US20050230294A1 - Center flow perforated plate filter - Google Patents
Center flow perforated plate filter Download PDFInfo
- Publication number
- US20050230294A1 US20050230294A1 US11/105,838 US10583805A US2005230294A1 US 20050230294 A1 US20050230294 A1 US 20050230294A1 US 10583805 A US10583805 A US 10583805A US 2005230294 A1 US2005230294 A1 US 2005230294A1
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- United States
- Prior art keywords
- segments
- end plates
- edge
- conveyor
- chains
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
- E02B8/023—Arresting devices for waterborne materials
- E02B8/026—Cleaning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/056—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/29—Filters with filtering elements which move during the filtering operation the movement of the filter elements being a combination of movements
- B01D33/327—Tipping buckets, trays or like sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/333—Filters with filtering elements which move during the filtering operation with individual filtering elements moving along a closed path
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
- B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
Definitions
- Each of the seal plates located between the chains and the end plates.
- Each of the seal plates has a first portion rigidly mounted to one of the end plates and a second portion that overlaps with and is pivotal to an adjacent one of the end plates to block fluid flow through the V-shaped gap.
- FIG. 5 is a sectional view of one of the screen members of FIG. 4 , taken along the line 5 - 5 of FIG. 4 but not showing the end seal plates.
- a pair of deflector plates 23 mounts to the forward side of filter 11 .
- Deflector plates 23 extend from filter 11 to the side walls of channel 13 . Deflector plates 23 converge toward each other to direct all of the flow in channel 13 into the interior of filter 11 between the two conveyor runs 15 a , 15 b .
- Filter 11 has a frame or housing with a closed downstream wall 25 , forcing all of the fluid to flow simultaneously through conveyor runs 15 a , 15 b and trapping filtered material or filtered material on the inner sides of conveyor runs 15 a , 15 b .
- Conveyor 15 is configured in a stair-step configuration.
Abstract
A waste water filter has a perforated conveyor made up of a plurality of segments. Each of the segments has a shelf portion to lift trapped filtered material. Drive chains on opposite sides of the conveyor rotate the conveyor in an oblong loop. End plates on the ends of each segment have leading and trailing edges that extend at an acute angle relative to one another. Each of the end plates is rigidly mounted to a link of one of the chains. A socket mounted on a first edge of each of the segments engages a rod mounted on a second edge of an adjacent segment. Seal plates are located between the chains and the end plates. Each of the seal plates is rigidly mounted to one of the end plates and has an overlapping portion that extends alongside in sliding contact with an adjacent one of the end plates.
Description
- This application claims priority to provisional application 60/561,964, filed Apr. 14, 2004.
- This invention relates in general to large screen filters, and particularly to a filter that utilizes a conveyor of perforated plates with the flow entering a central area between the upward and downward runs of the conveyor.
- Large filtration units are used by municipalities and various industries to filter material from the water. One type of filter uses a perforated conveyor having a large number of apertures. The conveyor is rotated in an oblong loop as the water flows through the conveyor. The conveyor is made up of a number of segments pivotally linked to each other. Each segment has a shelf portion that lifts filtered material trapped by the conveyor.
- One type of unit is oriented normal to the direction of flow. The water flows through the upward moving run of the conveyor, then the downward moving run. Another type of unit, referred to herein as a center-flow unit, is oriented with the upward and downward moving runs in planes parallel with the direction of flow. The water enters an inlet between upward and downward moving runs and flows out both runs simultaneously.
- In both types, chains are located on opposite ends of the segments to drive the conveyor. A variety of devices are employed to connect the segments to the chains. Different types of seal members are used to block fluid flow outward past the ends of the segments. In one type that orients normal to the flow, the unit has end plates mounted to each segment, each end plate being rigidly fastened to one of the links of the chain. That unit also has a seal plate mounted to each end plate. In that unit, the leading and trailing edges of each end plate are parallel with each other. The edges of adjacent end plates are close together on the linear portions of the conveyor and separate at the curved portions. The seal plate has a portion that overlaps an adjacent end plate to block a portion of the gap created at the curved portions. The seal plates have concave and convex edges that slidingly engage each other. While workable for a normal-to-flow filter, a conveyor with end plates and seal plates as described would not work with a center flow type filter.
- In this invention, the filter has a perforated conveyor for placement in a fluid flow to trap filtered material. The conveyor has a plurality of segments pivotally linked together, each of the segments having a shelf portion to lift trapped filtered material. A socket is mounted on a first edge of each of the segments. A rod is rigidly mounted to a second edge of each of the segments. The rod of each of the segments fits within the socket of an adjacent one of the segments to pivotally link the segments together.
- End plates are rigidly mounted on opposite ends of each of the segments. Each of the end plates has leading and trailing edges that extend at an acute angle relative to one another. The leading edge of each of the segments is at an acute angle relative to the trailing edge of an adjacent one of the segments while on a linear portion of the conveyor, creating a V-shaped gap. The gap closes up while the segments round the axis at each end.
- A plurality of seal plates located between the chains and the end plates. Each of the seal plates has a first portion rigidly mounted to one of the end plates and a second portion that overlaps with and is pivotal to an adjacent one of the end plates to block fluid flow through the V-shaped gap.
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FIG. 1 is a schematic sectional view taken along the line 1-1 ofFIG. 2 of a center flow perforated plate filter constructed in accordance with this invention. -
FIG. 2 is a schematic sectional view of the filter ofFIG. 1 , taken along the line 2-2 ofFIG. 3 . -
FIG. 3 is a front view of the filter ofFIG. 1 . -
FIG. 4 is an enlarged partial sectional view, taken along the line 4-4 ofFIG. 7 , of two of the screen members and portions of the chain drive. -
FIG. 5 is a sectional view of one of the screen members ofFIG. 4 , taken along the line 5-5 ofFIG. 4 but not showing the end seal plates. -
FIG. 6 is an elevational view of one of the end seal plates utilized with the screen members ofFIG. 4 . -
FIG. 7 is a sectional view of three of the screen members as shown inFIG. 4 , taken along the line 5-5, and also showing the end seal plates. -
FIG. 8 is a sectional view of a portion of the conveyor, taken along the line 8-8 ofFIG. 7 . -
FIG. 9 is a view similar toFIG. 7 , but taken at an upper turnaround of the conveyor run. - Referring to
FIGS. 1-3 ,filter 11 is typically mounted in aflow channel 13, but it could also be connected into a flow line.Filter 11 has a rotatingconveyor 15 that has anupward run 15 a and adownward run 15 b, shown inFIG. 2 . While upwardrun 15 a is shown on the right side inFIG. 2 ,conveyor 15 could alternately be made to rotate clockwise. Adrive member 17 rotatesconveyor 15, drivemember 17 preferably being a pair of chain sprockets driven by anelectrical motor 19.Drive member 17 could alternately be powered by a hydraulic or pneumatic motor.Drive member 17 could also be located on the outer side of the housing offilter 11.Drive member 17 andmotor 19 are preferably located on the upper end. A lower turn aroundmember 21, such as guides or sprockets, is located at the lower end. Drive member rotatesconveyor 15 along an oblong path with twostraight portions - A pair of
deflector plates 23 mounts to the forward side offilter 11.Deflector plates 23 extend fromfilter 11 to the side walls ofchannel 13.Deflector plates 23 converge toward each other to direct all of the flow inchannel 13 into the interior offilter 11 between the two conveyor runs 15 a, 15 b.Filter 11 has a frame or housing with a closeddownstream wall 25, forcing all of the fluid to flow simultaneously through conveyor runs 15 a, 15 b and trapping filtered material or filtered material on the inner sides of conveyor runs 15 a, 15 b.Conveyor 15 is configured in a stair-step configuration. Upward run 15 a lifts the filtered material until reachingdrive member 17, where the filtered material is dislodged, such as by brushes or downwardly directedspray nozzles 26. The filtered material falls into achute 27 or conveyor that delivers the filtered material fromchannel 13.FIG. 2 also discloses anaccess door 31 to provide access toconveyor 15. Additionally,FIG. 3 shows agear reducer 29 thatcouples motor 19 to drive member 17 (FIG. 2 ). - Referring to
FIG. 4 ,conveyor 15 is made up of a plurality of individual segments orscreen members 33. Eachscreen member 33 is pivotally linked toadjacent screen members 33 to make upconveyor 15. As shown inFIG. 5 , eachscreen member 33 has alifting shelf 33 a that rotationally leads ariser 33 b that extends diagonally from thelifting shelf 33 a.Screen members 33 have a plurality ofperforations 35 extending throughout, although only a few are shown inFIG.4 . - Referring to
FIGS. 5, 7 and 9, in this embodiment,screen members 33 are pivotally linked and sealed to each other by arod 37 and asocket 39 in engagement with each other.Rod 37 is mounted to one edge of eachscreen member 33, which is shown in this embodiment to be the leading edge.Socket 39 is semi-cylindrical and is located on the opposite edge of eachscreen member 33.Rod 37 of onescreen member 33 slides intosocket 39 of theadjacent screen member 33, forming a seal.Socket 39 has aslot 41 through which the leading edge ofscreen 33 extends.Rod 37 could alternately be located on the trailing edge ofscreen member 33 andsocket 39 on the leading edge. - Referring to
FIGS. 5 and 7 -9, anend plate 43 is rigidly mounted to each end ofscreen 33, preferably by welding.End plate 43 has aleading edge 45, a trailingedge 47, aninner edge 49, and anouter edge 51. In the preferred embodiment,inner edge 49 is slightly concave andouter edge 51 is straight. Leading and trailingedges outer edge 51 toinner edge 49. An angle between two lines projecting from leading and trailingedges edge 45 and trailingedge 47 to provide access torod 37 andsocket 39. The cutouts enablerod 37 to slide from one end intosocket 39. - In this embodiment, a leading
hole 50 and a trailinghole 52 are located in eachend plate 43.Holes outer edge 51 and intersectsrod 37 andsocket 39.Outer edge 51 is parallel to conveyor runs 15 a, 15 b. Liftingshelf 33 a is at an angle that is preferably slightly less than 90 degrees relative toouter edge 51 for retaining filtered material on upward conveyor run 15 a. - Referring to
FIGS. 6-9 , aseal plate 53 is rigidly secured to the outer side of eachend plate 43.Seal plates 53 serve to prevent leakage of channel fluid and the passage of filtered material laterally outward through gaps between the leading and trailingedges adjacent end plates 43. Eachseal plate 53 is preferably formed of an elastomeric material, such as ultra-high molecular weight plastic, but they could also be of metal. Eachseal plate 53 has aleading edge 55 that is concave. The trailing edge has anouter portion 57 a that is straight and aninner portion 57 b that is concave at approximately the same radius as leadingedge 55.Seal plate 53 has aninner edge portion 59 that is straight and parallel to anouter edge 61 in this embodiment. Trailing edgeouter portion 57 a extends from trailing edgeinner portion 57 b toouter edge 61 at an angle that is about 45 degrees in this embodiment. -
Seal plate 53 has a leadinghole 63 and a trailinghole 65 for receiving fasteners.Holes outer edge 61. A recess orcutout 67 extends from trailing edgeouter portion 57 a selected distance inward to allow pivotal movement of eachseal plate 53 with theend plate 43 of anadjacent screen member 33. - Each
end plate 43 has an overall axial length Le measured parallel toinner edge 51 fromsocket 39 torod 37. Eachseal plate 53 has a greater overall axial length Ls measured from the junction of trailingedge portions edge 55 extends. The curved leading and trailingedges adjacent seal plates 53 are closely spaced to each other to block outward flowing leakage. The transverse distance or height frominner edge 59 toouter edge 61 of eachseal plate 53 is greater than the transverse distance or height fromouter edge 51 toinner edge 49 of eachend plate 43. Consequently,seal plates 53 protrude inwardly more thanend plates 43, as shown inFIGS. 7 and 9 . - As illustrated in
FIG. 4 , preferablychains 69 on each end ofconveyor 15 engage the sprockets of drive member 17 (FIG. 2 ) to rotateconveyor 15. Preferably, tension does not pass throughrods 37 andsockets 39, rather the tensional force due to movement ofconveyor 15 passes throughchains 69.End plates 43 andseal plates 53 are fastened to each link ofchains 69 for being pulled along conveyor runs 15 a and 15 b. The ends ofrods 37 are spaced fromchains 69 by clearances and are not directly connected tochains 69. - Each
seal plate 53 is mounted to asingle end plate 43, but it is axially offset so that aleading edge 45 of eachend plate 43 leads theend plate 43 to which it is attached. Trailingedge 47 of eachend plate 43 leads trailingedge portions mating seal plate 53. Eachseal plate 53 overlaps in sliding engagement a substantial portion of the adjacent trailingend plate 43. - Leading
hole 63 ofseal plate 53 aligns with trailinghole 52 ofend plate 43 for receiving a fastener that also extends through a link ofchain 69. Trailinghole 65 ofseal plate 53 is aligned withrod 37 and a pin of chain 69 (FIG. 8 ). A separate fastener or a protruding end ofrod 37 locates in trailinghole 65 to prevent pivotal movement ofseal plate 53 with theend plate 43 to which it is fastened. Leadinghole 50 ofend plate 43 does not connect to any of theseal plates 53 in this embodiment. Rather, a fastener extends fromhole 50 into engagement with one side of a link ofchain 69.Cutout 67 inseal plate 53 allows arcuate pivotal movement of eachseal plate 53 relative to the adjacent laggingend plates 43 as they pass overdrive member 17 or lower arcuate portion 21 (FIG. 2 ). The fastener that extends fromhole 50 in theadjacent end plate 43 into engagement withchain 69 moves incutout 67, as can be seen by comparingFIG. 7 andFIG. 9 . Eachend plate 43 is thus secured to a link ofchain 69 by two fasteners. Eachseal plate 53 is secured to one of theend plates 43 at two points. - Referring to
FIGS. 7-9 ,sidewall portions filter 11 extend along the outer sides ofseal plates 53. A recess for each of thechains 69 is formed betweensidewall portions plates 53 slidingly engageframe portions frame portions end plates 43 into contact withchains 69.Sidewall portions arcuate portion 21 and at the upper end, as shown inFIG. 9 . - In operation, the
upward run 15 a will appear as shown inFIG. 7 . Chains 69 (FIG. 4 ) rotateconveyor 15, bringing filtered material up onshelves 33 a. Water enters between runs 15 a, 15 b (FIG. 2 ) and flows outwardly in opposite directions throughperforations 35 inscreen members 33. The engagement ofrods 37 withsockets 39 prevents any significant leakage from between theindividual screen members 33. The contact ofseal plates 53 withend plates 43 andhousing portions FIGS. 7 and 8 ) prevent leakage through the gaps between trailingedge 47 and leadingedge 45 of eachplate 43. - When going over drive
member 17 or lower arcuate curved portion 21(FIG.2 ), the gaps between leadingedge 45 and trailingedge 47 ofadjacent end plates 43 close up. Leadingedge 45 of oneend plate 43 becomes parallel and approximately touches trailingedge 47 of theadjacent end plate 43, as shown inFIG. 9 . The gap between end plate edges 45, 47 becomes smaller in the curved portions of the conveyor. Eachseal plate 53 is fixed relative to theend plate 43 to which it is attached, but pivots relative to theadjacent end plate 43. Consequently, the curved leading and trailingedges adjacent seal plates 53 slide relative to one another. The clearance is small, preventing substantial leakage. - While in the upward moving
run 15 a, as shown inFIG. 7 , or the downward movingrun 15 b, eachseal plate 53 fully eclipses or blocks the entire gap between end plate edges 45 and 47 ofadjacent end plates 43. Similarly, while in the arcuate upper portion, shown inFIG. 9 or the arcuate lower portion, eachseal plate 53 fully eclipses or blocks the entire gap between end plate edges 45, 47. - The invention has significant advantages. The rod and socket linkage provides an effective seal. The connection of the end plates with the chains transfers weight to the chains rather than through the rod and socket joint. The seal plates create a labyrinth seal, effectively sealing both during the linear portions and curved portions of the conveyor.
- While the invention has been shown in only one of its forms, it should be apparent to those skilled in the art that it is not so limited but is susceptible to various changes without departing from the scope of the invention. For example, one could also employ the rod and socket between screen members with a filter that mounts the conveyor normal to the flow.
Claims (19)
1. In a filter having a perforated conveyor for placement in a fluid flow to trap filtered material, a drive assembly for rotating the conveyor, the conveyor having a plurality of segments pivotally linked together, each of the segments having a shelf portion to lift trapped filtered material, the improvement comprising:
a socket mounted on a first edge of each of the segments; and
a rod rigidly mounted to a second edge of each of the segments, the rod of each of the segments being rotatably located within the socket of an adjacent one of the segments to pivotally link the segments together.
2. The filter according to claim 1 , wherein each of the sockets extends continuously a full width of each of the segments.
3. The filter according to claim 2 , wherein:
each of the sockets has a cylindrical interior with a slot extending the full width of each of the segments; and
each of the rods extends the full width of each of the segments, and the second edge of each of the segments extends through the slot of an adjacent one of the segments.
4. The filter according to claim 1 , wherein:
the drive assembly comprises a pair of chains, the chains being located on opposite sides of the conveyor; wherein end plates are secured to opposite sides of each of the segments; and
a fastener extends between each of the end plates of the segments and a link of one of the chains to secure the segments to the chains.
5. The filter according to claim 1 , wherein:
the drive assembly comprises a pair of chains, the chains being located on opposite sides of the conveyor and secured to the segments by fasteners; and
the rods have ends that are separated from the chains by a clearance so that lifting forces on each the segments pass from the end plates to the chains and not through the rods and sockets.
6. The filter according to claim 1 , further comprising:
end plates secured to opposite ends of each of the segments, each of the end plates having first and second edges extending at an acute angle relative to each other; and
a plurality of seal plates, each of the seal plates having a second portion pivotally mounted to one of the end plates and a first portion extending past the first edge of the end plate to which it is mounted and alongside in flush sliding contact with an adjacent one of the end plates.
7. The filter according to claim 6 , wherein the first edge of each of the end plates and the second edge of an adjacent one of the end plates are at an acute angle relative to one another while on linear portions of the conveyor, and substantially flush with one another while turning at ends of the conveyor.
8. In a center flow filter having a perforated conveyor for placement in a fluid flow to trap filtered material, a pair of chains on opposite sides of the conveyor for rotating the conveyor in a loop defining a linear upward moving run, an upper curved portion around an upper axis, a linear downward moving run, and a lower curved portion around a lower axis, the conveyor having a plurality of segments pivotally linked together, each of the segments having a shelf portion to lift trapped filtered material, the improvement comprising:
a plurality of end plates, the end plates being rigidly mounted on opposite ends of each of the segments, each of the end plates having leading and trailing edges, the leading edge of one of the end plates and the trailing edge of an adjacent one of the end plates having gaps between them while on the upward and downward moving runs that decrease while on the upper and lower curved portions of the conveyor; and
a plurality of seal plates located between the chains and the end plates, each of the seal plates having a first portion rigidly mounted to one of the end plates and a second portion that slidingly overlaps and is pivotal to an adjacent one of the end plates to overlay the gaps between adjacent ones of the end plates.
9. The filter according to claim 8 , wherein each of the chains has a plurality of links, and wherein each of the end plates and each of the seal plates are rigidly attached to one of the links.
10. The filter according to claim 8 , wherein the leading and trailing edges of each of the end plates extend at an acute angle relative to one another, creating a V-shaped gap between adjacent ones of the end plates while on the upward and downward moving runs and being substantially parallel while on the upper and lower curved portions of the conveyor.
11. The filter according to claim 8 , wherein:
each of the seal plates has a convex edge and a concave edge; and
the convex edge of each of the seal plates is in flush sliding engagement with the concave edge of an adjacent one of the seal plates while on the upward and downward moving runs.
12. The filter according to claim 8 , further comprising:
a frame that supports the conveyor; and
wherein the seal plates slidingly engage a portion of the frame to block filtered material from contact with the chain.
13. The filter according to claim 8 , further comprising:
a socket welded to a first edge of each of the segments, the socket having a cylindrical interior and an elongated slot; and
a cylindrical rod welded to a second edge of each of the segments, the rod of each of the segments being rotatably located within the socket of an adjacent one of the segments, the second edge extending through the slot.
14. A filter, comprising:
a frame having an inlet on one side and a closed opposite side;
a perforated conveyor having a plurality of segments pivotally linked together, each of the segments having a shelf portion to lift trapped filtered material;
a pair of chains on opposite sides of the conveyor for rotating the conveyor in a loop defining a linear upward moving run, an upper arcuate portion, a linear downward moving run, and a lower arcuate portion, the conveyor being oriented so that fluid flowing through the inlet of the frame passes first between the upward and downward moving runs, then outward through the upward and downward moving runs;
a plurality of end plates, the end plates being rigidly mounted on opposite ends of each of the segments, the end plate of adjacent ones of the segments having gaps between them while on the upward and downward moving runs, the gaps decreasing while on the upper and lower arcuate portions;
a socket mounted on a first edge of each of the segments, each of the sockets having a cylindrical interior and extending a full width of each of the segments, each of the sockets having a slot extending the full width of each of the segments;
a rod rigidly mounted to a second edge of each of the segments and extending a full width of each of the segments, the rod of each of the segments being rotatably located within the socket of an adjacent one of the segments and the second edge extending through the slot; and
a plurality of seal plates located between the chains and the end plates, each of the seal plates being rigidly mounted to one of the end plates and having an overlapping portion that extends alongside in sliding contact with an adjacent one of the end plates, each of the seal plates fully eclipsing one of the gaps between the end plates both while in the upward and downward moving runs and while in the upper and lower arcuate portions.
15. The filter according to claim 14 , wherein:
the frame has spaced-apart wall portions on each side that define a recess through which each of the chains extend; and
the seal plates slidingly engage the wall portions to reduce fluid flowing into contact with the chains.
16. The filter according to claim 14 , wherein each of the seal plates has a leading edge, a trailing edge, an outer edge and an inner edge, and wherein the outer edge has a portion located in the overlapping portion.
17. The filter according to claim 14 , wherein:
each of the end plates is secured to a link of one of the chains by a pair of fasteners; and
the overlapping portion of each of the seal plates pivots relative to the end plate being overlapped while passing through the arcuate portions of the conveyor and has a cutout to accommodate the pivotal movement relative to one of the fasteners of the end plate being overlapped.
18. The filter according to claim 14 , wherein:
each of the end plates has leading and trailing edges that extend at an acute angle relative to one another, the leading edge of each of the segments being at an acute angle relative to the trailing edge of an adjacent one of the segments while on the upward and downward moving runs, creating a V-shaped gap, and being substantially parallel while on the arcuate portions.
19. The filter according to claim 14 , wherein:
the rods have ends that are separated from the chains by a clearance so that lifting forces on each the segments pass from the end plates to the chains and not through the rods and sockets.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/105,838 US20050230294A1 (en) | 2004-04-14 | 2005-04-14 | Center flow perforated plate filter |
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US56196404P | 2004-04-14 | 2004-04-14 | |
US11/105,838 US20050230294A1 (en) | 2004-04-14 | 2005-04-14 | Center flow perforated plate filter |
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US20050230294A1 true US20050230294A1 (en) | 2005-10-20 |
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US11/105,838 Abandoned US20050230294A1 (en) | 2004-04-14 | 2005-04-14 | Center flow perforated plate filter |
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Cited By (7)
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US20070241039A1 (en) * | 2006-04-13 | 2007-10-18 | Wilcher Stephen B | Perforated plate element screen with sealed element design |
US20070272523A1 (en) * | 2006-05-11 | 2007-11-29 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Plate-link chain |
US7364036B2 (en) * | 2006-02-09 | 2008-04-29 | Habasit Ag | Module for a perforated flat top belt with hinge gap for better fluid flow |
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FR3013230A1 (en) * | 2013-11-20 | 2015-05-22 | Mediterranee Const Ind | FILTERING DRUM AND FILTERING PANEL WHICH CAN EQUIPATE SUCH A DRUM |
US20220023779A1 (en) * | 2020-07-23 | 2022-01-27 | Parkson Corporation | Bar screen filter apparatus and method |
US11535545B2 (en) | 2020-02-07 | 2022-12-27 | Mcfadden Engineering, Inc. | Anaerobic and aerobic treatment system and process for landfill wastewater |
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2005
- 2005-04-14 WO PCT/US2005/012914 patent/WO2005102494A1/en active Application Filing
- 2005-04-14 US US11/105,838 patent/US20050230294A1/en not_active Abandoned
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US7364036B2 (en) * | 2006-02-09 | 2008-04-29 | Habasit Ag | Module for a perforated flat top belt with hinge gap for better fluid flow |
US20070241039A1 (en) * | 2006-04-13 | 2007-10-18 | Wilcher Stephen B | Perforated plate element screen with sealed element design |
US7510650B2 (en) * | 2006-04-13 | 2009-03-31 | Wsg & Solutions, Inc. | Perforated plate element screen with sealed element design |
US20070272523A1 (en) * | 2006-05-11 | 2007-11-29 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Plate-link chain |
US7464810B2 (en) * | 2006-05-11 | 2008-12-16 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Plate-link chain |
US20090071893A1 (en) * | 2007-08-29 | 2009-03-19 | Martin Price | Bandscreen |
FR3013230A1 (en) * | 2013-11-20 | 2015-05-22 | Mediterranee Const Ind | FILTERING DRUM AND FILTERING PANEL WHICH CAN EQUIPATE SUCH A DRUM |
US11535545B2 (en) | 2020-02-07 | 2022-12-27 | Mcfadden Engineering, Inc. | Anaerobic and aerobic treatment system and process for landfill wastewater |
US20220023779A1 (en) * | 2020-07-23 | 2022-01-27 | Parkson Corporation | Bar screen filter apparatus and method |
US11633680B2 (en) * | 2020-07-23 | 2023-04-25 | Parkson Corporation | Bar screen filter apparatus and method |
Also Published As
Publication number | Publication date |
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WO2005102494A1 (en) | 2005-11-03 |
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Legal Events
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AS | Assignment |
Owner name: HEADWORKS, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SEIDL, GERALD;REEL/FRAME:016482/0683 Effective date: 20050414 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |