| 主权项 |
1. A medicament delivery device comprising a metering member mounted for rotation adjacent a reservoir containing a bulk quantity of medicament, the metering member being adapted when at a filling position to volumetrically meter a desired dose of medicament from the reservoir and by rotation of the metering member in a first sense to transfer said dose to a dispensing position at which the dose can be dispensed from the device, the metering member and/or a component to which the metering member is operably linked being provided with formations effective to prevent rotation of the metering member from the filling position in the sense opposite to the first sense, the formations effective to prevent rotation of the metering member from the filling position in the sense opposite to the first sense constituting a ratchet-type mechanism, the metering member and/or the component to which the metering member is operably linked on the one hand and an adjacent surface of the device on the other hand being provided with ratchet and pawl formations, wherein the metering member and/or the component to which the metering member is operably linked is provided with one or more pawls that engage, when the metering member is in the filling position, with corresponding ratchet formations to prevent reverse rotation of the metering member. |
