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US 5,308,351 AGranted
Ear tag
AssigneeCaisley International GmbH
InventorReinhard Nehls
Life of this patent
Estimating the term…
Abstract
An ear tag having a first button with an aperture, and a pin having a head and a heel is attached to the first button via engagement of the heel in the aperture. A second button is provided having an aperture for engaging the head of the pin. At least one of the buttons has an additional frangible ring adjacent one of the apertures through which the pin is introduced and by which the pin engages the appropriate button. As force is applied to the buttons in opposite directions the additional ring breaks making the re-connection of the two buttons impossible.
Claims20
A frangible ear tag comprising:
- a first button having an aperture;
- a pin having a head and a heel and being attached to the first button via engagement of the heel in the aperture prior to application of the tag to an animal, and
- a second button which is separate from the pin prior to application of the tag, the second button having an aperture in which the head of the pin is engaged on application of the tag,
- at least one of the buttons having:
- an additional ring positioned in proximity to the at least one button's aperture and via which the pin engages said at least one button, wherein the additional ring comprises:
- a frangible annular element provided with means for engaging said at least one of the buttons, the frangible annular element dimensioned so that on application of excessive force to the buttons in opposite directions, the additional ring breaks, allowing the frangible annular element to disengage from said at least one button having the additional ring, so as to render subsequent re-connection of said at least one button to the pin impractical.
3 more elements
A frangible ear tag comprising:
- a first button having an aperture;
- a pin having a head and a heel and being attached to the first button via engagement of the heel in the aperture prior to application of the tag to an animal, and
- a second button which is separate from the pin prior to application of the tag, the second button having an aperture in which the head of the pin is engaged on application of the tag,
- at least one of the buttons having:
- an additional ring positioned in proximity to the at least one button's aperture and via which the pin engages said button, said additional ring fabricated from plastics material with a moulded-in spring steel washer having lugs extending radially inward for engagement behind the head of the pin on application of the tab, wherein the moulded-in spring steel washer functions as a separate annular element that engages said at least one of the buttons behind the head of the pin on application of the tag, the annular element dimensioned so that on application of excessive force to the buttons in opposite directions, the separable annular element disengages from said at least one button having the additional ring, so as to render subsequent re-connection of said at least one button having the additional ring to the pin impractical.
2 more elements
A frangible ear tag comprising:
- a first button having an aperture;
- a pin having a head and a heel and being attached to the first button via engagement of the heel in the aperture prior to application of the tag to an animal, and
- a second button which is separate from the pin prior to application of the tag, the second button having an aperture in which the head of the pin is engaged on application of the tag,
- at least one of the buttons having:
- an additional ring positioned in proximity to the at least one button's aperture and via which the pin engages said button,
- wherein the additional ring is fabricated from a non-corroding metal and is adapted for diametric expansion on fitting of the pin to said at least one button, wherein said additional ring on application of excessive force to the buttons in opposite directions, disengages from said at least one button having the additional ring, so as to render subsequent re-connection of said at least one button having the additional ring to the pin impractical.
3 more elements
Dependencies are inferred from the claim text.