Device for taking a liquid sample
First Claim
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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Accused Products
Abstract
Apparatus for taking up liquid batches, comprising a take-up tube (10), a metering pump (20) for drawing liquid into the take-up tube by suction, and a washing pump (30) which functions to pump washing solution through the take-up tube in a direction opposite to the liquid take-up direction, through the medium of a washing tube (50). The washing pump is a self-sealing displacement pump.
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Citations
5 Claims
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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. - View Dependent Claims (2, 3)
- 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,
- 4. The use in apparatus for the batch-wise take up of liquid of a displacement pump which sealingly closes a flexible washing tube when the pump is inactive, said apparatus comprising a flexible take-up tube (10), a dosing pump (20) for drawing liquid into the take-up 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 take-up direction of the liquid, through the medium of a flexible washing tube (50).
Specification