Patent ID: 6666170
Filing Date: 2003-12-23
Classification: A01K

Abstract:
An animal tamperproof ear tag including a female opening through which a head of a stem of a coupling member can pass to effect a coupling action when installing the tag on an animal, the female opening being formed as part of a separate enclosed boss of rigid hard moulded material with a thick wail section, the boss being made by a top section and a base section each having a flange extending peripherally from an external surface thereof, said top section having an open end which provides a shoulder, a peripheral wall of the base section engages in the open end in a snug fit with the end of the peripheral wall butted up to said shoulder, the peripheral flanges being mated face to face, said flanges being moulded into the resilient material forming a part of the ear tag so as to anchor said boss to the tag part, wherein the female opening is in the base section, the female opening being of decreasing cross-sectional area from an external part of the boss as it extends into an internal cavity of the boss in which the head can reside after passing through the female opening, said female opening being at least part formed by a plurality of projections which extend inwardly from the exterior of the boss and form at the distal ends thereof a retention surface which, in use, engages with the end of the stem of said coupling member after the head has passed through the female opening, and wherein the internal cavity being in close conformity with the head of the stem.