Patent US330213A successfully refreshed from Google Patents.
US3752218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous casting moulds
Assignee: Ashmore Benson Pease and Co Ltd
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Filing: 1971-01-25
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Granted: 1973-08-14
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Expires: 1991-01-25
Abstract
Abstract A continuous casting machine includes a tundish having an outlet defined by a body of refractory material, a mould of a material having high thermal conductivity and defining a mould passage arranged with its inlet end in communication with the outlet of the tundish and an apertured plate of silicon nitride positioned between the refractory material and the mould and held in compression by a metal body which surrounds the perimeter of the plate. The metal body is mounted in good heat transfer relationship with the mould.
Inventors
- 👤 P Gamble
- 👤 J Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:18
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/045; B22D11/047; B22D11/0475
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet defined by a body of refractory material, a coolable continuous casting mould of a material having a high thermal conductivity and defining a mould passage which is arranged with its inlet end in communication with the outlet of the tundish but spaced apart therefrom and an apertured body of silicon nitride interposed between and in sealing relation with the refractory material and the mould.
Claim 2
Dependent Claim
86 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet defined by a body of refractory material, a coolable continuous casting mould of a material having a high thermal conductivity and defining a mould passage which is arranged with its inlet end in communication with the outlet of the tundish but spaced apart therefrom and an apertured body of silicon nitride interposed between and in sealing relation with the refractory material and the mould.
Claim 3
Dependent Claim
48 words
A continuous casting machine as claimed in claim 1 in which the body of silicon nitride is in the form of a ring and the inner surface of the ring serves as an extension to the surface of the mould passage at the inlet end of the mould.
Claim 4
Dependent Claim
41 words
A continuous casting machine as claimed in claim 1 in which the body of silicon nitride is in the form of a ring and includes a portion which projects inwardly of the mould passage and normal to the longitudinal axis thereof.
Claim 5
Dependent Claim
34 words
A continuous casting machine as claimed in claim 1 in which the body of silicon nitride is in two parts each of ring form and arranged side-by-side between the refractory material and the mould.
Claim 6
Dependent Claim
75 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet in the form of a fire-clay nozzle, a copper, liquid cooled, mould defining a mould passage extending therethrough, and an apertured body of silicon nitride positioned between the nozzle and the mould in sealing relation therewith and defining a passage connecting the outlet of the nozzle and the inlet of the mould passage.
Claim 7
Dependent Claim
75 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet in the form of a fire-clay nozzle, a copper, liquid cooled, mould defining a mould passage extending therethrough, and an apertured body of silicon nitride positioned between the nozzle and the mould in sealing relation therewith and defining a passage connecting the outlet of the nozzle and the inlet of the mould passage.
Claim 8
Dependent Claim
34 words
A continuous casting machine as claimed in claim 5 in which the cross-sectional dimensions of the aperture defined by the silicon nitride are less than the corresponding cross sectional dimensions of the mould passage.
Claim 9
Dependent Claim
125 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet defined by a body of refractory material, a continuous casting mould of a material having a high thermal conductivity and defining a mould passage, an apertured plate of silicon nitride with the cross sectional dimensions of the aperture being not greater than the corresponding cross-sectional dimensions of the mould passage, a metal body surrounding the perimeter of the plate and applying compressive forces thereto, said plate of silicon nitride being positioned between and in sealing relation with the body of refractory material and the mould to provide a passage therebetween and with the metal body in good heat transfer relation with the mould.
Claim 10
Dependent Claim
125 words
A continuous casting machine comprising a tundish for receiving a quantity of molten metal to be cast, the tundish having an outlet defined by a body of refractory material, a continuous casting mould of a material having a high thermal conductivity and defining a mould passage, an apertured plate of silicon nitride with the cross sectional dimensions of the aperture being not greater than the corresponding cross-sectional dimensions of the mould passage, a metal body surrounding the perimeter of the plate and applying compressive forces thereto, said plate of silicon nitride being positioned between and in sealing relation with the body of refractory material and the mould to provide a passage therebetween and with the metal body in good heat transfer relation with the mould.
Claim 11
Dependent Claim
42 words
A continuous casting machine as claimed in claim 7 wherein the metal body is an apertured plate and the body of silicon nitride fits tightly into an enlarged portion of the aperture in the plate on the side thereof adjacent the mould.
Claim 12
Dependent Claim
20 words
A continuous casting machine as claimed in claim 7 wherein the silicon nitride plate is in engagement with the mould.
Claim 13
Dependent Claim
24 words
A continuous casting machine as claimed in claim 8 wherein the metal plate is bolted into engagement with an end face of the mould.
Claim 14
Dependent Claim
24 words
A continuous casting machine as claimed in claim 7 including refractory cement sealing the plate of silicon nitride to the body of refractory material.
Claim 15
Dependent Claim
44 words
A continuous casting machine as claimed in claim 7 wherein the aperture in the body of silicon nitride has larger cross-section dimensions on the side of the plate adjacent the mould than on the side of the plate adjacent the body of refractory material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |