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.

An exemplary system for dispensing foam includes a container holding a foamable liquid, a pump, and a suck-back device. The suck back device has a housing having a small bore with first diameter and a large bore with a second diameter; a dual body piston with a first piston that reciprocates in the small bore and a second piston that reciprocates in the large bore; a flow restrictor located proximate the dual body piston, a suck back chamber formed at least in part by the large bore and the second piston, and a foam outlet. The flow restrictor is configured so that fluid flow into the suck back device causes the suck back chamber to compress and when the fluid flow stops, a biasing member causes the suck back chamber to expand and suck back residual foam into the suck back chamber.

A trigger-type liquid sprayer includes a vertical supply tube, a reservoir cylinder into which a liquid that has passed through the inside of the vertical supply tube is supplied, and a reservoir plunger disposed inside the reservoir cylinder and configured to move toward one side in an axial direction in response to supply of a liquid into the reservoir cylinder while being biased toward the other side, and the vertical supply tube has a recovery path disposed in a rear end portion of the vertical supply tube, extending downward from the reservoir cylinder, and having a lower end portion closed from below, a communication path extending in a circumferential direction of the vertical supply tube from the recovery path, and a communication opening disposed in front of the recovery path and configured to allow the communication path and an inside of a container body to communicate with each other.

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 2.8S.sub.1/S.sub.23.8, 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 4S.sub.4/S.sub.310.3.

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.

A fluid dispensing device having a flexible fluid pouch and a dispensing assembly, the dispensing assembly having a top piece and a bottom piece, the top piece having a flexible actuator including a flexible dome and a flexible flange extension, the bottom piece having a bottom portion of a pump chamber, a pump chamber inlet, a chamber inlet valve, and a bottom portion of an outlet valve, the top piece and the bottom piece mated together to form a pump chamber and an outlet valve, said device configured to allow bidirectional fluid flow through either or both inlet and outlet valves, and to dispense a volume of fluid that is less than the volume of said pump chamber. The flexible pouch may have a single opening or two openings. In the case of a single opening, the entire dispensing assembly is in the interior of the pouch. In the case of two openings, only the flexible dome extends to the exterior of the pouch. The outlet valve is configured so that the more pressure that is applied to the flexible fluid pouch, the more tightly the outlet valve seals.

A fluid dispenser includes a dispenser housing, a container for holding a foamable liquid, a foam pump, an outlet in fluid communication with the foam pump, and a vacuum actuated suck-back mechanism in fluid communication with the foam pump and the outlet. The foam pump has a liquid pump portion and an air pump portion. The vacuum actuated suck-back mechanism includes a chamber and a movable member. The chamber has a vacuum port that is in fluid communication with the air pump portion of the foam pump, and a suck-back port that is in fluid communication with the outlet. The movable member of the vacuum actuated suck-back mechanism moves under vacuum pressure to reduce the volume of the chamber. The volume of the chamber increases upon removal of the vacuum pressure.

A fluid dispenser head for mounting on a dispenser member, such as a pump, and including a bearing surface for actuating the dispenser member, and a spray wall that is perforated with a network of holes through which the fluid under pressure passes so as to be sprayed in small droplets, the dispenser head being characterized in that it further includes a suction chamber of volume that is variable, such that the volume of the suction chamber decreases when pressure is exerted on the bearing surface and increases when the pressure on the bearing surface is relaxed.

In one general aspect, a flow control valve includes: a housing including a tubular wall surrounding an interior passage, and a flow control section in which the tubular wall includes a conical inner wall surface; a protrusion disposed on an exterior surface of the tubular wall at the flow control section; a sealing member disposed in the housing and configured to be selectively moved to a sealing position in which the sealing member engages the conical inner wall surface to restrict flow of a fluid through the interior passage; and a recess disposed the conical inner wall surface and configured to allow the fluid to flow past the sealing member through the recess when the sealing member is in the sealing position, wherein the recess and the protrusion are radially aligned on the tubular wall.

A pump for dispensing a fluid product, able to be mounted on a container of the flexible tube or rigid flask type, includes a variable-volume metering chamber at least partly defined by a membrane deformable between an initial state in which the volume of the metering chamber is maximum and a deformed state in which the volume of the metering chamber is minimum. The pump also includes a valve for admitting the fluid product to the metering chamber. The pump further includes a valve for discharging the fluid product from the metering chamber. Finally, the pump includes means for opening and closing the admission and discharge valves. Notably, the pump consists of a single molded piece.