Patent US3274819A successfully refreshed from Google Patents.
US3274819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging presses
Assignee: British Iron and Steel Research Association BISRA
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Filing: 1963-04-04
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Granted: 1966-09-27
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Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 Knowles Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:51
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/12; B21J13/00; B21J13/08; B21J13/10; B21J7/00; B21J7/20; B21J7/22; B21J7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A WORKPIECE MANIPULATOR FOR A FORGING PRESS, COMPRISING A CARRIAGE(9,10), CARRIAGE DRIVE MEANS (22-23) FOR CONTINUOUSLY DRIVING SAID CARRIAGE DURING A FORGING PASS, A PEEL (12) MOUNTED ON SAID CARRIAGE, AND PEEL DRIVE MEANS (30-39) FOR DRIVING SAID PEEL LONGITUDINALLY RELATIVE TO SAID CARRIAGE, SAID PEEL DRIVE MEANS COMPRISING A DOUBLE-ACTING PISTON-AND-CYLINDER ASSEMBLY (30) ONE ELEMENT (30A) OF WHICH IS CONNECTED TO SAID PEEL AND THE OTHER OF WHICH IS CONNECTED TO SAID CARRIAGE AND COMPRISING VALVE MEANS (33,36,37) OPERABLE IN A FIRST STATE IN WHICH FLUID SUPPLIED TO BOTH ENDS OF THE CYLINDER FOR EQUAL AND OPPOSITE DRIVE FORCES ON THE PISTON WHEREBY SAID PISTON EFFECTIVELY FLOATS WITHIN SAID CYLINDER TO PERMIT, DURING A SQUEEZE, RELATIVE MOVEMENT OF SAID PEEL AND SAID CARRIAGE FROM A DATUM POSITION, AND OPERABLE IN A SECOND STATE IN WHICH FLUID IS SUPPLIED TO ONE END OF THE CLINDER AND IS EXHAUSTED FROM THE OTHER END THEREOF TO RETURN, BETWEEN SQUEEZES, SAID PEEL AND SAID CARRIAGE TO SAID DATUM POSITION.
Claim 2
Dependent Claim
166 words
A WORKPIECE MANIPULATOR FOR A FORGING PRESS, COMPRISING A CARRIAGE(9,10), CARRIAGE DRIVE MEANS (22-23) FOR CONTINUOUSLY DRIVING SAID CARRIAGE DURING A FORGING PASS, A PEEL (12) MOUNTED ON SAID CARRIAGE, AND PEEL DRIVE MEANS (30-39) FOR DRIVING SAID PEEL LONGITUDINALLY RELATIVE TO SAID CARRIAGE, SAID PEEL DRIVE MEANS COMPRISING A DOUBLE-ACTING PISTON-AND-CYLINDER ASSEMBLY (30) ONE ELEMENT (30A) OF WHICH IS CONNECTED TO SAID PEEL AND THE OTHER OF WHICH IS CONNECTED TO SAID CARRIAGE AND COMPRISING VALVE MEANS (33,36,37) OPERABLE IN A FIRST STATE IN WHICH FLUID SUPPLIED TO BOTH ENDS OF THE CYLINDER FOR EQUAL AND OPPOSITE DRIVE FORCES ON THE PISTON WHEREBY SAID PISTON EFFECTIVELY FLOATS WITHIN SAID CYLINDER TO PERMIT, DURING A SQUEEZE, RELATIVE MOVEMENT OF SAID PEEL AND SAID CARRIAGE FROM A DATUM POSITION, AND OPERABLE IN A SECOND STATE IN WHICH FLUID IS SUPPLIED TO ONE END OF THE CLINDER AND IS EXHAUSTED FROM THE OTHER END THEREOF TO RETURN, BETWEEN SQUEEZES, SAID PEEL AND SAID CARRIAGE TO SAID DATUM POSITION.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |