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Unidirectional flow pickup hood for street sweepers

  • US 4,109,341 A
  • Filed: 08/04/1977
  • Issued: 08/29/1978
  • Est. Priority Date: 02/05/1976
  • Status: Expired due to Term
First Claim
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1. In a debris pickup system for street sweepers or the like which comprises a vehicle carrying a hopper, blower means for withdrawing air from the hopper, a debris pickup hood having an air inlet line for receiving air from said blower means, and an air return line for delivering air and entrained debris from said hood to the hopper;

  • said hood extending laterally of the vehicle and comprising an elongate box like structure extending laterally of the vehicle, said air lines being connected adjacent opposite end portions of the hood;

    the improvement in said hood wherein said hood has top, side and end walls, the interior of said hood cooperating with the swept surface to provide a duct-like air chamber which is substantially unobstructed along its length for chanelling the air from said blower means into a substantially unidirectional stream of air from said air inlet line to said air return line, the top wall of said duct-like chamber being inclined downwardly from a zone upstream of said air return line to the air return line to provide an air deflector for progressively accelerating said unidirectional stream of air and entrained debris as the air stream sweeps the surface and approaches said air return line.

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