Patent ID: 7318685

Claim:
A tension decoupler device connecting two parts of a structure and fitted with rupture members, the rupture of which causes decoupling of said parts when they break, the device comprising: a first tension transmitting element connected to a first part of said structure, said first tension transmitting element configured to apply a tension load to said first part of said tension decoupler device; a second tension transmitting element connected to a second part of said structure, said second tension transmitting element configured to apply the tension load to said second part of said tension decoupler device; a set of first rupture members arranged to be parallel to each other, each of the first rupture members including a zone of weakness configured to initiate a tensile rupture; and a set of second rupture members, arranged to be parallel to each other and parallel to the first rupture members, wherein each first rupture member is designed to break at a predetermined individual member tension load value, each second rupture member is designed to break only at individual member tension load values which are higher than said predetermined individual member tension load value, said second rupture members are designed to resist fatigue as long as the tension load does not reach said predetermined load value, and said first and second parts of said tension decoupler device are coupled together by said set of first rupture members and said set of second rupture members.