Patent US3072243A successfully refreshed from Google Patents.
US3072243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw conveyor coupling
Assignee: Link Belt Co
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Filing: 1959-06-09
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Granted: 1963-01-08
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Expires: 1979-06-09
Abstract
No abstract record available.
Inventors
- 👤 David A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/24; B65G33/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A SCREW CONVEYOR COMPRISING, TWO ADJACENT SCREW SECTIONS EACH HAVING A HOLLOW CENTRAL SHAFT, A BEARING BETWEEN THE ADJACENT ENDS OF EACH OF SAID TWO SHAFTS, A COUPLING SHAFT POSITIONED WITHIN AND EXTENDING BETWEEN THE HOLLOW END PORTIONS OF SAID ADJACENT SHAFTS AND PASSING THROUGH SAID BEARING, AND REMOVABLE MEANS FOR SECURING EACH HOLLOW SHAFT END PORTION TO SAID COUPLING SHAFT AGAINST ROTATION AND RELATIVE AXIAL MOVEMENT, ONE OF SAID HOLLOW SHAFT END PORTIONS HAVING AN OPEN-ENDED LONGITUDINAL SLOT FORMED THEREIN, AND SAID COUPLING SHAFT HAVING SECURED TO ONE OF ITS END SURFACES A LUG WHICH EXTENDS RADIALLY THROUGH SAID SLOT AND BEYOND THE OUTER SURFACE OF SAID SHAFT END PORTION FOR MOVING SAID COUPLING SHAFT LONGITUDINALLY BEYOND THE SLOTTED END PORTION OF SAID ONE SHAFT WHEN SAID SECURING MEANS ARE REMOVED.
Claim 2
Dependent Claim
132 words
A SCREW CONVEYOR COMPRISING, TWO ADJACENT SCREW SECTIONS EACH HAVING A HOLLOW CENTRAL SHAFT, A BEARING BETWEEN THE ADJACENT ENDS OF EACH OF SAID TWO SHAFTS, A COUPLING SHAFT POSITIONED WITHIN AND EXTENDING BETWEEN THE HOLLOW END PORTIONS OF SAID ADJACENT SHAFTS AND PASSING THROUGH SAID BEARING, AND REMOVABLE MEANS FOR SECURING EACH HOLLOW SHAFT END PORTION TO SAID COUPLING SHAFT AGAINST ROTATION AND RELATIVE AXIAL MOVEMENT, ONE OF SAID HOLLOW SHAFT END PORTIONS HAVING AN OPEN-ENDED LONGITUDINAL SLOT FORMED THEREIN, AND SAID COUPLING SHAFT HAVING SECURED TO ONE OF ITS END SURFACES A LUG WHICH EXTENDS RADIALLY THROUGH SAID SLOT AND BEYOND THE OUTER SURFACE OF SAID SHAFT END PORTION FOR MOVING SAID COUPLING SHAFT LONGITUDINALLY BEYOND THE SLOTTED END PORTION OF SAID ONE SHAFT WHEN SAID SECURING MEANS ARE REMOVED.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |