Syringe with two part mastitis cannula cap

Claim 1

In combination with a mastitis infusion syringe having a blunt-tipped cannula sized in diameter and length to fit the teat canal portion of a teat of a dairy vow, a two part mastitis cannula cap for facilitating controllable length insertion of the mastitis infusion syringe into the teat canal portion of a teat of a dairy cow said cap comprising: a hollow inner cap including a rear end having means to removably attach said inner cap to the syringe over the cannula and a forward end portion of which has a diameter size to prevent insertion of said inner cap into a teat canal, said forward end having an aperture dimensioned to receive the cannula in sealing engagement therein, means defining an extension of the cannula forward of said forward end, the length of said extension being substantially less than the full length of the cannula, whereby it is less than the length of a teat canal, and means defining a distal end surface closely surrounding said extension for engaging said teat upon insertion of the extension; an outer cap for covering the cannula extension removably secured in covering relationship with respect to said extension; and whereby either the outer cap alone can be removed to expose the extension of the cannula for insertion into a teat canal for a distance less than full cannula length, or the outer and inner caps can be removed to expose the cannula for full insertion.