Patent ID: 6863189

Claim:
A closing device adaptable to a glass or thermoplastic container comprising a neck closable by a stopper forced into the neck or screwed or clipped or crimped to the side wall of the neck while compressing a seal onto the upper end of the neck, the device comprising: a sleeve comprising an internal channel having an axis of symmetry that opens at one end having a leaktight connection of the closing device with respect to the neck of a container and at the other end having a sliding-contact surface which is a sector of a cylinder or a portion of a sphere, having an axis of symmetry of revolution that intersects the axis of symmetry of the internal channel of the sleeve at right angles, providing the bottle with a new orifice that can be closed by a shut-off plate connected to a caliper which pivots, via the ends of the caliper's two parallel arms, about two journals integral with the sleeve, on which the arms pivot by means of a bore, wherein the journals and the bores form cams that enable the pressure of the shut-off plate on the sliding-contact surface to be varied and the pressure of the sealing portion to be varied when the new orifice is closed using a control portion, and comprising a sealing portion having a seal with a flexible lip integral with the new orifice, shaped essentially as a frustum of a cone of revolution, while the shut-off plate comprises, in the area that covers the new orifice, a small spherical can with a diameter roughly the same as that of said orifice and with a radius of curvature of the spherical cap that is much greater.