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Housing for a flow cytometry apparatus with particle unclogging feature

  • US 4,790,653 A
  • Filed: 05/22/1986
  • Issued: 12/13/1988
  • Est. Priority Date: 05/22/1986
  • Status: Expired due to Term
First Claim
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1. A housing for a flow cytometry apparatus comprising:

  • a body member having a passageway therethrough for the passage of particles which are to be analyzed, said passageway including an analysis portion, a pre-analysis portion and a postanalysis portion;

    a first channel extending through said body member for fluid communication with the pre-analysis portion of said passageway for the introduction of a liquid for ensheathing said particles which flow into the analysis portion of said passageway;

    a second channel extending through said body member for fluid communication with the post-analysis portion of said passageway for the passage of particles and liquids out of said housing after passing through said analysis portion; and

    a plunger having an inner end slidably positioned in fluid-tight engagement in said post-analysis portion of said passageway and an outer end extending outwardly of said body member, said plunger being depressible within said post-analysis portion so that said inner end closes said fluid communication of said second channel with said post-analysis portion of said passageway thereby blocking the flow of liquids and particles from said housing through said second channel to create increased pressure in said passageway post-analysis portion for dislodging clogged particles or debris from said analysis portion.

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