US3629015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cooling thick steel plates
Assignee: Nippon Steel Corp
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Filing: 1969-03-17
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Granted: 1971-12-21
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Expires: 1989-03-17
Abstract
Abstract Method for cooling thick steel plates such as slabs and thick plates, while they are not on the rolling lane just after being hot rolled, by showers of cooling water supplied at a rate of 0.1 to 0.6 m.3 per m.2 of the plate per minute simultaneously over the top and bottom surfaces thereof.
Inventors
- 👤 Toshiya Yonezawa
- 👤 Hirokazu Sumitomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B45/0215; B21B45/0233
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
Method according to claim 1, wherein said cooling is carried out so that the shower hitting area of said top and bottom surfaces is more than 0.05 m.2 per m.2.
Claim 2
Dependent Claim
35 words
Method according to claim 2, wherein, said cooling is carried out so that the shower hitting area of said top surface of the thick steel plate is slightly smaller than that of said bottom surface.
Claim 3
Dependent Claim
27 words
Method according to claim 1, wherein said top surface of the thick steel plate is cooled with a smaller volume of cooling water than said bottom surface.
Claim 4
Dependent Claim
30 words
Method according to claim 1, wherein said cooling is carried out with said showers supplied at a pressure of more than 0.8 kg./cm.2 over said top and the bottom surfaces.
Claim 5
Independent Claim
69 words
A method for cooling hot-rolled steel plates having a thickness of more than 50 mm. which comprises cooling said plates by showers of cooling water supplied at a rate of 0.1 to 0.6 m.3 per m.2 of said plates per minute at a pressure of more than 0.8 kg./cm.2 evenly and simultaneously ovEr the top and bottom surfaces thereof with a shower hitting area of 0.05 m.2 per m2.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |