Abstract: A gas infuser includes a mixing chamber and a liquid injector. Gas is supplied into the mixing chamber and liquid flows through openings of the injector to mix with the gas in the mixing chamber and form a gas-infused liquid.

Abstract: A sterile solution product bag includes sterilization grade filter integrated directly into the product bag such that microbial and particulate matter filtration can be performed using the filter directly at the point of fill. The filter can include a hollow fiber filter membrane contained in a stem connected to a bladder of the product bag.

Abstract: An apparatus for supplying a liquid medium to a metering unit comprises a housing in which media channels are arranged. One of the media channels is connected to a fluid reservoir that can be acted on by compressed air.

Abstract: A container closing device for a beverage can having an opening tab which is disposed on a can lid and pivotable about a pivot reception formed in a lid bottom, the opening tab being provided with a reactive surface on its underside facing the lid bottom for contact with a liquid pouring from the pouring opening, a sealed space being realized in the area of the reactive surface and a closing piece disposed in the lid bottom between a pouring protrusion and the lid bottom so that the reactive surface is disposed at least partially in the sealed space and is sealed against the environment.

Abstract: 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.

Abstract: Provided is an aerosol product which has a simple configuration and which makes it possible to emulsify a foamable liquid and a foaming agent sufficiently and discharge a satisfactory foam without shaking the aerosol container. An aerosol product (100) has a plurality of partitioned housing spaces and a valve unit (120) provided with an inflow port (122) corresponding to the housing space, wherein at least one among the plurality of housing spaces is a foamable liquid housing section (141) that houses contents (S) including a foamable liquid, at least one other of the plurality of housing spaces is a foaming agent housing section (140) that houses contents including a foaming agent (LG), and the foamable liquid (S) discharged from the inflow port (122) and the foaming agent (LG) discharged from the inflow port (122A) are mixed in an actuator (130).

Abstract: A dispensing device including a cap having an insertion orifice and a stopper, the cap and the stopper being arranged so that the stopper is mounted in the cap on the side of the insertion orifice. The device includes a deformable chamber whose interior volume is arranged to contain a fluid, the chamber having an inlet to conduct a fluid along a circulation path of fluid from the inlet then through the chamber and to an outlet. The device further includes a pressing part arranged to be movable so as to modify the interior volume, and at least one reservoir film extending towards outside of the cap to form a fluid reservoir in communication with the chamber through the inlet, the at least one reservoir film being held by a force exerted by the stopper on the cap.

Abstract: Provided is a foam discharger including: a mixing portion for mixing a liquid agent and a gas to foam the liquid agent; a discharge opening for discharging the foamed liquid agent; and a flow path in communication with the discharge opening, and for supplying the foamed liquid agent from the mixing portion to the discharge opening. The discharge opening is provided with a first porous member. On an upstream side of the first porous member, a cross-sectional area of the flow path on a cross section orthogonal to a supply direction in which the foamed liquid agent is to be supplied increases along the supply direction. The cross-sectional area of the flow path at the discharge opening is at least 1.2 times the minimum cross-sectional area of the flow path.

Abstract: A dispensing tap for liquids includes a body connected to the neck of a container, a dispensing head with an outlet or mouth, and a throat connecting the body to the dispensing head. A shut off valve is configured for sealing engagement with the mouth of the dispensing head, and a piston is axially guided within the dispensing head. The piston includes a peripheral seal slidably engaged with an interior surface of the dispensing head, and a valve stem coupled to the shut off valve. The piston is selectively actuable between a normally closed position an open position. A vent is in communication with an interior of the body and the vent is opened and closed with movement of the piston and shut off valve.

Abstract: A foam discharging device includes: a storage portion that stores a liquid agent; a foamer mechanism that changes the liquid agent into foam to generate a foam body; and a discharging portion that discharges the foam body. The discharging portion includes a foam passing chamber that allows the foam body to pass, and one or a plurality of ejection-port forming wall portions that extend downward below the foam passing chamber, are formed into a closed-loop shape in plan view, have the inner space communicating with the foam passing chamber, and have the lower edge having an ejection port formed thereon. At least part of the ejection-port forming wall portion has a bottom end portion formed into a shape that has a thickness reduced toward the lower side. The ejection-port forming wall portion and a second portion. The height position of a lower edge of the first portion is higher than the height position of a lower edge of the second portion.

Abstract: The present invention is a device for dispensing a mixture of a first fluid and a second fluid, suited to be applied to a container holding said fluids. The device comprises a mixing chamber for these fluids, a suction tube suited to draw the second fluid in order to convey it into the mixing chamber and a tank-chamber arranged between the suction tube and the mixing chamber. The device also deviates a quantity of the first fluid coming from the suction tube towards the tank-chamber.

Abstract: A foam pump has dual, coaxial air and liquid cylinders, each having a respective air and liquid piston which move together during a dispensing operation. One or more air passageways between the air cylinder and a liquid-air mixing chamber are configured to impart rotation to an airstream passing from the air cylinder to the mixing chamber to increase turbulent mixing of the air and liquid in the mixing chamber. The liquid cylinder is axially aligned with the air cylinder to provide a low profile pump which does not require a dip tube or sleeve to communicate with the bottom of the liquid source when used in an inverted application wherein the foam pump is positioned below the source of liquid. A resilient valve member in the liquid outlet is biased to close on its own to prevent leaking in the event the air and liquid pistons do not fully return to the home position.

Abstract: An essential oil reflux-type atomizer comprising the following structures: a chassis, housing, atomization chamber, gas pump, gas tube, gas nozzle, oil nozzle, and filter atomization mechanism. Oil and gas flow together at the gas and oil nozzles to disperse and atomize the oil in the gas flow.

Abstract: A piston is formed by an outer edge of the cap. The piston and an inner wall of the nozzle body form a dynamic seal for the air cylinder, so that a main body of the air pump is formed. The cap extends downwardly to form a hydraulic cylinder. The hollow compression rod connects a pump component of the hydraulic cylinder and the mixing chamber of the head, so that a main body of the liquid pump is formed. The hollow compression rod is provided with an upper disk. The upper end of the upper disk passes the air outlet of the nozzle body and is inserted into the connecting pipe of the head in snap fit, and the upper disk opens or closes the air outlet. A fastening position is designed to form a gap between the head and the nozzle body to realize a floating valve function at the head.

Abstract: A foamer mechanism (20) of a foam dispensing container has a gas-liquid contact chamber (21), a liquid agent flow passage (22) through which a liquid agent supplied from a liquid agent supply portion (28) to the gas-liquid contact chamber (21) passes, and a gas flow passage (23) through which a gas supplied from a gas supply portion (29) to the gas-liquid contact chamber (21) passes. The gas flow passage (23) has a gas opening (23a) that is open to the gas-liquid contact chamber (21). The liquid agent flow passage (22) branches into plural branch flow passages (for example, branches into a first branch flow passage (221) and plural second branch flow passages (222)). Each of the plural branch flow passages has a liquid agent opening (22a, 22b) that is open to the gas-liquid contact chamber (21).

Abstract: An apparatus or method for generating a microfoam, the apparatus comprising a channel having an inlet and an outlet, a source of foamable liquid and pressurised gas arranged to feed into the inlet, wherein the channel is comprised of a spatially oscillating flow channel to provide an oscillating flow direction, the spatially oscillating flow channel oscillating about a bulk flow direction, the spatially oscillating flow channel providing a sequence of planar cross-sections perpendicular to the flow direction, with a sub-sequence of planar cross-sections that are perpendicular to the bulk flow direction in the plane in question, the sub-sequence comprising at least one plane that does not overlap with at least one other plane in the sub-sequence.

Abstract: A sprung display case for dispensing products, particularly heavy products such as beverage multipacks. The case comprises a vertical chamber that is open at an upper end and is sized and shaped such that a plurality of the products can be vertically stacked within the chamber; a horizontal platform that is mounted to be vertically slidable within the chamber, the platform having at least one air hole formed therethrough; a single resiliently compressible member mounted in the chamber between a lower side of the platform and an upper side of a base of the chamber to bias the platform towards the upper end of the chamber; and a tether fixed at a first end to the platform and at a second end to the base of the chamber to prevent the platform moving out of the upper end of the chamber.

Abstract: A foaming component for use in a foaming liquid dispenser, and an insert arranged so that it may be inserted into a liquid dispenser comprising the foaming component. The foaming component comprises a liquid chamber; an air chamber; a sparging component, which comprises a sparging interface and a foaming region; an exit aperture; and a pumping mechanism. The pumping mechanism is arranged such that it can transfer liquid from the liquid chamber directly to the foaming region, and air from the air chamber to the foaming region, via the sparging interface. The forcing of air through the sparging interface causes bubbles to form in the liquid located in the foaming region, resulting in a foamed mixture for dispensing. The pumping mechanism is then used to transfer the foamed mixture from the sparging component through the exit aperture, wherein the sparging interface is arranged such that at least a portion of the foaming region is positioned in between opposing surfaces of the sparging interface.

Abstract: A hand foam pump fabricated entirely from plastic components for dispensing foamable liquids, is provided. The hand foam pump includes an actuator, a closure, a housing, cylinder bores for an air piston and a liquid piston within the housing and an air piston and a liquid piston fixed to a stem, wherein the air and liquid pistons are reciprocally mounted within the cylinder bores, and check valves, among other components. An elastic, dome shaped, plastic return spring is utilized to return the actuator to its rest position after actuation. The plastic return spring is positioned over the closure and below the actuator. The all plastic hand foam pump is suitable for dispensing foamable liquids from a dispenser bottle. Used pumps do not require disassembly to be recycled.

Abstract: The invention concerns a device (10) for dispensing a mixture (S) constituted by a first fluid (F1) and a second fluid (F2), suited to be applied to a container (C). The device comprises: an outlet duct (20) for the mixture (S); a reception and/or transit chamber (43); means (50, 60) for generating the mixture (S); first valve means comprising a first movable element (32); second valve means comprising a second movable element (32); third valve means comprising a third movable element (31a, 31b). Two among the first movable element (32), the second movable element (32) and the third movable element (31a, 31b) belong to a single valve element (30; 130). The invention concerns also a system for dispensing a mixture (S) constituted by a first fluid (F1) and a second fluid (F2) comprising a container (C) and a device (10) as described above.

Abstract: An exemplary foam dispensing system includes a dispenser housing configured to be mounted below a counter, a spout configured to be mounted above a counter, a container supported by the dispenser housing, a pump in fluid communications with the container and configured to be mounted below a counter. The pump includes an air pump portion and a liquid pump portion. The pump also includes a mixing chamber. Liquid pumped from the liquid pump portion is mixed with air pumped from the air pump portion in the mixing chamber. A dispense tube is included that is configured to extend from the mixing chamber below a countertop to one or more mix media located above the countertop proximate an end of the spout. The one or more mix media are located near an end of the spout. An outlet nozzle is also provided and is located downstream of the one or more mix media.

Abstract: A foaming dispenser has a mixing chamber configured to mix a liquid and a gas to foam the liquid, a first liquid passage configured to supply the liquid to the mixing chamber, and a discharge opening configured to discharge the foamed liquid, the mixing chamber includes a plurality of second liquid passages branching and extending from the first liquid passage, a liquid passage meeting where one second liquid passage meets another second liquid passage, a gas passage configured to supply the gas to the liquid flowing from the plurality of second liquid passages to the liquid passage meeting, and a hole that is provided on a downstream side of the gas passage and communicates with the discharge opening.

Abstract: A foam soap-providing machine with function of recycling soap-liquid, which comprises: a container containing a soap-liquid and having a soap-releasing portion; a shell-group including at least two detachable shell-bodies combinedly disposed on the outer peripheral surface of the soap-releasing portion; and a faucet mounted on the upper end of the soap-releasing portion and having a soap-feeding portion provided for flowing out the pressurized soap-liquid; wherein the soap-feeding portion has a joint end; wherein a foam-generating module used to generate a foam and a foam-recycling module used to recycle the extruded unused foam are comprised in the shell-group; thereby it can generate foam and recycle the remaining foam in the soap-releasing portion through a single motor. Accordingly, the present invention greatly saves the structural volume and prevents the soap-liquid from being dropped outside and wasted.

Abstract: Exemplary foam-at-a-distance systems include a spout, a container, and a foam generator having a suck-back mechanism located within the spout. The system includes a liquid pump chamber, an air pump chamber, a liquid conduit and an air conduit. The foam generator has a differential bore housing. The differential bore housing has a first portion with a first inside bore and a second portion with a second inside bore, wherein the first inside bore has a smaller diameter than the second inside bore. A piston having a seal extending from the piston that is in contact with the second inside bore is also included. A mixing chamber is located in the large bore. Movement of the seal in an upstream direction provides negative pressure in the second mixing chamber and draws in fluid from the outlet.

Abstract: A dispensing system includes an above-deck nozzle portion, a reservoir for holding fluid, a foam pump, a multi-lumen dispense passage, and a mixing portion. The above-deck nozzle portion has a dispenser outlet and is disposed above a counter. The foam pump is disposed below the counter and includes at least one liquid pump chamber in fluid communication with the reservoir, at least one air pump chamber, and a pump outlet. The multi-lumen dispense passage includes an inlet, an outlet, at least one liquid lumen, and at least two air lumens. The inlet is in fluid communication with the pump outlet, the outlet is in fluid communication with the dispenser outlet, and the at least one liquid lumen and the at least two air lumens are each in fluid communication with the inlet and the outlet of the multi-lumen dispense passage. The mixing portion is disposed between the multi-lumen dispense passage and the dispenser outlet.

Abstract: A foam dispenser includes an air pump for pumping and outputting air, a liquid pump for pumping and outputting liquid soap, a mixing chamber for receiving the liquid soap and the air, and a controller for inversely controlling the outputs of the liquid pump and the air pump. A method of controlling the quality of foam produced by a foam dispenser including a liquid soap pump and an air pump includes simultaneously inversely varying the output of each of the pump for adjusting the quality of the foam produced.

Abstract: Foam dispensing systems and methods are disclosed. Such systems and methods may include a foamed material dispenser, a dynamic mixer having a gas input, a process material input, and a foamed material output. The foamed material output may be in fluid communication with the foamed material dispenser. A pump having an output may be in fluid communication with the process material input of the dynamic mixer, and a gas injection valve may be in fluid communication with the gas input of the dynamic mixer. A gas pressure regulator may be coupled between the pressurized gas supply and the gas injection valve, and a gas injection cycle timer may be operatively connected to the gas injection valve, the gas injection cycle timer causing the gas injection valve to pulse open and closed to send pulses of pressurized gas into the dynamic mixer through the gas input.

Abstract: The device for packaging and dispensing a product comprises a container provided with at least one variable volume compartment, and a dispensing head fastened to the container. The dispensing head comprises a mounting base, an internal piston that is movable in translation along a displacement axis Y-Y? and delimits, inside said base, first and second pumping chambers, and at least one actuating rod that extends through the pumping chambers and the piston and projects from either side of the mounting base. The actuating rod internally delimits a first feed duct in communication with a first outlet orifice of the dispensing head and a second feed duct separate from said first duct and in communication with a second outlet orifice of said head.

Abstract: A dispensing system having a treatment cartridge utilizing linear translation of the treatment cartridge within the manifold to actuate a valve to dispense a fluid. To dispense the fluid, a person pushes their glass or other container against a dispensing lever that translates the treatment cartridge within the manifold causing a cam surface on the filter's circumferential exterior to actuate a valve sending the fluid from the valve though the treatment cartridge and out a dispensing orifice in the treatment cartridge into the glass.

Abstract: A piston pump with a piston chamber-forming body and a piston-forming element relatively coaxially reciprocally movable to dispense liquid and air from a discharge outlet, which the discharge outlet is fixed relative to the piston chamber-forming body.

Abstract: A pivot-to dispense soap pump includes an actuator that dispenses soap when actuated. The actuator is configured to move downward when actuated by user input. The downward movement may be in either one of a linear movement, maintaining the actuator is a horizontal orientation, or a pivoting movement about a pivot point. The pivot point is located on a distal end of the actuator, which is opposite the nozzle. The pivoting motion allows a user to depress the actuator proximate to the nozzle, thereby allowing the user to dispense soap into the same hand used to actuate the actuator. As a result, efficient, one-handed soap pumping and dispensing is enabled.

Abstract: A foam dispenser has a foam-generating pump (1) mounted on a container (100) to hold liquid. The pump (1) has a liquid intake conduit with a ball valve (27) and an air intake conduit (45) provided partly by a jacket component (4) fitting around the pump body (2) with clearance. The pump has structure defining a mixing zone (50) for mixing air and liquid, a foam chamber (28) for holding foam received from the mixing zone, and a discharge conduit leading from the foam chamber to a discharge outlet (36). The mixed air and liquid pass through a permeable foam regulator mesh (54). One or more air inlets (47) lead into the mixing zone (50) from the air intake conduit (45). A liquid inlet in the form of a restricted jet orifice (89) leads into the mixing zone (50) from the liquid intake conduit, upstream of the inlet ball valve (27). A regulator mesh (53) is also provided between the liquid inlet and mixing zone.

Abstract: An irrigation and aspiration device includes a drive assembly, an evacuation chamber, and a delivery apparatus. The delivery apparatus includes an evacuation tube configured to hold an irrigation solution and a vacuum tube that is in fluid communication with the evacuation chamber. The drive assembly is configured to store a restoration energy within the evacuation chamber and force the irrigation solution out of the evacuation tube in response to an applied force. The device is configured to use the restoration energy to draw an aspiration fluid into the vacuum tube.

Abstract: The present invention provides a foam dispensing unit (10) that dispenses a content liquid in a foamed state by causing the content liquid pumped out via a liquid flow channel (23) to pass through a porous member (29) provided in a foaming flow channel (24) together with air, the foam dispensing unit including a mechanism for variably positioning a passage surface (40), the mechanism rotatably holding the porous member (29) in the foaming flow channel (24) to variably position a content liquid passage surface of the porous member (29). The mechanism for variably positioning a passage surface (40) includes a loosely holding region (41) formed in the foaming flow channel (24) and the porous member (29) loosely mounted in the loosely holding region (41).

Abstract: According to one embodiment, an exhaust system includes a first pump unit, a second pump unit, a shaft, and a motor. The first pump unit includes a first exhaust chamber, a first intake port, a first exhaust port, and a first rotor. The first intake port, the first exhaust port, and the first rotor are provided in the first exhaust chamber. The second pump unit includes a second exhaust chamber, a second intake port, a second exhaust port, and a second rotor. The second intake port, the second exhaust port, and the second rotor are provided in the second exhaust chamber. The shaft links the first rotor and the second rotor. The motor causes the first rotor, the second rotor, and the shaft to rotate.

Abstract: Disclosed in the present invention is a pump type dispenser which includes a pump held by a mouth portion of a container and configured to suction and pressure-feed a content liquid in the container, and a nozzle head having an internal passage through which the pressure-fed content liquid passes and driving the pump by being repeatedly pushed down and restored. The internal passage includes a vertical passage, a lateral passage, and a protrusion protruding toward an inner side in a joining portion between the vertical passage and the lateral passage, and a dispensing member disposed in the lateral passage includes a recessed portion which engages with the protrusion to prevent separation from the lateral passage.

Abstract: A foam pump has dual, coaxial air and liquid cylinders, each having a respective air and liquid piston which move together during a dispensing operation. One or more air passageways between the air cylinder and a liquid-air mixing chamber are configured to impart rotation to an airstream passing from the air cylinder to the mixing chamber to increase turbulent mixing of the air and liquid in the mixing chamber. The liquid cylinder is axially aligned with the air cylinder to provide a low profile pump which does not require a dip tube or sleeve to communicate with the bottom of the liquid source when used in an inverted application wherein the foam pump is positioned below the source of liquid. A resilient valve member in the liquid outlet is biased to close on its own to prevent leaking in the event the air and liquid pistons do not fully return to the home position.

Abstract: Devices and methods mix a bone cement and comprise at least one cartridge, wherein the cartridge comprises in its interior a cylindrical mixing chamber, a discharge piston movable in the cylindrical mixing chamber in the longitudinal direction and sealable against the walls of the mixing chamber, a mixing device for thoroughly mixing the content of the mixing chamber, which is arranged in the interior of the mixing chamber. The mixing device is operable externally via a mixing rod and the mixing rod is guided through a passage in the discharge piston such that it can be rotated and displaced in the longitudinal direction by the discharge piston. The cartridge comprises a discharge opening opposite the discharge piston, wherein, in the mixing chamber, a first component is contained between the discharge piston and the discharge opening, wherein a monomer fluid as a second component is introducable through the discharge opening into the mixing chamber.

Abstract: A valvular conduit, preferably a Tesla valvular conduit, in which a plug member is coaxially received within a bore in a sleeve member and in which passageways are defined between the plug member and the sleeve member within interior walls configured to permit mixing of fluid flowing through the passageways in at least one direction, preferably, the relatively free passage of fluid through the passageways upstream but increased the resistance to downstream flow of the fluid through each passageway.

Abstract: A pourer attachment that is selectively engageable with a bottle is provided for pouring and mixing a base liquid (e.g., liquor) and a secondary liquid (e.g., hydration concentration). The pourer includes a neck section and a base section. The base section includes a reservoir for containing the secondary liquid and is in fluid communication with a secondary liquid channel of the neck section through which the secondary liquid may be poured when a lid associated with the pourer is open. An aperture in the lid allows the base liquid to be poured when the lid is in a closed position. As such, when the lid is in its open position, both the secondary liquid and base liquid may be poured and mixed, and when the lid is in its closed position, only the base liquid may be poured.

Abstract: A foamer dispenser including a mesh filter that is disposed in a mixture flow path of a jet ring to allow a mixture to pass is provided. A connecting flow path area between a liquid flow path and the mixture flow path and a connecting flow path area between an ambient air flow path and the mixture flow path have the relation 2.8?S1/S2?3.8, and/or, a smallest flow path area of the mixture flow path is located on an immediately upstream side of the mesh filter, and the smallest flow path area and a flow path area of the mesh filter have the relation 4?S4/S3?10.3.

Abstract: An exemplary foam dispenser includes a housing, a drive motor and a foam pump operatively coupled to the drive motor. The foam pump is secured to the housing and the foam pump includes a housing and a molded multi-chamber diaphragm. The molded multi-chamber diaphragm includes a liquid pump chamber, two or more air pump chambers; and an outlet valve. A mixing chamber is included and located downstream of the outlet valve for mixing foamable liquid from the liquid pump diaphragm with air from each of the two or more air pump chambers. In addition, a foam cartridge and an outlet for dispensing foam are also included.

Abstract: Refill units for foam dispensers include a container for holding foamable liquid, a foam pump secured to the container, a foaming cartridge, an outlet and an actuation mechanism. The foam pump includes a housing, a liquid pump diaphragm, a plurality of air pump diaphragms, and a mixing chamber. An actuation mechanism releasably connects to a drive system in the dispenser. The actuation mechanism sequentially activates the liquid pump diaphragm and the air pump diaphragms when the refill unit is connected to the dispenser and the drive system. Sequential activation of the liquid pump diaphragm and air pump diaphragms causes the liquid pump diaphragm to pump at least a partial dose of liquid into the mixing chamber and the air pump diaphragms to pump at least a partial dose of air into the mixing chamber.

Abstract: Foaming cartridge for use with a foam pump, refill unit or foam dispenser includes a housing and a foaming stage disposed within the housing. The foaming stage includes two or more mix media located within the foaming stage. At least two of the mix media are sponges and the sponges have different porosities.

Abstract: The present application discloses liquid dispensers, refill units for liquid dispensers, liquid pumps, lost motion devices, and methods for installing a refill unit and lost motion device. In certain embodiments, a liquid dispenser of the present application comprises a container for holding a liquid, a pump housing connected to the container, a liquid or air chamber, and a piston movable in the liquid or air chamber. A connector is linked to the piston. The connector has a flexible portion for connecting to the piston and an attachment portion for attaching to an actuator of the dispenser. A restrictor is positioned between the flexible portion of the connector and the piston. Movement of the connector a first distance in a first direction results in lost motion between the actuator and the piston and continued movement of the connector a second distance in the first direction moves the piston with the actuator.

Abstract: An exemplary refill unit for a foam dispenser includes a container for holding a foamable liquid and a liquid pump connected to the container and an outlet nozzle. The liquid pump has a rigid back plate and a flexible membrane. The flexible membrane and the rigid back plate form an arcuate shaped liquid pump chamber. The rigid back plate has a liquid inlet located proximate a first end of the arcuate shaped pump chamber and a liquid outlet located proximate a second end of the arcuate shaped pump chamber. The liquid pump is actuated by progressive compression of the flexible membrane against the back plate.

Abstract: A foam-dispensing pump includes an actuator, a collar, a housing, an air piston, a liquid piston, a mesh element and an air valve structure. The collar is constructed and arranged for attachment to a liquid storage container and a portion of the actuator is received by the collar. The air piston is constructed and arranged to be moveable within the housing. The liquid piston is constructed and arranged to be moveable within the housing. The mesh element is constructed and arranged to receive air and liquid for the production of foam. The air valve structure includes an annular sleeve component which is assembled onto the liquid piston and a cooperating annular valve element which is received by the air piston.

Abstract: An exemplary refill unit for a dispenser includes an inverted non-collapsing container for holding a liquid. A pump housing is secured to the bottom of the inverted non-collapsing container. The pump housing includes a pump chamber for pumping fluid out of the inverted non-collapsing container. The pump housing includes an annular venting chamber. The annular venting chamber has a floor with an opening therethrough. A vent valve is located within the venting chamber. The vent valve has a first wiper seal in contact with a wall of the annular venting chamber.

Abstract: Exemplary embodiments of vented refill units and dispensers having vented refill units are disclosed herein. An exemplary refill unit includes a non-collapsing inverted container. The container has a neck located at the bottom of the container. A pump is secured to the neck. The pump has a housing that has a cylindrical outside surface. In addition, the housing has an attachment mechanism for attaching the pump to a venting insert. The venting insert has a cylindrical inside surface and a cylindrical outside surface. At least a portion of the venting insert is located within the neck. An air passage is located between the pump housing and the cylindrical inside surface of the venting insert. One or more apertures are located through the venting insert. A one-way air inlet valve is located proximate the one or more apertures.

Abstract: A valvular conduit, preferably a Tesla valvular conduit, in which a plug member is coaxially received within a bore in a sleeve member and in which passageways are defined between the plug member and the sleeve member within interior walls configured to permit mixing of fluid flowing through the passageways in at least one direction, preferably, the relatively free passage of fluid through the passageways upstream but increased the resistance to downstream flow of the fluid through each passageway.