Backfill machine
OwnerWilliam B. Bishop, Francis G. Daviesinventors
Life of this patent
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Abstract
The invention comprises a mobile backfilling machine wherein raw materials located adjacent an excavated trench are picked up, graded and delivered to the open trench in an order of size grading from finest to coarsest, thereby providing a fine material padding for a product which has been placed into the trench. The machine may also be used to place a warning ribbon into the trench at a point above the padding.
Claims12
A machine for backfilling an excavated trench, the backfilling machine being adapted for continuous mobile operation over a berm containing raw materials, the berm being adjacent the excavated trench, the backfilling machine comprising:
- means for picking up at least a portion of the raw materials from the berm;
- means for producing at least one grade of fine material from the raw material;
- first means for transporting the raw material from said means for picking up the raw material to said means for producing at least one grade of fine material;
- and
- second means for transporting said at least one grade of fine material from said means for producing at least one grade of fine material to a position in the trench at a point which is longitudinally forward of said means for picking up and longitudinally forward of said means for producing said at least one grade of fine material.
A machine for backfilling an excavated trench, the backfilling machine being adapted for continuous mobile operation over a berm containing raw materials, the berm being adjacent the excavated trench, the backfilling machine comprising:
- means for picking up at least a portion of the raw materials from the berm;
- means for producing at least one grade of fine material from the raw material;
- first means for transporting the raw material from said means for picking up the raw material to said means for producing at least one grade of fine material;
- and
- second means for transporting said at least one grade of fine material from said means for producing at least one grade of fine material to a position in the trench at a point which is longitudinally forward of said means for producing said at least one grade of fine material;
- wherein said means for picking up at least a portion of the raw material from the berm further comprises:
- an auger assembly, said auger assembly comprising a left half auger having a left-handed pitch, a right half auger having a right-handed pitch, and a paddle assembly therebetween, said paddle assembly being located adjacent an input end of said first means for transporting, said left half auger, said right half auger and said paddle assembly being mounted on a common axis;
- means for engaging said auger assembly with the berm containing the raw materials;
- and
- means for rotating said auger assembly in a clockwise direction as viewed from a left end of said auger assembly.
Dependencies are inferred from the claim text.