Patent ID: 6848633
Filing Date: 2005-02-01
Classification: B01L,B05B,G01N

Abstract:
1. An aspirating and dispensing/spraying device for use in a laboratory device, particularly in a testing and/or processing system for chemical materials or material mixtures, the aspirating and dispensing/spraying device having a tube whose front end has an outlet opening for dispensing a liquid sample that is introduced into this tube and to whose back end a liquid supply line is connected, the aspirating and dispensing/spraying device having a sleeve which encloses the tube at a distance and having a pressurized gas supply line for supplying pressurized gas into a space lying between the sleeve and the tube, the sleeve having a discharge opening on the front end in which the front end of the tube is positioned in such a way that an annular gap which ensures the release of pressurized gas remains free between the tube and the edge of the discharge opening, the aspirating and dispensing/spraying device thus forming a device for spraying the liquid sample by intensively mixing it with the gas, wherein the aspirating and dispensing/spraying device is implemented as a pipette for aspirating liquid samples through the outlet opening of the tube's front end, said tube carrying a sensor near said outlet opening for detecting a liquid surface during pipetting.