Patent ID: 8875954

Claim:
Dispenser comprising: a hollow containment body able to be inserted in a bottle, a piston able to slide within said containment body between a raised position and a lowered position; a hollow stem able to slide within said containment body between a raised position and a lowered position to command the actuation of said piston; opening and closing means active between said stem and said piston in order selectively to place in fluid communication the cavity of said stem with the interior of the containment body; a retaining ring integral with said containment body and inserted within it, elastic means active between said retaining ring and said stem to contrast the free sliding of said stem and said piston within the containment body; a ball active on an orifice of the containment body positioned in a bottom portion of the containment body to allow a passage of fluid from a bottle to the containment body, said ball opening and closing said orifice to allow or to inhibit the passage of liquid from the bottle to the containment body; and an end stop structure that is integral with said containment body to define an end stop for arresting the sliding of the stem within the containment body, said end stop structure being active on a lower end surface of said stem for contacting said stem in the lowered position; said end stop structure comprising three end stop elements attached to a bottom wall of the containment body and mutually distanced by 120°, wherein each end stop element extends away from said bottom wall prevalently along a main direction parallel to an axis of symmetry of the containment body and comprises a shoulder to retain said ball in a bottom portion of the containment body between the three end stop elements, wherein the stem is configured in such a way that, in a configuration of abutment between said lower end surface of the stem and the end stop structure, a lower portion of the stem is partially inserted below an uppermost surface of the end stop structure and between the shoulders of the three stop elements so as to remove the ball from any blocking condition which may have occurred accidentally, said lower end surface of the stem and the lower portion of the stem being integrated in the same part of the stem.