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Collection tank

  • US 10,563,375 B2
  • Filed: 02/08/2016
  • Issued: 02/18/2020
  • Est. Priority Date: 10/06/2006
  • Status: Active Grant
First Claim
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1. A mobile backfill system for collecting material, comprising:

  • a first pin;

    a collection tank comprising a body havinga closed end,an open end opposite the closed end and having a generally circular periphery,a central, generally cylindrical section extending between the closed end and the open end and defining a first hole configured to receive the first pin, anda door having a generally circular periphery and that is pivotable about a first axis between a first position, at which the door is spaced from the open end of the body, and a second position, at which the generally circular periphery of the door seats against the generally circular periphery of the open end, thereby closing the open end;

    a vacuum pump connected to the collection tank that draws an air stream through the collection tank for carrying material into the collection tank; and

    two dual arm linkages, each dual arm linkageextending between a respective first pivotal connection between said dual arm linkage and the door and a respective second pivotal connection between said dual arm linkage and the tank body, andhaving a first arm connected to the door at the respective first pivotal connection and a second arm connected to the body at the respective second pivotal connection, wherein the first arm and the second arm are pivotally connected at a respective third pivotal connection,wherein the two dual arm linkages are arranged on opposite sides of the collection tank so thata second axis extending through the first pivotal connections, a third axis extending through the second pivotal connections, and a fourth axis extending through the third pivotal connections are parallel to each other and to the first axis,when the door is in the first position, the first axis, the second axis, and the fourth axis are on a first side of a plane that includes the third axis and that, when the door is in the second position, also includes the second axis, andwhen the door is in the second position, the fourth axis is on a second side of the plane, opposite the first side of the plane,wherein one of the first arm and the second arm of one of the dual arm linkages defines a first through hole configured to receive the first pin and that aligns with the first hole when the door is in the first position, andwherein the first pin is simultaneously receivable through the first through hole and into the first hole to thereby retain the door in the first position.

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