US3997441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure filter separator
Assignee: Amsouth Bank NA
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Filing: 1975-04-21
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Granted: 1976-12-14
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Expires: 1995-04-21
Abstract
Abstract Apparatus and method for providing continuous pressure filter separation are disclosed. The apparatus includes a chamber with a pair of perforated cylindrical sleeves having filter media and precoat material disposed therebetween. A rotatable wiper blade assembly mounted on a first hollow shaft is longitudinally disposed within the central portion of the chamber. Filtered solid materials are removed through one or more slots in the first hollow shaft which intermittently align with prealigned slots in a pair of concentric hollow shafts mounted within the first hollow shaft.
Inventors
- 👤 Lee F. Pamplin, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:58
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/25; B01D29/62; B01D29/64; B01D29/6469; B01D29/6476; B01D29/88; B01D29/92; B01D29/94; B01D2201/00; B01D2201/04; B01D2201/0407
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
269 words
A filter separator for continuously filtering a liquid-solid feed material, comprising: a cylindrical chamber having enclosing top, bottom and side walls; an inner and an outer perforated cylindrical sleeve, said sleeves being mounted coaxially within said chamber in a spaced relationship; a filter media attached to and extending around the entire inner surface of said outer sleeve, said filter media being of a thickness such that a space remains between the filter media and the inner sleeve; a volume of precoat material in said space between the filter media and the inner sleeve, said precoat material being collected on the inner side of the filter media and filling said space and the perforations in the inner sleeve; a first spirally-slotted hollow shaft rotatably mounted coaxially within said chamber, said first shaft having at least one spirally-slotted portion for passage of solid filtered material; a wiper blade assembly having at least on wiper blade mounted on said first shaft, said wiper blade extending in a spiral around said first shaft and being of a size and construction sufficient to constantly move collected solid material off of the interior surface of the inner perforated cylindrical sleeve; means for rotating said first spirally-slotted hollow shaft and wiper blade assembly; inlet means for feeding liquid-solid feed material under pressure into the central portion of said chamber interiorly of said cylindrical sleeves; means for removing solid filtered material from the interior of said first hollow shaft; and an outlet located on the periphery of said chamber for removal of liquid filtrate which collects between the outer sleeve and the side walls of the chamber.
Claim 2
Dependent Claim
269 words
A filter separator for continuously filtering a liquid-solid feed material, comprising: a cylindrical chamber having enclosing top, bottom and side walls; an inner and an outer perforated cylindrical sleeve, said sleeves being mounted coaxially within said chamber in a spaced relationship; a filter media attached to and extending around the entire inner surface of said outer sleeve, said filter media being of a thickness such that a space remains between the filter media and the inner sleeve; a volume of precoat material in said space between the filter media and the inner sleeve, said precoat material being collected on the inner side of the filter media and filling said space and the perforations in the inner sleeve; a first spirally-slotted hollow shaft rotatably mounted coaxially within said chamber, said first shaft having at least one spirally-slotted portion for passage of solid filtered material; a wiper blade assembly having at least on wiper blade mounted on said first shaft, said wiper blade extending in a spiral around said first shaft and being of a size and construction sufficient to constantly move collected solid material off of the interior surface of the inner perforated cylindrical sleeve; means for rotating said first spirally-slotted hollow shaft and wiper blade assembly; inlet means for feeding liquid-solid feed material under pressure into the central portion of said chamber interiorly of said cylindrical sleeves; means for removing solid filtered material from the interior of said first hollow shaft; and an outlet located on the periphery of said chamber for removal of liquid filtrate which collects between the outer sleeve and the side walls of the chamber.
Claim 3
Dependent Claim
96 words
The filter separator of claim 1, wherein said means for removing solid filtered material includes a pair of concentric hollow shafts coaxially mounted within said first hollow shaft, each shaft of said pair of shafts being provided with at least one vertical slot; means for adjusting the alignment of the vertical slots of said pair of shafts; at least one spiral-shaped slotted portion of said first hollow shaft being aligned with said blade, said spiral-shaped slotted portion being intermittently aligned with the vertical slots of said pair of shafts during rotation of said first hollow shaft.
Claim 4
Dependent Claim
271 words
In an apparatus for adjusting the flow of removal of solid filtered material from a cylindrical filter separator, the improvement comprising: a first hollow shaft rotatably mounted coaxially within said separator, said first shaft having at least one spiral shaped slotted portion for passage of solid filtered material into a valve unit constructed to control the flow of solid filtered material by the interaction of the valve unit with the slotted portion of the first hollow spirally-slotted shaft; said valve unit including a pair of concentric hollow shafts coaxially mounted within said first spirally-slotted hollow shaft, the inner shaft of said pair of concentric hollow shafts being stationary and the outer shaft of said pair of concentric hollow shafts being rotatably adjustable; each shaft of said pair of concentric hollow shafts being provided with at least one vertical slot, the spiral-shaped slotted portion of said first shaft being intermittently aligned, from the top to the bottom, with the vertical slots of said pair of concentric hollow shafts during rotation of said first spirally-slotted shaft; and means for adjusting the alignment of the outer shaft of said pair of shafts relative to the stationary inner shaft of said pair of shafts to create an adjustable escape port of varying sizes by alignment of the vertical slot in the outer adjustable shaft of the pair of shafts with the vertical slot in the stationary inner shaft of the pair of shafts to control the flow of solid filtered material into the interior of the stationary inner shaft, said inner shaft acting as the exit port of solid filtered material from the filter separator.
Claim 5
Dependent Claim
271 words
In an apparatus for adjusting the flow of removal of solid filtered material from a cylindrical filter separator, the improvement comprising: a first hollow shaft rotatably mounted coaxially within said separator, said first shaft having at least one spiral shaped slotted portion for passage of solid filtered material into a valve unit constructed to control the flow of solid filtered material by the interaction of the valve unit with the slotted portion of the first hollow spirally-slotted shaft; said valve unit including a pair of concentric hollow shafts coaxially mounted within said first spirally-slotted hollow shaft, the inner shaft of said pair of concentric hollow shafts being stationary and the outer shaft of said pair of concentric hollow shafts being rotatably adjustable; each shaft of said pair of concentric hollow shafts being provided with at least one vertical slot, the spiral-shaped slotted portion of said first shaft being intermittently aligned, from the top to the bottom, with the vertical slots of said pair of concentric hollow shafts during rotation of said first spirally-slotted shaft; and means for adjusting the alignment of the outer shaft of said pair of shafts relative to the stationary inner shaft of said pair of shafts to create an adjustable escape port of varying sizes by alignment of the vertical slot in the outer adjustable shaft of the pair of shafts with the vertical slot in the stationary inner shaft of the pair of shafts to control the flow of solid filtered material into the interior of the stationary inner shaft, said inner shaft acting as the exit port of solid filtered material from the filter separator.
Claim 6
Independent Claim
212 words
A method for continuously filtering a liquid-solid feed material, comprising: a. passing precoat material under pressure into a chamber having an inner and outer perforated cylindrical sleeve mounted therein in a spaced relationship and a filter media attached to the inner surface of said outer sleeve, said precoat material having a particle size large enough that the precoat is retained by the filter media; b. collecting said precoat material upon the filter media so that said precoat fills the space between the filter media and the inner surface of the inner sleeve; c. passing a liquid-solid feed material under pressure into the central portion of said chamber interiorly of said cylindrical sleeves; d. rotating a wiper blade assembly having at least one wiper blade attached to a first spirally-slotted hollow shaft rotatably mounted coaxially within said chamber, said wiper blade extending in a spiral around said first shaft and acting to constantly move collected solid material off of the interior surface of said inner sleeve, said first hollow shaft having at least one spirally-slotted portion for passage of solid material; e. removing the solid material which collects on the interior of said inner sleeve; and f. removing the liquid filtrate which collects between the outer sleeve and the walls of the chamber.
Claim 7
Independent Claim
212 words
A method for continuously filtering a liquid-solid feed material, comprising: a. passing precoat material under pressure into a chamber having an inner and outer perforated cylindrical sleeve mounted therein in a spaced relationship and a filter media attached to the inner surface of said outer sleeve, said precoat material having a particle size large enough that the precoat is retained by the filter media; b. collecting said precoat material upon the filter media so that said precoat fills the space between the filter media and the inner surface of the inner sleeve; c. passing a liquid-solid feed material under pressure into the central portion of said chamber interiorly of said cylindrical sleeves; d. rotating a wiper blade assembly having at least one wiper blade attached to a first spirally-slotted hollow shaft rotatably mounted coaxially within said chamber, said wiper blade extending in a spiral around said first shaft and acting to constantly move collected solid material off of the interior surface of said inner sleeve, said first hollow shaft having at least one spirally-slotted portion for passage of solid material; e. removing the solid material which collects on the interior of said inner sleeve; and f. removing the liquid filtrate which collects between the outer sleeve and the walls of the chamber.
Claim 8
Dependent Claim
86 words
The method of claim 4, wherein a pair of concentric hollow shafts are coaxially mounted within said first hollow shaft, each shaft of said pair of shafts being provided with at least one slotted portion, the slotted portion of said first hollow shaft being intermittently aligned with the slotted portions of said pair of shafts during rotation of said first hollow shaft, and wherein said slotted portions of said pair of shafts are aligned when it is desired to remove solid filtered material from the chamber.
Claim 9
Dependent Claim
33 words
The method of claim 5, wherein at least one spirally-slotted portion of said first hollow shaft is aligned with said blade, and wherein the slotted portions of said pair of shafts are vertical.
Claim 10
Dependent Claim
27 words
The method of claim 4, wherein the precoat material and the feed material are passed into the chamber at a pressure of about 20 to 40 psi.
Claim 11
Dependent Claim
247 words
In a filter separator for continuously filtering a liquid-solid feed material, wherein the feed material passes outwardly from the center of the filter separator through an inner and outer perforated sleeve, said sleeves being mounted within said filter separator in a spaced relationship, and wherein a wiper blade assembly is employed interiorly of said inner sleeve to constantly move collected solid material off the interior surface of the inner sleeve, the improvement comprising: a filter media attached to and extending around the entire inner surface of said outer sleeve, said filter media being of a thickness such that a space remains between the filter media and the inner sleeve; the size of the perforations in said inner and outer sleeve being from about 1/32 to 3/16 inch in diameter; and a volume of precoat material in said space between the filter media and the inner sleeve, said precoat material being collected on the inner side of the filter media and completely filling said space and the perforations in the inner sleeve; said filter media having openings therein which are sufficiently small to prevent precoat material from passing through the openings; and wherein said wiper blade is freely rotatable inside said inner sleeve with a clearance being provided between said wiper blade and said inner sleeve; said improvement acting to enhance the continuous operation of said filter separator by preserving the precoat on the inner side of the filter media and preventing the blinding of the filter media.
Claim 12
Dependent Claim
247 words
In a filter separator for continuously filtering a liquid-solid feed material, wherein the feed material passes outwardly from the center of the filter separator through an inner and outer perforated sleeve, said sleeves being mounted within said filter separator in a spaced relationship, and wherein a wiper blade assembly is employed interiorly of said inner sleeve to constantly move collected solid material off the interior surface of the inner sleeve, the improvement comprising: a filter media attached to and extending around the entire inner surface of said outer sleeve, said filter media being of a thickness such that a space remains between the filter media and the inner sleeve; the size of the perforations in said inner and outer sleeve being from about 1/32 to 3/16 inch in diameter; and a volume of precoat material in said space between the filter media and the inner sleeve, said precoat material being collected on the inner side of the filter media and completely filling said space and the perforations in the inner sleeve; said filter media having openings therein which are sufficiently small to prevent precoat material from passing through the openings; and wherein said wiper blade is freely rotatable inside said inner sleeve with a clearance being provided between said wiper blade and said inner sleeve; said improvement acting to enhance the continuous operation of said filter separator by preserving the precoat on the inner side of the filter media and preventing the blinding of the filter media.
References Cited (Backward Citations)
US3574098A
Cited
US3953325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |