Loose powder inhaler with inhalation-actuated dosing piston

Details Loose powder inhaler with inhalation-actuated dosing piston Loose powder inhaler with inhalation-actuated dosing piston

1992-06-01

1993-08-31

Burr, Edgar S.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820313, A61M 1500, A61M 1600, B05D 714, B65D 8306

Patent

active

052399923

ABSTRACT:
An inhaler for powder products comprising a housing having an oral suction mouthpiece, a piston contained within the housing for movement in opposite directions, and an elastic member for urging the piston in one direction. The mouthpiece connects with a chamber in which the piston is located so that inhaling through the mouthpiece draws the piston toward the user's mouth. The piston includes a charging cavity for holding a charge of powder product. The cavity communicates with the internal volume of the mouthpiece as the piston is drawn toward the user's mouth whereby the charge is dispensed and inhaled by the user.

REFERENCES:
patent: 2587215 (1952-02-01), Priestly
patent: 3257961 (1966-06-01), Schlenker
patent: 4446862 (1984-05-01), Baum et al.
patent: 4524769 (1985-06-01), Wetterlin
patent: 5113855 (1992-05-01), Newhouse
patent: 5161524 (1992-11-01), Evans
patent: 5176132 (1993-01-01), Drought et al.

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