Patent US3559436A successfully refreshed from Google Patents.
US3559436A
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US
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Press for hydrostatic extrusion
Assignee: ABB Norden Holding AB
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Filing: 1968-10-28
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Granted: 1971-02-02
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Expires: 1988-10-28
Abstract
Abstract A HYDRAULIC PRESS HAS A MAIN OPERATING CYLINDER WITH AN OPERATING PISTON SLIDABLE THEREIN AND AN EXTRUSION CYLINDER WITH A DIE AT ONE END AND AN EXTRUDING PISTON RIGID WITH THE OPERATING PISTON ENTERING THE OTHER END. THE EXTRUSION CYLINDER HAS A SHEATH WOUND AROUND IT, END PIECES ENCLOSING THE SHEATH AND SEALS BETWEEN THE END PIECES AND THE ENDS OF THE EXTRUSION CYLINDER. A RING ENGAGING THE UPPER END PIECE IS PRESSED DOWNWARD AGAINST IT BY AUXILIARY PISTONS SLIDABLE IN CYLINDERS FORMED IN THE OPERATING PISTON TO COMPRESS THE SEALS BETWEEN THE END PIECES AND THE ENDS OF THE CYLINDER.
Inventors
- 👤 Jan Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:09
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/21; B21C23/211; B21C23/007; F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 0
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References 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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |