Mechanized unit for protectively encasing a utility in a trench with processed excavated trench material

  • US 7,310,896 B2
  • Filed: 12/30/2005
  • Issued: 12/25/2007
  • Est. Priority Date: 11/24/2003
  • Status: Active Grant
First Claim
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1. A movable unit for screening excavated material to protectively cover or encase one or more utilities in an excavated trench in the ground comprising:

  • a screening member of a single layer screen mounted to the unit so as to be located below the ground surface within the trench and above the one or more utilities in the trench, said screening member having a plurality of sections of openings of progressively increasing size relative to the front of the unit;

    a plow for sweeping excavated material lying along at least one side of the excavated trench onto said screening member, wherein the excavated material swept onto said screening member passes through the sections of openings of progressively increasing size to deposit layers of particles of the excavated material of progressively increasing size onto the utility or utilities installed in the trench as the unit moves.

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