# US 10,307,794 B2 · Screen assembly for a vibrating screening machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,794 B2 - Document ID: US10307794B2 - Status: Granted - Kind: B2 - Application number: 15/540,462 - Filed: 2015-12-23 - Published: 2018-01-04 - Granted: 2019-06-04 - Earliest claimed: 2014-12-31 - Assignees: FP Canmechanica Inc. - Applicants: FP CanMechanica, Inc - Inventors: Dale R. Marshall; Daniel Guy Pomerleau - Web page: https://patentgrep.com/patent/US10307794B2 ## CPC - B07B 1/4663: {Multi-layer screening surfaces} - B01D 33/03: with vibrating filter elements - B07B 1/46: Constructional details of screens in general; Cleaning or heating of screens - B07B 1/4618: {Manufacturing of screening surfaces} - B07B 1/4645: {Screening surfaces built up of modular elements} - B07B 1/4672: {Woven meshes} - B07B 1/469: {Perforated sheet-like material} - B07B 2201/04: Multiple deck screening devices comprising one or more superimposed 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) - 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 According to one aspect there is provided a screen assembly for a vibrating screening machine. The screen assembly comprises a screen chassis and a screen for screening material such as a solution containing liquid and solids. The screen chassis comprises a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened. The screen is attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face. The screen chassis may be made of a light-weight, stiff material. The screen may be made of a durable material such as metal. A method for making a screen assembly is also provided. ## Claims ### Claim 1 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a first screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a second screen for screening the material, the second screen being attached to the second face of the screen chassis and covering the openings of the screen chassis at the second face; wherein the first screen has a first mesh size or perforation size, and the second screen has a second mesh size or perforation size. ### Claim 2 (depends on 1) The screen assembly of claim 1, wherein at least one of the first or second screen comprises a perforated plate. ### Claim 3 (depends on 2) The screen assembly of claim 2, wherein the perforated plate is formed from sheet metal. ### Claim 4 (depends on 1) The screen assembly of claim 1, wherein at least one of the first or second screen comprises a frame and a screening layer, the frame defining at least one opening, the at least one opening at least partially overlaying the openings of the screen chassis, the frame being attached to the screen chassis, the screening layer covering the at least one opening of the frame. ### Claim 5 (depends on 4) The screen assembly of claim 4, wherein the screening layer comprises a mesh. ### Claim 6 (depends on 4) The screen assembly of claim 4, wherein the at least one opening of the frame comprises a plurality of openings that are aligned with the openings of the screen chassis. ### Claim 7 (depends on 4) The screen assembly of claim 4, wherein the screen comprises metal. ### Claim 8 (depends on 7) The screen assembly of claim 7, wherein the frame is formed from sheet metal. ### Claim 9 (depends on 1) The screen assembly of claim 1, wherein the screen chassis comprises one or more of: plastic; aluminum; steel; and a composite material. ### Claim 10 (depends on 1) The screen assembly of claim 1, wherein the screen chassis is formed by a molding process. ### Claim 11 (depends on 1) The screen assembly of claim 1, wherein the first face of the screen chassis faces substantially upward when the screen assembly is mounted in the vibratory screening machine. ### Claim 12 (depends on 1) The screen assembly of claim 1, wherein the screen chassis comprises a grid structure defining the plurality of openings in the screen chassis. ### Claim 13 (depends on 12) The screen assembly of claim 12, wherein the grid structure of the screen chassis comprises a plurality of ribs parallel to the first and second faces, and a plurality of cross ribs parallel to the first and second faces and perpendicular to the ribs. ### Claim 14 (depends on 13) The screen assembly of claim 13, wherein one or more of the ribs or cross ribs extend between the first face and the second face of the screen chassis. ### Claim 15 (depends on 14) The screen assembly of claim 14, wherein one or more of the ribs and cross ribs extend only part way from the first face of the screen chassis toward the second face. ### Claim 16 (depends on 13) The screen assembly of claim 13, wherein screen comprises a frame and the frame of the screen comprises a grid structure that is aligned with the grid structure of the screen chassis. ### Claim 17 (depends on 15) The screen assembly of claim 15, wherein the one or more of the ribs and cross ribs extending only part way from the first face of the screen chassis toward the second face allow passage thereunder of solids caught by the second screen, and the one or more of the ribs or cross ribs extending between the first face and the second face of the screen chassis form channels therebetween for passage of the solids caught by the second screen. ### Claim 18 (depends on 1) The screen assembly of claim 1, wherein the first mesh size or perforation size is different than the second mesh size or perforation size. ### Claim 19 (depends on 18) The screen assembly of claim 18, wherein the first mesh size or perforation size is larger than the second mesh size or perforation size. ### Claim 20 (depends on 1) The screen assembly of claim 1, wherein at least one of the first or second screen is removably attached to the screen chassis such that the screen or the screen chassis is replaceable. ### Claim 21 (depends on 1) The screen assembly of claim 1, the screen chassis being a first screen chassis, and the screen assembly further comprising at least one additional screen chassis having openings therethrough, the first screen chassis and the at least one additional screen chassis being in a stacked formation with the openings of the first screen chassis being aligned with the openings of the at least one additional screen chassis, the screen assembly further comprising, for each pair of adjacent screen chassis, a respective additional screen, for screening the material, between the pair of adjacent screen chassis. ### Claim 22 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a first screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a second screen for screening the material, the second screen being attached to the second face of the screen chassis and covering the openings of the screen chassis at the second face; wherein the second screen comprises a frame defining at least one opening; and a mesh covering the at least one opening of the frame. ### Claim 23 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a first screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a second screen for screening the material, the second screen being attached to the second face of the screen chassis and covering the openings of the screen chassis at the second face; wherein the screen chassis defines a plurality of channels allowing solids caught by the second screen to move through the channels. ### Claim 24 (depends on 23) The screen assembly of claim 23, further comprising at least one open side allowing said solids caught by the second screen to exit from of the at least one open side. ### Claim 25 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a first screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a second screen for screening the material, the second screen being attached to the second face of the screen chassis and covering the openings of the screen chassis at the second face; wherein the second screen is removably attached to the screen chassis such that the screen assembly has a single screen configuration in which the second screen is not attached to the screen assembly, and a dual screen configuration in which the second screen is attached to the screen assembly. ### Claim 26 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a first screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a second screen that is removably attachable to the second face of the screen chassis such that the second screen covers the openings of the screen chassis at the second face and such that the screen assembly has a single screen configuration in which the second screen is not attached to the screen assembly, and a dual screen configuration in which the second screen is attached to the screen assembly. ### Claim 27 A screen assembly for a vibrating screening machine, the screen assembly comprising: a screen chassis comprising a first face and a second face opposite to the first face, the screen chassis defining a plurality of openings therethrough from the first face to the second face for allowing passage of a material that has been screened; a screen for screening the material, the screen being attached to the first face of the screen chassis and covering the openings of the screen chassis at the first face; and a frame attached to the second face of the screen chassis, the frame attached to the second face defining at least one opening at least partially overlaying the openings of the screen chassis at the second face.