Patent ID: 8567643

Claim:
A device to deliver fluid products, comprising a plurality of canisters, each one able to contain a predetermined fluid, and connected to an associated delivery unit, each delivery unit comprising a bellows pump, alternatively drivable between a condition in which it sucks in the fluid from a corresponding canister and a condition in which it delivers the fluid, said delivery device also comprising actuator means able to cooperate directly or indirectly with each bellows pump in order to drive it between said suction condition and said delivery condition, said actuator means comprise an actuation cam element, rotatable alternatively in two opposite directions of rotation, and having a profile able to cooperate during its own rotation with the bellows pump, so as to define in a first direction of rotation said suction condition, and in the opposite direction of rotation said delivery condition, wherein said suction condition and said delivery condition are defined respectively by a rotation of 180° of the actuation cam element in the first direction of rotation and by a subsequent rotation of 180° in the opposite direction of rotation, wherein the actuation cam element comprises a shaped portion able to define, during its own rotation, an operating condition of extra travel with respect to positions which are rotated by 180° with respect to each other, wherein the bellows pump delivers predetermined fractions of fluid to compensate for operating and/or working deviations in the delivery capacity of the delivery unit.