US3970283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pouring of molten metals
Assignee: United States Steel Corp
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Filing: 1975-01-09
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Granted: 1976-07-20
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Expires: 1995-01-09
Abstract
Abstract A sliding gate valve has a sliding plate provided with an under-hung insulating member having a hollow nose, the hollow nose having a tapered bore in which a molten metal resistant liner is cemented, the liner being tapered to fit the bore and a frangible cement being used to detachably secure the liner in the nose so that the liner can be readily replaced when worn.
Inventors
- 👤 Robert Duncan Hind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:52
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/28; B22D41/30; B22D41/50; B22D41/52; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6161
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
In a sliding gate which includes a refractory sliding plate having an orifice, and a collector nozzle extending from said plate in line with said orifice, the improvement in which said nozzle comprises: an insulating tubular refractory member having a downwardly tapered bore; a tubular liner of erosion-resistant refractory within said tapered bore and having a conforming downwardly tapered outer surface and a cylinderical bore; and a layer of frangible refractory cement between the tapered surfaces of said tapered bore and said liner affixing said liner within said member; said liner being readily removable from said member on breaking of said cement.
Claim 2
Dependent Claim
102 words
In a sliding gate which includes a refractory sliding plate having an orifice, and a collector nozzle extending from said plate in line with said orifice, the improvement in which said nozzle comprises: an insulating tubular refractory member having a downwardly tapered bore; a tubular liner of erosion-resistant refractory within said tapered bore and having a conforming downwardly tapered outer surface and a cylinderical bore; and a layer of frangible refractory cement between the tapered surfaces of said tapered bore and said liner affixing said liner within said member; said liner being readily removable from said member on breaking of said cement.
Claim 3
Dependent Claim
27 words
A gate as defined in claim 1 in which said liner extends through said plate and has an end face flush with the face of said plate.
Claim 4
Dependent Claim
29 words
A gate as defined in claim 1 comprising in addition a reinforcing metal pan encasing said plate and a metal sleeve fixed to said pan and encasing said member.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |