Device for depositing a precise quantity of product

A distribution assembly for product in liquid or dough or foam form, for delivering and depositing a precise quantity of product on a support (9), where the distribution assembly comprises:

• a cylinder, having an axis A;
• a piston, which can be displaced in the cylinder by at least one actuator;
• a path for taking in the product;
• an ejection head, which comprises a slide valve movable between a first position (P1) called closed and a second position (P2) called open, and an outlet nozzle;
• a preparation chamber arranged in the cylinder between the piston and the ejection head;
• and
• at least one transfer passage, connecting, selectively according to the position of the slide valve, the preparation chamber with the outlet nozzle;
• where the distribution assembly is arranged such that when the cylinder comes towards the support, the physical contact with the support moves the slide valve from the first position to the second position and triggers delivery of the product, pushed by the piston, via the transfer passage, and when the piston arrives at the forward end of range, the piston moves the slide valve from the second position to the first position and thus closes the passage for the product via the transfer passage, and where the first and second positions are stable.