STOPPER FOR VESSELS Russian patent published in 1995 - IPC

FIELD: packing. SUBSTANCE: stopper has chamber made of flexible material consisting of cylindrical and conical sections with bottoms, ring shoulder to rest on end face of vessel neck and hollow rod secured on bottom of conical section from inner side of chamber. Hollow rod has diaphragm chamber on its free end. Made in bottom of cylindrical section is hole to pass the rod. At least one flexible washer in form of torus is found on bottom of conical section. Washer should be preferably made of microporous rubber. Stopper should have nut to be fixed by means of circular slot on bottom of cylindrical section. Thread should be cut on rod to engage with thread of nut. Stopper can be used repeatedly. EFFECT: enhanced reliability of checking and preservation of contents of vessel. 3 cl, 5 dwg