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Particle dispensing apparatus and method

  • US 9,678,923 B2
  • Filed: 04/11/2013
  • Issued: 06/13/2017
  • Est. Priority Date: 04/12/2012
  • Status: Active Grant
First Claim
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1. Apparatus for dispensing a target number of particles from a source of a suspension of said particles into a collection vessel, said apparatus comprising:

  • a particle detecting device that has a detecting area and that detects particles passing through said detecting area;

    a conveyance device for conveying said suspension from said source through said detecting area and into said collection vessel;

    a mixing area downstream of said detecting area;

    a pump for supplying a dilution liquid from a diluent vessel to said mixing area;

    a controller for automated counting of particles passing through said detecting area and thereby obtaining a cumulative number of particles so detected, for comparing said cumulative number with said target number, and for generating a signal when said cumulative number equals said target number; and

    a shutoff device for interrupting flow of said suspension into said collection vessel upon receipt of said signal.

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