Device for packaging and dispensing a product in an airless manner, notably in several phases, associated purge ring and method

A purge ring intended to be inserted into a device for packaging and dispensing a product, the purge ring comprising;

• a base delimiting a central passage orifice for the product, the central passage orifice comprising a first end in which the suction conduit of the pump opens out and a second end opposite the first end, the central passage orifice defining a central axis of the ring extending between the first end and the second end;
• the base having an outer contour and a side surface extending between the outer contour and the central passage orifice, the side surface converging from the outer contour toward the second end of the central passage orifice;
• the outer contour of the ring being intended to come into tight contact with the inner surface of the container;
• wherein the purge ring further comprises at least one radial opening arranged radially relative to the central axis, the at least one radial opening emerging in the central passage orifice and allowing the passage of the product from the container toward the central passage orifice,
• wherein the at least one radial opening is formed by a deflector forming a deflection cap mounted on the second end of the central passage orifice, extending across from the side surface of the base and covering at least part of the side surface of the base, the side surface and the cap forming at least one flow channel for the product between them connecting the at least one radial opening to the central passage orifice,
• wherein the at least one flow channel between the at least one radial opening and the central passage orifice extends in a direction towards the bottom of the container,
• wherein along a plane disposed generally orthogonal to the central axis and intersecting circumferentially extending portions of each of the base and the deflection cap defining the at least one radial opening, the circumferentially extending portion of the deflector is disposed radially outward of the circumferentially extending portion of the base.

A device for packaging and dispensing a product in an airless manner, said device comprising:

• a container, defining an inner volume intended to contain the product, having two ends and a side wall extending between the ends along a longitudinal axis, the inner volume being closed off by a movable bottom and opening out through a dispensing neck, the side wall delimiting an inner surface of the inner volume;
• a dispensing member comprising a dispensing pump fastened on the dispensing neck, said dispensing pump including a suction conduit for the product;
• a purge ring comprising a base delimiting a central passage orifice for the product, the central passage orifice comprising a first end in which the suction conduit of the pump opens out and a second end opposite the first end, the central passage orifice defining a central axis of the ring extending between the first end and the second end;
• the base having an outer contour and a side surface extending between the outer contour and the central passage orifice, the side surface converging from the outer contour toward the second end of the central passage orifice;
• the outer contour of the ring coming into tight contact with the inner surface of the container;
• and
• a dead space formed between the purge ring and the dispensing member;
• wherein the purge ring comprises at least one radial opening arranged radially relative to the central axis, the at least one radial opening emerging in the central passage orifice and allowing the passage of the product from the container toward the central passage orifice,
• wherein the at least one radial opening is formed by a deflector forming a deflection cap mounted on the second end of the central passage orifice, extending across from the side surface of the base and covering at least part of the side surface of the base, the side surface and the deflection cap forming at least one flow channel for the product between them connecting the at least one radial opening to the central passage orifice,
• wherein the at least one radial opening is separated from an intersection of the flow channel with the central passage orifice in a direction of the longitudinal axis.