Push-nipple for medical sprayer

Claim 1

An elongate push-element, for spraying a liquid, in combination with a container (1) for holding a liquid, said container having a valve stem (4), said push-element fitting over said valve stem (4), said push-element comprising: a one-piece molded elongate external member (20) having a central channel (21) extending vertically axially within said external member, said central channel having one end (21a) which is open, said external member further including a wall (21b) integrally formed as a part of said external member and inseparable from said external member, wherein said wall substantially closes a second, opposite end of said central channel, said wall having an opening (12) extending therethrough to form an inner periphery of the wall which surrounds said opening, said opening having a diameter smaller than that of said central channel and through which liquid is expelled, said wall further having at least one groove (23) formed therein, said at least one groove extending non-radially outwardly from the opening, wherein a swirling motion is imported to the liquid as it is expelled; and an internal member (10) comprising a rod having a cross-section of smaller area than said central channel and larger area than said opening and having an end section (26) substantially perpendicular to a longitudinal axis of said rod, said internal member being separate from said external member, said container (1) and said valve stem (4) and inserted into said central channel through said one end, wherein at least a passage (25) is formed.