Patent US3423983A successfully refreshed from Google Patents.
US3423983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed mechanism for a hydrostatic extrusion system
Assignee: International Standard Electric Corp
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Filing: 1966-11-29
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Granted: 1969-01-28
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Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 John Lees
- 👤 Duncan Alexander Gunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:13
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/21; B21C23/007; B21C23/008; B21C33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A FEED MECHANISM FOR A HIGH-PRESSURE EXTRUSION SYSTEM, SAID MECHANISM COMPRISING: (A) FIRST MEANS DEFINING A FIRST CHAMBER; (B) AN EXTRUSION DIE ADJACENT ONE END OF SAID FIRST CHAMBER; (C) A FIRST SEAL UNIT ADJACENT THE OTHER END OF SAID FIRST CHAMBER; (D) SECOND MEANS DEFINING A SECOND CHAMBER HAVING A FIRST END ADJACENT SAID FIRST SEAL UNIT AND INCORPORATING SAID FIRST SEAL UNIT INTO A COMMON WALL OF SAID SECOND MEANS BETWEEN SAID SECOND CHAMBER AND SAID FIRST CHAMBER, SAID SECOND MEANS FURTHER INCLUDING A PISTON RECIPROCABLE WITH RESPECT TO SAID FIRST SEAL UNIT; (E) A SECOND SEAL UNIT AT THE END OF AID SECOND CHAMBER OPPOSITE SAID FIRST SEAL UNIT AND CARRIED BY SAID PISTON, SAID FIRST AND SAID SECOND SEAL UNITS HAVING RESPECTIVE OPENINGS THERETHROUGH FOR ACCOMMODATING MATERIAL WHICH IS TO BE EXTRUDED; (F) MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID SECOND CHAMBER; AND (G) MEANS FOR CAUSING RECIPROCATION OF SAID PISTON.
Claim 2
Dependent Claim
156 words
A FEED MECHANISM FOR A HIGH-PRESSURE EXTRUSION SYSTEM, SAID MECHANISM COMPRISING: (A) FIRST MEANS DEFINING A FIRST CHAMBER; (B) AN EXTRUSION DIE ADJACENT ONE END OF SAID FIRST CHAMBER; (C) A FIRST SEAL UNIT ADJACENT THE OTHER END OF SAID FIRST CHAMBER; (D) SECOND MEANS DEFINING A SECOND CHAMBER HAVING A FIRST END ADJACENT SAID FIRST SEAL UNIT AND INCORPORATING SAID FIRST SEAL UNIT INTO A COMMON WALL OF SAID SECOND MEANS BETWEEN SAID SECOND CHAMBER AND SAID FIRST CHAMBER, SAID SECOND MEANS FURTHER INCLUDING A PISTON RECIPROCABLE WITH RESPECT TO SAID FIRST SEAL UNIT; (E) A SECOND SEAL UNIT AT THE END OF AID SECOND CHAMBER OPPOSITE SAID FIRST SEAL UNIT AND CARRIED BY SAID PISTON, SAID FIRST AND SAID SECOND SEAL UNITS HAVING RESPECTIVE OPENINGS THERETHROUGH FOR ACCOMMODATING MATERIAL WHICH IS TO BE EXTRUDED; (F) MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID SECOND CHAMBER; AND (G) MEANS FOR CAUSING RECIPROCATION OF SAID PISTON.
References Cited (Backward Citations)
US3354685A
Cited
US3328998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |