Inhalation actuated dispensing apparatus

Details Inhalation actuated dispensing apparatus Inhalation actuated dispensing apparatus

1990-12-13

1993-06-08

Burr, Edgar S.

Surgery

Liquid medicament atomizer or sprayer

Pre-pressurized container holding medicament

12820014, A61M 1100

Patent

active

052170047

ABSTRACT:
Movement of the cover relative to the housing spring loads and latches a piston carrier in the armed position. Inhalation causes a passageway door to open, releasing the carrier latch to permit the carrier to be moved toward the canister by the spring. The piston moves with the carrier, due to a fluid connection therebetween, applying a compression force on the spring loaded canister valve stem and causing it to dispense the inhalant through an opening in the piston which functions as a nozzle. After the inhalant is dispensed, the carrier fluid vents permitting the spring of the canister valve stem to move the piston relative to the carrier, and thus release the force applied to the valve stem by the piston. The sensitivity of the toggle linkage between the door and the carrier latch is adjustable. The linkage can be manually tripped for testing purposes.

REFERENCES:
patent: 3187748 (1965-06-01), Mitchell
patent: 3456644 (1969-07-01), Thiel
patent: 3565070 (1971-02-01), Hanson
patent: 3598294 (1971-08-01), Hedrick
patent: 3605738 (1971-09-01), Ciranna
patent: 3636949 (1972-01-01), Kropp
patent: 3732864 (1973-05-01), Thompson
patent: 3789843 (1974-02-01), Armstrong
patent: 3814297 (1974-06-01), Warren
patent: 4414972 (1983-11-01), Young et al.
patent: 4648393 (1987-03-01), Landis
patent: 4664107 (1987-05-01), Wass
patent: 4955371 (1990-09-01), Zamba et al.

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