Patent US3780916A successfully refreshed from Google Patents.
US3780916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary gate for bottom pour vessel having removable nozzles
Assignee: United States Steel Corp
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Filing: 1971-12-17
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Granted: 1973-12-25
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Expires: 1991-12-17
Abstract
Abstract A rotary gate for a bottom-pour vessel has a plurality of removable and interchangeable refractory inserts, at least one of which has a nozzle opening therethrough. The inserts can be removed or replaced at any time they are not in the active position.
Inventors
- 👤 J Shapland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:58
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/5109
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
An apparatus for teeming molten metal including a vessel having a bottom discharge nozzle, a valve on the exterior of said vessel for controlling the discharge of molten metal through said nozzle, said valve being rotatable through 360*, and means for mounting said valve for rotation about its central axis, the improvement comprising: a plurality of interchangeable refractory inserts in said valve, at least one of said inserts having a teeming opening therein; said valve having means for supporting said inserts, and means for allowing said inserts to be inserted into and removed from said valve radially and transversely with respect to said central axis; and means for retaining said inserts in said valve.
Claim 2
Independent Claim
114 words
An apparatus for teeming molten metal including a vessel having a bottom discharge nozzle, a valve on the exterior of said vessel for controlling the discharge of molten metal through said nozzle, said valve being rotatable through 360*, and means for mounting said valve for rotation about its central axis, the improvement comprising: a plurality of interchangeable refractory inserts in said valve, at least one of said inserts having a teeming opening therein; said valve having means for supporting said inserts, and means for allowing said inserts to be inserted into and removed from said valve radially and transversely with respect to said central axis; and means for retaining said inserts in said valve.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1 wherein said means for supporting said inserts comprises a plurality of radial ribs equally spaced about said axis and dividing the valve into a plurality of compartments.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 2, wherein said inserts have shoulders adapted for engagement with said ribs.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 1, wherein said valve includes a peripheral flange, and a plurality of spring-biased detent pins are housed in said flange, whereby said inserts are retained in said valve when said valve is rotated.
Claim 6
Dependent Claim
19 words
Apparatus according to claim 1, wherein at least one of said refractory inserts is enclosed in a metal frame.
Claim 7
Dependent Claim
33 words
Apparatus according to claim 1, wherein the teeming opening of at least one insert is in one side of such insert to provide a teeming position and a shut-off position in such insert.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |