US4328957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated multiple density blast furnace runner
Assignee: Individual
•
Filing: 1980-11-12
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Granted: 1982-05-11
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Expires: 2000-11-12
Abstract
Abstract A runner for hot metal as from a blast furnace is formed of a series of interconnected modular units, each of which is prefabricated from materials usable as conventional fire bricks, the body of said runner being a unitary mass formed of successive layers of said material, each of said layers being coalesced under the influence of physical force not under thermal influence to a different density with no reinforcement thereby providing a known life and a visible indication of the degree to which the runner is worn away by the passage of hot metal therethrough.
Inventors
- 👤 Michael D. LaBate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:34
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A hot metal runner unit comprising an elongated trough-like body member having a base and spaced parallel upstanding side sections wherein said runner unit is a multi-layered mass coalesced by physical force not under thermal influence with each of multi-layers being of a different density and having a known predetermined lifetime when subjected to molten metal flowing therethrough.
Claim 2
Dependent Claim
58 words
A hot metal runner unit comprising an elongated trough-like body member having a base and spaced parallel upstanding side sections wherein said runner unit is a multi-layered mass coalesced by physical force not under thermal influence with each of multi-layers being of a different density and having a known predetermined lifetime when subjected to molten metal flowing therethrough.
Claim 3
Dependent Claim
23 words
The hot metal runner unit set forth in claim 1 and wherein the mass comprises material selected from those usable for fire bricks.
Claim 4
Dependent Claim
17 words
The hot metal runner unit set forth in claim 1 and wherein the mass is refractory material.
Claim 5
Dependent Claim
31 words
The hot metal runner unit set forth in claim 1 and wherein the mass of the unit is formed progressively of several layers, each compacted to a different degree of thickness.
Claim 6
Dependent Claim
38 words
The hot metal runner unit set forth in claim 1 and wherein a graphite coating is penetrated into the exposed surfaces of said unit and the graphite is applied as a sub-colloidal particle size in a liquid carrier.
Claim 7
Dependent Claim
43 words
The hot metal runner unit set forth in claim 1 and wherein the opposite ends of said runner unit are stepped, one end inwardly and one end outwardly, so as to form interengaging configurations on adjacent runner units in axial alignment and engagement.
References Cited (Backward Citations)
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Cited
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Cited
US3600480A
Cited
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Cited
US4039172A
Cited
GB2025012A
Cited
US4262885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |