Inhaler with regular complete emptying of the capsule

Claim 1

An inhaler for administering medicaments in finely divided form contained in capsules, comprising: a body enclosing a nebulization chamber, said nebulization chamber having a circular cross-section and being sufficiently large to enable the capsule to move during inhalation, said nebulization chamber further including: (i) a plurality of air discharge apertures disposed at one end of said chamber whereby the air laden with said finely divided medicament may be drawn out of said chamber; and (ii) a plurality of air inlet apertures provided near the end of the chamber opposite to said air discharge apertures, said inlet apertures allowing said chamber to communicate with the outside and said air inlet apertures being formed in such a manner as to generate within the chamber during inhalation a swirling air flow which passes through said air discharge apertures; and (b) a piercing device which is movable within said body for the purpose of piercing the capsule at one end; wherein the end surface of said nebulization chamber near said air discharge apertures is shaped such that when the capsule rests on said end surface during inhalation, said capsule does not substantially prevent air passage through any of the air discharge apertures, said nebulization chamber being tapered towards the end surface of said chamber which includes said air discharge apertures.