US3815737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity ore classifier
Assignee: Individual
•
Filing: 1972-11-06
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Granted: 1974-06-11
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Expires: 1992-11-06
Abstract
Abstract A classifier having an outer tubular casing and a scrubber barrel with the casing. The scrubber barrel has an imperforate portion at the inlet end thereof and a perforated portion at the outlet end. The scrubber barrel is of less diameter than the outer casing to provide a space therebetween. The inner surface of the casing has a screw conveyor arranged to urge material toward the inlet end and the outer surface of the scrubber barrel has a screw conveyor arranged to urge material toward the outlet end. The arrangement is such that fines discharged into the area between the outer casing and the scrubber barrel are concentrated and urged back toward the inlet end by the screw conveyor on the casing, the upper or lighter portion of the fines being shaved off and moved toward the outlet end by the conveyor on the scrubber barrel. Means are provided to laterally shake the assembly.
Inventors
- 👤 G Katter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:32
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/48; B03B5/56
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
208 words
A gravity ore classifier comprising a. a tubular imperforate casing, b. means for rotating said casing, c. a scrubber barrel mounted integrally within said casing having an outer diameter of less dimension than the inner diameter of said casing to provide a space therebetween, d. inlet means in said scrubber barrel for admitting aggregate thereto, e. said scrubber barrel having a perforated extension portion allowing fines to fall by gravity into the space between said casing and the scrubber barrel, f. means defining an outlet in the end of said extension which is opposite from the feed end, g. a first conveyor screw on the inner surface of said casing arranged to direct fines which fall into the space between the casing and the scrubber barrel toward the feed end, h. a second conveyor screw on the outer surface of said scrubber barrel arranged to direct the said fines away from the inlet end whereby as the fines move with said first conveyor toward the inlet end the concentrates thereof compact in the first conveyor for movement therewith and the lighter fines are shaved off by the opposite inter-action between the two conveyors, i. and outlet means in said casing for discharging the concentrates from said first conveyor.
Claim 2
Dependent Claim
208 words
A gravity ore classifier comprising a. a tubular imperforate casing, b. means for rotating said casing, c. a scrubber barrel mounted integrally within said casing having an outer diameter of less dimension than the inner diameter of said casing to provide a space therebetween, d. inlet means in said scrubber barrel for admitting aggregate thereto, e. said scrubber barrel having a perforated extension portion allowing fines to fall by gravity into the space between said casing and the scrubber barrel, f. means defining an outlet in the end of said extension which is opposite from the feed end, g. a first conveyor screw on the inner surface of said casing arranged to direct fines which fall into the space between the casing and the scrubber barrel toward the feed end, h. a second conveyor screw on the outer surface of said scrubber barrel arranged to direct the said fines away from the inlet end whereby as the fines move with said first conveyor toward the inlet end the concentrates thereof compact in the first conveyor for movement therewith and the lighter fines are shaved off by the opposite inter-action between the two conveyors, i. and outlet means in said casing for discharging the concentrates from said first conveyor.
Claim 3
Dependent Claim
62 words
The gravity ore classifier of clAim 1 wherein a. said inlet means in said scrubber barrel is at one end thereof, b. said scrubber barrel including an imperforate portion adjacent to the inlet end thereof, c. said perforate portion being disposed adjacent to the other end, d. and outlet means in said scrubber barrel at the end opposite from said inlet means.
Claim 4
Dependent Claim
46 words
The gravity ore classifier of claim 1 wherein a. said inlet means in said scrubber barrel is at one end thereof, b. said scrubber barrel including an imperforate portion adjacent to the inlet end thereof, c. said perforate portion being disposed adjacent to the other end.
Claim 5
Dependent Claim
20 words
The gravity ore classifier of claim 3 wherein said casing is tilted down from the inlet to the outlet end.
Claim 6
Dependent Claim
36 words
The gravity ore classifier of claim 3 wherein the perforate portion of said scrubber barrel is smaller in diameter than its imperforate portion to provide an enlarged separating space between such imperforate portion and the casing.
Claim 7
Dependent Claim
26 words
The gravity ore classifier of claim 5 including an outlet in said casing communicating with said enlarged separating space to discharge lighter ones of the fines.
Claim 8
Dependent Claim
18 words
The gravity ore classifier of claim 1 including shaker means engageable with said casing to shake the latter.
Claim 9
Dependent Claim
19 words
The gravity ore classifier of claim 1 including shaker means engageable with said casing to shake the latter laterally.
Claim 10
Dependent Claim
20 words
The gravity ore classifier of claim 1 including means for introducing water to one of said inlet and outlet ends.
Claim 11
Dependent Claim
34 words
The gravity ore classifier of claim 1 including means for introducing water to said inlet means of the scrubber barrel and to the upper outer portion of said scrubber barrel adjacent said inlet means.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |