US3351390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for transferring bulk material between zones at different respective pressures
Assignee: Buehler AG
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Filing: 1965-03-24
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Granted: 1967-11-07
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Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 Dellsperger Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:52
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4691; A; A23; A23L; A23L19/00; A23L19/10; A23L19/12; A23L19/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
APPARATUS FOR THE TRANSFER OF BULK MATERIAL BETWEEN ZONES AT DIFFERENT RESPECTIVE FLUID PRESSURES, SAID APPARATUS COMPRISING, IN COMBINATION, A MATERIAL FEED DEVICE; A DRUM OPERATIVELY ASSOCIATED WITH SAID DEVICE; MEANS SUBDIVIDING SAID DRUM INTO INDIVIDUAL SLUICE CHAMBERS EACH HAVING RESPECTIVE FILLING AND DISCHARGE APERTURES; A PLURALITY OF CLOSURES, EACH ASSOCIATED WITH A RESPECTIVE ONE OF SAID APERTURES; MEANS EFFECTING RELATIVE ROTATION OF SAID DRUM AND SAID FEED DEVICE; SAID DRUM EXTENDING AXIALLY BEYOND SAID SLUICE CHAMBERS INTO THE REGION OF SAID FEED DEVICE TO DEFINE A FEED ZONE; MEANS MOUNTING SAID CLOSURES FOR MOVEMENT BODILY TOWARD AND AWAY FROM THE CHAMBER SURFACE HAVING THE RESPECTIVE ASSOCIATED APERTURE THEREIN; AND A PLURALITY OF OPERATING MEANS, EACH INDIVID-
Claim 2
Dependent Claim
117 words
APPARATUS FOR THE TRANSFER OF BULK MATERIAL BETWEEN ZONES AT DIFFERENT RESPECTIVE FLUID PRESSURES, SAID APPARATUS COMPRISING, IN COMBINATION, A MATERIAL FEED DEVICE; A DRUM OPERATIVELY ASSOCIATED WITH SAID DEVICE; MEANS SUBDIVIDING SAID DRUM INTO INDIVIDUAL SLUICE CHAMBERS EACH HAVING RESPECTIVE FILLING AND DISCHARGE APERTURES; A PLURALITY OF CLOSURES, EACH ASSOCIATED WITH A RESPECTIVE ONE OF SAID APERTURES; MEANS EFFECTING RELATIVE ROTATION OF SAID DRUM AND SAID FEED DEVICE; SAID DRUM EXTENDING AXIALLY BEYOND SAID SLUICE CHAMBERS INTO THE REGION OF SAID FEED DEVICE TO DEFINE A FEED ZONE; MEANS MOUNTING SAID CLOSURES FOR MOVEMENT BODILY TOWARD AND AWAY FROM THE CHAMBER SURFACE HAVING THE RESPECTIVE ASSOCIATED APERTURE THEREIN; AND A PLURALITY OF OPERATING MEANS, EACH INDIVID-
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |