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Collection tank

  • US 8,360,260 B2
  • Filed: 12/27/2010
  • Issued: 01/29/2013
  • Est. Priority Date: 10/06/2006
  • Status: Active Grant
First Claim
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1. A mobile digging and backfill system for removing and collecting material, comprising:

  • a wheeled vehicle chassis;

    a collection tank mounted to the chassis and comprising a body having a closed end, an open end opposite the closed end, a central section extending between the closed end and the open end, and a door having a generally circular periphery that is movable to seat against a generally circular periphery of the open end;

    a vacuum pump mounted to the chassis and connected to the collection tank that draws an air stream through the collection tank that carries material into the collection tank;

    a cross-member connected to the door on a side of the door opposite the collection tank'"'"'s open end at a center of the door'"'"'s generally circular periphery so that application of force to the cross-member in a direction toward the door and parallel to an axis passing through the center of the door'"'"'s generally circular periphery and a center of the collection tank'"'"'s closed end applies a closing force to the door parallel to the axis;

    wherein the cross-member is fixed in movement with respect to the door in a plane that includes the axis and that is perpendicular to a plane that includes both the axis and the force applied to the cross-member; and

    a linkage assembly coupled between the door and the tank body so that movement of the door to a closed position with respect to the body moves the linkage assembly to a position at which the linkage assembly retains the door in the closed position so that the door'"'"'s generally circular periphery seats against the open end'"'"'s generally circular periphery in a sealed contact.

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