Patent US3623657A successfully refreshed from Google Patents.
US3623657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge apparatus
Assignee: Pennwalt Corp
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Filing: 1970-08-06
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Granted: 1971-11-30
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Expires: 1990-08-06
Abstract
Abstract A heavy-phase material and a light-phase material separate into two concentric layers, the heavy-phase material accumulating adjacent to the peripheral wall of the bowl. A control device regulates the position of the interface or line of separation between the layers, the control device including a conduit extending inwardly from an opening in the bowl wall to the desired position, and a detecting device. The conduit conducts a sample of the material to the detecting device for sensing a change in specific gravity at that position. Depending upon the direction of change, the detecting device either temporarily closes a feed valve controlling the introduction of feed mixture into the bowl, or actuates a recycle pump for recycling extracted heavy-phase material back into the bowl.
Inventors
- 👤 Charles Edward Trump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:29
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/04; B04B11/043
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
202 words
A centrifuge including a rotatably mounted centrifuge bowl having a separation chamber therein, said bowl having an annular liquid overflow lip formed about the rotational axis at the upper end of said bowl, means including valve means, for feeding a mixture of at least two materials into said separation chamber wherein the first material thereof has a higher specific gravity than the second material thereof, and whereby said first material builds up against the peripheral wall of said bowl, means for continuously discharging said first material, means for receiving said first material upon discharge, means including pump means, operatively associated with said receiving means for recycling said first material into the outer region of said separation chamber, means for indicating when the line separation between said materials has reached a predetermined level inward of said peripheral wall and outward of said lip, said indicating means including detecting means operatively associated with said valve means and said pump means, said detecting means being adapted to detect an increase above the specific gravity of said second material for closing said valve means, and adapted to detect a decrease in specific gravity below the specific gravity of said first material for actuating said pump means.
Claim 2
Dependent Claim
202 words
A centrifuge including a rotatably mounted centrifuge bowl having a separation chamber therein, said bowl having an annular liquid overflow lip formed about the rotational axis at the upper end of said bowl, means including valve means, for feeding a mixture of at least two materials into said separation chamber wherein the first material thereof has a higher specific gravity than the second material thereof, and whereby said first material builds up against the peripheral wall of said bowl, means for continuously discharging said first material, means for receiving said first material upon discharge, means including pump means, operatively associated with said receiving means for recycling said first material into the outer region of said separation chamber, means for indicating when the line separation between said materials has reached a predetermined level inward of said peripheral wall and outward of said lip, said indicating means including detecting means operatively associated with said valve means and said pump means, said detecting means being adapted to detect an increase above the specific gravity of said second material for closing said valve means, and adapted to detect a decrease in specific gravity below the specific gravity of said first material for actuating said pump means.
Claim 3
Dependent Claim
41 words
A centrifuge according to claim 1 wherein said indicating means includes a tubular passageway extending through the peripheral wall of said bowl inwardly of the bowl to said predetermined level for conducting material out of said bowl to said detecting means.
Claim 4
Dependent Claim
47 words
A centrifuge according to claim 1 wherein said bowl further includes an annular ring dam formed about the rotational axis at the bottom end of said bowl, and a passageway extending between the inner edge of said ring dam and the outer region of said separation chamber.
Claim 5
Dependent Claim
22 words
A centrifuge according to claim 3 wherein said means for discharging said first material comprises a plurality of circumferentially spaced peripheral outlets.
Claim 6
Dependent Claim
32 words
A centrifuge according to claim 4 wherein said recycling means includes injection outlet means for recycling said first material over said ring dam, and into the outer region of said separation chamber.
Claim 7
Dependent Claim
25 words
A centrifuge according to claim 4 wherein the radius of the inner edge of said ring dam is larger than the radius of said lip.
Claim 8
Dependent Claim
28 words
A centrifuge according to claim 4 wherein the radius of the inner edge of said ring dam is equal to or less than the radius of said lip.
Claim 9
Dependent Claim
39 words
A centrifuge according to claim 5, and further including delay timer means operatively associated with said valve means and said detection means, said delay timer means being adapted to reopen said valve means after being closed a predetermined time.
Claim 10
Dependent Claim
42 words
A centrifuge according to claim 8 wherein said feed means includes outlet means disposed within said separation chamber, and further including annular wall structure formed about the rotational axis, said wall structure being disposed between said peripheral outlets and said outlet means.
Claim 11
Dependent Claim
200 words
A centrifuge including a rotatably mounted centrifuge bowl having a separation chamber therein, said bowl having an annular liquid overflow lip formed about the rotational axis at the upper end of said bowl, means including valve means, for feeding a mixture of at least two materials into said separation chamber wherein the first material thereof has a higher specific gravity than the second material thereof, and whereby said first material builds up against the peripheral wall of said bowl, said bowl having a plurality of circumferentially spaced peripheral outlets for continuously discharging said first material, means including pump means for injecting auxiliary material into the outer region of said separating chamber, means for indicating when the line of separation between said first and second materials has reached a predetermined level inward of said peripheral wall and outward of said lip, said indicating means including detecting means operatively associated with said valve means and said pump means, said detecting means being adapted to detect an increase above the specific gravity of said second material for closing said valve means, and adapted to detect a decrease in specific gravity below the specific gravity of said first material for actuating said pump means.
Claim 12
Dependent Claim
200 words
A centrifuge including a rotatably mounted centrifuge bowl having a separation chamber therein, said bowl having an annular liquid overflow lip formed about the rotational axis at the upper end of said bowl, means including valve means, for feeding a mixture of at least two materials into said separation chamber wherein the first material thereof has a higher specific gravity than the second material thereof, and whereby said first material builds up against the peripheral wall of said bowl, said bowl having a plurality of circumferentially spaced peripheral outlets for continuously discharging said first material, means including pump means for injecting auxiliary material into the outer region of said separating chamber, means for indicating when the line of separation between said first and second materials has reached a predetermined level inward of said peripheral wall and outward of said lip, said indicating means including detecting means operatively associated with said valve means and said pump means, said detecting means being adapted to detect an increase above the specific gravity of said second material for closing said valve means, and adapted to detect a decrease in specific gravity below the specific gravity of said first material for actuating said pump means.
Claim 13
Dependent Claim
100 words
A centrifuge according to claim 10 wherein said bowl further includes an annular ring dam formed about the rotational axis at the bottom end of said bowl, a passageway extending between the inner edge of said ring dam and the outer region of said separation chamber, said injection means having injection outlet means disposed adjacent to the inner edge of said ring dam for injecting said auxiliary material over said ring dam and into the outer region of said separAtion chamber, and wherein the radius of the inner edge of said ring dam is larger than that of said lip.
Claim 14
Dependent Claim
103 words
A centrifuge according to claim 10 wherein said bowl further includes an annular ring dam formed about the rotational axis at the bottom end of said bowl, a passageway extending between the inner edge of said ring dam and the outer region of said separation chamber, said injection means having injection outlet means disposed adjacent to the inner edge of said ring dam for injecting said auxiliary material over said ring dam and into the outer region of said separation chamber, and wherein the radius of the inner edge of said ring dam is equal to or less than that of said lip.
References Cited (Backward Citations)
US2905380A
Cited
US3047214A
Cited
DE1142137B
Cited
US3167509A
Cited
DE1144198B
Cited
US3420374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |