Patent US3289451A successfully refreshed from Google Patents.
US3289451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming internal helical ribbing in a tube
Assignee: Babcock and Wilcox Co
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Filing: 1964-05-22
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Granted: 1966-12-06
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Paul H Koch
- 👤 John R Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:23
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
TUBE DRAWING APPARATUS COMPRISING A DRAW BENCH, A DIE SUPPORTED ON SAID BENCH, A SPIRAL-GROOVED MANDREL, A BAR FOR SUPPORTING SAID MANDREL IN OPERATIVE ASSOCIATION WITH SAID DIE, A DEVICE MOVABLY SUPPORTED ON SAID BENCH FOR PULLING TUBING THROUGH A PASSAGEWAY DEFINED BY SAID DIE AND SAID MANDREL, A CHUCK ROTATABLY SUPPORTED ON SAID BENCH AND ADAPTED TO GRIP SAID BAR FOR ROTATION THEREWITH, A MOTOR, A CHAIN GEAR SYSTEM INCLUDING A CHAIN FOR TRANSMITTING UNIDIRECTIONAL ROTATIONAL MOTION FROM SAID MOTOR TO SAID CHUCK AND FURTHER INCLUDING A PAIR OF HORIZONTALLY SPACED IDLER WHEELS SPANNED BY A PORTION OF SAID CHAIN, AND A FREELY ROTATABLE WEIGHT SUSPENDED FROM SAID PORTION OF SAID CHAIN FOR TRANSMITTING SAID WEIGHT THROUGH SAID CHAIN TO APPLY A TORQUE THROUGH SAID CHUCK TO SAID BAR AND SAID MANDREL.
Claim 2
Dependent Claim
133 words
TUBE DRAWING APPARATUS COMPRISING A DRAW BENCH, A DIE SUPPORTED ON SAID BENCH, A SPIRAL-GROOVED MANDREL, A BAR FOR SUPPORTING SAID MANDREL IN OPERATIVE ASSOCIATION WITH SAID DIE, A DEVICE MOVABLY SUPPORTED ON SAID BENCH FOR PULLING TUBING THROUGH A PASSAGEWAY DEFINED BY SAID DIE AND SAID MANDREL, A CHUCK ROTATABLY SUPPORTED ON SAID BENCH AND ADAPTED TO GRIP SAID BAR FOR ROTATION THEREWITH, A MOTOR, A CHAIN GEAR SYSTEM INCLUDING A CHAIN FOR TRANSMITTING UNIDIRECTIONAL ROTATIONAL MOTION FROM SAID MOTOR TO SAID CHUCK AND FURTHER INCLUDING A PAIR OF HORIZONTALLY SPACED IDLER WHEELS SPANNED BY A PORTION OF SAID CHAIN, AND A FREELY ROTATABLE WEIGHT SUSPENDED FROM SAID PORTION OF SAID CHAIN FOR TRANSMITTING SAID WEIGHT THROUGH SAID CHAIN TO APPLY A TORQUE THROUGH SAID CHUCK TO SAID BAR AND SAID MANDREL.
References Cited (Backward Citations)
GB916650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |