# US 12,214,381 B1 · Portable particulate grader > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,214,381 B1 - Document ID: US12214381B1 - Status: Granted - Kind: B1 - Application number: 18/525,541 - Filed: 2023-11-30 - Granted: 2025-02-04 - Earliest claimed: 2023-11-30 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Pravinkumar Patil; Jamal H. Khalaifa; Mohammad Almusaiteer - Web page: https://patentgrep.com/patent/US12214381B1 ## CPC - B07B 1/005: {Transportable screening plants} - B07B 1/04: Stationary flat screens - B07B 1/28: Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens - B07B 1/46: Constructional details of screens in general; Cleaning or heating of screens - B07B 13/16: Feed or discharge arrangements - 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 A portable particulate grader includes a grader body assembly and a grader tray assembly. The grader body assembly includes an upper housing including side portions, a plurality of springs, a lower chute, a dust control gate, and wheels. The springs are disposed on an inner portion of the upper housing, and hold a grader tray assembly in an angle and provide vibrations to the grader tray assembly. The grader tray assembly includes a grader tray frame, a detachable mesh disposed on the grader tray frame, an upper chute, and a residual control gate. A method for grading particulates includes introducing the input material to the detachable mesh, providing vibrations non-electrically to the grader to separate the input material into a filtered material and a residual material, opening the dust control gate to retrieve the filtered material, and opening the residual control gate to transfer the residual material. ## Claims ### Claim 1 A portable particulate grader, comprising: a grader body assembly comprising: an upper housing comprising side portions; a plurality of springs disposed on an inner portion of the upper housing and configured to hold a grader tray assembly in a descending angle toward a first side in a range of from 5 to 45 degrees, and provide vibrations to the grader tray assembly; a lower chute comprising a bottom portion and side portions, and located immediately below the upper housing; a dust control gate provided on a second side of the side portions of the lower chute; and wheels disposed on the grader body assembly; and the grader tray assembly comprising: a grader tray frame; a detachable mesh disposed on the grader tray frame to filter an input material; an upper chute located on a first side of the grader tray assembly; and a residual control gate located between the detachable mesh and the upper chute, wherein: the grader tray assembly is configured to be detachable from the grader body assembly, the upper housing, the lower chute and the grader tray assembly are configured to provide an enclosed space to prevent emission of a filtered material, and the portable particulate grader does not comprise an electrically-operated component. ### Claim 2 (depends on 1) The portable particulate grader of claim 1, wherein the bottom portion of the lower chute has a descending angle toward a second side in a range of from 5 to 60 degrees. ### Claim 3 (depends on 1) The portable particulate grader of claim 1, wherein the detachable mesh has a mesh size in a range of from 0.0625 to 1 inches. ### Claim 4 (depends on 1) The portable particulate grader of claim 1, wherein the plurality of the springs comprises four springs. ### Claim 5 (depends on 1) The portable particulate grader of claim 1, wherein a third side and a fourth side of the side portions of the upper housing has an upper edge having a substantially the same descending angle toward the first side as the descending angle of the grader tray assembly. ### Claim 6 (depends on 1) The portable particulate grader of claim 1, wherein the input material is selected from the group consisting of a catalyst, a desiccant, an activated carbon, a multimedia filter material, ceramic balls, industrial chemicals, absorbents in granular forms, air dryers, and silica particles. ### Claim 7 (depends on 1) The portable particulate grader of claim 1, wherein the side portions of the upper housing are made of a metallic material and comprise a non-metallic protection layer on a surface of the side portions that is facing the inner portion of the upper housing. ### Claim 8 (depends on 1) The portable particulate grader of claim 1, wherein the plurality of the springs are configured to hold the grader tray assembly in the descending angle toward the first side in a range of from 28 to 45 degrees. ### Claim 9 (depends on 1) A method for grading particulates, comprising: introducing the input material to the detachable mesh of the portable particulate grader of claim 1; providing vibrations non-electrically to the portable particulate grader to separate the input material into the filtered material and a residual material, wherein the vibrations transfer the filtered material into the lower chute and transfer the residual material toward the first side of the grader tray assembly, opening the dust control gate to retrieve the filtered material from the lower chute, and opening the residual control gate to transfer the residual material to the upper chute. ### Claim 10 (depends on 9) The method of claim 9, wherein the input material is selected from the group consisting of a catalyst, a desiccant, an activated carbon, a multimedia filter material, and ceramic balls. ### Claim 11 (depends on 9) The method of claim 9, wherein the providing of the vibration is conducted by manually providing an oscillatory movement to the portable particulate grader. ### Claim 12 (depends on 9) The method of claim 9, wherein the providing of the vibration is conducted for a duration in a range of from 3 minutes to 5 minutes. ### Claim 13 (depends on 9) The method of claim 9, further comprising inspecting the residual material prior to opening the residual control gate. ### Claim 14 (depends on 9) The method of claim 9, further comprising retrieving the residual material from the upper chute. ### Claim 15 (depends on 14) The method of claim 14, wherein the retrieval of the filtered material from the lower chute and the retrieval of the residual material from the upper chute is conducted simultaneously. ### Claim 16 (depends on 14) The method of claim 14, wherein the retrieving of the residual material is conducted by: directly attaching a container or a bag to the upper chute before the opening of the residual control gate; and allowing the residual material to flow into the container or the bag without an assistance upon opening of the residual control gate.