An inhalation counter (350, 450, 550) for an inhalation system (100) is provided. The inhalation system comprises a fluid flow passage (322) and the inhalation counter comprises an escapement wheel (352, 452), a biasing means (354, 454) for incrementing the escapement wheel, a conversion mechanism which, in use, is configured to perform a first action in response to a temporary increase in fluid flow rate through the fluid flow passage, and an anchor (356, 456). The anchor is coupled to the conversion mechanism and configured to interact with the escapement wheel so as to allow the biasing means to increment the escapement wheel in response to the first action of the conversion mechanism. A holder (300) and an inhalation system comprising the inhalation counter are also provided.

A counter containing a first ring member having first indicia and a second ring member having second indicia, each of the first and second ring members being rotatable in increments about a common axis, one or both of the first and second indicia indicating a count; and a drive mechanism for rotating the first ring member and for rotating the second ring member after one or more predetermined degrees of rotation of the first ring member, wherein the drive mechanism contains a pawl-and-teeth mechanism which contains a first and second pawl engageable with a plurality of teeth, and wherein each of the first and second pawls contains a driving engagement face for engaging in a driving engagement with one of the plurality of teeth, and a sliding engagement face for sliding over one of the plurality of teeth.

An indicating device for a dispenser that dispenses metered dosages of a medicament from a container having a valve moveable between a closed position and an open position. The indicating device includes an indicator housing having a first cover with a first vertical wall and a second cover with a second vertical wall. One of the first or second covers includes a base defining a lower surface of the indicator housing, and the other of the first or second covers includes a top defining an upper surface of the indicator housing. The first and second covers are joined with the first and second vertical walls and the base and the top defining an interior space therebetween. An indicator is rotatably disposed in the interior space of the indicator housing, with the indicator including dosage indicia. A dispensing device includes a dispenser housing and an indicating device.

The present disclosure relates to a dose indicator comprising, a chassis comprising a chassis frame and a displacement portion comprising a drive part to engage an indexable first display unit indexable about a first display axis, the indexable first display unit comprising a drive tooth to drive an indexable second display unit indexable about a second display axis, the second display axis being non-coaxial with the first display axis, the indexable second display unit comprising two or more second display unit indexing teeth, wherein the drive tooth and each of the second display unit indexing teeth comprise lips on their respective engagement surfaces, the drive tooth lip and second display unit indexing tooth lip each being adapted to engage at an engagement angle that produces a resultant force acting to pull the first display unit and second display unit together. The present disclosure further relates to an actuator for an inhaler, wherein the actuator comprises a dose indicator as described above. The present disclosure is also directed to an inhaler comprising such actuator.