Patent US3208138A successfully refreshed from Google Patents.
US3208138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for adjusting the welding-gap width in a helicalseam tube-making installation
Assignee: DRIAM SA
•
Filing: 1962-09-24
•
Granted: 1965-09-28
•
Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 Eckhardt Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:26
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/032; B23K9/0325; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/122; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN THE MANUFACTURE OF A HELICAL-SEAM TUBE FROM A METALLIC BAND MATERIAL THAT IS SUPPLIED TO A FORMING TOOL AT AN ADJUSTABLE ANGLE AND THE EDGES OF WHICH ARE WELDED TOGETHER FOR THE FORMATION OF THE TUBE, WHEREUPON THE TUBE IS REMOVED BY WAY OF A GUIDE SYSTEM, AND IN WHICH THE ANGLE BETWEEN THE TUBE AXIS AND THE LINE CONNECTING THE CENTER POINTS OF CURVATURE OF THE CONCAVE SURFACES OF THE FORMING TOOL MAY BE CHANGED DURING TUBE MANUFACTURE, THE IMPROVEMENT ESSENTIALLY CONSISTING OF A METHOD FOR ADJUSTING THE WELDING GAP WIDTH COMPRISING THE STEPS OF MEASURING THE PRESSURE EXERTED ON THE GUIDE SYSTEM BY THE HELICAL-SEAM TUBE IN THE PLANE OF SUPPLY OF THE UNDEFORMED BAND, AND CONTROLLING THE CHANGE IN THE ANGLE BETWEEN THE TUBE AXIS AND THE TOOL AXIS IN ACCORDANCE WITH THE PRESSURE FLUCTUATIONS.
Claim 2
Dependent Claim
139 words
IN THE MANUFACTURE OF A HELICAL-SEAM TUBE FROM A METALLIC BAND MATERIAL THAT IS SUPPLIED TO A FORMING TOOL AT AN ADJUSTABLE ANGLE AND THE EDGES OF WHICH ARE WELDED TOGETHER FOR THE FORMATION OF THE TUBE, WHEREUPON THE TUBE IS REMOVED BY WAY OF A GUIDE SYSTEM, AND IN WHICH THE ANGLE BETWEEN THE TUBE AXIS AND THE LINE CONNECTING THE CENTER POINTS OF CURVATURE OF THE CONCAVE SURFACES OF THE FORMING TOOL MAY BE CHANGED DURING TUBE MANUFACTURE, THE IMPROVEMENT ESSENTIALLY CONSISTING OF A METHOD FOR ADJUSTING THE WELDING GAP WIDTH COMPRISING THE STEPS OF MEASURING THE PRESSURE EXERTED ON THE GUIDE SYSTEM BY THE HELICAL-SEAM TUBE IN THE PLANE OF SUPPLY OF THE UNDEFORMED BAND, AND CONTROLLING THE CHANGE IN THE ANGLE BETWEEN THE TUBE AXIS AND THE TOOL AXIS IN ACCORDANCE WITH THE PRESSURE FLUCTUATIONS.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |