Abstract: The invention concerns a device for mixing and dose feeding a product of one or several components.This device comprises a mixing chamber 3 within which is freely mounted a static-type mixing member 7 which thereby can move within the chamber 3 along a predetermined path; this member is associated with return means 9 arranged to repel it in the direction S.sub.2 from the discharge toward the inlets of the chamber; when in motion during the product feed operation, the member 7 permits projecting product doses with high accuracy and without dispersion while also achieving thorough mixing of the product components.