A manually operated trigger sprayer that stores a quantity of pressurized liquid during the charge stroke of the trigger for subsequent release during the return stroke, is presented. The trigger sprayer is configured such that an appreciable volume of liquid is dispensed during both the charge and the return strokes of the trigger, creating a continuous discharge stream, for so long as the trigger is actuated. The present invention trigger sprayer also provides an all plastic construction by replacing the metal coil spring of prior art trigger sprayers with a U-shaped plastic spring located exterior to the pump housing thereby making the trigger sprayer well-suited for recycling.

In one embodiment, a self-cleaning nozzle comprises a nozzle body, a sleeve surrounding a proximal end of the nozzle body, a pillar disposed within the nozzle body and a spring. The nozzle body may have a hollow cylindrical interior. The nozzle body may include an orifice formed in a distal end of the nozzle body, a shoulder formed on a proximal end of the nozzle body, and a first bearing surface on an outer lateral face of the shoulder. The sleeve may include a second bearing surface on an inner face of the sleeve and a retaining lip formed at a distal end of the sleeve. The retaining lip may define a distal end of an annular space between the sleeve and the nozzle body. The shoulder may define a proximal end of the annular space. The pillar may have a distal tip configured to interface with the orifice, thereby forming a liquid seal. The spring may be captured within the annular space, thereby biasing the distal tip of the pillar into contact with the orifice.

There is provided an applied liquid applicator for discharging applied liquid by turning of an operating portion provided to a barrel main body, in which filling efficiency of the applied liquid stored in the barrel main body with respect to an inside capacity of the barrel main body is improved. The applied liquid is fed to the applicator portion through the first valve and the applied liquid feed path by turning the operating portion and sliding the piston in the front-back direction by use of the cam mechanism portion.

In a foam discharge device, a pump has a piston for a liquid linked to a stem, a cylinder for a liquid in which the piston for a liquid is vertically slidably accommodated, a piston for air linked to the stem, a cylinder for air in which the piston for air is vertically slidably accommodated, and an air-liquid mixing unit to mix a liquid from the cylinder for a liquid and air from the cylinder for air to foam the liquid, the cylinder for air is inside a mounting cap and accommodated in a container main body, a head-section-side cylinder for air into which a piston tube erected at a ceiling wall section of the mounting cap is fitted extends from a pressing head, and a communication path to bring the insides of the head-section-side cylinder for air and the cylinder for air in communication is formed at the pump.

A trigger-type liquid ejector includes: an ejector main body; and nozzle member provided with an ejection hole. The ejector main body includes: a vertical supply pipe for sucking-up liquid; an ejection barrel communicating with the inside of the vertical supply pipe; and a trigger mechanism including a trigger, the trigger being arranged to be movable rearward in state of receiving forward force, and the trigger mechanism being lead liquid from the vertical supply pipe into the ejection barrel in accordance with rearward movement of the trigger and to eject the liquid from the ejection barrel. The nozzle member is provided with: a cylinder communicating with the inside of the ejection barrel through a supply hole; a plunger accommodated in the cylinder to be movable rearward in a state of receiving forward force; and a communication hole allowing the inside of the cylinder and ejection hole to communicate with each other.

A liquid sprayer apparatus includes a multi-chamber spray mechanism, with at least one chamber being adapted to accumulate pressurized fluid for dispensation over an extended time period. The liquid sprayer apparatus is capable of emitting a liquid spray over a period of time that is substantially greater than a manual pump action applied to the trigger.

A dosing dispenser for dispensing a material comprising a housing, a container moveably arranged in the housing and including the material, a pump unit, and an applicator for material output. The housing includes an actuation member which facilitates moving the container in the housing relative to the pump unit, so that the pump unit is activatable by the container for suctioning and dispensing the material. The actuation member is formed by an opening in the housing for manual access to the container in order to move the container in a linear manner. Alternatively, the actuation member is configured as a slider element which is inserted into an opening of the housing and coupled with the container, wherein the slider element is translatorically moveable in the opening so that the container is moveable back and forth by the sliding movement of the slider element in order to activate the pump unit.

Dispensing devices are provided. Such devices utilize a combination of Flair® technology, pre-compression valves and aerosol-like pressurization of the dispensed liquid. An example dispensing device has, for example, a main body comprising a pressure chamber, the latter being provided with a pressure piston and a pressure spring. The device further has a piston and a piston chamber which draws liquid from a container and fills the pressure chamber with that liquid as a user operates a trigger in various compression and release strokes. The piston chamber has both an inlet valve and an outlet valve. Liquid exiting the piston chamber under pressure enters a central vertical channel which is in fluid communication with both the pressure chamber and a dome valve, with pre-defined opening pressure, provided near the outlet channel at the top of the dispensing head.

[Object] To provide a trigger-type pump dispenser that makes it possible to prevent an out-of-nozzle squirting phenomenon that occurs at a final stage of sucking up of liquid out of a vessel into a cylinder. [Solution] A trigger-type pump dispenser A includes a handle structure 1, a nozzle base structure 2 attached to the handle structure 1, a trigger 3, a cylinder structure 4, a cap 5 by which the cylinder structure 4 is held down and attached to the mouth of a vessel, a piston structure 6 that slides inside the cylinder structure 4, an inverted-mortar-shaped lip 61 formed in the piston structure 6, a spring 7 that springs the piston structure 6, a valve case 8 attached to the nozzle base structure 2, a mortar-shaped valve seat 81 formed in the valve case 8, a leak valve 9, attached to a bottom part of the cylinder structure 4, that has a bulging portion 91 at a tip thereof, a first valve FV, and a second valve SV. A movement of the piston structure 6 from top dead center to bottom dead center causes liquid in the cylinder structure 4 to be discharged from a nozzle orifice N. The bulging portion 91 at the tip of the leak valve 9 is disposed to pass through the inverted-mortar-shaped lip 61. A through-hole diameter D1 of the mortar-shaped valve seat 81 of the valve case 8 is smaller than a nozzle orifice diameter D2.

A wobble plate for a sequentially activated multi-diaphragm foam pump includes three or more wings, a wobble plate shaft, and an aperture located in each of the three or more wings. A first wing is configured to have a first distance from first contact surface of a first pump diaphragm. A second wing is configured to have a second distance from a first contact surface on a second pump diaphragm, and a third wing is configured to have substantially the second distance from a first contact surface on a third pump diaphragm.