| 摘要 |
The invention provides a metering device for use in transferring a desired volumetric dose of a flowable substance (132) from a storage chamber (133) containing t he substance (132) to a location outside the chamber (133), via an outlet conduit (135) communicating between the chamber (133) and the location (129) to which the dose is to be transferred, the device being of such dimensions as to be able to pass through the outlet conduit (135) and having first and second end elements which, when the metering device is located inside the conduit (135) in use, are in sealing engagement with the inner walls of the conduit (135), the sha pe of the metering device between the first and second end elements being such that a space of the desired dose volume is defined between the first and second end elements and the intervening section of the inner walls of the conduit (135), in which space substance (132) from the storage chamber (133) may be enclosed. The device is of particular use in a dry power inhaler, and an inhaler incorporating the device also falls within the scope of the invention.< /SDOAB> |
