Device for packaging and dispensing a fluid product in metered quantities

A device for packaging and dispensing a fluid product, the device comprising:

• a body which is hollow and is provided with a bottom or a lower edge;
• a container defining a reservoir and extending at least partially into an internal volume of the body, the container having an upper end of tubular shape provided with a filling opening;
• an airless-type metering assembly, comprising a stationary portion, a metering pump and an actuating portion which is movable to allow dispensing the fluid product, the stationary portion comprising a plugging element and a retaining part extending annularly around the plugging element, the stationary portion extending around the metering pump, the plugging element being separate from the metering pump and forming a support part for the metering pump;
• a connection interface for connecting in a leaktight manner the metering assembly to the reservoir, the metering pump comprising an inlet which extends to one end of the reservoir that is opposite to the bottom or lower edge;
• and
• a ring of annular shape that is separate from the body and the container, the ring extending around and being coupled to the upper end of the container and the retaining part of the stationary portion,
• wherein the container and the metering assembly belong to an integral subassembly configured to be installed in the body, the body being attached in a removable manner to the ring that retains the retaining part and the upper end of the container in an assembled state to form the integral subassembly, each of the retaining part and the container being axially integral with the ring, and
• wherein the connection interface comprises the upper end of the container to engage with the plugging element and define a radial annular sealing contact container-plugging element, the container comprising at least one leaktight and movable wall that is movable towards said inlet in order to compensate for any negative pressure in the reservoir.