LIQUID DOSER Russian patent published in 1999 - IPC

FIELD: medical engineering. SUBSTANCE: doser is used for automatic conversion of continuous liquid flow of low flow rate to discrete doses of high flow rate. Doser has accumulating vessel, inlet branch pipe, bellows and vacuum interruption tube-sensor. Novelty is in vacuum interruption mechanism made as tube- sensor communicating bellows neck with vessel is section located higher than suction end of bellows. It consists of vertically positioned rising and descending branches coupled to each other by elbow arranged above vessel. Rising branch has lower and upper sections. Flow area of lower section is lager than flow area of upper section. Joints of tube-sensor components are made for adjustment of length of rising branch upper section. EFFECT: extended range of liquid flow rate variation. 1 cl, 4 dwg