Patent ID: 7552844

Claim:
A coupling arrangement for coupling a withdrawal arrangement ( 4 ) to a package ( 1 ) with liquid or essentially liquid contents ( 3 ), the withdrawal arrangement ( 4 ) is for withdrawing the contents ( 3 ) from the package ( 1 ), wherein: at least significant parts of the package ( 1 ) consist of synthetic material, the package ( 1 ) comprising a plurality of walls, the coupling arrangement ( 5 ) comprises an inner coupling device ( 9 ) that is arranged within the package ( 1 ), the inner coupling device ( 9 ) comprising a part ( 10 ) that is provided with a plurality of surrounding frangibly connected holes, the inner coupling device ( 9 ) is arranged on an inner surface of an unbroken part ( 11 ) of one of the walls the walls ( 2 ) of the package ( 1 ), the coupling arrangement ( 5 ) comprises an outer coupling device ( 12 ) that is arranged on the withdrawal arrangement ( 4 ), and the outer coupling device ( 12 ) comprises a tube section ( 14 ) that breaks the unbroken part ( 11 ) of the wall of the package ( 1 ) and that is introduced into a central aperture ( 15 ) in the part ( 10 ) of the inner coupling device ( 9 ) that is provided with said plurality of surrounding frangibly connected holes in order to be coupled to the part ( 10 ) such that the contents ( 3 ) in the package ( 1 ) can be withdrawn through the tube section ( 14 ), at least one protruding part ( 16 ) is arranged on the withdrawal arrangement ( 4 ) either on or beside, or both, the tube section ( 14 ) of the outer coupling device ( 12 ), at least one of said plurality of surrounding frangibly connected holes ( 17 ) or a frangible section ( 18 ) of a wall of the part ( 10 ) or both is arranged in the part ( 10 ) of the inner coupling device ( 9 ), the protruding part ( 16 ) can be either introduced into the at least one of said plurality of surrounding frangibly connected holes ( 17 ) or caused to break the frangible section ( 18 ) of the wall, or both, in order to allow coupling of the outer coupling device ( 12 ) and the inner coupling device ( 9 ), and the protruding part ( 16 ) interacts with the part ( 10 ) that is provided with the plurality of surrounding frangibly connected holes to prevent coupling of the inner coupling device ( 9 ) and the outer coupling device ( 12 ) if the part ( 10 ) that is provided with the plurality of surrounding frangibly connected holes lacks the said plurality of surrounding frangibly connected holes ( 17 ) and said frangible section ( 18 ) of the wall for the protruding part ( 16 ).