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Asphalt hopper heating system

  • US 4,812,076 A
  • Filed: 08/11/1986
  • Issued: 03/14/1989
  • Est. Priority Date: 08/11/1986
  • Status: Expired due to Fees
First Claim
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1. An asphalt hopper heating system, for use with a pavement patching vehicle used to patch pavement, the vehicle of the type having a supply hopper holding a supply of pavement patching material, the supply hopper mounted to the vehicle for movement between raised and lowered positions, the vehicle including an engine of the type producing a flow of heated exhaust gas from an exhaust port, the system comprising:

  • the supply hopper having a wall;

    the supply hopper including heating conduit means for creating a fluid path in thermal contact with the wall;

    a conduit pivotally mounted to the vehicle and to the supply hopper, the conduit and the heating conduit means having complementary mating elements defining openings into the conduit and the heating conduit means, the complementary mating elements forming a substantially sealed joint to fluidly couple the conduit and the heating conduit means only when the supply hopper is in the raised position; and

    an engine exhaust conduit connecting the conduit and the exhaust port so to permit passage of exhaust gas from the exhaust port, through the exhaust conduit, through the conduit, and through the heating conduit means of the supply hopper when the supply hopper is in the raised position.

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