US3155139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandrel apparatus for tube bending
Assignee: Baldwin Lima Hamilton Corp
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Filing: 1961-09-25
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Granted: 1964-11-03
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Charles F Hautau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:02
CPC Classifications
B; B21; B21D; B21D9/00; B21D9/05; B21D9/07; B21D9/055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A MACHINE FOR BENDING TUBING HAVING MEANS FOR MAINTAINING A PORTION OF SAID TUBING IN A STATIONARY POSITION DURING BENDING, THE IMPROVEMENT FOR FEEDING A MANDREL INTO THE INTERIOR OF SAID TUBING TO SUPPORT THE INTERIOR WALLS OF SAID TUBING AT THE POINT OF BENDING, COMPRISING: A FLEXIBLE ELONGATED MEMBER DISPOSED AND MOVABLE ALONG THE AXIS OF SAID PORTION OF SAID TUBING, SAID MEMBER HAVING AN OUTER DIAMETER SMALLER THAN THE INSIDE DIAMETER OF SAID TUBING; A MANDREL FIXED AT ONE END OF SAID MEMBER; POWER MEANS FOR RETRACTING SAID MEMBER TO A POSITION EXTERIOR OF SAID TUBING, AND FOR EXTENDING SAID
Claim 2
Dependent Claim
103 words
IN A MACHINE FOR BENDING TUBING HAVING MEANS FOR MAINTAINING A PORTION OF SAID TUBING IN A STATIONARY POSITION DURING BENDING, THE IMPROVEMENT FOR FEEDING A MANDREL INTO THE INTERIOR OF SAID TUBING TO SUPPORT THE INTERIOR WALLS OF SAID TUBING AT THE POINT OF BENDING, COMPRISING: A FLEXIBLE ELONGATED MEMBER DISPOSED AND MOVABLE ALONG THE AXIS OF SAID PORTION OF SAID TUBING, SAID MEMBER HAVING AN OUTER DIAMETER SMALLER THAN THE INSIDE DIAMETER OF SAID TUBING; A MANDREL FIXED AT ONE END OF SAID MEMBER; POWER MEANS FOR RETRACTING SAID MEMBER TO A POSITION EXTERIOR OF SAID TUBING, AND FOR EXTENDING SAID
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |