Patent ID: 7895776

Claim:
An ear tag for the identification and the tagging of animals: wherein this tag primarily combines a receiving button ( 1 ) by irreversible interlocking of a pin ( 2 ); wherein this button ( 1 ) comprises a rigid head ( 13 ) inside of which is located a cavity ( 8 ) for axial accommodation of a punch ( 3 ) of the pin ( 2 ), the head ( 13 ) being formed of a hard first material; wherein this head ( 13 ) is secured to a holding shell ( 5 ) only via a connecting shell ( 14 ) that is secured to both the holding shell ( 5 ) and the head ( 13 ) for holding the punch ( 3 ), which is equipped with an opening ( 6 ) for inserting the punch ( 3 ) inside the button ( 1 ) toward the cavity ( 8 ), and a shoulder ( 10 ) for holding the punch ( 3 ) against the withdrawal of the punch ( 3 ) outside of the button ( 1 ), by stopping a shoulder ( 9 ) that the punch ( 3 ) comprises against the holding shoulder ( 10 ), the holding shell ( 5 ) being made of a flexible second material, the first material and the second material being formed from different materials, the first material being harder than the second material relative to each other; wherein an axial wall ( 7 ), of the holding shell ( 5 ) that delimits said opening ( 6 ) is formed of an elastic material and is radially deformable to allow passage of the punch ( 3 ) through the opening ( 6 ); and wherein at least one chamber ( 11 ) is located between the head ( 13 ) and said axial wall ( 7 ) for the accommodation of the axial wall ( 7 ) that is deformed under the action of the passage of the punch ( 3 ) through said opening ( 6 ).