Patent ID: 6116465
Filing Date: 2000-09-12
Classification: B65D

Abstract:
A stopper for a container having a neck, comprising a body (1) fixed and sealed to the neck (2a) of said container (2) and wherein at least a duct is formed for emptying the container, and a shutoff valve for closing said duct, the body (1) of the stopper including a cylindrical part (1a) for engaging into the neck (2a) of the container (2), the duct comprising a first channel (4) and a second channel (5) which are separated from each other, and extend into the cylindrical part (1a) of the body and emerge, at one of their ends, in the peripheral surface of the cylindrical part (1a) of the body (1) through first and second orifices (4a and 5a), respectively, spaced from one another in the circumferential direction of the cylindrical part (1a) of the body (1), the first channel (4) emerging, at its other end, through a third orifice (4b) located in a first end surface (1c) of body (1) which, in use, is located inside said container (2), the second channel (5) emerging, at its other end, through a fourth orifice (5b) located in a second end surface of the body (1) which, in use, is located outside the container (2), wherein the shut-off valve is formed by a diaphragm (6) of elastomeric material, which tightly encircles the cylindrical part (1a) of body (1) by covering the first and second orifices (4a and 5a) of both said first and second channels (4 and 5) and which, through its elastic distortion, allows a fluid substance to flow both from inside to outside of the container and from outside to inside of said container, the cylindrical part (1a) of the body (1) of the stopper, covered with the diaphragm (6), has a selected external diameter for ensuring, in use, a close fitting of body (1) into the neck (2a) of container (2) and has in its cylindrical surface a groove (3) which extends circumferentially on at least a portion of the circumference of said cylindrical part (1a), and that the diaphragm (6) closely matches the shape of the surface of the groove (3) and said first and second orifices (4a and 5a) of both channels (4 and 5) are located in the groove (3).