SEAL Russian patent published in 1997 - IPC

FIELD: vessel seal based on use of contents pressure. SUBSTANCE: disk part of seal has preferably rigid central part and annular articulated part 5 associated with the rigid central part. The articulated part is adopted to be turned outside the vessel and connects rib part with central part. When inner pressure in vessel grows, central part through articulated part pushes rib part mainly in radial direction outside to neck of vessel. EFFECT: improved reliability of vessel sealing. 10 cl, 14 dwg