# US 11,305,314 B2 · Separator screen in discs or stars for waste, axle usable in such screen as well as method for modifying a separator screen in discs or stars for waste > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,314 B2 - Document ID: US11305314B2 - Status: Granted - Kind: B2 - Application number: 15/733,721 - Filed: 2019-04-08 - Published: 2021-05-27 - Granted: 2022-04-19 - Earliest claimed: 2018-04-12 - Applicants: Geo S.A.S. Di Tazzoli Antonio & C. - Inventors: Antonio Tazzoli - Web page: https://patentgrep.com/patent/US11305314B2 ## CPC - B07B 1/15: using corrugated, grooved or ribbed rollers - B07B 1/155: {the rollers having a star shaped cross section} - B07B 1/46: Constructional details of screens in general; Cleaning or heating of screens - B07B: SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL (wet separating processes, sorting by processes using fluent material in the same way as liquid B03; combinations of dry separating apparatus with wet separating apparatus B03B; using liquids B03B, B03D; sorting by magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high voltage electric fields B03C; centrifuges or vortex apparatus for carrying out physical processes B04; hand sorting, postal sorting, sorting by switching or other devices actuated in response to detection or measurement of some feature of articles or samples of material B07C) ## Abstract An axle useable in a disc or star separator screen for waste includes a rotation shaft defining a longitudinal axis, a plurality of discs or stars integrally coupled with the rotation shaft, and a plurality of anti-clogging sleeves mounted idle on the rotation shaft, each of the anti-clogging sleeves being interposed between a respective pair of consecutive discs or stars. Each anti-clogging sleeve has a first rotating element and a second rotating element arranged adjacent to each other, at least one of which is a tubular body. The rotating elements are mounted idle on the rotation shaft so as to rotate independently with respect to each other. ## Claims ### Claim 1 An axle useable in a disc or star separator screen (1) for waste, comprising: a rotation shaft (11) defining a longitudinal axis (X); a plurality of discs or stars (21, 21′) integrally coupled with said rotation shaft (11); and a plurality of anti-clogging sleeves (100) coupled coaxially with said rotation shaft (11), each of said anti-clogging sleeves (100) being interposed between a respective pair of consecutive discs or stars (21, 21′); wherein each of said plurality of anti-clogging sleeves (100) has at least one first rotating element (130) and at least one second rotating element (110′) arranged adjacent to each other, at least one of said at least one first rotating element (130) and at least one second rotating element (110′) being a tubular body, said at least one first rotating element and said at least one second rotating element (130, 110′) being mounted idle on said rotation shaft (11) so that said at least one first rotating element and said at least one second rotating element (130, 110′) rotate independently one with respect to the other, so that one of said at least one first rotating element and said at least one second rotating element (130, 110′) continues to rotate should another one of said at least one first rotating element and said at least one second rotating element (130, 110′) block due to dirt or foreign bodies. ### Claim 2 (depends on 1) A separator screen comprising a plurality of axles (10) according to claim 1. ### Claim 3 (depends on 1) The axle according to claim 1, further comprising at least one third rotating element (110) arranged adjacent to one of said at least one first rotating element (130) and said at least one second rotating element (110′), said at least one third rotating element (110) being also mounted idle on said rotation shaft (11) so that said at least one first rotating element (130), said at least one second rotating element (110′), and said at least one third rotating element (110) rotate independently one with respect to the other. ### Claim 4 (depends on 3) The axle according to claim 3, further comprising at least one first anti friction annular element (140) interposed between at least one of said plurality of discs or stars (21, 21′) and said at least one first rotating element and said at least one second rotating element (130, 110′), or at least one pair of first anti-friction annular elements (140) interposed between said plurality of discs or stars (21, 21′) and said at least one first rotating element and said at least one second rotating element (130, 110′) or said at least one second rotating element and said at least one third rotating element (110, 110′). ### Claim 5 (depends on 3) The axle according to claim 3, wherein a distance between said at least one first rotating element (130) and said at least one second rotating element (110′) or between said at least one first rotating element (130), said at least one second rotating element (110′), and said at least one third rotating element (110) is smaller than 1 mm. ### Claim 6 (depends on 3) The axle according to claim 3, wherein said at least one first rotating element (130) is interposed between said at least one second rotating element and said at least one third rotating element (110′, 110), said at least one first rotating element (130) being said tubular body. ### Claim 7 (depends on 6) The axle according to claim 6, wherein said at least one first rotating element (130) has a first outer diameter (D1), said at least one second rotating element and said at least one third rotating element (110′, 110) having at least one portion (112) with a second outer diameter (D4) greater than said first outer diameter (D1). ### Claim 8 (depends on 7) The axle according to claim 7, wherein said at least one second rotating element and said at least one third rotating element (110′, 110) are disc shaped. ### Claim 9 (depends on 8) The axle according to claim 8, wherein each of said plurality of discs or stars (21, 21′) has a central portion (25) facing said at least one first rotating element and said at least one second rotating element (130, 110′) and a portion (24) peripheral thereto. ### Claim 10 (depends on 9) The axle according to claim 9, wherein said plurality of discs or stars (21, 21′) have respective inner faces (22, 22′) which comprises said peripheral portion (24), said central portion (25) of said respective inner faces (22, 22′) including an annular recess (26), each of said at least one second rotating element and said at least one third rotating element (110′, 110) being inserted into a respective annular recess (26). ### Claim 11 (depends on 9) The axle according to claim 9, wherein each of said plurality of discs or stars (21, 21′) has at least one protection element (30, 30′) extending from said peripheral portion (24) in a transversal or perpendicular direction with respect to said longitudinal axis (X), said at least one protection element (30, 30′) including at least one annular-shaped radial portion (31) having a vacant end portion (32, 32′) facing or in contact with said at least one first rotating element (130) so as to minimize an entry of the dirt or the foreign bodies therebetween. ### Claim 12 (depends on 6) The axle according to claim 6 wherein said at least one first rotating element (130) comprises a pair of opposite ends (131, 131′), said at least one second rotating element and said at least one third rotating element (110′, 110) each having at least one support portion (115) for rotatably supporting the opposite ends (131, 131′) of said at least one first rotating element (130). ### Claim 13 (depends on 12) The axle according to claim 12, wherein said at least one first rotating element (130) has, at said opposite ends (131, 131′), a first predetermined diameter (D5), said at least one second rotating element and said at least one third rotating element (110′, 110) having, at the respective support portions (115), a second predetermined maximum diameter (D6) smaller than said first predetermined diameter (D5) so that a rotation of said at least one first rotating element (130) with respect to said at least one second rotating element and said at least one third rotating element (110′, 110) is eccentric. ### Claim 14 (depends on 12) The axle according to claim 12, wherein each of said opposite ends (131, 131′) comprises at least one first contact surface (132), each of said at least one second rotating element and said at least one third rotating element (110′, 110) having at least one second contact surface (113), said at least one first rotating element (130) and said at least one second rotating element and said at least one third rotating element (110′, 110) being mutually dimensioned in an axial direction so that said at least one first contact surface (132) and at least one second contact surface (113) are in mutual contact. ### Claim 15 (depends on 1) A method of modifying a separator screen (1) for waste, comprising: providing an axle having, a rotation shaft (11) defining a longitudinal axis (X), a plurality of discs or stars (21, 21′) integrally coupled with said rotation shaft (11), and a plurality of anti-clogging sleeves (100) mounted idle on said rotation shaft (11), each of said plurality of anti-clogging sleeves (100) being interposed between a respective pair of the plurality of discs or stars (21, 21′); and replacing said axle with a second axle according to claim 1.