abstract |
The controlled dose delivery device comprises an elongated hollow body (2) suitable for internally housing a refill of a fluid product, actuated by pushing, a pusher slidably mounted in the body (2), on the upstream side of the refill, with a push rod (40), means (23,29) for limiting the excursion permitted to the pusher (4) towards the refill, and a non-return means (55) of the pusher. The push rod (40) is of cylindrical or prismatic shape, and the non-return means comprises at least one semi-rigid fin inclined on the axis (55) cooperating at bracing with the lateral surface of said push rod (40). |