US3752372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay-graphite spout
Assignee: Southwire Co LLC
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Filing: 1971-04-20
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Granted: 1973-08-14
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Expires: 1991-04-20
Abstract
Abstract A pouring spout for pouring molten metal in a continuous casting system, the composition of said pouring spout including, among other substances, graphite, clay, refractory oxides and other refractory materials, wherein the percentages of each substance vary within a specified range according to the purity of metal being poured. The internal configuration of the spout results in a closely controlled and consistent flow of molten metal.
Inventors
- 👤 F Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D11/00; B22D11/06; B22D11/0637; B22D11/064; B22D11/0642
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A pouring spout as defined in claim 1, wherein said spout has a generally tubular configuration with a bore extending from end to end and terminating in openings at each end of the spout, said bore being of a shape such that during pouring, molten metal completely fills the spout and never separates from its internal surface.
Claim 2
Dependent Claim
47 words
The pouring spout of claim 2 having a tapered bore with a rounded inlet, wherein the included angle of the bore is at least one degree and the radius of the rounded inlet is at least equal to the radius of the upper portion of the bore.
Claim 3
Dependent Claim
31 words
The pouring spout of claim 2 having a straight bore with a rounded inlet, wherein the radius of the rounded inlet is at least equal to the radius of the bore.
Claim 4
Dependent Claim
32 words
The pouring spout of claim 2 having an enlarged support shank comprising less than half the length of said spout, and situated at its upper end for insertion into a pouring pot.
Claim 5
Dependent Claim
148 words
A pouring spout assembly for pouring high temperature molten metal from a metal pouring pot, said pouring spout assembly comprising an elongated spout of generally tubular configuration having a bore extending from end-to-end and terminating in openings at each end of the spout, and an externally outwardly flared support shank formed at one end of the spout for insertion into a pouring pot such that the spout protrudes from the pouring pot and guides the flow of molten metal away from the pouring pot to a casting machine, said spout having a composition of from about 28 to about 70 percent carbon, from 0 to about 36 percent silica, from 0 to about 22 percent alumina, from 0 to about 52 percent silicon carbide, from 0 to about 20 percent silicon, from 0 to about 20 percent glaze, and from 0 to about 5 percent other refractory substances.
Claim 6
Dependent Claim
48 words
The pouring spout assembly of claim 6 having a tapered bore with a rounded inlet, wherein the included angle of the bore is at least one degree and the radius of the rounded inlet is at least equal to the radius of the upper portion of the bore.
Claim 7
Dependent Claim
32 words
The pouring spout assembly of claim 6 having a straight bore with a rounded inlet, wherein the radius of the rounded inlet is at least equal to the radius of the bore.
Claim 8
Dependent Claim
239 words
In combination, a metal pouring pot for high temperature molten metal and a pouring spout assembly associated therewith, said pouring spout assembly being of a length to guide the molten metal to a region located a substantial distance from said pot, said pouring spout assembly including an elongated spout of oxidation resistant material being of generally tubular configuration, including an enlarged, tapered support shank at the upper end of the pouring spout, which comprises less than half the length of the pouring spout, and combining with a complimentary tapered portion on the pouring pot to give a secure fit between the pouring spout and the pouring pot, a lower portion of said pouring spout assembly being exposed to the atmosphere and comprising over half the total length of the pouring spout assembly, said oxidation resistant materials having a composition of from about 28 to about 70 percent carbon, from 0 to about 36 percent silica, from 0 to about 22 percent alumina, from 0 to about 52 percent silicon carbide, from 0 to about 20 percent silicon, from 0 to about 20 percent glaze, and from 0 to about 5 percent other refractory substances, said pouring spout having a bore extEnding from end to end and terminating in openings at each end of the said spout, said bore being of a shape such that during pouring, molten metal completely fills the spout and never separates from its internal surface.
Claim 9
Dependent Claim
55 words
The combination metal pouring pot and pouring spout assembly of claim 9, wherein the pouring spout has a tapered bore with a rounded inlet, the included angle of the bore being at least 1* and the radius of the rounded inlet being at least equal to the radius of the upper portion of the bore.
Claim 10
Dependent Claim
41 words
The combination metal pouring pot and pouring spout assembly of claim 9, wherein the pouring spout has a straight bore with a rounded inlet and the radius of the rounded inlet is at least equal to the radius of the bore.
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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 |