US3777887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating dry granular material
Assignee: Individual
•
Filing: 1971-05-27
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Granted: 1973-12-11
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Expires: 1991-05-27
Abstract
Abstract Separator apparatus embodying an inclined porous deck having parallel transverse upper grooves at right angles to its direction of inclination. Granular material deposited onto the upper end of the inclined deck is assisted by low pressure air forced upwardly through the deck in moving toward the lower end of the deck, the air effecting separation between granules or particles of greater specific gravity and granules or particles of lighter specific gravity, the former dropping to the bottom of the grooves while the latter float upwardly and flow progressively from groove to groove toward the lower end of the porous deck. The downstream sides of the grooves make an acute angle with the upper face of the inclined porous deck to entrain greater specific gravity particles in the grooves.
Inventors
- 👤 N Johnston
- 👤 M Latker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
B; B03; B03B; B03B4/00; B03B4/06; B03B4/065; B03B4/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
In apparatus for separating intermixed materials of different specific gravities: a supporting structure; a plenum; a perforate pipe passing through said plenum; means mounting said pipe on said supporting structure; a porous deck mounted in said plenum and having spaced parallel grooves in its upper surface extending from the rearward portion of said deck to the forward portion of said deck; means for depositing the materials on the rearward portion of said deck; and means for conducting a gaseous medium into said pipe for discharge into said plenum and upward passage through said deck to effect fluidizing of the materials and their progression across said grooves from the rearward portion of said deck to the forward portion of said deck; said mounting means pivotally carrying said pipe on said supporting structure to enable said pipe, plenum and deck to be tilted between a normal position in which said grooves face upwardly and a tilted position in which the material of said grooves can be dumped from said deck.
Claim 2
Dependent Claim
168 words
In apparatus for separating intermixed materials of different specific gravities: a supporting structure; a plenum; a perforate pipe passing through said plenum; means mounting said pipe on said supporting structure; a porous deck mounted in said plenum and having spaced parallel grooves in its upper surface extending from the rearward portion of said deck to the forward portion of said deck; means for depositing the materials on the rearward portion of said deck; and means for conducting a gaseous medium into said pipe for discharge into said plenum and upward passage through said deck to effect fluidizing of the materials and their progression across said grooves from the rearward portion of said deck to the forward portion of said deck; said mounting means pivotally carrying said pipe on said supporting structure to enable said pipe, plenum and deck to be tilted between a normal position in which said grooves face upwardly and a tilted position in which the material of said grooves can be dumped from said deck.
Claim 3
Dependent Claim
24 words
In apparatus as defined in claim 1; said deck, pipe and plenum being held in a stationary position while the materials are being fluidized.
Claim 4
Dependent Claim
202 words
In apparatus for separating intermixed materials of different specific gravities: a supporting structure; a plenum; a perforate pipe passing through said plenum; means mounting said pipe on said suporring structure; a porous deck mounted in said plenum and having spaced parallel grooves in its upper surface extending from the rearward portion of said deck to the forward portion of said deck; means for depositing the materials on the rearward portion of said deck; and means for conducting a gaseous medium into said pipe for discharge into said plenum and upward passage through said deck to effect fluidizing of the materials and their progression across said grooves from the rearward portion of said deck to the forward portion of said deck; said mounting means normally supporting said pipe, plenum and deck in a stationary position inclined to the horizontal downwardly from the rear portion of said deck to the forward portion of said deck; said mounting means pivotally carrying said pipe on said supporting structure to enable said pipe, plenum and deck to be tilted between its normal stationary position in which said grooves face upwardly and a tilted position in which the material in said grooves can be dumped from said deck.
Claim 5
Dependent Claim
202 words
In apparatus for separating intermixed materials of different specific gravities: a supporting structure; a plenum; a perforate pipe passing through said plenum; means mounting said pipe on said suporring structure; a porous deck mounted in said plenum and having spaced parallel grooves in its upper surface extending from the rearward portion of said deck to the forward portion of said deck; means for depositing the materials on the rearward portion of said deck; and means for conducting a gaseous medium into said pipe for discharge into said plenum and upward passage through said deck to effect fluidizing of the materials and their progression across said grooves from the rearward portion of said deck to the forward portion of said deck; said mounting means normally supporting said pipe, plenum and deck in a stationary position inclined to the horizontal downwardly from the rear portion of said deck to the forward portion of said deck; said mounting means pivotally carrying said pipe on said supporting structure to enable said pipe, plenum and deck to be tilted between its normal stationary position in which said grooves face upwardly and a tilted position in which the material in said grooves can be dumped from said deck.
Claim 6
Dependent Claim
25 words
In apparatus as defined in claim 3; said parallel grooves having downstream sides disposed at an acute angle to the upper face of said deck.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |