Dewatering and classifying apparatus

Apparatus for dewatering sand and like particulate material comprising well means for containing sand and water, sloped surface discharge means for conveyance of the particulate material upwardly thereof, the sloped discharge means having a lower end in said well means and an upper end disposed above said well means, rake means for discharging particulate material out of said well means up said sloped discharge means, said rake means including a moveable elongate structure having a plurality of rake blades projecting downwardly therefrom, mounting means mounting said moveable elongate structure of said rake means for movement of said blades along said sloped surface discharge means in a discharging direction, and for return of said elongate structure and blades carried thereby away from said sloped discharge means, and including cylinder drive means for said moveable elongate structure of said rake means, said drive means including first cylinder means operable in a direction generally parallel to said sloped discharge means for driving said rake means in a particle discharge direction alternately upwardly and downwardly along and generally parallel to said sloped discharge means, and second cylinder means operable in a direction generally transverse to said sloped discharge means for driving a lower end of said rake means alternately toward and away from an associated end of said sloped discharge means, wherein said mounting means includes guide track means the upper end of which is pivotally mounted about a fixed pivot to the upper end of said sloped discharge means, and the lower end of which is connected to said second cylinder means for driving the lower end of said guide track means toward and away from said lower end of said sloped discharge means;

• wherein said first cylinder means have opposite ends carried by the said discharge means and an upper end of said rake means respectively, and wherein said second cylinder means have opposite ends carried by the said discharge means and a lower end of said guide track means respectively;
• wherein said first and second cylinder means are each of the hydraulic cylinder type;
• wherein guide wheels are provided carried by the upper end of said rake means and rotatably disposed within upper ends of portions of said track guide means, for rotatable guiding of said wheels therein upon activation of said first cylinder means in a particle discharge direction or the reverse, and wherein guide wheels are provided carried by the lower end portions of said track guide means for rotatable guiding of said wheels therein upon activation of said first cylinder means in a particle discharge direction or the converse;
• including water inlet means along opposite sides of said sloped discharge means, and with means being provided for adjustably facilitating the classifying of the particulate material.