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Device for analyzing a sample

  • US 6,001,307 A
  • Filed: 04/22/1997
  • Issued: 12/14/1999
  • Est. Priority Date: 04/26/1996
  • Status: Expired due to Term
First Claim
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1. A device for collecting a sample for analysis, comprising:

  • a main body;

    a suction pressure generator;

    a drawing channel formed in the main body in communication with the suction pressure generator, an opening in the main body being formed at the end of said drawing channel distal with respect to said suction pressure generator;

    an analytical section formed in said drawing channel between the suction generator and the opening; and

    a bypass channel formed in the main body and branching from the drawing channel at a position between the analytical section and the opening and in communication with the suction pressure generator,wherein in use a sample is drawn into the main body through the opening by suction pressure developed by said suction pressure generator, and then the sample is transferred by the suction pressure through the drawing channel into the analytical section, and wherein the relationship between a liquid flow resistance (X) in a first portion of the drawing channel between said analytical section and said suction pressure generator, a liquid flow resistance (Y) in the bypass channel and a liquid flow resistance (Z) in a second portion of the drawing channel between the position at which said bypass channel branches and said analytical section satisfies the inequality (X)>

    (Y)>

    (Z).

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