Patent US3286503A successfully refreshed from Google Patents.
US3286503A
Expired / Lapsed
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Method of bending tubing and mandrel component thereof
Assignee: Individual
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Filing: 1964-01-27
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Granted: 1966-11-22
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 James L Garrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:40
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/01; B21D9/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A BENDING MANDREL FOR PLACEMENT IN A METAL TUBING TO BE BENT, A FLEXIBLE SECTION OF ARTICULATED ELEMENTS COMPRISING A SERIES OF LINKS ARRANGED IN JUXTAPOSITION, AN ENLARGED FLARING PORTION ON EACH OF SAID LINKS DEFINING A RECESS, SAID RECESS HAVING A GROOVE THEREIN, A SPLIT-LINK BALL HAVING AN ANNULAR CIRCUMFERENTIALLY DISPOSED GROOVE THEREIN, ON EACH LINK OF SAID SERIES OF LINKS, A LINK BALL RING MOUNTED ON EACH OF SAID SPLIT-LINK BALLS FOR RECEPTION IN SAID ANNULAR GROOVE OF EACH LINK BALL AND SAID GROOVE OF EACH SAID RECESS TO LATCH SAID ARTICULATED ELEMENTS IN A SUBSTANTIALLY STRAIGHT LINE, AND A RIGID MANDREL BALL MOVABLY MOUNTED ON EACH ENLARGED PORTION OF EACH OF SAID LINKS FOR RELATIVE MOVEMENT BETWEEN THE MANDREL AND AN ENCOMPASSING METAL TUBING DURING BENDING OPERATIONS TO INHIBIT FORMATION OF LINKS OR CRIMPS IN THE INNER WALL OF THE METAL TUBING.
Claim 2
Dependent Claim
146 words
IN A BENDING MANDREL FOR PLACEMENT IN A METAL TUBING TO BE BENT, A FLEXIBLE SECTION OF ARTICULATED ELEMENTS COMPRISING A SERIES OF LINKS ARRANGED IN JUXTAPOSITION, AN ENLARGED FLARING PORTION ON EACH OF SAID LINKS DEFINING A RECESS, SAID RECESS HAVING A GROOVE THEREIN, A SPLIT-LINK BALL HAVING AN ANNULAR CIRCUMFERENTIALLY DISPOSED GROOVE THEREIN, ON EACH LINK OF SAID SERIES OF LINKS, A LINK BALL RING MOUNTED ON EACH OF SAID SPLIT-LINK BALLS FOR RECEPTION IN SAID ANNULAR GROOVE OF EACH LINK BALL AND SAID GROOVE OF EACH SAID RECESS TO LATCH SAID ARTICULATED ELEMENTS IN A SUBSTANTIALLY STRAIGHT LINE, AND A RIGID MANDREL BALL MOVABLY MOUNTED ON EACH ENLARGED PORTION OF EACH OF SAID LINKS FOR RELATIVE MOVEMENT BETWEEN THE MANDREL AND AN ENCOMPASSING METAL TUBING DURING BENDING OPERATIONS TO INHIBIT FORMATION OF LINKS OR CRIMPS IN THE INNER WALL OF THE METAL TUBING.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |