Patent ID: 8528758

Claim:
A closure element ( 1 ) of a bag-type container from foil-type material, the closure element having a base ( 5 ) which comprises a spout ( 12 ) which defines a passage ( 13 ) and a lid member ( 3 ) mounted to the base ( 5 ) to clear and close the passage ( 13 ), wherein said lid member ( 3 ) comprises a cylindrical protective element ( 43 ), wherein said cylindrical protective element ( 43 ) has a larger diameter than said spout ( 12 ), and wherein the closure element ( 1 ) has a transport state in which the lid member ( 3 ) is attached to the base ( 5 ) via at least one predetermined breaking point ( 61 ), and an installation state in which, after separation of the predetermined breaking point attachment, the lid member ( 3 ) can rotate relative to the base ( 5 ) from an open position to a locked position in which the lid member ( 3 ) is removably held at the base ( 5 ) by a detent mechanism, wherein said detent mechanism is formed by at least two pairs of hooks ( 23 , 73 ), wherein a first hook of each pair is fixed at the base ( 5 ) and a second hook of each pair is fixed at said cylindrical protective element ( 43 ) to engage with each other in a detent manner in the locked position.