UNIT OF VESSEL COVER WITH INTERNAL THREAD OF NECK Russian patent published in 2009 - IPC B65D39/08 

FIELD: personal demand items.

SUBSTANCE: unit of vessel neck and cover, in which vessel neck has the first helical thread on its internal surface, and cover comprises cylindrical plug for insertion into vessel neck. On external surface of plug there is the second helical thread for interaction with the first helical thread. Cover is arranged with the possibility of fixation and repeated fixation on neck per single smooth turn by 360° or less. The first helical thread is arranged as a whole with neck by moulding of thermoplastic material and comprises at least four segments of the first thread, which are not covered along circumference around vessel neck. The second helical thread comprises multiple segments of the second thread, length of which exceeds length of the first thread segments and which substantially create continuous trajectory of helical thread, along which segments of the first thread are moved from substantially fully opened position into substantially fully closed position of cover on vessel neck. The first and second threads are multiple threads, having number of starts equal to number of segments of the first thread.

EFFECT: invention is aimed at creation of new structure of vessel cover unit, which is convenient in use for elderly people and children and prevents uncontrolled exhaust of gas in the beginning of cover unscrewing from vessel neck.

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