Patent US611875A successfully refreshed from Google Patents.
US3227345A
Expired / Lapsed
US
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Apparatus for feeding strip stock to a helical seam pipe making machine
Assignee: DRIAM SA
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Filing: 1962-12-31
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Granted: 1966-01-04
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Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Eckhardt Vilem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
AN APPARATUS FOR FEEDING STRIP STOCK TO A HELICAL SEAM PIPE MAKING MACHINE BY MEANS OF FEED ROLLERS, SAID APPARATUS COMPRISING AT LEAST TWO PAIRS OF SAID ROLLERS, EACH OF SAID ROLLERS HAVING A WIDTH CONSIDERABLY SMALLER THAN THE MAXIMUM WIDTH OF THE VARIOUS STRIPS OF SAID STRIP STOCK TO BE WORKED UPON, AT LEAST ONE ROLLER OF EACH PAIR BEING ADAPTED TO BE DRIVEN, MEANS FOR DRIVING EACH DRIVEN ROLLER SEPARATELY AT A CONSTANT BUT ADJUSTABLE TORQUE, AND MEANS FOR PRESSING THE ROLLERS OF EACH PAIR AGAINST EACH OTHER AT A CONSTANT BUT ADJUSTABLE PRESSURE SO AS TO REMAIN IN CONSTANT ENGAGEMENT WITH SAID STRIP STOCK WITHOUT SLIPPING RELATIVE THERETO, SAID MEANS FOR DRIVING EACH DRIVEN ROLLER COMPRISING A SEPARATE HYDRAULIC MOTOR, PUMP MEANS, ALL SAID HYDRAULIC MOTORS BEING CONNECTED IN PARALLEL TO SAID PUMP MEANS, SAID HYDRAULIC MOTORS OPERATING WITHIN A SPEED RANGE IN WHICH THE TORQUE REMAINS CONTANT, AND SAID MEANS FOR PRESSING THE ROLLERS OF EACH PAIR COMPRISING HYDRAULIC MEANS.
Claim 2
Independent Claim
164 words
AN APPARATUS FOR FEEDING STRIP STOCK TO A HELICAL SEAM PIPE MAKING MACHINE BY MEANS OF FEED ROLLERS, SAID APPARATUS COMPRISING AT LEAST TWO PAIRS OF SAID ROLLERS, EACH OF SAID ROLLERS HAVING A WIDTH CONSIDERABLY SMALLER THAN THE MAXIMUM WIDTH OF THE VARIOUS STRIPS OF SAID STRIP STOCK TO BE WORKED UPON, AT LEAST ONE ROLLER OF EACH PAIR BEING ADAPTED TO BE DRIVEN, MEANS FOR DRIVING EACH DRIVEN ROLLER SEPARATELY AT A CONSTANT BUT ADJUSTABLE TORQUE, AND MEANS FOR PRESSING THE ROLLERS OF EACH PAIR AGAINST EACH OTHER AT A CONSTANT BUT ADJUSTABLE PRESSURE SO AS TO REMAIN IN CONSTANT ENGAGEMENT WITH SAID STRIP STOCK WITHOUT SLIPPING RELATIVE THERETO, SAID MEANS FOR DRIVING EACH DRIVEN ROLLER COMPRISING A SEPARATE HYDRAULIC MOTOR, PUMP MEANS, ALL SAID HYDRAULIC MOTORS BEING CONNECTED IN PARALLEL TO SAID PUMP MEANS, SAID HYDRAULIC MOTORS OPERATING WITHIN A SPEED RANGE IN WHICH THE TORQUE REMAINS CONTANT, AND SAID MEANS FOR PRESSING THE ROLLERS OF EACH PAIR COMPRISING HYDRAULIC MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |