US3933394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pneumatically withdrawing fine material from a silo container
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1974-10-04
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Granted: 1976-01-20
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Expires: 1994-10-04
Abstract
Abstract Apparatus for withdrawing fine material from a silo having a base sloped toward a discharge zone comprises a chamber within which an air feed nozzle registers with the lower end of a conveyor conduit which extends upwardly out of the silo. Fine material is admitted to the chamber via apertures and is entrained in air passing from the nozzle into the conduit.
Inventors
- 👤 Hans Klein
- 👤 Gerhard Balzau
- 👤 Jacquy-Pierre Laffargue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:38
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/16; B65G53/18; B65G53/22; B65G53/06; B65G53/10; B65G53/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
Apparatus for pneumatically withdrawing fine material from a silo container having a peripheral wall and a base, said base being inclined toward a discharge zone, said apparatus comprising a housing within said container forming a relief chamber at said zone, said housing having apertures adjacent the base of said container to provide an entry for fine material into said chamber; an airfeed nozzle extending into said chamber from below; and a conveyor conduit extending into said chamber from above and having a receiving end in register with and spaced above said nozzle.
Claim 2
Dependent Claim
92 words
Apparatus for pneumatically withdrawing fine material from a silo container having a peripheral wall and a base, said base being inclined toward a discharge zone, said apparatus comprising a housing within said container forming a relief chamber at said zone, said housing having apertures adjacent the base of said container to provide an entry for fine material into said chamber; an airfeed nozzle extending into said chamber from below; and a conveyor conduit extending into said chamber from above and having a receiving end in register with and spaced above said nozzle.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 wherein said conduit and said chamber are substantially coaxial.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 2 wherein said chamber has a substantially uniform cross-sectional area over its height.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 1 wherein said housing has a height to cross-sectional area ratio between 2.5-5:1.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 1 wherein said housing is immediately adjacent the wall of said container.
Claim 7
Dependent Claim
14 words
Apparatus according to claim 1 including means for adjusting the size of said apertures.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 1 including means for adjusting the flow of air through said nozzle.
Claim 9
Dependent Claim
10 words
Apparatus according to claim 1 wherein said base is aeratable.
Claim 10
Dependent Claim
14 words
Apparatus according to claim 1 wherein said chamber has a bottom which is aeratable.
Claim 11
Dependent Claim
21 words
Apparatus according to claim 1 including conveyor means outward of said container, and wherein said conduit communicates with said conveyor means.
Claim 12
Dependent Claim
36 words
Apparatus according to claim 1 wherein said housing is cylindrical, coaxial with and spaced from said conveyor conduit, the spacing between said conveyor conduit and said housing corresponding substantially to the diameter of said conveyor conduit.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |