A press pump (1) comprises a press pump body 10) in which a spring tube (20) is provided, a spring (21) is contained within the spring tube (20); a cylinder head (30) mounted on the press pump body 10) and including a internal bore (31); a press head (40) including a pressing portion (41) and a rod portion (42), the rod portion (42) is fit within the internal bore (31) of the cylinder head (30), and a lower portion of the rod (42) engages with the spring (21), so that the spring (21) applies an upward bias force on the press head (40); and a piston (50) connected to the press head (40) and is slidably and sealingly engaged with the internal circumference of the press pump body 10). The press pump (1) can use a spring (21) with relatively small size, while meet the requirement of large displacement, thus reducing manufacturing cost, and also can prevent contact between the product and the spring (21), avoiding negative effects between them.

A sprayer device with a trigger operated pump is operative for pumping and spraying liquid from an attached liquid container. The trigger sprayer includes valve body provided with a base portion that is configured to be mounted to the neck of the liquid container and a delivery nozzle from which the liquid is sprayed. A fluid flow path extends from the base portion to the delivery nozzle. A pumping chamber is in fluid communication with the flow passage and there is a vent opening between the pumping chamber and the interior of said base. A piston with spaced inboard and outboard seals is movable in the pumping chamber and the vent opening is located between the seals. A check valve is disposed between the vent opening and the interior of the base portion to prevent liquid from the container from backflowing into the pumping chamber during shipment and handling.

A liquid dispensing system includes a liquid container and a one way user-actuated dispensing valve for dispensing contained liquid. The liquid container further includes a two way vent which allows for ventilation of the contained liquid/gas in response to changes in air pressure outside of the liquid container.

A dosing dispenser for dosing of at least one material component respectively received in a receiving compartment. In a dosing dispenser for the discharge of material components that has a double-walled structure of the pump unit, a ventilation path is provided leading from the outer environment to the receiving compartment through the pump unit.

A sprayer system includes a sprayer head, at least two reservoirs, and a gripping portion. The reservoirs hold constituent components of a product. The product is emitted from a nozzle included in the sprayer head. The emission of the product results in the depletion of the components of one of the reservoirs to a greater extent than the remaining at least one reservoir and changes the center of gravity of the sprayer system.

Cosmetic containers configured to hold and dispense a cosmetic product. The container may store and dispense cosmetic products from two different cavities, or it may be configured to dispense a cosmetic product from a single cavity in two different manners. A first dispensing outlet can be used by adjusting the container to a first configuration and tilting the container. A second dispending outlet is used by actuation of a pump.

A sealing vent for a foaming dispenser associated with a squeeze foaming container is described. The vent has an annular structure, with a central aperture encased by a multi-tiered disc section connected to inner facing of a thickened, axial wall. An upward angled, outer flange is connected on an outer facing of the axial wall, and the outer flange is attached at a lower elevation along the axial wall in comparison to the disc section.

A liquid pump capable of achieving pressure equilibrium includes a body, piston member, unidirectional input valve, unidirectional output valve, input inner-pipe, unidirectional gas-feeding hermetic-seal valve and input outer-pipe. The body has an input opening, output opening and piston opening. The piston member has a piston space communicating with the piston opening. The unidirectional input valve includes an input plug and input resilient element. The input plug abuts against the input opening. The unidirectional output valve includes an output plug and output resilient element. The output plug abuts against the output opening from outside. An input channel of the input inner-pipe communicates with the input opening. Direction of gas-flow between the unidirectional gas-feeding hermetic-seal valve and the input inner-pipe is opposite input direction of the input channel. The input outer-pipe has an input portion communicating with the input channel. A gas-feeding-channel is defined between a gas-feeding-portion and the input inner-pipe.

The present invention relates to a dispensing device, comprising: a connecting member to be mounted on the opening of a container, a piston, a cylinder body in which the piston is arranged so as to define a metering chamber between the piston and the cylinder body, the piston comprising a dosing inlet and a dispensing opening, the cylinder body being slidable along the piston, an inlet check valve provided to open the dosing inlet when subjected to negative pressure, an outlet check valve provided to open the dispensing opening when subjected to positive pressure.

The outlet check valve comprises a membrane with a sealing lip adapted to slide against the inner axial surface of the cylinder body.

A spray dispenser is provided, the spray dispenser comprising a container for holding a liquid to be dispensed and a dispensing assembly for extracting liquid from said container, the dispensing assembly comprising a pressure-relief valve for release of excessive pressure in the container and a filter arranged to permit egress of gas through the filter, inhibit egress of liquid from the container and to inhibit ingress of contaminants into the container through the pressure relief valve. A dispensing assembly for use is a spray dispenser is also provided.