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1. (WO2018001645) METERING HEAD, METERING DEVICE COMPRISING A METERING HEAD, AND METHOD FOR METERING BY MEANS OF A METERING HEAD

Pub. No.:    WO/2018/001645    International Application No.:    PCT/EP2017/062568
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Thu May 25 01:59:59 CEST 2017
IPC: G01N 35/10
Applicants: EPPENDORF AG
Inventors: WILMER, Jens
Title: METERING HEAD, METERING DEVICE COMPRISING A METERING HEAD, AND METHOD FOR METERING BY MEANS OF A METERING HEAD
Abstract:
The invention relates to a metering head, comprising: a carrier, on which parallel attachments are arranged adjacent to each other, a stop plate, which has first holes, through which the attachments extend, wherein each attachment has the following features: a tube, which has a protruding supporting protrusion at the lower end, which supporting protrusion extends peripherally at least partially, a sleeve, which has a tapered section at the lower end and can be moved on the tube, and an elastomeric o-ring, which surrounds the tube, and the sleeves can be moved between a release position and a clamping position at a smaller distance from the supporting protrusions, in which clamping position the sleeves are pressed into the o-rings by means of the tapered sections and the o-rings are expanded, a first movement apparatus, which is designed to move the sleeves between the release position and the clamping position, a second movement apparatus, which is designed to move the stop plate between a stop position and a cast-off position at a smaller distance from the supporting protrusions, wherein the second movement apparatus has rocker arms, which are pivotably mounted on the carrier, transfer shafts, which are coupled to the sleeves and act on one end of respective rocker arms, and cast-off shafts, which are fixedly connected to the stop plate and lie against another end of respective rocker arms.