ONE-WAY VALVE DEVICE Russian patent published in 2008 - IPC B65D47/24 B65D47/20 B65D47/04 

FIELD: packing means, particularly reusable valves adapted for repeated fluid distribution from collapsible vessels protected against contamination.

SUBSTANCE: valve comprises rigid plastic valve seat 1 located in vessel neck and provided with through orifices 8. Valve seat 1 has extension 11 passing in axial vessel neck direction towards outlet orifice 16. The extension 11 may be shaped as pin. Elastic seal 2 retained on valve seat with annular section is located over valve seat. The elastic seal has sleeve-like portion surrounding valve seat extension except end section 20 adjoining extension 11 end and spaced apart therefrom in radial direction. As pressure is applied to vessel content sleeve-like part of elastic seal 2 is displaced in axial direction relatively extension 11 to provide fluid distribution from vessel.

EFFECT: improved sterility of residual material in vessel and prevention of fluid leakage therefrom.

24 cl, 2 dwg