| 摘要 |
A pressurised metered dose inhaler comprising: ```a reservoir 2 for containing pressurised product, a valve 9 having an inlet 11 communicating with the reservoir 2 and an outlet 14 through which product is dispensed in use, ```a piece of magnetisable material 5, ```an armature 8 extending into proximity with the valve 9 and ```an electromagnet 7 surrounding at least a portion of the armature 8. Wherein the armature 8 is coupled to, or forms part of, the valve 9 such that controlled energisation of the electromagnet 7 causes the armature 8 to be either attracted to or repelled from the piece of magnetisable material 5 one or more times to operate the valve 9 for a controlled time period to effect dispensation of a metered dose of pressurised product from the reservoir 2 through the valve outlet 14. |
