Valve for delivering a liquid from an aerosol container

Claim 1

A valve for delivering a liquid from an aerosol container, comprising a rigid body member seamed to a bottom attachable on a container mouth or inlet and having side and bottom walls defining a cavity, a first shutter which is accommodated and movable within the cavity of said rigid body member, a tubular element having one end projecting from the bottom on the opposite side to that frOm which said body member projects and its other end fast with said first shutter, a resilient sealing member clamped between the rigid body member and the bottom and having a hole, in which said tubular element is forced and can move and swing, at least one passage between the inside of the tubular element and the cavity of the rigid body member adjacent to said first shutter, at least one free hole in said side wall of the rigid body member, at least one spring acting on the first shutter by pressing it against said sealing member to close said passage, a hole being provided in the bottom wall of the rigid body member, at which hole a hollow extension projects from the rigid body member, on which extension the inlet of a deformable bag can be superimposed, this bag containing said liquid and capable of being accommodated within said container, said valve being characterized in that an annular resilient strip can be superimposed to the outer surface of the side wall of said rigid body member, this strip being forced on the side wall, superimposed to and sealing the hole in said wall, and in that at the bottom of said first shutter means are provided for closing the hole in said bottom wall of the rigid body member under the conditions where said tubular element and first shutter are displaced against the action of said spring to press on said bottom wall; and, wherein said means provided at the lower end of the first shutter for closing the hole in the bottom wall of the rigid body member comprise a second shutter, between which and the first shutter said spring is located, in one of said two shutters a recess being formed, a finger projecting from the other of said two shutters, said finger extending within said recess and having slightly higher transverse dimensions than those of said finger, the free end of the finger being spaced apart from the opposing surface of the recess under valve rest conditions and contacting said recess surface, holding said second shutter pressed on the rigid body member to close the hole in its bottom wall, under the conditions where said tubular element is urged to said bottom wall against the action of said spring.