A trigger dispenser device (1) for a liquid includes a dispenser head (20) provided with a pressure chamber (24) and a piston (26) sliding in the pressure chamber (24). A valve dispenser is provided to permit the passage of the liquid towards a dispenser duct (30) upon reaching a threshold pressure, and a trigger suitable for mechanically operating on dispenser valve to force the valve towards the open configuration.

A discharge head for mixing two media and discharging the mixed liquid, having a dosing chamber, a first inlet, a second inlet, and an outlet through which the mixed liquid is discharged from the dosing chamber. A displacer is movable in an actuation direction between first and second end positions to force the mixed liquid through the outlet. A volume-compensating mechanism has a wall portion which is deflectable between a minimal position in which the volume of the dosing chamber is not enlarged and a maximal position in which the volume of the dosing chamber is enlarged to a maximum extent. Deflection of the wall portion in the direction of the maximal position enables an auxiliary volume to be made available in the dosing chamber through which, with the dosing chamber already filled with the first media, the second media can still be introduced into the dosing chamber.

A trigger-type liquid dispenser includes valve member, which is provided in flow path to control liquid to flow in direction in flow path. Valve member includes intake-side check valve, which permits flow of liquid from container side to pump side and prevents flow of liquid from pump side to container side, and discharge-side check valve, which permits flow of liquid from pump side to nozzle side and prevents flow of liquid from nozzle side to pump side. Discharge-side check valve is formed in umbrella shape that is elastically deformable freely in radial direction and has outer circumferential end configured to contact inner circumferential surface of flow path, with contact force of outer circumferential end with respect to inner circumferential surface of flow path being distributed non-uniformly in circumferential direction.

A precompression system for a liquid dispensing device is presented, that prevents liquid from being discharged until a predetermined pressure has been built up. The system comprises a pump for drawing liquid through an inlet and discharging it through an outlet, and a precompression valve disposed between the pump and the outlet. The valve allows liquid in the pump to reach the outlet once the predetermined pressure is established, and stops liquid from reaching the outlet once the pressure falls below it. The precompression valve comprises an elastic diaphragm normally closing the valve opening, with a concave surface facing the valve opening and in fluid communication with the pump and a convex surface in fluid communication with atmospheric pressure. The diaphragm may be stretched around a valve seat. Methods of assembling such a precompression system in a dispensing device are also presented.

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.

Pre-compression valve systems for trigger sprayers include one-piece valve systems having both check and pre-compression valves or multiple component valve systems. The pre-compression valve is positioned in a vertical cylinder, and may have a flat, concave, or convex surface.

An actuating system is provided for a dispenser cartridge that can be mounted on a frame and that has a reciprocatable product-dispensing hollow stem that (A) is biased to an extended position in which the cartridge is unactuated, and (B) is moveable from the extended position to a depressed position in which the cartridge is actuated for discharging the fluent substance through the stem. The actuating system includes a plunger on the frame, and a discharge conduit located adjacent the frame to accommodate relative movement between the discharge conduit and the frame. The discharge conduit includes (A) ml inlet opening communicating with the dispenser cartridge hollow stem, (B) ml outlet opening from which the fluent substance can be dispensed, (C) a passageway between the inlet opening and outlet opening, and (D) an intermediate opening that is in communication with the passageway between the inlet opening and the outlet opening.

The invention relates to a device for dispensing a fluid including: a tank arranged so as to contain the fluid; a dispensing pipe arranged so as to guide the fluid in a dispensing direction; a dispensing opening connecting the tank to the dispensing pipe; a dispensing valve which, in an open state, allows fluid to pass from the inside of the tank to the dispensing pipe via the dispensing opening and, in a closed state, does not allow fluid to pass from the inside of the tank to the dispensing pipe; and a return means arranged so as to exert a force on the dispensing valve. Said force moves the dispensing valve from the open state thereof to the closed state thereof. The return means includes a pouch forming a cavity. Said pouch is located in the dispensing pipe. The shape of the pouch is changed via compression when the dispensing valve is in the open state.

A trigger dispensing head applicable to a bottle suitable for containing a product to be dispensed is provided. The trigger dispensing head has valve elements having a dome-shaped valve body provided with an elastically deformable membrane. The elastically deformable membrane has an annular sealing ring that forms a head seal of a pre-stressing valve.

A pump dispenser and a pump head for dispensing a fluid product. The pump dispenser includes a container containing the fluid product to be dispensed, a slidable follower piston positioned at the bottom the container, and a pump assembly coupled at the upper portion of the container. The pump dispenser enables relatively high product dose dispensing with a consumer preferred compact container configuration. The pump dispenser can be an airless pump dispenser and can be used to dispense high viscosity fluid products.