US3577619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing composite hardmetal rolls
Assignee: Sandvik AB
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Filing: 1969-05-12
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Granted: 1971-05-04
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Expires: 1989-05-12
Abstract
Abstract A method for manufacturing working rolls for rolling mills of the type formed by a roll core with a roll ring attached to the core, the roll ring being made of some hard material, such as hard metal or ceramic material. The roll ring is mounted with a clearance fit on the heated roll core and is secured thereto by pressure means which act axially against only the flat end surfaces of the roll ring, the pressure means imparting to the roll ring the force necessary for fixing and prestressing the ring so that it is capable of withstanding the rolling forces.
Inventors
- 👤 Per-Olof Strandel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
B; B21; B21B; B21B27/00; B21B27/02; B21B27/03; B21B27/035; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49547; Y10T29/49549; Y10T29/49552
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
29 words
The method of claim 1, in which the composite roll is heated in a furnace and the pressure means then additionally tightened against the ends of the roll sleeve.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |