Patent US3354681A successfully refreshed from Google Patents.
US3354681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube forming means and method
Assignee: LOMBARD CORP
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Filing: 1964-12-28
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Granted: 1967-11-28
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Daniel L Lombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:25
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/08; B21C23/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN APPARATUS FOR BENDING COLD TUBULAR MEMBERS, THE COMBINATION COMPRISING: A SUPPORT BLOCK HAVING AN OPENING WITHIN WHICH SAID TUBULAR MEMBER IS SUPPORTED; DIE MEANS TO ONE END OF SAID SUPPORT BLOCK WITHIN SAID OPENING FOR CAUSING SAID TUBULAR MEMBER TO BEND ALONG A DESIRED RADIUS, SAID DIE MEANS COMPRISING A TAPERED LAND WHOSE AXIALLY EXTENDING LINES OF CONTACT WITH SAID TUBULAR MEMBER VARY FROM A MINIMUM LENGTH AT A FIRST POINT ON SAID CIRCUMFERENCE TO A MAXIMUM LENGTH AT A SECOND POINT ON SAID CIRCUMFERENCE, SAID FIRST AND SECOND POINTS CORRESPONDING RESPECTIVELY TO AREAS OF MAXIMUM AND MINIMUM FRICTIONAL DRAG; SAID TUBULAR MEMBER BENDING ABOUT SAID FIRST POINT DURING EXTRUSION THEREOF; AND MEANS FOR FORCIBLY MOVING SAID TUBULAR MEMBER THROUGH SAID DIE MEANS.
Claim 2
Dependent Claim
124 words
IN APPARATUS FOR BENDING COLD TUBULAR MEMBERS, THE COMBINATION COMPRISING: A SUPPORT BLOCK HAVING AN OPENING WITHIN WHICH SAID TUBULAR MEMBER IS SUPPORTED; DIE MEANS TO ONE END OF SAID SUPPORT BLOCK WITHIN SAID OPENING FOR CAUSING SAID TUBULAR MEMBER TO BEND ALONG A DESIRED RADIUS, SAID DIE MEANS COMPRISING A TAPERED LAND WHOSE AXIALLY EXTENDING LINES OF CONTACT WITH SAID TUBULAR MEMBER VARY FROM A MINIMUM LENGTH AT A FIRST POINT ON SAID CIRCUMFERENCE TO A MAXIMUM LENGTH AT A SECOND POINT ON SAID CIRCUMFERENCE, SAID FIRST AND SECOND POINTS CORRESPONDING RESPECTIVELY TO AREAS OF MAXIMUM AND MINIMUM FRICTIONAL DRAG; SAID TUBULAR MEMBER BENDING ABOUT SAID FIRST POINT DURING EXTRUSION THEREOF; AND MEANS FOR FORCIBLY MOVING SAID TUBULAR MEMBER THROUGH SAID DIE MEANS.
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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |