US3347079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-hole extrusion
Assignee: Atlantic Richfield Co
•
Filing: 1965-06-24
•
Granted: 1967-10-17
•
Expires: 1985-06-24
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Rowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:13
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/08; B21C23/085; B21C25/00; B21C37/00; B21C37/06; B21C37/15; B21C37/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN EXTRUSION APPARATUS FOR EXTRUDING ELONGATED MEMBERS HAVING AT LEAST TWO LONGITUDINAL HOLES EXTENDING THERETHROUGH FROM TUBULAR BILLETS, HAVING A BILLET CHAMBER, A FIXED MANDREL EXTENDING THROUGH THE BILLET CHAMBER, AND AN EXTRUSION RAM, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING AT LEAST TWO MANDREL NIBS FIXED TO THE END OF THE MANDREL AND EXTENDING THEREFROM SPACED FROM EACH OTHER, DUMMY BLOCK MEANS ASSOCIATED WITH SAID EXTRUSION RAM HAVING AN INSIDE DIAMETER SLIGHTLY LARGER THAN THE INSIDE DIAMETER OF THE BULLEWT FOR PRESSING THE BILLET THROUGH THE DIE AND SHEARING A MAJOR PORTION OF THE BILLET FROM AN INNER SHELL PORTION WHICH IS RETAINED ON THE FIXED MANDREL, AND DIE MEANS IN WHICH SAID NIBS ARE POSITIONED FOR GUIDING SERVERAL STREAMS OF UPSET METAL TO UNIT BETWEEN THE NIBS TO FORM A UNITARY ELONGATED EXTRUDED MEMBER WITH A METAL WELD BETWEEN SAID ELONGATED HOLES.
Claim 2
Dependent Claim
143 words
IN EXTRUSION APPARATUS FOR EXTRUDING ELONGATED MEMBERS HAVING AT LEAST TWO LONGITUDINAL HOLES EXTENDING THERETHROUGH FROM TUBULAR BILLETS, HAVING A BILLET CHAMBER, A FIXED MANDREL EXTENDING THROUGH THE BILLET CHAMBER, AND AN EXTRUSION RAM, THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING AT LEAST TWO MANDREL NIBS FIXED TO THE END OF THE MANDREL AND EXTENDING THEREFROM SPACED FROM EACH OTHER, DUMMY BLOCK MEANS ASSOCIATED WITH SAID EXTRUSION RAM HAVING AN INSIDE DIAMETER SLIGHTLY LARGER THAN THE INSIDE DIAMETER OF THE BULLEWT FOR PRESSING THE BILLET THROUGH THE DIE AND SHEARING A MAJOR PORTION OF THE BILLET FROM AN INNER SHELL PORTION WHICH IS RETAINED ON THE FIXED MANDREL, AND DIE MEANS IN WHICH SAID NIBS ARE POSITIONED FOR GUIDING SERVERAL STREAMS OF UPSET METAL TO UNIT BETWEEN THE NIBS TO FORM A UNITARY ELONGATED EXTRUDED MEMBER WITH A METAL WELD BETWEEN SAID ELONGATED HOLES.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |