| 摘要 |
The sprayer device utilizes a friction held piston that fires automatically upon full depression of the firing cap. The drive spring does not release to fire the piston until after the spring is fully compressed because the force required to overcome the frictional force between said high friction engaging surface of the piston and the piston shaft is greater than the force required to compress said spring. A user may procure a monodose of medicine by (i) unlocking a child resistant locking mechanism; (ii) applying compressive force against the firing cap so as to first compress the spring and then to push the piston out of an piston engaging friction area such that the spring causes the distal end of the piston to break the medicine container to drive medicine through the spray nozzle in a manner that is user independent as to dosage amount and dosage speed of delivery. The device includes a child resistant outer locking mechanism being a tear away system including a connection means for connecting the firing cap to the central member. The device further includes a plurality of different length stops for metering the amount of medicine dispensed wherein there is a gauge on the device for selecting the desired medicine amount associated with the stop. There is disclosed a two cap plug cap on the proximal and distal ends of the medicine package which act as pistons. There is also a piercer attached to a proximal end of the monodose medicine package wherein when said piston is fired the piercer moves upwardly through the monodose medicine package to pierce the monodose medicine package and to drive medicine therefrom to and through said spray nozzle. |
