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Detection gate

  • US 9,303,446 B2
  • Filed: 11/29/2010
  • Issued: 04/05/2016
  • Est. Priority Date: 12/02/2009
  • Status: Active Grant
First Claim
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1. Detection gate intended to detect substances carried by an individual or an object, the detection gate comprising:

  • two lateral uprights facing each other and defining there between them a passage for said individual or said object,a blowing chamber realized in one of the lateral uprights, emerging in the passage through only one first ventilated wall through which air in the blowing chamber is blown and comprising blowing means;

    an exhaust chamber realized in the other lateral upright, emerging in the passage through only one second ventilated wall through which the air in the passage is sucked and comprising exhaust means able to suck in the air through said second ventilated wall, the second ventilated wall facing the first ventilated wall,a detection device disposed downstream from the passage and able to detect the presence of said substances in the air thus blown,a transfer pipe emerging through a first end in the blowing chamber and through a second end in the exhaust chamber,the blowing means being adapted to blow the air contained in said blowing chamber through said first ventilated wall directly towards said second ventilated wall and then through the transfer pipe,the blowing means and the exhaust means being such that a same volume of unfiltered air is recirculated across the passage at least twice before said individual or said object passes through said passage; and

    the transfer pipe has a discharge flap configured to move from a closed position to an open position after a detection of a substance by the detection device.

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