US 5,565,093 AGranted

Conveyor-band filter apparatus

OwnerDieter Frankenbergerinventor

Life of this patent

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Abstract

Conveyor-band filter apparatuses, so-called Paternoster filter rakes, which serve primarily for the mechanical cleansing of flowing sewage, are to be made capable by the invention of removing not only the normal filtered material, but also coarser fragments, from the conduit through which the sewage flows, without the usually steep conveying angle having to be varied; for this purpose, filter elements of the endless filter band are arranged in each case on the chain links and are designed on their end faces in such a way that only a small gap remains even in the state in which they are mutually pivoted relative to one another. Furthermore, attached to the filter elements are filter rakes forming a horizontal lifting face which extends transversely through the conduit and which can nevertheless be kept clean by corresponding stripping devices.

Claims23

Dependent claims

A conveyor-band filter apparatus for the mechanical cleansing of a liquid flowing in a conduit or the like and contaminated with solids, for filtering material from the liquid, said apparatus comprising:

(a) an endless filter band consisting of interconnected filter elements each displaceable relative to the other about a horizontal axis of articulation wherein, said filter band includes a first end disposed in the conduit and a second end located outside of the conduit and an elongated axis extending between said filter band ends and said filter elements are configured to allow liquid to flow therethrough and to trap filtered material for removal from the liquid;
(b) drive means located on both said ends of said filter band, said drive means including a chain drive with deflecting elements and two parallel, endless drive chains, coupled over said chain drive deflecting elements, each said drive chain being formed from a plurality of chain links that are connected together around said filter element axes of articulation wherein, said filter elements forming said filter band are rigidly fastened to said chain links to extend between parallel chain links;
and
(c) a frame mount which carries said chain drive deflecting elements and said filter band, said frame mount having an upper mount part which remains outside the conduit and to which at least one drive motor for said drive means is fastened at a location where filtered material removed from the liquid is discharged,
wherein, each said filter element is formed with an outer face and opposed end faces, each said end face being inwardly directed from said outer face towards said filter band elongated axis and defining a filter element projecting edge, said end faces being dimensioned so that said filter element projecting edges are located adjacent said filter element axes of articulation so that said projecting edges of adjacent said filter elements are located across said filter element axis of articulation around which said filter elmeents are disposed, and wherein at least one filter rake having a plurality of rake tines is fastened to at least one of the filter elements.

2 more elements

A conveyor-band filter assembly for cleaning liquid flowing through a conduit, the conduit having a floor, said assembly including:

a frame mount positioned to extend above the conduit;
lower and upper rotating chain wheels, said lower chain wheel being located in said the conduit adjacent the conduit floor, said upper chain wheel being attached to said frame mount above said conduit, each said chain wheel being configured to receive two spaced apart endless chains and a drive unit attached to said upper chain wheel;
two endless chains disposed over said chain wheels so as to be rotated by said chain wheels around an elongated filter band axis, each said endless chain being formed by a plurality of interconnected chain links wherein, said chain links forming each said endless chain are aligned with each other so as to define articulation axes that extend between said endless chains substantially horizontally across the conduit;
and
a plurality of filter units, each said filter unit extending across opposed chain links, each said filter unit including:
two side plates, each said side plate being attached to an inner side of one of said chain links;
a filter element secured between said side plates so as to extend therebetween, said filter element being configured to allow liquid flow therethrough and to remove material from the liquid and being shaped to have a main face that extends substantially across said side plates and opposed end faces integral with said main face, each said end face extending between said side plates and being directed inwardly relative to said main face towards said filter band axis and defining a filter element projecting edge positioned to be located adjacent said axis of articulation associated with said chain links with which said filter element is associated so that filter element projecting edges of adjacent said filter units are located adjacent said axis of articulation that is between said filter units;
and
a filter rake attached to a lower surface of each said filter element.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/417,603Filed 6 Apr 1995
Priority: EP 941054478 Apr 1994
Granted: 15 Oct 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

E02B 8/026
Arresting devices for waterborne materials: cleaning devices
B01D 33/275
With rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces: using contiguous impervious surfaces
B01D 33/333
Filters with filtering elements which move during the filtering operation: with individual filtering elements moving along a closed path
B01D 33/461
By scrapers, brushes nozzles or the like acting on the cake-side of the filtering element: brushes