US4012029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tundishes
Assignee: Foseco Trading AG
•
Filing: 1974-07-30
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Granted: 1977-03-15
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Expires: 1994-07-30
Abstract
Abstract A tundish comprising an outer metal casing, a permanent lining of refractory material adjacent the casing, a layer of essentially unbonded particulate refractory material adjacent the permanent lining and, adjacent the layer of particulate refractory material, an expendable lining made up of a set of slabs of refractory heat-insulating material.
Inventors
- 👤 Claude Seguin
- 👤 Bernard DE Wiet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
In a tundish comprising an outer metal casing and a permanent lining of refractory material adjacent the casing, the improvement which comprises providing a layer of essentially unbonded particulate refractory material adjacent and parallel the permanent lining and, adjacent the layer of particulate refractory material and in parallel spaced relation to the permanent lining, an expendable lining made up of a set of slabs of refractory heat-insulating material.
Claim 2
Dependent Claim
68 words
In a tundish comprising an outer metal casing and a permanent lining of refractory material adjacent the casing, the improvement which comprises providing a layer of essentially unbonded particulate refractory material adjacent and parallel the permanent lining and, adjacent the layer of particulate refractory material and in parallel spaced relation to the permanent lining, an expendable lining made up of a set of slabs of refractory heat-insulating material.
Claim 3
Dependent Claim
24 words
The tundish of claim 1 wherein the permanent lining has protuberances serving to space the slabs of the expendable lining from the permanent lining.
Claim 4
Dependent Claim
19 words
The tundish of claim 1 wherein the slabs of the expendable lining bear projections which abut the permanent lining.
Claim 5
Dependent Claim
19 words
The tundish of claim 1 and including separators between the permanent lining and the slabs of the expendable lining.
Claim 6
Dependent Claim
14 words
The tundish of claim 1 wherein the permanent lining is formed of refractory brick.
Claim 7
Dependent Claim
14 words
The tundish of claim 1 wherein the permanent lining is a cast monolithic lining.
Claim 8
Dependent Claim
15 words
The tundish of claim 1 wherein the permanent lining is 1 - 10 cm thick.
Claim 9
Dependent Claim
33 words
The tundish of claim 1 wherein the unbonded particulate refractory material is selected from the class consisting of silica sand, olivine sand, chromite sand, crushed chamotte, grog, crushed fireclay and crushed basic refractories.
Claim 10
Dependent Claim
18 words
The tundish of claim 1 wherein the thickness of the essentially unbonded layer is 1 - 5 cm.
Claim 11
Dependent Claim
22 words
The tundish of claim 1 wherein the slabs of refractory heat-insulating material are formed of refractory fiber, refractory filler and a binder.
Claim 12
Dependent Claim
18 words
The tundish of claim 1 wherein the slabs of the expendable lining are 0.5 to 10 cm thick.
Claim 13
Dependent Claim
44 words
The tundish of claim 1 wherein the metal casing has an upper horizontal outwardly directed flange, the slabs of the expendable lining extend to above the level of the flange, and the flange is covered by a layer of essentially unbonded particulate refractory material.
References Cited (Backward Citations)
US1681943A
Cited
US1871159A
Cited
US1917849A
Cited
US3203689A
Cited
US3458641A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |