US3910342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molds for continuous casting
Assignee: Individual
•
Filing: 1973-11-12
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Granted: 1975-10-07
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Expires: 1993-11-12
Abstract
Abstract A casting mold for continuous casting machines having a rectangular mold passage extending therethrough for casting strands of rectangular cross section such as slabs, billets and the like in which the surfaces of at least two of the opposed walls of the mold passage are convex in cross section, and in which the radius of curvature of said convex surfaces is progressively greater at successively lower levels of the mold passage in order to prolong contact between the strand and the mold walls.
Inventors
- 👤 Lyle J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:55
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0602; B22D11/04; B22D11/0406
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
A continuous casting mold for casting steel strands of substantially rectangular cross section, said mold having a substantially rectangular mold passage extending therethrough, a major portion of the surfaces of at least two of the opposed walls of said mold passage being convex in transverse cross section, the radius of curvature of said convex surfaces being progressively greater at successively lower cross sections through the mold wall.
Claim 2
Dependent Claim
67 words
A continuous casting mold for casting steel strands of substantially rectangular cross section, said mold having a substantially rectangular mold passage extending therethrough, a major portion of the surfaces of at least two of the opposed walls of said mold passage being convex in transverse cross section, the radius of curvature of said convex surfaces being progressively greater at successively lower cross sections through the mold wall.
Claim 3
Dependent Claim
37 words
A mold according to claim 1 in which the said mold passage has two opposed long sides and two opposed short sides and in which the surfaces of the opposed long sides are convex in cross section.
Claim 4
Dependent Claim
28 words
A mold according to claim 1 in which the length of the perimeter of the mold passage decreases progressively at successively lower cross sections through the mold wall.
Claim 5
Dependent Claim
23 words
A mold according to claim 1 in which the radius of curvature of said surfaces is infinite at the bottom of the mold.
Claim 6
Dependent Claim
51 words
A mold according to claim 3 in which the decreases in the length of the perimeter of the mold passage at successively lower cross sections through the mold wall conform to the decreases in the length of the perimeter of the casting at successively lower cross sections through the mold wall.
References Cited (Backward Citations)
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Cited
US3580328A
Cited
US3628596A
Cited
US3766962A
Cited
US3765472A
Cited
US3774671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |