US3568832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical ore concentrator
Assignee: Trelleborgs Gummifabriks AB
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Filing: 1969-02-03
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Granted: 1971-03-09
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Expires: 1989-02-03
Abstract
Abstract An apparatus for concentrating ore and the like material having two chutes joined by a ridge-shaped portion and running in adjacent parallel relation and helically about a substantially vertical axis. The outer chute carries a mixture of a liquid and the material to be concentrated, and the inner chute carries the liquid by means of which the concentration is effected, the liquid being transferred from the inner chute to the outer chute by the centrifugal force. A groove is arranged in the ridgeshaped portion. A band which may have through holes is inserted in the groove and its projection from the groove is adjustable. The band serves as an adjustable overflow to enable precise control of the transfer of the liquid from the inner chute to the outer chute at successive portions along the length of the chutes.
Inventors
- 👤 Bo K G Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:13
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/626
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
An apparatus for concentrating and separately collecting from a comminuted mass composed of particles having different specific gravities those particles having like specific gravity, comprising two chutes (10, 12) running in adjacent parallel relation and helically about a substantially vertical axis, a ridge-shaped portion (13) extending between and interconnecting said chutes, said outer chute (10) being adapted to carry a stream of liquid having therein the material to be concentrated and said inner chute (12) being adapted to carry a stream of liquid by means of which concentration is to be effected and which flows downwardly in said inner chute and by the centrifugal force is successively transferred to said outer chute, means defining a groove (18) in said ridge-shaped portion (13) between the adjacent parallel chutes (10, 12), said groove-defining means extending along said ridge-shaped portion, band means (19) inserted for vertical adjustment in the groove (18) in said groove-defining means, said band means having at least one part which partially projects from the groove in said groove-defining means, and drawoff outlets (14) in the bottom of said outer chute (10) said drawoff outlets being arranged periodically along the length of said outer chute and adjacent the inner edge thereof.
Claim 2
Independent Claim
201 words
An apparatus for concentrating and separately collecting from a comminuted mass composed of particles having different specific gravities those particles having like specific gravity, comprising two chutes (10, 12) running in adjacent parallel relation and helically about a substantially vertical axis, a ridge-shaped portion (13) extending between and interconnecting said chutes, said outer chute (10) being adapted to carry a stream of liquid having therein the material to be concentrated and said inner chute (12) being adapted to carry a stream of liquid by means of which concentration is to be effected and which flows downwardly in said inner chute and by the centrifugal force is successively transferred to said outer chute, means defining a groove (18) in said ridge-shaped portion (13) between the adjacent parallel chutes (10, 12), said groove-defining means extending along said ridge-shaped portion, band means (19) inserted for vertical adjustment in the groove (18) in said groove-defining means, said band means having at least one part which partially projects from the groove in said groove-defining means, and drawoff outlets (14) in the bottom of said outer chute (10) said drawoff outlets being arranged periodically along the length of said outer chute and adjacent the inner edge thereof.
Claim 3
Dependent Claim
26 words
An apparatus as claimed in claim 1, wherein said groove-defining means and said band means (19) are inclined inwardly in relation to said inner chute (12).
Claim 4
Dependent Claim
26 words
An apparatus as claimed in claim 1, wherein said groove-defining means and said band means (19) are inclined outwardly in relation to said inner chute (12).
Claim 5
Dependent Claim
23 words
An apparatus as claimed in claim 1, wherein said groove-defining means forms a smooth surface at the top of said ridge-shaped portion (13).
Claim 6
Dependent Claim
21 words
An apparatus as claimed in claim 1, wherein said band means (19) has means defining at least one through hole (20).
Claim 7
Dependent Claim
19 words
An apparatus as claimed in claim 5, wherein said hole-defining means defines at least one longitudinal slot-shaped hole (20).
Claim 8
Dependent Claim
63 words
An apparatus as claimed in claim 5, wherein the depth of the groove (18) in said groove-defining means is such in relation to the position of said at least one hole (20) in said hole-defining means that said at least one hole is located entirely within the groove (18) when said band means is located as deeply down as possible in the groove.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |