Precipitation system for a powder inhaler

Details Precipitation system for a powder inhaler Precipitation system for a powder inhaler

1995-11-08

1999-09-07

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820321, A61M 1500, A61M 1506

Patent

active

059471174

ABSTRACT:
The precipitation system comprises a collection tube (1) which can be fitted onto the powder inhaler with a mouthpiece (3) and a centrifugal precipitator (2,6) arranged in the collection tube (1). This centrifugal precipitator has at least one spin-producing surface (2) which produces a spin flow in the collection tube (1), as a result of which the heavy coarse powder particles are precipitated on the inner wall of the collection tube (1) while the lighter fine powder particles pass into the mouthpiece (3) due to a flow which is essentially restricted to the area surrounding the tube axis.

REFERENCES:
patent: 2214032 (1940-09-01), Stewart
patent: 2653608 (1953-09-01), Miller et al.
patent: 2992645 (1961-07-01), Fowler
patent: 4206758 (1980-06-01), Hallworth et al.
patent: 4907583 (1990-03-01), Wetterlin et al.
patent: 5033463 (1991-07-01), Cocozza
patent: 5304125 (1994-04-01), Leith
patent: 5676130 (1997-10-01), Gupte et al.

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