FIELD: hypodermics engineering.
SUBSTANCE: device has elongated body having longitudinal axis, upper handle portion and lower portion and forming cylinder, connected to lower portion. Device has piston assembly, mounted with possible axial displacement in said body and has a piston, mounted in cylinder with possible axial displacement from lower portion for sucking away liquid probe and to lower portion from outlet of liquid probe. Device has upper stop made with possible interaction to piston assembly and limiting upper position and stopping construction, fixedly placed in said body. Stopping construction contains first and second lower stops, made with possible interaction with said piston assembly, limiting its first and second separate lower positions and remote from each other in axial direction and along circle relatively to said axis. Device has return spring connected between body and piston assembly and loading said assembly upwardly into said upper position. Piston assembly contains working rod, passing in axial direction and meant for displacement of this assembly into one of said lower positions. Device has a portion for interaction with stops, passing in radial direction and mounted with possible rotation in first direction for interaction with first lower stop for limiting relatively shorter drive of piston assembly during sucking-in and in second direction for interaction with second lower stop for limiting relatively to longer drive of piston assembly during outlet of probe.
EFFECT: higher efficiency.
1 cl, 7 dwg
