Abstract: The equipment is installed directly upstream of the delivery outlet; said outlet can be removable and can be reconnectable after sterilization treatment or can be constituted by a disposable nozzle.

Abstract: A needle has an external cannula (1) and a closing stem (3). The cannula (1) has one portion of relatively small thickness (s) and one portion, set at the mouth (1B) of the needle, of a larger thickness (s1), the two portions of different thickness being separated by an internal edge (1D) developed according to plane (W) inclined with respect to the axis (X—X) of the cannula. Inserted between the cannula (1) and the stem (3) is a tubular element (5), which can slide axially and which can be controlled independently, the tubular element (5) having one end provided with a tabe-like extension (5C) designed to engage with the inclined edge (1D) so as to undergo deflection in order to close the mouth of the cannula (1).

Abstract: The needle comprises an external cannula (1) and a closing stem (3). The cannula (1) has one portion of relatively small thickness (s) and one portion, set at the mouth (1B) of the needle, of a larger thickness (s1), the two portions of different thickness being separated by an internal edge (1D) developed according to a plane (W) inclined with respect to the axis (X-X) of the cannula. Instead between the cannula (1) and the stem (3) is a tubular element (5), which can slide axially and which can be controlled independently, the said tubular element (5) having one end provided with a tab-like extension (5C) designed to engage with said inclined edge (1D) so as to undergo deflection in order to close the mouth of the cannula (1).