A reciprocating foamer pump avoids problems encountered when conventional foamer pumps are exposed to freezing temperatures. In particular, the inventive pump provides an extra-secure connection between air and liquid piston members (200,300). Additionally, a tortuous air inlet (210) is provided to the foamer chamber (136) so as to prevent melted liquid from draining and accumulating in the air chamber.

Various dispensing devices, such as foaming soap pumps, are disclosed. The soap pump can include a fluid storage unit and a fluid handling unit. The fluid storage unit can include a reservoir that is configured to hold a quantity of product, such as liquid soap. The fluid handling unit can include a pumping assembly and dispensing assembly. The soap pump can be configured to withdraw liquid soap from the reservoir, convert the liquid soap to foamed soap, and dispense the foamed soap from the discharge assembly.

An apparatus and method directed to aspirated-type high-expansion foam generation having a nozzle manifold configured to receive a foam solution and at least one nozzle assembly. The generator includes a foam generator assembly disposed adjacent the nozzle manifold. The foam generator has a body portion having a first foam generating portion and a second foam generating portion that is connected to the first foam generating portion. The generator is configured with a main header of the nozzle manifold disposed orthogonal to at least one sub-header; less than six nozzle assemblies; a ratio of a diameter of an inlet of a respective nozzle to a distance from an inner wall surface of the header to the inlet of the respective nozzle is 0.8 or less; and a nozzle with a nozzle insert with a crossover path defined by a non-sharp transition member and a cone shaped tip.

A leakproof gas-liquid mixing pump has a lower shell body, a pressing member and an upper shell body, the lower shell body has a liquid channel part and an outer shell part, the pressing member has a pressing part, a liquid guiding part and a first spring, the upper shell body surrounds the pressing member and is connected to the outer shell part and the liquid container. The leakproof gas-liquid mixing pump solves the problem that the gas-liquid mixing pump of the state of the art will leak when used upside down.

A foam sprayer includes a body defining a channel, a nozzle, and an adapter configured to releasably attach to a first fluid source that provides a first fluid at a first pressure. The foam sprayer includes a connector attached to the body and configured to releasably connect the body to the adapter or to a second fluid source that provides a second fluid at a second pressure that is substantially greater than the first pressure. The foam sprayer also includes a mode selection device configured to switch the foam sprayer between a low-pressure mode and a high-pressure mode. The foam sprayer is configured to generate foam from the first fluid when the foam sprayer is in the high-pressure mode. The foam sprayer is configured to generate foam from the second fluid when the foam sprayer is in the high-pressure mode.

Provided is a dispensing head with a trigger for a dispensing device having a frame, a piston chamber, a piston, a dispensing duct, a suction duct, pre-compression valve means, suction valve means, and a nozzle assembly having a nozzle and a dual chamber foamer. The dispensing head is particularly effective for dispensing products with sanitizing and antimicrobial effect.

Provided is a device which is capable of ongoing measurement of variable foaming tendencies in a fluid system and provide a signal to regulate the feed rate of defoamer accordingly to maintain foaming at an acceptable target level. The regulation of feed can be accomplished automatically or manually.

A trigger-type liquid dispenser includes a dispenser main body, pump, and nozzle. The body includes a fitted portion, which communicates with a delivery port. The nozzle includes a partition wall, which covers an opening end of the fitted portion and has a dispensing hole, and an outer circumferential wall. The nozzle is rotatable with respect to the fitted portion between an opened position, wherein the hole communicates with the port, and a closed position, wherein the hole is blocked. The outer circumferential wall includes a locking projection, in undercut engagement with a projecting portion, on an outer surface of the fitted portion, to hold the nozzle in engagement with the fitted portion. The locking projection, in an inner edge portion thereof, has a concave portion, wherein the degree of undercut engagement with the projecting portion is reduced when the nozzle is located between the opened and the closed position.

A foamer for use in dispensing a liquid product with a foam consistency includes a top cap, a closure, a housing, an air-flow diaphragm, a mesh screen and a valve structure. The closure includes a portion which is received by the cap and these two (2) cooperate to define a foam outlet. The housing is assembled into the closure and the diaphragm is assembled into the housing. The mesh insert is positioned adjacent the foam outlet. The valve structure is provided in two (2) embodiments, one being a duckbill valve with a corresponding holder and the other being a metering valve with a corresponding holder.

A foam discharger includes a foamer mechanism (20), the foamer mechanism (20) includes: a liquid flow path (50) through which liquid supplied from a liquid supply unit to a mixing part (21) passes; and a gas flow path (70) through which a gas supplied from a gas supply unit to the mixing part (21) passes, the liquid flow path (50) includes an adjacent liquid flow path (51) having a liquid inlet (52) open to the mixing part (21), the gas flow path (70) includes a plurality of adjacent gas flow paths (71) each having a gas inlet (72) open to the mixing part (21), and the liquid inlet (52) is arranged at a position corresponding to a merging part (22) of gases supplied from the plurality of adjacent gas flow paths (71) to the mixing part (21) via the gas inlet (72).