Patent US3243985A successfully refreshed from Google Patents.
US3243985A
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Extrusion apparatus
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1964-09-28
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Granted: 1966-04-05
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Green Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:25
CPC Classifications
B; B21; B21C; B21C25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
EXTRUSION APPARATUS FOR USE IN HYDROSTATIC EXTRUSION OF A WORKPIECE BY PRESSURIZATION OF HYDRAULIC LIQUID ABOUT THE WORKPIECE IN AN EXTRUSION CHAMBER, COMPRISING MEANS FORMING AN EXTRUSION CHAMBER, AN EXTRUSION DIE ASSEMBLY LOCATED AT ONE END OF THE EXTRUSION CHAMBER, SAID EXTRUSION DIE ASSEMBLY COMPRISING A DIE OF RESILIENTLY YIELDABLE MATERIAL CONTAINED IN A CLOSE FITTING CUP-SHAPED HOUSING OF NONDEFORMABLE MATERIAL, THE INNER END FACE OF THE DIE FACING THE INTERIOR OF THE EXTRUSION CHAMBER AT THE OPEN END OF THE CUP-SHAPED HOUSING, AND MEANS FOR TRANSMITTING PRESSURE FROM THE LIQUID PRESSURE APPLIED ON THE WORKPIECE IN THE EXTRUSION CHAMBER TO THE INNER END FACE OF THE DIE IN THE CUP-SHAPED HOUSING SO THAT THE DIE IS COMPRESSED LONGITUDINALLY IN THE HOUSING AND THEREBY DEFORMED RADIALLY INWARDLY ABOUT THE WORKPIECE DURING EXTRUSION.
Claim 2
Dependent Claim
132 words
EXTRUSION APPARATUS FOR USE IN HYDROSTATIC EXTRUSION OF A WORKPIECE BY PRESSURIZATION OF HYDRAULIC LIQUID ABOUT THE WORKPIECE IN AN EXTRUSION CHAMBER, COMPRISING MEANS FORMING AN EXTRUSION CHAMBER, AN EXTRUSION DIE ASSEMBLY LOCATED AT ONE END OF THE EXTRUSION CHAMBER, SAID EXTRUSION DIE ASSEMBLY COMPRISING A DIE OF RESILIENTLY YIELDABLE MATERIAL CONTAINED IN A CLOSE FITTING CUP-SHAPED HOUSING OF NONDEFORMABLE MATERIAL, THE INNER END FACE OF THE DIE FACING THE INTERIOR OF THE EXTRUSION CHAMBER AT THE OPEN END OF THE CUP-SHAPED HOUSING, AND MEANS FOR TRANSMITTING PRESSURE FROM THE LIQUID PRESSURE APPLIED ON THE WORKPIECE IN THE EXTRUSION CHAMBER TO THE INNER END FACE OF THE DIE IN THE CUP-SHAPED HOUSING SO THAT THE DIE IS COMPRESSED LONGITUDINALLY IN THE HOUSING AND THEREBY DEFORMED RADIALLY INWARDLY ABOUT THE WORKPIECE DURING EXTRUSION.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |