# US 2014/0197092 A1 · Filtering device for highly viscous fluids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197092 A1 - Document ID: US20140197092A1 - Status: Published application - Kind: A1 - Application number: 14/119,208 - Filed: 2012-06-01 - Published: 2014-07-17 - Earliest claimed: 2011-06-01 - Assignees: Kreyenborg Verwaltungen und Beteiligungen KG - Inventors: Frank Hartmann; Robert Middler - Web page: https://patentgrep.com/patent/US20140197092A1 ## CPC - B01D 33/01: with translationally moving filtering elements, e.g. pistons (B01D33/04 - B01D33/327 take precedence) - B29C 48/6912: {the filters being fitted on a single rectilinearly reciprocating slide (B29C48/692 takes precedence)} - B29C 48/03: characterised by the shape of the extruded material at extrusion - 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) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) ## Abstract The invention relates to a filtering device (100) for highly viscous fluids, having at least two parallel screen plungers (11, 11′) which are arranged in a displaceable fashion in screen plunger bores of a housing (10) and which have in each case at least one screen cavity (13; 13′) in which at least one filter element (14, 14′) is arranged, wherein the housing (10) has an inflow opening (21) from which, on the untreated side, at least one flow duct (22) leads to each screen plunger bore, and said housing has at least one flow duct (32) which, on the clean side, leads from each screen plunger bore to an outflow opening (31). On the untreated side and/or on the clean side, in each case one common flow duct (22, 32) leads rectilinearly along both screen plunger bores and, in a production position, tangentially intersects the screen cavities (13; 13′). ## Claims ### Claim 1 A filtering device for highly viscous fluids, having at least two parallel screen bearing pistons, which are disposed in screen bearing piston holes of a housing such that they can be displaced, and which each exhibit at least one screen cavity, in which at least one filter element is disposed, wherein the housing exhibits an intake opening, from which, on the dirty side, at least one flow channel leads to each screen bearing piston hole, as well as at least one flow channel, which leads on the clean side from each screen bearing piston hole to a discharge opening, wherein the dirty side and/or on the clean side, in each case a collective flow channel is guided in a straight line along both screen bearing piston holes, which tangentially intersects the screen cavities when in an operational state. ### Claim 2 (depends on 1) The filtering device according to claim 1, wherein the screen bearing pistons are disposed above one another in the housing and the flow channels are disposed vertically. ### Claim 3 (depends on 1) The filtering device according to claim 1, wherein the intake opening and the discharge opening are disposed on an upper surface of the housing and a lower surface of the housing. ### Claim 4 (depends on 3) The filtering device according to claim 3, wherein the intake opening and the discharge opening are disposed on the lateral surfaces of the housing, and a horizontal supplementary channel leads from the intake opening and the discharge opening to the vertical flow channels. ### Claim 5 (depends on 1) The filtering device according to claim 1, wherein each screen bearing piston exhibits at least one pair of screen cavities, which are disposed on diametrically opposed sides of the screen bearing piston. ### Claim 6 (depends on 1) The filtering device according to claim 1, wherein each screen bearing piston exhibits at least two screen cavities, which are disposed on the screen bearing pistons such that they are axially offset to one another. ### Claim 7 (depends on 1) The filtering device according to claim 1, wherein on the dirty side, flow channels run in a straight line on both screen bearing piston holes and tangentially intersect the screen cavities when in the operational state, and in that, on the clean side, at least one flow channel is provided for each screen cavity, which tangentially intersects the screen cavities or an exit channel connected thereto, and at the cross-section of which is oriented at an angle of 90°-120° to the first flow channels. ### Claim 8 (depends on 7) The filtering device according to claim 7, wherein the flow channels leading to the screen cavities lying above one another are aligned to one another in a V-shape, and join to form a collective discharge opening. ### Claim 9 (depends on 7) The filtering device according to claim 7, wherein the flow channels leading to the adjacent screen cavities extend in pairs to different sides of the housing, and are joined to form discharge openings by means of second flow channels that are aligned to one another in a V-shape.