Dual valve for respiratory device

Details Dual valve for respiratory device Dual valve for respiratory device

1979-07-30

1981-04-07

Recla, Henry J.

Surgery

Liquid medicament atomizer or sprayer

12820018, 12820524, 12820716, 128725, 137102, 13751215, 1375124, A61M 1600

Patent

active

042599512

ABSTRACT:
A dual valve for an inhalation device which permits air to be withdrawn from the device upon inhalation but which prevents the flow of air into the device upon exhalation. The valve includes a central opening in communication with the device, and a plurality of openings about the central opening in communication with the surrounding environment. The valve also includes a central flexible flapper valve which extends across and controls the flow of air through the central opening, and a plurality of outer flexible flapper valves which extend across and control the flow of air through the outer openings.
In use, inhalation by a user opens the central flexible flapper valve to allow the free flow of air from the inhalation device while the outer flapper valves remain closed. Correspondingly, exhalation by the user opens the outer flexible flapper valves from their seats to exhaust air to the surrounding atmosphere while the central flexible valve remains closed.

REFERENCES:
patent: 2669979 (1954-02-01), Kiekhaefer
patent: 3519012 (1970-07-01), Van Patten
patent: 3527242 (1970-09-01), Ansite
patent: 4182347 (1980-01-01), Russo

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