# US 9,517,425 B2 · Filter element, method for manufacturing and use thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,425 B2 - Document ID: US9517425B2 - Status: Granted - Kind: B2 - Application number: 14/787,177 - Filed: 2014-05-09 - Published: 2016-04-21 - Granted: 2016-12-13 - Earliest claimed: 2013-05-13 - Assignees: Valmet Technologies Oy - Applicants: Valmet Technologies Oy - Inventors: Rauno Nordfors; Marko Salmela; Sanna Uusitalo - Web page: https://patentgrep.com/patent/US9517425B2 ## CPC - B01D 29/41: mounted transversely on the tube - B01D 25/00: Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D29/39) - B01D 25/001: {Making filtering elements not provided for elsewhere} - B01D 25/164: Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates (B01D25/127, B01D25/172, B01D25/176, B01D25/19 take precedence) - B01D 25/176: attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates - B01D 29/90: for feeding - B01D 33/23: Construction of discs or component sectors thereof - B01D 39/083: {of organic material} - B01D 2201/0415: Details of supporting structures - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract The invention relates to a filter element, a method for manufacturing the filter element, and use. The filter element (1) is formed of a solid-liquid filter fabric (2) and has at least one separately manufactured support element (14) fastened to it. The support is a plate-like piece. ## Claims ### Claim 1 Filter element for solid-liquid filtering, the filter element comprising: at least one filtering portion made of a solid-liquid filter fabric; at least one flow opening; and at least one support element, wherein: the support element is a plate-like piece defining a polymer plate structure that differs from a structure of the solid-liquid filter fabric; the support element is made of at least one of polypropylene or polyurethane; the support element is permanently fastened to the solid-liquid filter fabric of the at least one filtering portion of the filter element via stitches; and the support element includes at least one positioning member configured to prevent a separate feed member connected to the filter element from turning relative to the at least one flow opening. ### Claim 2 (depends on 1) The filter element as claimed in claim 1, wherein: the filter element comprises side surfaces; the support element comprises side surfaces; and said side surfaces are arranged against each other and fastened together. ### Claim 3 (depends on 1) The filter element as claimed in claim 1, wherein: the support element has the shape of a plate-like annular piece with an inner diameter and an outer diameter; and said inner diameter serves as said at least one flow opening. ### Claim 4 (depends on 1) The filter element as claimed in claim 1, wherein the support element has a thickness from 1 to 2 mm. ### Claim 5 (depends on 1) The filter element as claimed in claim 1, wherein the support element is made of the same material as the solid-liquid filter fabric. ### Claim 6 (depends on 1) The filter element as claimed in claim 1, wherein: the filter element is a filter element for a vertical chamber filter; the filter element is a planar piece with a horizontal top edge and bottom edge, and vertical side edges; and the filter element further comprises mounting means for supporting the filter element between filter plates of the vertical chamber filter. ### Claim 7 (depends on 1) Use of the filter element of claim 1 in a vertical chamber filter, said use comprising: filtering slurry through the filter element, whereby solid matter particles that do not penetrate the filter element form a solids cake on the surface of the filter element and the filtered liquid is allowed to pass through the filter element; and positioning the filter element, during the filtering of the slurry, between filter plates of the vertical chamber filter, thereby restricting a filter chamber of the vertical chamber filter. ### Claim 8 (depends on 1) The filter element of claim 1, wherein the at least one positioning member comprises at least four positioning members located at regular intervals around the at least one flow opening. ### Claim 9 (depends on 1) The filter element of claim 1, wherein the at least one positioning member is at least one of a slot provided on the periphery of the at least one flow opening or an opening formed at a distance from an edge of the at least one flow opening. ### Claim 10 A method for manufacturing a filter element, the method comprising the steps of: forming at least one filtering portion of the filter element of a solid-liquid filter fabric; forming a support element separate and distinct from the at least one filtering portion of the filter element, wherein the support element includes at least one positioning member configured to prevent a separate feed member connected to the filter element from turning relative to at least one flow opening of the filter element; fastening the support element to the at least one filtering portion of the filter element before the filter element is mounted to a filtering device; defining a polymer plate structure via the support element, whereby the structure of the support element differs from a structure of the solid-liquid fabric; using at least one of polypropylene or polyurethane as the material of the support element; arranging a side surface of the support element against a side surface of the solid-liquid filter fabric; and fastening said side surfaces of the support element and the solid-liquid filter fabric together via stitches. ### Claim 11 (depends on 10) The method of claim 10, wherein the at least one positioning member comprises at least four positioning members located at regular intervals around the at least one flow opening. ### Claim 12 (depends on 10) The method of claim 10, wherein the at least one positioning member is at least one of a slot provided on the periphery of the at least one flow opening or an opening formed at a distance from an edge of the at least one flow opening. ### Claim 13 An arrangement for solid-liquid filtering, the arrangement comprising: a filter element; and a feed member connected to the filter element, wherein the filter element comprises: at least one filtering portion made of a solid-liquid filter fabric; at least one flow opening; and at least one support element, wherein: the support element is a plate-like piece defining a polymer plate structure that differs from a structure of the solid-liquid filter fabric; the support element is made of at least one of polypropylene or polyurethane; the support element is permanently fastened to the solid-liquid filter fabric of the at least one filtering portion of the filter element via stitches; and the support element includes at least one positioning member configured to prevent the feed member from turning relative to the at least one flow opening. ### Claim 14 (depends on 13) The arrangement of claim 13, wherein the feed member comprises at least one protrusion configured to engage the at least one positioning member. ### Claim 15 (depends on 14) The arrangement of claim 14, wherein the at least one protrusion is a pin. ### Claim 16 (depends on 13) The arrangement of claim 13, wherein the at least one positioning member comprises at least four positioning members located at regular intervals around the at least one flow opening. ### Claim 17 (depends on 13) The arrangement of claim 13, wherein the at least one positioning member is at least one of a slot provided on the periphery of the at least one flow opening or an opening formed at a distance from an edge of the at least one flow opening.