RU1820872C - Pipet - Google Patents

Abstract

Usage: used to dispense fluid. SUMMARY OF THE INVENTION A pipette containing two or more cylinders placed along a longitudinal axis in one line, having sealed pistons at the top and an open end at the bottom, a mechanism for simultaneously moving pistons with a common drive bar, the last and upper ends of the pistons is made of polymer material in the form of one part, the pistons are equipped with elastic magnets made of polymer material worn on their lower ends. 1 ill.

Description

The invention relates to multichannel pipette designs and can be used in laboratory practice for dispensing a liquid.

The purpose of the invention is to simplify the design and assembly technology.

The drawing shows a pipette.

The pipette contains a drive bar 1 with a rod 2 and pistons 3, the cuffs 4 are put on the lower ends, the cuffs enter the cylinders 5 installed in the cylinder body 6, and replaceable tips 7.

The pipette works as follows.

In the initial position, before sampling the test fluid, under the action of the push button on the pipette handle (not shown in the drawing), the rod 2 with the strap 1 and pistons 3 moves down. Cuffs 4 made of a polymeric elastic material are moved downward in the glass cylinders by a predetermined distance. This creates a tight seal between the cuffs and the cylinders. Tips 7 are immersed in a vessel with the test fluid and release the push button. Under the action of springs (not shown in the drawing), pistons 3 with cuffs move upward, a vacuum is generated in the flat cylinders 5 of the cylinders 5 and the test fluid is sucked into the interchangeable tips 7. When the button is pressed again, the accumulated liquid is poured out.

Compared with the prototype, the number of parts in the attachment points of the upper and lower ends of the pistons is significantly reduced in the pipette, which reduces the complexity of manufacturing and simplifies the technology of its manufacture.

In this case, the properties of the pipette are improved due to the fact that the lateral mobility of the pistons, which is necessary during assembly, is achieved by fabricating them from a polymeric material.

Simplification of the design and manufacturing technology of multichannel pipettes will reduce their cost and cost.

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Claims (1)

to cite the production process. This is of great importance when serial production of pipettes is necessary for conducting mass analyzes in medicine, biology, microbiology and chemistry. SUMMARY OF THE INVENTION A pipette containing two or more cylinders arranged along a longitudinal axis in a single line, having sealed pistons at the top and open in the bottom - 10 the end, a mechanism for simultaneously moving pistons with a common drive bar, characterized in that, in order to simplify the design and assembly technology, the common drive bar and the upper ends of the pistons are made of polymer material in the form of a single part, the pistons are equipped with elastic fittings on their lower ends cuffs made of polymer material.