US3333679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for closing the outlet end of a worm conveyer
Assignee: ADOLF ZIMMERMANN MASCHINENFABA
•
Filing: 1965-07-07
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Granted: 1967-08-01
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Expires: 1985-07-07
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Adolf
- 👤 Lesk Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:36
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A SEALING SCREW CONVEYER, COMPRISING: A GENERALLY TUBULAR CONVEYER PIPE MEANS FOR RECEIVING BULK MATERIAL AND HAVING OPPOSITE INLET AND OUTLET ENDS CONNECTED TO AREAS OF MATERIALLY DIFFERENT PRESSURES; CONVEYER SCREW MEANS OPERATIVELY ROTATIONALLY MOUNTED WITHIN SAID PIPE MEANS FOR AXIALLY CONVEYING BULK MATERIAL TOWARD ONLY THE OUTLET END OF SAID PIPE UPON ROTATION IN ONE DIRECTION; A GENERALLY RADIALLY EXTENDING ANNULAR SEALING SURFACE ON SAID PIPE MEANS AROUND THE PERIPHERY OF SAID OUTLET END; AND HIGHLY ELASTIC FLEXIBLE VALVE PLATE MEANS COMPLETELY COVERING SAID OUTLET END OF SAID PIPE AND HAVING A GENERALLY RADIALLY EXTENDING ANNULAR SEALING SURFACE BIASED IN FACE TO FACE SEALING CONTACT WITH SAID PIPE MEANS SEALING SURFACE, AND FOR FORMING A NORMALLY CLOSED PREDETERMINED PRESSURE OPENING VALVE AND FOR GUIDING THE DISCHARGE OF BULK MATERIAL GENERALLY RADIALLY BETWEEN SAID SEALING SURFACES WHEN OPEN.
Claim 2
Dependent Claim
138 words
A SEALING SCREW CONVEYER, COMPRISING: A GENERALLY TUBULAR CONVEYER PIPE MEANS FOR RECEIVING BULK MATERIAL AND HAVING OPPOSITE INLET AND OUTLET ENDS CONNECTED TO AREAS OF MATERIALLY DIFFERENT PRESSURES; CONVEYER SCREW MEANS OPERATIVELY ROTATIONALLY MOUNTED WITHIN SAID PIPE MEANS FOR AXIALLY CONVEYING BULK MATERIAL TOWARD ONLY THE OUTLET END OF SAID PIPE UPON ROTATION IN ONE DIRECTION; A GENERALLY RADIALLY EXTENDING ANNULAR SEALING SURFACE ON SAID PIPE MEANS AROUND THE PERIPHERY OF SAID OUTLET END; AND HIGHLY ELASTIC FLEXIBLE VALVE PLATE MEANS COMPLETELY COVERING SAID OUTLET END OF SAID PIPE AND HAVING A GENERALLY RADIALLY EXTENDING ANNULAR SEALING SURFACE BIASED IN FACE TO FACE SEALING CONTACT WITH SAID PIPE MEANS SEALING SURFACE, AND FOR FORMING A NORMALLY CLOSED PREDETERMINED PRESSURE OPENING VALVE AND FOR GUIDING THE DISCHARGE OF BULK MATERIAL GENERALLY RADIALLY BETWEEN SAID SEALING SURFACES WHEN OPEN.
References Cited (Backward Citations)
US2699272A
Cited
US3059759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |