US3268985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for bending structural members
Assignee: Individual
•
Filing: 1963-05-31
•
Granted: 1966-08-30
•
Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ralph G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:05
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49634; Y10T29/49764; Y10T29/49769; Y10T29/49789; Y10T29/49798; Y10T29/49826; Y10T29/49828
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
THE METHOD OF BENDING A STRUCTURAL MEMBER TO A PREDETERMINED CURVATURE WITHOUT THE APPLICATION OF HEAT AND IN A SINGLE PASS WHICH COMPRISES THE STEPS OF DIRECTING THE LEADING END OF SAID LENGTH OF STRUCTURAL MEMBER BETWEEN A PAIR OF CONTINUOUSLY DRIVEN ROLLS, ROTATING SAID ROLLS TO CAUSE SAID LEADING END TO BE PULLED THROUGH SAID ROLLS, THEREAFTER DIRECTING THE LEADING END OF SAID LENGTH BETWEEN AT LEAST THREE PAIR OF SPACED IDLER ROLLS, POSITIONING SAID FIRST PAIR OF IDLER ROLLS ADJACENT SAID FIRST PAIR OF DRIVE ROLLS WITH THE AXES OF SAID ROLLS LYING IN A PLANE SUCH THAT THE LENGTH OF THE STRUCTURAL MEMBER BETWEEN THE FIRST PAIR OF DRIVE ROLLS AND THE FIRST PAIR OF IDLER ROLLS TENDS TO ASSUME A PARABOLIC CURVATURE, DIRECTING THE LEADING END OF SAID LENGTH AFTER PASSAGE THROUGH SAID PAIRS OF IDLER ROLLS BETWEEN A SECOND PAIR OF DRIVEN ROLLS, ROTATING SAID SECOND PAIR OF DRIVEN ROLLS AT SUBSTANTIALLY THE SAME PERIPHERAL SPEED AS SAID FIRST PAIR OF DRIVEN ROLLS, AND POSITIONING SAID SECOND PAIR OF DRIVEN ROLLS WITH RELATION TO SAID LAST PAIR OF IDLER ROLLS SUCH THAT THE LENGTH OF STRUCTURAL MEMBER ASSUMES THE DESIRED CONFIGURATION BETWEEN SAID SECOND PAIR OF DRIVEN ROLLS AND SAID LAST PAIR OF IDLER ROLLS.
Claim 2
Independent Claim
210 words
THE METHOD OF BENDING A STRUCTURAL MEMBER TO A PREDETERMINED CURVATURE WITHOUT THE APPLICATION OF HEAT AND IN A SINGLE PASS WHICH COMPRISES THE STEPS OF DIRECTING THE LEADING END OF SAID LENGTH OF STRUCTURAL MEMBER BETWEEN A PAIR OF CONTINUOUSLY DRIVEN ROLLS, ROTATING SAID ROLLS TO CAUSE SAID LEADING END TO BE PULLED THROUGH SAID ROLLS, THEREAFTER DIRECTING THE LEADING END OF SAID LENGTH BETWEEN AT LEAST THREE PAIR OF SPACED IDLER ROLLS, POSITIONING SAID FIRST PAIR OF IDLER ROLLS ADJACENT SAID FIRST PAIR OF DRIVE ROLLS WITH THE AXES OF SAID ROLLS LYING IN A PLANE SUCH THAT THE LENGTH OF THE STRUCTURAL MEMBER BETWEEN THE FIRST PAIR OF DRIVE ROLLS AND THE FIRST PAIR OF IDLER ROLLS TENDS TO ASSUME A PARABOLIC CURVATURE, DIRECTING THE LEADING END OF SAID LENGTH AFTER PASSAGE THROUGH SAID PAIRS OF IDLER ROLLS BETWEEN A SECOND PAIR OF DRIVEN ROLLS, ROTATING SAID SECOND PAIR OF DRIVEN ROLLS AT SUBSTANTIALLY THE SAME PERIPHERAL SPEED AS SAID FIRST PAIR OF DRIVEN ROLLS, AND POSITIONING SAID SECOND PAIR OF DRIVEN ROLLS WITH RELATION TO SAID LAST PAIR OF IDLER ROLLS SUCH THAT THE LENGTH OF STRUCTURAL MEMBER ASSUMES THE DESIRED CONFIGURATION BETWEEN SAID SECOND PAIR OF DRIVEN ROLLS AND SAID LAST PAIR OF IDLER ROLLS.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |