EP0412524A1 — Disposable nozzle adapter for intranasal spray containers

USPTO Abstract

A disposable nozzle adapter (10) for intranasal admin­istration of a viscous medical solution (3) in combination with a spray container (1), which comprises a cylindrical body (11), a rod (20) arranged in the body, and a nozzle tip (30). The body has a cylindrical chamber (15) and a central bore (18) communicated with the chamber through a channel (19) for attachment of the spray container. The rod is provided on its one end at the least with a small-sized (22a, 22b) portion and middle-sized (23a, 23b) portion. The nozzle tip has a top wall (30a) and a cylindrical portion (30b) extend­ing therefrom, the top wall being provided with a central spray opening including a tapered recess (31b), and swirl grooves (32) extending outwardly from the tapered recess to the inner surface of the cylindrical portion. The swirl grooves have a cross-sectional area increasing outwardly and its cross-­sectional area is 0.03 to 0.08 mm² at the minimum. The nozzle tip is fitted in the opening of the chamber of the body and engaged with the middle-sized portion of the rod to form an annular channel surrounding the small-sized portion of the rod and being communicated with the grooves.