US3092056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming welded helical seam tubing from metal strip
Assignee: American Pipe and Construction Co
•
Filing: 1959-01-30
•
Granted: 1963-06-04
•
Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Burl B Ohnstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN APPARATUS FOR FABRICATING HELICAL SEAM CYLINDRICAL TUBING FROM METAL STRIP BY FORMING THE STRIP INTO A HELIX AND WELDING THE SEAMS INCLUDING MANDREL MEANS FOR INITIALLY BENDING THE STRIP, GUIDE MEANS ENGAGED BY THE STRIP AFTER BEING INITIALLY BENT, COMPRISING A SUPPORT, A FRAME UNIT MOUNTED ON SAID SUPPORT, A MAIN ARM STRUCTURE PIVOTALLY ADJUSTABLE ON SAID FRAME UNIT ABOUT AN AXIS PARALLEL TO THE AXIS OF THE TUBING BEING FORMED, SECONDARY ARM STRUCTURES INDEPENDENTLY PIVOTALLY ADJUSTABLE ON SAID MAIN ARM STRUCTURE ABOUT AN AXIS PARALLEL TO THE TUBING BEING FORMED, AND SPACED FROM THE PIVOTAL AXIS OF THE MAIN ARM STRUCTURE AND ROLLERS CARRIED BY SAID SECONDARY ARM STRUCTURES REMOTE FROM THEIR PIVOTAL AXES.
Claim 2
Dependent Claim
116 words
IN APPARATUS FOR FABRICATING HELICAL SEAM CYLINDRICAL TUBING FROM METAL STRIP BY FORMING THE STRIP INTO A HELIX AND WELDING THE SEAMS INCLUDING MANDREL MEANS FOR INITIALLY BENDING THE STRIP, GUIDE MEANS ENGAGED BY THE STRIP AFTER BEING INITIALLY BENT, COMPRISING A SUPPORT, A FRAME UNIT MOUNTED ON SAID SUPPORT, A MAIN ARM STRUCTURE PIVOTALLY ADJUSTABLE ON SAID FRAME UNIT ABOUT AN AXIS PARALLEL TO THE AXIS OF THE TUBING BEING FORMED, SECONDARY ARM STRUCTURES INDEPENDENTLY PIVOTALLY ADJUSTABLE ON SAID MAIN ARM STRUCTURE ABOUT AN AXIS PARALLEL TO THE TUBING BEING FORMED, AND SPACED FROM THE PIVOTAL AXIS OF THE MAIN ARM STRUCTURE AND ROLLERS CARRIED BY SAID SECONDARY ARM STRUCTURES REMOTE FROM THEIR PIVOTAL AXES.
References Cited (Backward Citations)
US778472A
Cited
US1288576A
Cited
US1288134A
Cited
US1659792A
Cited
GB264620A
Cited
US1915029A
Cited
US1884658A
Cited
GB554520A
Cited
US2554555A
Cited
US2635572A
Cited
US2729180A
Cited
US2693779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |