Abstract: A foam-forming assembly includes a housing having an air passage and a liquid passage, each ending in a mouth and being in communication with a dispensing passage having a dispensing opening, and a valve body which, in a rest position, covers the mouth of the liquid passage and the mouth of the air passage in a sealing manner in order to prevent a flow from the liquid passage and the air passage to the dispensing passage. During dispensing, the valve body opens the mouth of the liquid passage and the mouth of the air passage in order to allow mixing of air and liquid to take place in the dispensing passage. The mouth of the air passage is substantially annular, and the air passage includes a pressure balance chamber to divide the air pressure substantially equally over the substantially annular mouth.

Abstract: The invention provides a dispensing assembly to dispense a foam, comprising: ?—a double cylinder element (2) mounted or to be mounted in an opening of a container (100), comprising a liquid cylinder (3) and an air cylinder (4), wherein the liquid cylinder has a smaller diameter than the air cylinder, and wherein the liquid cylinder and the air cylinder are arranged substantially concentrically, and ?—a piston assembly (10) comprising a liquid piston (11) and an air piston (12) for reciprocal movements in the liquid cylinder and air cylinder, respectively, and a common operating part for operating the liquid piston and air piston, ? wherein a liquid pump chamber (14) is at least delimited by the liquid cylinder and the liquid piston, said liquid pump chamber having a liquid inlet (15) and a liquid outlet (16), ? wherein an air pump chamber (25) is at least delimited by the air cylinder, the air piston and the liquid piston, said air pump chamber having an air inlet (26) and an air outlet (27), ? wherein the pi

Abstract: A dispensing assembly to dispense a foam, having: a liquid pump having a liquid inlet (15) and a liquid outlet (16), an air pump having an air inlet (26) and an air outlet (27), a mixing chamber (29), wherein the air outlet and the liquid outlet are in fluid communication with the mixing chamber, a dispensing channel (30). A first end of the dispensing channel is in fluid communication with the mixing chamber (29) and the second end forms a dispensing opening (31) for dispensing of foam. The dispensing channel (30) and the mixing chamber (29) are connected to each other via a constriction. The constriction is formed by an opening having a cross section which decreases towards the dispensing channel.

Abstract: A foam-forming assembly includes a housing having an air passage and a liquid passage, each ending in a mouth and being in communication with a dispensing passage having a dispensing opening, and a valve body which, in a rest position, covers the mouth of the liquid passage and the mouth of the air passage in a sealing manner in order to prevent a flow from the liquid passage and the air passage to the dispensing passage. During dispensing, the valve body opens the mouth of the liquid passage and the mouth of the air passage in order to allow mixing of air and liquid to take place in the dispensing passage. The mouth of the air passage is substantially annular, and the air passage includes a pressure balance chamber to divide the air pressure substantially equally over the substantially annular mouth.

Abstract: A foam-forming assembly includes a housing having an air passage and a liquid passage, each ending in a mouth and being in communication with a dispensing passage having a dispensing opening, and a valve body which, in a rest position, covers the mouth of the liquid passage and the mouth of the air passage in a sealing manner in order to prevent a flow from the liquid passage and the air passage to the dispensing passage. During dispensing, the valve body opens the mouth of the liquid passage and the mouth of the air passage in order to allow mixing of air and liquid to take place in the dispensing passage. The mouth of the air passage is substantially annular, and the air passage includes a pressure balance chamber to divide the air pressure substantially equally over the substantially annular mouth.

Abstract: The present invention relates to a dispensing assembly to dispense a foam, comprising: a liquid pump having a liquid inlet (15) and a liquid outlet (16), an air pump having an air inlet (26) and an air outlet (27), a mixing chamber (29), wherein the air outlet and the liquid outlet are in fluid communication with the mixing chamber, a dispensing channel (30), wherein a first end of the dispensing channel is in fluid communication with the mixing chamber (29) and the second end forms a dispensing opening (31) for dispensing of foam, the dispensing channel (30) and the mixing chamber (29) are connected to each other via a constriction, characterized in that the constriction is formed by an opening having a cross section which decreases towards the dispensing channel.

Abstract: The invention provides a dispensing assembly to dispense a foam, comprising: •—a double cylinder element (2) mounted or to be mounted in an opening of a container (100), comprising a liquid cylinder (3) and an air cylinder (4), wherein the liquid cylinder has a smaller diameter than the air cylinder, and wherein the liquid cylinder and the air cylinder are arranged substantially concentrically, and •—a piston assembly (10) comprising a liquid piston (11) and an air piston (12) for reciprocal movements in the liquid cylinder and air cylinder, respectively, and a common operating part for operating the liquid piston and air piston, • wherein a liquid pump chamber (14) is at least delimited by the liquid cylinder and the liquid piston, said liquid pump chamber having a liquid inlet (15) and a liquid outlet (16), • wherein an air pump chamber (25) is at least delimited by the air cylinder, the air piston and the liquid piston, said air pump chamber having an air inlet (26) and an air outlet (27), • wherein the pi

Abstract: The invention provides a foam-forming assembly, comprising: a housing having an air passage and a liquid passage, each ending in a mouth and being in communication with a dispensing passage having a dispensing opening, and a valve body which, in a rest position, covers the mouth of the liquid passage and the mouth of the air passage in a sealing manner in order to prevent a flow from the liquid passage and the air passage to the dispensing passage, and which, during dispensing, opens the mouth of the liquid passage and the mouth of the air passage in order to allow mixing of air and liquid to take place in the dispensing passage, wherein the mouth of the air passage is substantially annular, and wherein the air passage comprises a pressure balance chamber to divide the air pressure substantially equally over the substantially annular mouth.

Abstract: The present invention provides a foam dispensing assembly comprising a liquid piston pump, comprising a liquid cylinder and a liquid piston delimiting a liquid pump chamber, and a liquid inlet and outlet, an air piston pump comprising an air cylinder and an air piston delimiting an air pump chamber, and an air inlet and outlet, a common actuation button for actuation of said liquid pump and said air pump, a dispensing channel for mixing and dispensing liquid and air pumped by said liquid and air pump, respectively, and a securing collar for attachment of said dispensing assembly to a container. The invention is characterized in that said air cylinder is formed by a cylindrical skirt of said actuation button, and said air piston is at least partially formed by a cylindrical extension of said securing collar and in that said air chamber at least partially surrounds said liquid chamber.

Abstract: The present invention provides a foam dispensing assembly comprising a liquid piston pump, comprising a liquid cylinder and a liquid piston delimiting a liquid pump chamber, and a liquid inlet and outlet, an air piston pump comprising an air cylinder and an air piston delimiting an air pump chamber, and an air inlet and outlet, a common actuation button for actuation of said liquid pump and said air pump, a dispensing channel for mixing and dispensing liquid and air pumped by said liquid and air pump, respectively, and a securing collar for attachment of said dispensing assembly to a container. The invention is characterized in that said air cylinder is formed by a cylindrical skirt of said actuation button, and said air piston is at least partially formed by a cylindrical extension of said securing collar and in that said air chamber at least partially surrounds said liquid chamber.