Trigger dispensing device for upside down operation

A trigger head for a dispensing device for a liquid product,

• wherein the dispensing device comprises a bottle having a bottle compartment for containing the liquid product, the trigger head being applicable to the bottle,
• wherein the dispensing device is usable in an “upright” configuration, in which the trigger head is placed above the bottle compartment, and in an “upside down” configuration, and
• wherein the trigger head comprises:
• a frame for supporting components, a pressure chamber for pressurizing the liquid product, a dispensing conduit for dispensing the liquid product to an external environment, a suction conduit for putting the bottle compartment in communication with the pressure chamber, an outlet conduit for putting the pressure chamber in communication with the dispensing conduit, a venting conduit for putting the bottle compartment in communication with the external environment, valve means for adjusting a flow of the liquid product from the suction conduit to the pressure chamber and from the pressure chamber to the outlet conduit, wherein the frame comprises a connecting portion for connecting to the bottle, and a venting tube projecting vertically from the connecting portion, and wherein the venting tube comprises a venting passage passing through a thickness of the venting tube;
• an attachment comprising:
• an attachment suction chamber in communication with the suction conduit;
• a multifunction chamber adapted to be put in communication with the venting conduit and provided with a multifunction passage which puts the multifunction chamber in communication with the bottle compartment;
• an auxiliary passage which puts the multifunction chamber and the attachment suction chamber in communication, placed under the multifunction passage in the “upright” configuration;
• and
• multifunction valve means operating in the multifunction chamber adapted
• in the “upright” configuration, to close a communication, through the multifunction chamber and the auxiliary passage, between the venting passage and the bottle compartment placed under the multifunction passage;
• and
• in the “upside down” configuration, to close a communication, though the multifunction chamber, between the multifunction passage and the venting passage, preventing a communication between the venting conduit and the bottle compartment placed above the multifunction passage.

An attachment made in one piece of plastic material for a trigger head of a dispensing device for a liquid product, comprising:

• at a top thereof, a connecting part comprising an annular attachment connecting wall peripherally delimiting an attachment compartment, and a base wall axially delimiting the connecting part;
• at a bottom thereof, a drawing attachment coaxial to an attachment axis, delimited by an annular drawing wall;
• an attachment suction chamber extending along an attachment suction axis, parallel to and spaced from the attachment axis, annularly delimited by an attachment suction wall, in connection at the bottom with the drawing attachment;
• a multifunction chamber extending along a multifunction axis, parallel to and spaced from the attachment axis, annularly delimited by a multifunction wall, in connection at the bottom with the drawing attachment and provided with a multifunction passage passing through the multifunction wall, wherein the multifunction chamber comprises a second multifunction segment;
• an auxiliary passage that puts the multifunction chamber and the attachment suction chamber in mutual communication at the bottom;
• a multifunction connecting tube delimiting an end portion of the second multifunction segment, the multifunction connecting tube being configured to engage a venting tube of a frame of the trigger head;
• and
• a suction connecting tube delimiting an end part of the attachment suction chamber, configured to engage a suction tube of the frame of the trigger head,
• wherein the annular attachment connecting wall, the multifunction connecting tube, and the suction connecting tube protrude from an inner surface of the base wall, into the attachment compartment, and
• wherein, with the multifunction connecting tube engaged to the venting tube, the attachment compartment is in air communication with the venting tube.