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Device for taking a liquid sample

  • US 5,869,774 A
  • Filed: 04/09/1997
  • Issued: 02/09/1999
  • Est. Priority Date: 09/14/1994
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for taking-up liquid in batches, wherein the apparatus comprises a flexible take-up tube (10), a dosing pump (20) for drawing liquid into the tube (10) by suction, and a washing pump (30) which functions to pump washing solution through the take-up tube (10) in a direction opposite to the liquid take-up direction, through the medium of a flexible washing tube (50);

  • the improvement wherein the take-up tube (10) and the washing tube (50) are connected to one another and form the end parts of a tube system, wherein the dosing pump (20) is placed adjacent the mutually opposing ends of the tubes (10,

         50), and wherein the washing pump (30) is a displacement pump which functions to sealingly close the washing tube when the pump is inactive.

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