Manufacture of cylindrical bodies from metal powder
Abstract
Abstract A GENERALLY CYCLINDRICAL BODY SUCH AS THE ROLL FOR A ROLLING MILL OR CALENDER IS MANUFACTURED FROM AT LEAST TWO METALLIC POWDERS. THE POWDERS ARE INTRODUCED INTO DIFFERENT PARTS OF A THIN-WALLED MOULD AND THE MOULD AND THE POWDER THEREIN ARE COMPACTED TO COMPACT THE POWDER INTO A SOLID BODY AND THE COMPACTED POWDER IS SINTERED. IT IS PREFERABLY FOR ONE OF THE POWDERS INTRODUCED INTO THE MOULD TO CONSTITUTE A CORE WHICH IS SURROUNDED BY THE OTHER POWDER OR POWDERS. TO INTRODUCE THE POWDERS INTO THE MOULD IT IS PREFERRED FOR THE MOULD TO BE ROTATED ABOUT ITS LONGITUDINAL AXIS WITH ONE OF THE POWDERS INTRODUCE INTO THE MOULD TO FORM A LAYER ON THE INNER LONGITUDINALLY EXTRUDING WALL OF THE MOULD AND THE SECOND POWDER IS INTRODUCED INTO THE MOULD TO FORM THE CORE. THE COMPACTION PROCESS MAY BE A HOT OR COLD ISOSTATIC COMPACTION PROCESS.
Inventors
- 👤 Peter Alexander Edward Jump
- 👤 Barclay Keegan
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |