Multi-dose insufflator for medicaments in powder form

A multi-dose insufflator (10) for the nasal administration of medicaments in powder form, comprising a reservoir unit (34) for the medicament in powder form, a unit (60, 64) for withdrawing and metering the medicament contained in the reservoir unit, and an insufflation unit (42, 26) comprising a manually operated pump (42) for generating an air stream within a channel (26) for conveying an individual dose of medicament into the nasal cavity of the patient;

• the withdrawal and metering unit (60, 64) comprising a conveyor device (60) provided with at least one cup (64) for withdrawing a dose of powder medicament from the reservoir and conveying it into an insufflation position;
• the cup having a base hole (66) coaxial with the cup itself, and through which the air stream generated by the pump (42) passes when the cup (64) is in the insufflation position;
• the base hole (66) in the cup (64) having a size substantially smaller than that of the mouth of the cup (64) and such as to prevent the powder medicament falling through said base hole (66), by virtue of the "arching" effect.