The invention relates to a liquid dispensing device comprising: a piston chamber; a piston that is moveable within the piston chamber to pressurise a liquid to be dispensed; a nozzle with a defined throughput for dispensing the liquid; an outlet valve having a defined minimum opening pressure arranged between the piston chamber and the nozzle; and a prime valve for priming the device. The prime valve may be mechanically operable and may be arranged on or in the piston. The liquid dispensing device may further comprise an operating member, which may protrude from an end wall of the piston chamber and which may be arranged to move the prime valve from a closed position to an open position when the moveable piston is near or at an end of its stroke. The outlet valve may be configured to minimize a difference between its opening pressure and its closing pressure. It may comprise a dome and the dome may have a stiffness which varies in radial direction.

A pump 1 for dispensing a cosmetic product, having a pump body 10 and a diaphragm 20. The pump body 10 and the diaphragm 20 are rigidly interconnected and together define an interior space 19 in the pump 1. The pump 1 is equipped with an intake valve 222, which is designed to regulate the intake of the cosmetic product into said interior space 19. The pump 115 is equipped with an outlet valve 201, which is designed to regulate the expulsion of the cosmetic product from said interior space 19. The dispensing pump 1 is designed such that the diaphragm 20 being pushed down causes the intake valve 222 to close and the outlet valve 201 to open, and such that the diaphragm 20 being released causes the outlet valve 201 to close and the intake valve 222 to open.

A device for dispensing a fluid includes a pocket whose interior volume is delimited by a deformable wall; a pressing surface; a dispensing part including a dispensing cavity, an outlet; a dispensing orifice connecting the pocket to the dispensing cavity, and a dispensing valve located in the dispensing cavity.

Disclosed is an upside-down sprayer with an auxiliary air conducting device for liquid pumping, including a container, a nozzle, and a dip tube equipped with a switching valve near its upper end, which has a valve casing, a valve ball, and an inverted liquid pumping port. An auxiliary air conducting device is disposed adjacent to the switching valve and includes a connection part, a guide seat, and a projecting tube with an opening, wherein the connection part is positioned on the dip tube, the guide seat has a groove, and the projecting tube communicates with the groove. The opening of the projecting tube is offset in the direction of the inverted liquid pumping port, and the height of the opening is not lower than the height of the inverted liquid pumping port when used inverted.

Device having a dispenser on a reservoir containing one or more doses of fluid product. The dispenser has a pump body containing a chamber and a head with an orifice with a removable cap. The head is axially displaceable with respect to the pump body. A piston cohesive with the head is adapted to slide in the chamber between a high abutment position, in which the volume of the chamber is maximal, and a low abutment position, in which the volume of the chamber is minimal. During fitting of the dispenser, the protective cap tightly closes the dispensing orifice and the piston is in its low abutment position. The chamber is filled with the fluid product by displacing the piston from its low abutment position towards its high abutment position, and the fluid product is dispensed by displacing the piston from its high abutment position towards its low abutment position.

A pressurizable fluid container apparatus, system and method of use.

Priming cap intended to cover, in a closure position, a dispensing head of a device for dispensing fluid product, the dispensing head having an axial end wall provided with a dispensing orifice, the priming cap having a mechanism for trapping fluid in order, in the closure position, to receive and retain fluid that is dispensed through the dispensing orifice during actuations of priming the dispensing device.