Patent US3845810A successfully refreshed from Google Patents.
US3845810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip casting apparatus
Assignee: Jones and Laughlin Steel Inc
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Filing: 1972-10-06
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Granted: 1974-11-05
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Expires: 1992-10-06
Abstract
Abstract An internally liquid cooled rotatable drum open to the atmosphere for continuously solidifying molten metal on its outer surface is provided with a coaxially rotating spider carrying rollers in radial slots which under the action of centrifugal force roll on the drum inner surface. The spider is rotated at a speed sufficient to throw a rotating layer of cooling liquid against the inside surface of the drum by centrifugal force, and the action of the rollers on the surface being cooled breaks up incipient film boiling.
Inventors
- 👤 C Gerding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:17
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0637; B22D11/068; B22D11/0682
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
Apparatus for continuously solidifying molten metal in the form of strip comprising a hollow cylindrical drum open to the atmosphere and positioned with its axis horizontal, means for introducing cooling liquid into the drum through an end thereof, means for rotating the drum at a speed below that to which cooling liquid is thrown against the inside surface of the drum by centrifugal force, means extending radially into the drum for withdrawing cooling liquid therefrom through an end thereof, and means for improving heat transfer from drum surface to cooling liquid comprising spider means rotatable inside the drum coaxially therewith, a plurality of drum surface contacting elements for breaking up incipient vapor and carried by the spider means and rotatable therewith, radial slot means for mounting the surface contacting elements in the spider means adapted and adjusted to permit radial displacement of the drum surface contacting elements from contact with the drum surface to a position spaced from the drum surface and means for rotating the spider means at a speed above that at which cooling liquid is thrown against the inside surface of the drum by centrifugal force.
Claim 2
Dependent Claim
189 words
Apparatus for continuously solidifying molten metal in the form of strip comprising a hollow cylindrical drum open to the atmosphere and positioned with its axis horizontal, means for introducing cooling liquid into the drum through an end thereof, means for rotating the drum at a speed below that to which cooling liquid is thrown against the inside surface of the drum by centrifugal force, means extending radially into the drum for withdrawing cooling liquid therefrom through an end thereof, and means for improving heat transfer from drum surface to cooling liquid comprising spider means rotatable inside the drum coaxially therewith, a plurality of drum surface contacting elements for breaking up incipient vapor and carried by the spider means and rotatable therewith, radial slot means for mounting the surface contacting elements in the spider means adapted and adjusted to permit radial displacement of the drum surface contacting elements from contact with the drum surface to a position spaced from the drum surface and means for rotating the spider means at a speed above that at which cooling liquid is thrown against the inside surface of the drum by centrifugal force.
Claim 3
Dependent Claim
20 words
Apparatus of claim 1 in which the drum surface contacting elements are contoured to create shear in the cooling liquid.
Claim 4
Dependent Claim
18 words
Apparatus of claim 1 in which the radial slot means have parallel sides open at their outer ends.
Claim 5
Dependent Claim
13 words
Apparatus of claim 1 in which the drum surface contacting elements are rollers.
Claim 6
Dependent Claim
21 words
Apparatus of claim 4 in which the radial slot means are semicircular at their inner ends and journal the rollers therein.
Claim 7
Dependent Claim
37 words
Apparatus of claim 1 in which the means for withdrawing cooling liquid from the drum extend through an end of the drum and the means for rotating the spider extend through the opposite end of the drum.
Claim 8
Dependent Claim
32 words
Apparatus of claim 6 in which the means for withdrawing cooling liquid from the drum are stationary and the inside end thereof is pivotally supported by the means for rotating the spider.
Claim 9
Dependent Claim
38 words
Apparatus of claim 1 including a hollow shaft of smaller diameter than the drum coaxial therewith through which the cooling liquid is introduced and withdrawn, the hollow shaft being open to the atmosphere at at least one end.
Claim 10
Dependent Claim
50 words
Apparatus of claim 8 in which the cooling liquid is introduced through one end of the hollow shaft, and including a pipe coaxial with the hollow shaft and exiting therefrom through the same end thereof through which the cooling liquid is introduced, the cooling liquid being withdrawn through the pipe.
Claim 11
Dependent Claim
21 words
Apparatus of claim 1 including means flexibly joining the drum end faces and rim so as to permit relative movement therebetween.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |