DE3307967A1 - Metering device for manual sample distribution - Google Patents

Abstract

The invention relates to a tongs-shaped device for manual sample distribution and metering of liquids, which comprises a tongs part, consisting of clamping jaws and a tongs handle, and a metering attachment. The latter is functionally adapted to a closing element, provided with pouring spout and riser, of the primary sample vessel and is connected to a diluter. The invention also relates to a method for manual sample distribution by means of the device described above.

Description

Dosing device for manual sample

distribution The invention relates to a new metering device for manual distribution of samples, especially patient and chemical sera Reagents, for preparing analytical measurements.

In a publication by H.D. Helb and G. Assmann in "GIT Laboratory Medicine" 6/80, pp. 465-475 (especially with regard to mechanized sample distribution in the clinical-chemical laboratory) a whole series of problems that the well-known Raise method for distributing samples, called. In particular, there is always the risk of sample contamination through carry-over of sample material or contamination. In addition, there are mechanized sample distributors, as they are there or in the DE-PSS 2 841 086 and 3 035 340 for the average laboratory doctor's practice too expensive.

The object of the present invention is therefore to provide an easy-to-use, Precisely dosing and carry-over-free working sample distribution device for to create the small and medium-sized laboratory doctor practice.

This problem is solved by a device which, like a usual Pliers (such as a pair of pliers) has clamping jaws, but which are in Rest position are kept closed. In doing so, they clasp the actual dosing device (Dosing attachment) in the front part of the dosing device. The jaws sit down away in a double pincer grip, which when pressed together against the resistance said spring opens the jaws.

The already mentioned (suitably made of plastic or metal) The dosing attachment is gripped by the clamping jaws when the dosing device is in the rest position. He sits in a plastic handle outside the clamping jaws away, at which the device is grasped during the dosing and distribution process can. The dosing device is guided by one in the device itself and air duct extending into a hose with a diluter of known type connected, which is connected to a (expediently attached to the handle of the dosing device) Contact can be started.

The dosing attachment is designed so that it can be used with primary sample vessels of the type shown in FIG. 7 of DE-PS 3 035 340, or on this functionally is adapted.

Such sample vessels have a hermetically sealing closure piece with beveled side surfaces to which the above-mentioned clamping jaws of the Can attack the dispensing tongs. The closure piece also has a pouring spout as well as a riser pipe protruding into the sample vessel (see also Fig. 4).

Accordingly, the dosing attachment is designed so that it can easily such a closure piece can be placed. It has an opening which advances into a downward widening gap. The spout can be used here slightly penetrate the primary vessel until its tip is in the opening or protrudes from it as the edges of the gap act as guides.

The above-mentioned air duct leading to the diluter also ends so that it is accurate with its air outlet opening when the dosing attachment is put on comes to rest over the riser pipe of the closure piece.

The invention is explained by way of example in the accompanying drawings: figure 1 shows the device according to the invention seen from above in the rest position (i.e. without a sample vessel to be attached).

Figure 2 shows the same device, also from above, but in the open Position; e.g. before placing it on the stopper of a primary vessel.

Figure 3 shows the same device in side view, on a sample vessel put on.

FIG. 4 shows a known primary sample vessel from the side with closure piece and the functionally adapted metering device.

For Figure 1: 1 shows the jaws of the pliers (closed), 2 the double pincer handle to open the clamping jaws, which in the rest position through a spring can be kept closed. 3 means the actual dosing attachment, 4 the handle for the dosing and distribution process and 5 the one attached to it Contact to start the diluter. 6 means the air supply hose to the diluter and 7 the opening receiving the pouring spout of the primary sample vessel.

Regarding Figure 2: Here is the same device with the jaws open and compressed handle shown.

Like numbers mean like elements.

To figure 3: Here the device is in the receiving position from the side (resp.

when the figure is rotated by approx. 1800) shown in metering position, with the primary sample container being held is clearly visible is. The numbers 1, 2 and 4 to 6 have the meaning given above, 8 means the primary sample vessel, 9 a separating filter inserted into the vessel, 10 the closure cap with pouring spout of the primary sample vessel.

Regarding FIG. 4: This figure shows an inserted into a sample stand 11 Primary sample vessel 9 with a closure piece 10 which has beveled attachment surfaces lOa for the Klernin jaws shows. In 12 is the pouring spout, in 13 it is in the sample vessel protruding riser pipe of the closure piece 10 is shown.

3 means the dosing attachment already shown in FIGS. 1 and 2. This shows an opening 14 for receiving the pouring spout 12 and an inner one Air duct 15, which is on one side in the hose leading to the diluter 6 (see Fig. 1 and 2), continues on the other side into the air outlet opening 16, which, in turn, when the metering device 3 is placed on the closure piece 10 presses onto the riser pipe 13.

The device described above allows for primary sample vessels with closure pieces of the type described and shown a quick and easy Sample distribution.

It is not - as with a pipette - a single or multiple withdrawal of the sample material possible with the corresponding risk of contamination; the maximal Sample amount is immediately available and there is a risk of evaporation or spillage of sample material does not exist. In addition, the device works with a high degree of accuracy, because it can be dosed precisely via the connected diluter.

The device described above works so that initially the double Pincer grip compressed and with it the jaws open will. The dosing attachment is then placed on the closure piece of the primary sample vessel placed in such a way that its spout slides into the opening of the dosing attachment and finally protrudes from this. At the same time the presses when putting on the Air outlet opening of the one located in the dosing attachment and leading to the diluter Air channel on the riser of the closure piece. The Pliers grip actuated the jaws and clamped the locking piece. will now the sample vessel is turned into the dispensing position and the one on the handle of the dosing attachment If the contact button located is actuated, the diluter comes into operation and presses for as long Air through the supply hose, the air duct and the riser tube into the primary sample vessel, until the specified amount of liquid has escaped from the vessel through the spout is.

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Claims (6)

Claims Plier-like designed dispensing device for manual Sample distribution, characterized in that it is in the rest position by a spring clamping jaws held closed, a double pincer handle to open the clamping jaws by means of compression as well as a dosing attachment partially encompassed by the clamping jaws, which on a provided with spout and riser pipe closure piece of primary sample vessels can be put on and is functionally adapted to this and which with a Diluter is connected via an air hose. 2eliDQsiergerät according to claim 1, characterized in that the Dosing attachment has a double pincer grip located outside of the clamping jaws Has partially enveloping handle. 3. Dosing device according to claim 1, characterized in that the handle has a contact for actuating the diluter. 4. Dosing device according to claim 1, characterized in that the dosing attachment a guide gap ending in an opening for receiving the pouring spout of the Has closure piece and an air channel for the compressed air supplied by the diluter, which can be pressed onto the riser pipe of the closure piece. 5. Method for manual distribution of samples, using a dispenser according to claim 1, characterized in that the clamping jaws of the pincer-shaped Part opened by squeezing the double pliers handle, the dosing attachment on the closure piece of the Primary vessel attached, the dosing device with the sample vessel held by him by means of the clamping jaws in the delivery position around 1800 swiveled and by means of the contact button attached to the handle of the dosing attachment the diluter is operated. 6. Use of a dispenser according to claim 1 for manual distribution of samples and for dosing liquids.