Patent ID: 7967010
Filing Date: 2011-06-28
Classification: A61M,B05B

Abstract:
1. A spray or injection device for spraying or injecting a product of interest, in liquid form, the device being configured to deliver at least a first and a second preset dose of the product in succession, the device extending along a reference axis from a distal end to a proximal end, the device comprising: an axially elongate container containing the product; a plunger disposed in and blocking off the container, the plunger being axially moveable with respect to the container, in a reference direction, and allowing the product to be propelled distally from the container; a casing configured to accommodate and axially secure the container, the casing having a stop surface; and a pusher assembled with the casing such that the pusher and casing are moveable with respect to each other, the pusher configured to move the plunger within the container in the reference direction and having a stop surface which engages the stop surface of the casing to form a stop enclosed by the casing when the plunger is advanced a certain distance in the container, the stop defining a length of travel of the pusher with respect to the casing so as to divide the length of travel of the pusher into a first travel portion corresponding to the delivery of the first preset dose, and a second travel portion corresponding to the delivery of the second preset dose; wherein the stop surface of the pusher and the stop surface of the casing are configured to allow disengagement therebetween when a force applied to the pusher in the reference direction is reduced and, without any rotational movement of the pusher or casing, the pusher can then be advanced along the second travel portion for delivery of the second preset dose.