Patent ID: 7464708

Claim:
An annular dose indicator for use with a dispenser comprising (a) a dispensing canister comprising a substantially cylindrical container having a closed end and an open end, said open end of the container being equipped with a dispensing means that comprises an outlet member, having an outlet, movable between closed and discharge positions and (b) an adaptor comprising a support block having a socket adapted to receive the outlet member, the container and support block being reciprocally movable relative to each other to cause the outlet member to move to its discharge position thereby dispensing a dose from the container, comprising an annular housing having an interior surface defining a substantially circumferential cavity; a counter-ring, said counter-ring located in the cavity and being arranged to be moveable relative to the housing by rotation about an axis substantially parallel to linear reciprocal movement of container and support block; a driving member mounted on the interior surface of the housing, said driving member engaging the counter-ring and being arranged to be selectively engaged during reciprocal movement of container and support block as to drive an incremental, rotational movement of the counter-ring; wherein said indicator is arranged to be slidably mountable about the dispensing canister and secured to an external surface of the dispensing canister, such that a first edge of the indicator faces towards the closed end of the container and a second edge of the indicator faces towards the outlet of the dispensing canister, so that at least the outlet member of the dispensing canister will extend beyond the second edge of the indicator.