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Paving machine with mixing device and discharge conveyor assembly for remixing segregated paving materials

  • US 5,533,829 A
  • Filed: 05/02/1995
  • Issued: 07/09/1996
  • Est. Priority Date: 09/29/1994
  • Status: Expired due to Term
First Claim
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1. A paving machine comprising:

  • A. a portable chassis having front and rear ends;

    B. a gravity feed hopper located near the front end of said chassis, said gravity feed hopper having (1) an upper inlet, (2) front and rear walls, (3) side walls, (4) a transverse central portion and (5) a floor connecting said front and rear walls to one another and having a lower discharge opening formed therein at a location between said front and rear walls;

    C. a distributing auger mounted on said chassis near said rear end thereof and extending transversely across said chassis, for remixing segregated paving materials and distributing paving materials immediately adjacent a previously paved road segment;

    D. a remixing device which conveys paving materials transversely from said side walls toward said lower discharge opening while remixing said materials, said remixing device including a variable-pitch screw auger with i) a first flight section and ii) a second flight section, said second flight section being located transversely between said lower discharge opening and said first flight section, the pitch of said first flight section being lower than the pitch of said second flight section so that volumes bounded by flights of said second flight section are greater than volumes bounded by flights of said first flight section, so as to enable finer paving materials, located in said transverse central portion to enter void spaces in volumes bounded by flights of said second flight section and combine with coarser paving material, thereby remixing segregated paving materials; and

    E. a discharge conveyor assembly extending longitudinally and horizontally from said lower discharge opening of said gravity feed hopper to said distributing auger, said discharge conveyor assembly including a pair of parallel drag slat conveyors, each of said pair of parallel drag slat conveyors including a discharge end located directly above said distributing auger for discharging paving materials directly on top of said distributing auger, thereby remixing segregated paving materials.

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