Eppendorf-netheler-hinz Gmbh

Eppendorf Geratebau Netheler + Hinz Gmbh

Heinz-Jurgen Gora

Hero Gerken

For the taking of liquid from large-volume, deep vessels by means of sucking vessels having short suction elements, a metered stand-by volume of liquid, which is accessible from above, is sucked from a volume of liquid of changing depth in the deep vessel and a defined sample of liquid is sucked from said stand-by volume at the same time. The auxiliary sucking device comprises a tube, which is adapted to be introduced into the deep vessel, and a check valve, which prevents a flow to the open bottom end of the tube. The tube is mounted on a bowl, which is adapted to be placed on the mouth of the deep vessel. The bowl preferably constitutes a portion of a housing in which the open top end of the tube is disposed close to the top wall of the housing. The top portion of the bowl contains an entrance opening, which is disposed above the stand-by volume of liquid, at least part of which is contained in the bowl. The entrance opening is adapted to receive the tip of a sample-taking vessel, which is provided with a piston. During the taking of each sample, a stand-by volume of liquid having a defined depth is provided in the housing.

Process of taking liquid from large-volume, deep vessels by means of

A plastic reaction vessel for holding a small quantity of liquid comprises a vessel body which has a body flange (4) surrounding an opening formed in the body, a cover, and a connecting strip (5) which is integral with the vessel body and the cover. Opposite to the connecting strip (5), the body flange (4) has a downwardly facing abutment surface (25), which is engageable by a hooklike extension (23), which is formed on the cover (6) and extends downwardly when the cover is closed. The connecting strip (5) comprises a hinge portion (12) between its opposite end portions. The cover comprise a cylindrical skirt, which is adapted to be inserted into the vessel body through the opening therein. A sealing lip (8) is provided on the outside of said skirt at that end thereof which is adapted to be inserted into the opening of the vessel body. The cover (6) has an outwardly protruding rim (16), from which a depending flange extends, which contacts the body flange so that a parallel guidance of the cover (6) is effected in conjunction with the hinge portion of the connecting strip. An alignment of the cover (6) is effected by the sealing lip (8), which is formed on the cylindrical skirt and in sealing contact with the inside surface of the vessel body.

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Hamburg, Germany

Heinz-Jurgen Gora