Dispenser equipped with a liquid pump and a pressurized gas/liquid nozzle

Liquid dispenser, comprising:

• a receptacle containing a liquid to be dispensed and pressurized gas;
• and
• a dispensing pump connected to the receptacle and having:
• a push-button movable between a rest position and an actuated position,
• wherein actuation of the push button introduces the liquid from the receptacle into a compression chamber which communicates with the liquid, compresses the liquid, and then dispenses the liquid under pressure through a dispensing nozzle borne by the push-button, and
• a central supply chamber arranged around an axis and a central outlet channel communicating, on the one hand, with the central chamber and, on the other hand, with the outside of the dispenser,
• wherein the dispensing nozzle includes a peripheral supply chamber, and a peripheral outlet channel communicating, on the one hand, with the peripheral chamber and, on the other hand, with the outside, the peripheral chamber surrounding the central chamber and the peripheral channel surrounding the central channel, the central and peripheral chambers as well as the peripheral channel being arranged circumferentially around the axis of the central chamber, the peripheral chamber communicating with the gas contained in the receptacle through a first valve which is closed when the push-button is in the rest position and open when the push-button is actuated, and
• wherein the push-button is slidably mounted on a collar surrounding a cylindrical pump body to which the collar is secured, the collar is held on the receptacle by a cup via a sealing washer, a hollow piston rod which passes through a center of the collar is secured to the push-button, and an inside of which rod communicates with the central chamber for supplying the liquid to be dispensed, a piston bears a cylindrical bush and surrounds the piston rod, an end of the bush interacts with an external surface of a skirt borne by the collar, the skirt being radially outward of the piston rod and radially inward of the bush of the piston, a second valve includes a first bearing surface received by a first seat under the action of a spring in order to close off the inside of the piston rod to the central chamber, and a third valve includes a second bearing surface intended to be applied on a second seat when the push-button is actuated, in order to close the connection between the liquid contained in the receptacle and the inside of the pump body.