Powder inhaler having dispersing, discharge, and dwell-time cham

Details Powder inhaler having dispersing, discharge, and dwell-time cham Powder inhaler having dispersing, discharge, and dwell-time cham

1993-11-17

1995-07-25

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820312, A61M 1500, A61M 1610, B05D 714, B65D 8306

Patent

active

054353017

ABSTRACT:
The powder inhaler is based on a supply container (3) for the drug, which supply container is partially or completely closed off at its lower end by a rotatable or displaceable, manually actuated metering plate (4) for the repeated reception and delivery of a predetermined, reproducible quantity of the drug from the container (3), and of a mouthpiece (14) for inhaling, upstream of which a dispersing chamber (12) is connected. The metering plate (4) is provided with at least one depression (5) which is filled with the drug on actuation of the inhaler. Seen in the flow direction, an acceleration channel is arranged ahead of the dispersing chamber (12), which acceleration channel (8) partially covers the metering plate (4) with part of its longitudinal surface and opens out tangentially into a cylindrical dwell-time chamber (9). The dwell-time chamber (9) is, in turn, connected via a central outlet (10) of smaller diameter than the cylindrical dwell-time chamber (9) to a circular discharge chamber (11 ) which the dispersing chamber ( 12) adjoins tangentially.

REFERENCES:
patent: 3948264 (1976-04-01), Wilke et al.
patent: 4064878 (1977-12-01), Lundquist
patent: 4200099 (1980-04-01), Guenzel et al.
patent: 4570630 (1986-02-01), Elliott et al.
patent: 4668218 (1987-05-01), Virtanen
patent: 4889114 (1989-12-01), Kladders
patent: 5113855 (1992-05-01), Newhouse

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