An inhaler for delivering medicament by inhalation, comprising a housing
for holding a canister of medicament having a body and a valve stem
compressible together to actuate the canister to deliver a dose of
medicament from the valve stem, an actuation mechanism for compressing the
canister, a cannister re-set mechanism comprising a locking element for
locking the canister in a compressed state and a release member
resiliently biassed by the actuation mechanism on compression of the
canister to release the locking mechanism to allow reset of the canister.
By provision of the locking element for locking the canister in a
compressed state, it is possible to ensure re-set does not occur
immediately. The release member subsequently releases the locking
mechanism to allow re-set of the canister after a proper dose has been
delivered. The cannister reset mechanism further comprises a damping
element for damping movement of the release member to delay the action of
the resilient biassing to release the locking element a predetermined
period of time after actuation of the canister.
