| 摘要 |
An inhaler comprises a breath operated valve with a valve element 9 biased closed by a spring 22. A diaphragm 11 is arranged to deform when suction is applied to an outlet end 2, to lift the valve element 9 against the biasing force of the spring 22 allowing composition to flow from a reservoir 4 along the tube 8 and out of the inhaler at outlet 12. The spring 22 is a strip of resilient material forming a U-shape (see figure 2), with a first arm 23 extending from a position adjacent to the valve element along the diaphragm 11 in a direction away from the outlet end to an apex 24, with a second arm 25 extending back towards the outlet end 2. The spring 22 may have a projecting element 21 which fits into a recess 20 in the diaphragm, thus forming the valve. |
