US3269632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making helically wound pipes or tubes
Assignee: MILLAR
•
Filing: 1963-05-27
•
Granted: 1966-08-30
•
Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Groves John Creed
- 👤 Penrose James Ronald
- 👤 Millar John Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:20
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A MACHINE FOR FORMING HELICALLY WELDED PIPES OR TUBES OF STRIP MATERIAL COMPRISING A MANDREL HAVING A ROTATABLE PORTION AROUND WHICH THE STRIP IS FED, A RAISED SHOULDER FIXED IN POSITION AROUND A PORTION OF THE MANDREL AND EXTENDING FOR ONE HELICAL TURN, WELDING MEANS POSITIONED TO BUTT-WELD THE LEADING EDGE OF THE STRIP TO A PREVIOUSLY FORMED TUBE AT THE POINT WHERE IT CONTACTS THE TRAILING EDGE OF THE TUBE, AND DRIVE MEANS CONTINUOUSLY TO ROTATE THE TUBE IN THE DIRECTION TO TEND TO CAUSE THE HELICAL TURNS TO TIGHTEN AND TO ADVANCE THE TUBE THROUGH THE MACHINE; SAID DRIVE MEANS COMPRISING A FRICTION BELT SURROUNDING THE TUBE AND A DRIVING PULLEY FOR THE BELT, THE ANGLE BETWEEN THE PULLEY AXIS AND THE TUBE AXIS BEING ADJUSTABLE SO THAT THE AMOUNT BY WHICH THE TUBE IS FED FORWARD FOR EACH ROTATION OF THE BELT CAN BE ALTERED.
Claim 2
Dependent Claim
148 words
A MACHINE FOR FORMING HELICALLY WELDED PIPES OR TUBES OF STRIP MATERIAL COMPRISING A MANDREL HAVING A ROTATABLE PORTION AROUND WHICH THE STRIP IS FED, A RAISED SHOULDER FIXED IN POSITION AROUND A PORTION OF THE MANDREL AND EXTENDING FOR ONE HELICAL TURN, WELDING MEANS POSITIONED TO BUTT-WELD THE LEADING EDGE OF THE STRIP TO A PREVIOUSLY FORMED TUBE AT THE POINT WHERE IT CONTACTS THE TRAILING EDGE OF THE TUBE, AND DRIVE MEANS CONTINUOUSLY TO ROTATE THE TUBE IN THE DIRECTION TO TEND TO CAUSE THE HELICAL TURNS TO TIGHTEN AND TO ADVANCE THE TUBE THROUGH THE MACHINE; SAID DRIVE MEANS COMPRISING A FRICTION BELT SURROUNDING THE TUBE AND A DRIVING PULLEY FOR THE BELT, THE ANGLE BETWEEN THE PULLEY AXIS AND THE TUBE AXIS BEING ADJUSTABLE SO THAT THE AMOUNT BY WHICH THE TUBE IS FED FORWARD FOR EACH ROTATION OF THE BELT CAN BE ALTERED.
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 |