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PLUG UNIT AND CONNECTION SYSTEM FOR CONNECTING CAPILLARY TUBES, ESPECIALLY FOR HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY

  • US 20170003255A1
  • Filed: 09/19/2016
  • Published: 01/05/2017
  • Est. Priority Date: 05/22/2009
  • Status: Active Grant
First Claim
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1. A plug unit for connecting a plug capillary tube to a bushing unit, the plug unit including:

  • (a) a plug housing;

    (b) the plug capillary tube projecting axially through the plug housing;

    (c) an annular sealing element, in which a front end surface of the annular sealing element projects in an axial direction past a front end surface of the plug capillary tube;

    (d) wherein the plug housing is adapted to connect to the bushing unit;

    (e) a pressure piece configured to receive a rear portion of the annular sealing element;

    (f) wherein the pressure piece and the annular sealing element are both connected rigidly to the plug capillary tube so as to prevent relative movement between the pressure piece, the annular sealing element, and the plug capillary tube; and

    (g) wherein when a front end region of the plug capillary tube, the annular sealing element, and the pressure piece are configured to be inserted into a fully inserted position in a receptacle opening of the bushing unit, and the plug housing is placed in a connected position where the plug housing applies an axial force to the pressure piece, the annular sealing element, and the plug capillary tube so as to press at least the front end surface of the annular sealing element against a floor wall of a capillary tube receptacle opening of the bushing unit.

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