US3920064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandrel for continuous casting of hollow ingots
Assignee: Individual
•
Filing: 1973-05-08
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Granted: 1975-11-18
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Expires: 1993-05-08
Abstract
Abstract A downwardly tapered section of a mandrel is given a coating of a metal whose coefficient of thermal conductivity is lower than that of the metal from which the mandrel is manufactured. The thickness of the coating diminishes uniformly downwardly along the length of the tapered section the mandrel in the direction of motion of a downwardly conveyed ingot, the ratio of the thickness of the coating at the upper end of the tapered section relative to the thickness of the coating at the lower end thereof ranging from 1:50 to 1:150.
Inventors
- 👤 Vitaly Yakovlevich Genkin
- 👤 Vladimir Borisovich Gankin
- 👤 Alexandr Georgievich Budkevich
- 👤 Vladimir Efremovich Sirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:37
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A mandrel for the continuous casting of downwardly conveyed hollow ingots comprising a downwardly tapered section located in the zone of contact with liquid metal and having a coating of a metal provided on the tapEred section whose coefficient of thermal conductivity is lower than that of the metal from which said mandrel is manufactured, with the thickness of said coating diminishing uniformly from the upper end of the tapered section along the length of the mandrel to the lower end thereof in the direction of downward motion of the ingot, the ratio of the thickness of the coating at the upper end of the tapered section relative to the thickness of the coating at the lower end thereof ranging from 1:50 to 1:150.
Claim 2
Dependent Claim
124 words
A mandrel for the continuous casting of downwardly conveyed hollow ingots comprising a downwardly tapered section located in the zone of contact with liquid metal and having a coating of a metal provided on the tapEred section whose coefficient of thermal conductivity is lower than that of the metal from which said mandrel is manufactured, with the thickness of said coating diminishing uniformly from the upper end of the tapered section along the length of the mandrel to the lower end thereof in the direction of downward motion of the ingot, the ratio of the thickness of the coating at the upper end of the tapered section relative to the thickness of the coating at the lower end thereof ranging from 1:50 to 1:150.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |