US3095083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for correcting tubing eccentricity by drawing
Assignee: Babcock and Wilcox Co
•
Filing: 1958-11-03
•
Granted: 1963-06-25
•
Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Chalmers L Helble
- 👤 Frank L Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:00
CPC Classifications
B; B21; B21C; B21C1/00; B21C1/16; B21C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF INCREASING BY A PRE-SELECTED MAXIMUM AMOUNT THE WALL THICKNESS OF A METAL TUBE THROUGH A SELECTED ARC OF THE TUBE CIRCUMFRENCE, COMPRISING THE STEPS OF DRAWING THE TUBE THROUGH AN ANNULAR REDUCING DIE, HAVING A FLARED ENTRY THROAT, TO REDUCE THE TUBE DIAMETER; AND, DURING SUCH DRAWING, SELECTIVELY TILTING THE DIE SO THAT THE DIE AXIS INTERSECTS THE AXIS OF THE TUBE ENTERING THE DIE AT AN ANGLE PROPORTIONAL TO SUCH PRE-SELECTED AMOUNT TO EXERT ON THE TUBE WALL WITHIN SAID SELECTED ARC A RADIAL UNIT PRESSURE GREATER THAN THAT EXERTED ON THE REMAINING PORTION OF THE TUBE CIRCUMFRENCE, BY VIRTUE OF THE ANGULAR RELATION OF THE FLARED ENTRY THROAT AND ENTERING TUBE AXES, TO CROWD METAL OF THE TUBE WALL, WITHIN SUCH SELECTED ARC, CIRCUMFERENTIALLY OF THE TUBE TO INCREASE THE TUBE WALL THICKNESS WITHIN SAID SELECTED ARC.
Claim 2
Independent Claim
142 words
A METHOD OF INCREASING BY A PRE-SELECTED MAXIMUM AMOUNT THE WALL THICKNESS OF A METAL TUBE THROUGH A SELECTED ARC OF THE TUBE CIRCUMFRENCE, COMPRISING THE STEPS OF DRAWING THE TUBE THROUGH AN ANNULAR REDUCING DIE, HAVING A FLARED ENTRY THROAT, TO REDUCE THE TUBE DIAMETER; AND, DURING SUCH DRAWING, SELECTIVELY TILTING THE DIE SO THAT THE DIE AXIS INTERSECTS THE AXIS OF THE TUBE ENTERING THE DIE AT AN ANGLE PROPORTIONAL TO SUCH PRE-SELECTED AMOUNT TO EXERT ON THE TUBE WALL WITHIN SAID SELECTED ARC A RADIAL UNIT PRESSURE GREATER THAN THAT EXERTED ON THE REMAINING PORTION OF THE TUBE CIRCUMFRENCE, BY VIRTUE OF THE ANGULAR RELATION OF THE FLARED ENTRY THROAT AND ENTERING TUBE AXES, TO CROWD METAL OF THE TUBE WALL, WITHIN SUCH SELECTED ARC, CIRCUMFERENTIALLY OF THE TUBE TO INCREASE THE TUBE WALL THICKNESS WITHIN SAID SELECTED ARC.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |