DEVICE FOR SEALING RESERVOIRS Russian patent published in 1995 - IPC

FIELD: sealing devices. SUBSTANCE: device has hermetically sealed chamber made from a flexible material having two sections, the first of which is engageable with the vessel walls, and the second one is made in the form of normally compressed bellows and a mechanism for deforming the second section. The first section pressure decreases and its diameter becomes smaller on extending the bellows. In this state the sealing device is introduced into the vessel neck. Then the bellows is compressed and the first section is closely pressed against the vessel walls. EFFECT: provided reliable sealing of vessels with various neck diameters. 1 dwg