Patent US3873259A successfully refreshed from Google Patents.
US3873259A
Expired / Lapsed
US
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Mold segment
Assignee: United States Steel Corp
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Filing: 1973-12-07
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Granted: 1975-03-25
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Expires: 1993-12-07
Abstract
Abstract Roll-type briquetting machines employed for high temperature operations such as in the compaction and briquette making of heated, reduced iron ore are cooled by the use of a flexible internal cooling system employing water. The flexibility of the machine requires that mold segments be removable from the rolls. This system provides means for circulating water through the roll segments from a common source and maintaining uniform temperature on the surface of each segment on the rolls.
Inventors
- 👤 Frank Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:40
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/34; B30B11/00; B30B11/16; B30B11/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A mold segment comprising a generally V-shaped steel element having a mold surface opposite the point of the V and including at least three transverse holes for effecting the circulation of cooling water, said holes being spaced by distances at least three-fourths of their diameter and less than two times their diameter, the distance from the hole to the mold surface throughout the length of the hole being at least the distance between holes and no more than three times that distance.
Claim 2
Dependent Claim
82 words
A mold segment comprising a generally V-shaped steel element having a mold surface opposite the point of the V and including at least three transverse holes for effecting the circulation of cooling water, said holes being spaced by distances at least three-fourths of their diameter and less than two times their diameter, the distance from the hole to the mold surface throughout the length of the hole being at least the distance between holes and no more than three times that distance.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |