Patent ID: 8082919

Claim:
A dose counter device adapted for mounting on a distal end of an inhaler that includes an arrangement of at least a canister in an inhaler housing, a distal end of the canister protruding a distance from a distal end of the inhaler housing, the dose counter device comprising: means for registering a delivered dose, wherein the inhaler housing and the distal end of the canister interact with the registering means; and means for compensating for height dimension variations of the canister, of the registering means, and of the arrangement, wherein the compensating means is arranged to interact with the registering means, whereby erroneous counting of a delivered dose from the canister caused by height dimension variations of the canister, of the registering means, and of the arrangement is avoided; wherein the compensating means is adapted to be tightly mounted and not removably fitted over the distal end of the inhaler housing so that a distance between the distal end of the compensating means and the distal end of the canister is a determined distance, whereby a distance that the canister has to be displaced within the inhaler before a delivered dose is registered is accurately determined.