NEEDLE-FREE MEDICAL CONNECTOR AND METHOD FOR REGULATING OF LIQUID FLOW Russian patent published in 2007 - IPC A61M39/26 

FIELD: medical equipment, in particular, technique for processing and introducing of parenteral liquids.

SUBSTANCE: needle-free connector has casing with first and second ports, and piston member delimiting liquid passage between first and second ports. Piston member is movable between liquid flow position and position free of liquid flow. Piston member comprises compressible section having variable inner width delimiting part of liquid flow path through connector. When piston is compressed to liquid flow position, compressible section is self-expanded in its width to thereby keep or increase volume of passage for flowing of liquid through connector. Compressible section is configured so as to provide continuous liquid flow through the entire length thereof.

EFFECT: provision for creating of valve mechanism without negative effect upon liquid flow rate.

22 cl, 18 dwg