radial end of one edge surface of a brick to a point on a circle which lies intermediate the center of the vessel and the inner periphery of the wall, said point on the circle being defined by the intersection therewith of a radius which intersects the inner radial end of the other edge surface of said brick.
Claim 5
Dependent Claim
24 words
The wall construction of claim 3 wherein said circle has a diameter equal to one-half the diameter of the inner periphery of the vessel.
Claim 6
Dependent Claim
24 words
The wall construction of claim 3 including an induction coil surrounding said wall, and ceramic ramming and insulation material embedded around said induction coil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |