# US 2014/0190874 A1 · Portable classifier screen shaker assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190874 A1 - Document ID: US20140190874A1 - Status: Published application - Kind: A1 - Application number: 13/998,900 - Filed: 2013-12-18 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Inventors: Robert Rieck - Web page: https://patentgrep.com/patent/US20140190874A1 ## CPC - B07B 1/28: Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens - B07B 1/02: Hand screens - B07B 1/36: jigging or moving to-and-fro in more than one direction - 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 sifting screen shaker assembly defined by a generally vertical hollow frame includes a pivotally supported yoke at its base provided with a foot pedal at its apex to articulate a pair of vertical links that are confined in their motion by the convolutions of shaped apertures, with the ends of the links articulating a screen assembly supported within a hinged tray above a collection receptacle in which the sifted particulates passed by the screen assembly are collected while additional particulates are added. The particulates accumulated in the screen assembly are then periodically discarded by articulating the tray around its hinge. ## Claims ### Claim 1 A foot actuated apparatus for imparting foot actuated sifting movement to a screen assembly containing granular matter and deployed for concurrent receipt by way of manual translation of additional granular matter, comprising: a generally vertical support frame defined by an upper and a lower end and including an interior space conformed for receiving a collection receptacle proximate said lower end and a convolved aperture proximate said upper end; a pivotally mounted pedal deployed for said foot actuated movement proximate said lower end of said support frame and connected to articulate a link in an engaged translation confined within said convolved aperture; and mounting means operatively connected to said link for supporting said screen assembly above said collection receptacle in an alignment for said manual translation of said additional granular matter. ### Claim 2 (depends on 1) Apparatus according to claim 1, wherein: said mounting means includes a hinged connection to said screen assembly for the pivotal movement thereof to discard outside said interior space such portion of said particulate matter as may remain within said screen assembly. ### Claim 3 (depends on 2) Apparatus according to claim 2, wherein: said mounting means includes a supporting periphery hinged to a generally conforming structure supporting said screen assembly. ### Claim 4 (depends on 1) Apparatus according to claim 1, wherein: said pivotally articulated pedal includes a yoke connected at the apex thereof to said pedal and having the respective yoke portions pivotally supported for engagement of the free ends thereof to said link. ### Claim 5 (depends on 4) Apparatus according to claim 4, wherein: said mounting means includes a hinged connection to said screen assembly for the pivotal movement thereof to discard outside said interior space such portion of said particulate matter as may remain within said screen assembly. ### Claim 6 (depends on 5) Apparatus according to claim 5, wherein: said mounting means includes a supporting periphery hinged to a generally conforming structure supporting said screen assembly. ### Claim 7 Apparatus for imparting sifting movement to a screen assembly containing granular matter therein by way of foot articulation concurrent with the manual translation of additional granular matter into said screen assembly, comprising: a generally vertical support frame defined by an upper and a lower end and including an interior space conformed for receiving a collection receptacle proximate said lower end and a convolved aperture proximate said upper end; a pivotally mounted pedal deployed within said interior space proximate said lower end of said support frame and connected to articulate a link in an engaged translation within said convolved aperture; and mounting means operatively connected to said link for supporting said screen assembly above said collection receptacle. ### Claim 8 (depends on 7) Apparatus according to claim 7, further comprising: a base plate deployed within said lower end of said support frame. ### Claim 9 (depends on 8) Apparatus according to claim 8, wherein: said pivotally articulated pedal includes a yoke connected at the apex thereof to said pedal and having the respective yoke portions pivotally supported on said base plate for engagement of the free ends thereof to said link. ### Claim 10 (depends on 9) Apparatus according to claim 9, wherein: said mounting means includes a hinged connection to said screen assembly for the pivotal movement thereof to discard outside said interior space such portion of said particulate matter as may remain within said screen assembly. ### Claim 11 (depends on 10) Apparatus according to claim 10, wherein: said mounting means includes a supporting periphery hinged to a generally conforming structure supporting said screen assembly. ### Claim 12 (depends on 11) Apparatus according to claim 11, wherein: said screen assembly is removable from said conforming structure; and said collection receptacle is removable from said interior space.