US3722747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silo discharge control
Assignee: HASLER FRERES A CORP OF FRANCE
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Filing: 1971-11-19
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Granted: 1973-03-27
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Expires: 1991-11-19
Abstract
Abstract This specification discloses a silo suitable for granulated or powder form materials. The silo of the invention comprises a fixed shaft, at least one transfer assembly situated below said shaft and an extractor disposed beneath said transfer assembly. The silo shaft has a convergent hopper in its lower portion and there is an outlet opening in the hopper which provides for free flow of material. At least one decompression hopper is situated in the transfer assembly and is elastically suspended so as to be displaceable in all directions relative to the silo shaft and the extractor. In this way, products leaving the silo form a constantly renewed slope at the rear end of the active part of said extractor.
Inventors
- 👤 G Petit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/26; B65D88/28; B65D88/54; B65D88/64; B65D88/66; B65D2588/00; B65D2588/54; B65D2588/64; B65D2588/645
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A silo for materials in granulated or powdered form, comprising a fixed silo body provided in its lower part with converging walls terminating in an outlet opening, a hopper disposed beneath said outlet opening, a conveyor disposed beneath said hopper, said hopper being so arranged with respect to said conveyor that material leaving the hopper normally forms a constantly renewed rearwardly directed slope on said conveyor with respect to the direction of movement of the material thereby, the slope being representative of the material flow condition through said outlet opening, declogging means, and sensing means responsive to said slope for controlling said declogging means to prevent an eventual clogging of the material within said silo body.
Claim 2
Dependent Claim
116 words
A silo for materials in granulated or powdered form, comprising a fixed silo body provided in its lower part with converging walls terminating in an outlet opening, a hopper disposed beneath said outlet opening, a conveyor disposed beneath said hopper, said hopper being so arranged with respect to said conveyor that material leaving the hopper normally forms a constantly renewed rearwardly directed slope on said conveyor with respect to the direction of movement of the material thereby, the slope being representative of the material flow condition through said outlet opening, declogging means, and sensing means responsive to said slope for controlling said declogging means to prevent an eventual clogging of the material within said silo body.
Claim 3
Dependent Claim
39 words
A silo according to claim 1, wherein said sensing means include a pivotally supported feeler blade adapted to engage said slope so that the angular position of said blade depends on the material flow condition through said outlet opening.
Claim 4
Dependent Claim
34 words
A silo according to claim 1, wherein said declogging means include means resiliently mounting said hopper with respect to said silo body, and means for vibrating said hopper when actuated by said sensing means.
Claim 5
Dependent Claim
52 words
A silo according to claim 1, wherein said declogging means include at least one intermediate hopper resiliently mounted with respect to said silo body between the outlet opening thereof and the first mentioned hopper and means for vibrating said intermediate hopper independently of said first hopper when actuated by said sensing means.
Claim 6
Dependent Claim
31 words
A silo according to claim 1, wherein said declogging means include a decompression platform resiliently mounted in said hopper and means for vibrating said platform when actuated by said sensing means.
Claim 7
Dependent Claim
30 words
A silo according to claim 1, including at least one movable closure member for varying the effective area of a control section through which material passes after leaving said hopper.
Claim 8
Dependent Claim
46 words
A silo according to claim 6, wherein the pressure of the material on the conveyor is representative of the material flow conDition through said outlet opening, and including sensing means responsive to said pressure on the conveyor portion beneath said hopper for controlling said closure member.
Claim 9
Dependent Claim
15 words
A silo according to claim 6, wherein said closure member includes a horizontally displaceable register.
Claim 10
Dependent Claim
100 words
A silo according to claim 1, characterized in that said silo body includes a plurality of outlet openings, a hopper beneath each of said openings, each hopper being spaced above said conveyor by a distance greater than the distance between said conveyor and the hopper immediately preceding it with respect to the direction of movement of material by said conveyor, declogging means for each hopper, sensing means responsive to the slope corresponding to the respective hopper, for controlling its respective declogging means, and an adjustable sill for controlling the height of the material moving along the conveyor from each hopper.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |