US3992248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous feeding system for treatment towers
Assignee: STADLER HURTER Ltd
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Filing: 1971-12-27
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Granted: 1976-11-16
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Expires: 1991-12-27
Abstract
Abstract An improvement in continuously feeding slurry material to vertical upflow treatment towers. The improvement comprises providing a plurality of spaced apart inlet or outlet openings in the bottom inlet end of the tower and opening and closing the openings in timed sequence to allow the material to selectively flow into the tower from different spaced locations but continuously at a substantially constant rate.
Inventors
- 👤 Alfred Max Hurter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:25
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/008; D; D21; D21C; D21C9/00; D21C9/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A tower for treating material flowing vertically therethrough, said tower having a lower material inlet end and an upper material outlet end, feeding means for feeding material continuously into the tower at the lower material inlet end from a material supply source at a constant rate, said feeding means comprising a supply conduit connected to said material supply source, a plurality of spaced apart material passageways, one end of each passageway connected to the supply conduit, the other end of each passageway opening into the bottom of the tower at a location spaced from the other ends of the passageways, means for supplying material from the supply source through the supply conduit and to the passageways under pressure, a single valve associated with each passageway movable to control the flow of material through each passageway, and control means for moving said valves to substantially open each of said passageways in timed sequence while substantially closing the other passageways to allow material to flow selectively into the bottom of the tower from different locations to minimize channeling while maintaining continuous feed into the tower at a substantially constant rate.
Claim 2
Dependent Claim
188 words
A tower for treating material flowing vertically therethrough, said tower having a lower material inlet end and an upper material outlet end, feeding means for feeding material continuously into the tower at the lower material inlet end from a material supply source at a constant rate, said feeding means comprising a supply conduit connected to said material supply source, a plurality of spaced apart material passageways, one end of each passageway connected to the supply conduit, the other end of each passageway opening into the bottom of the tower at a location spaced from the other ends of the passageways, means for supplying material from the supply source through the supply conduit and to the passageways under pressure, a single valve associated with each passageway movable to control the flow of material through each passageway, and control means for moving said valves to substantially open each of said passageways in timed sequence while substantially closing the other passageways to allow material to flow selectively into the bottom of the tower from different locations to minimize channeling while maintaining continuous feed into the tower at a substantially constant rate.
Claim 3
Dependent Claim
41 words
A tower as claimed in claim 1, wherein the control means for moving each valve comprises a motor, a timer and actuator mechanism connecting the timer to each of the valve motors for opening and closing the valves in timed sequence.
Claim 4
Dependent Claim
48 words
A tower as claimed in claim 1, wherein each passageway is connected to the tower with an annular conical seat and each valve includes a conical surface cooperating with the seat and movable from an opened position spaced from the seat to a closed position abutting the seat.
Claim 5
Independent Claim
102 words
A method of improving the continuous feeding of material into a treatment tower having a bottom inlet end and a top outlet end, with the bottom inlet end having a plurality of spaced-apart passageways connecting a single material supply line to the tower, comprising feeding material through the supply line to all of the passageways under pressure and substantially opening each of said passageways in timed sequence while substantially closing the other passageways in a manner to allow material to flow selectively into the tower from different locations to minimize channeling while maintaining continuous feed into the tower at a constant rate.
Claim 6
Independent Claim
102 words
A method of improving the continuous feeding of material into a treatment tower having a bottom inlet end and a top outlet end, with the bottom inlet end having a plurality of spaced-apart passageways connecting a single material supply line to the tower, comprising feeding material through the supply line to all of the passageways under pressure and substantially opening each of said passageways in timed sequence while substantially closing the other passageways in a manner to allow material to flow selectively into the tower from different locations to minimize channeling while maintaining continuous feed into the tower at a constant rate.
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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |