System for distributing semisolid lubricant and method of controlling such a system

A system for distributing semisolid lubricant, comprising:

• a semisolid lubricant tank and a high pressure pumping system that intermittently feeds, during a lubrication cycle, at least one first duct, the at least one first duct feeding a plurality of distributors adapted to sort the semisolid lubricant to a plurality of users,
• a controlled suction/delivery device fluidly associated with said first duct, the controlled suction/delivery device having an accumulator cylinder configured for controlled suction/delivery of a part of the semisolid lubricant conveyed by said first duct,
• the controlled suction/delivery device being configured to suck a volume of semisolid lubricant from said first duct during a step of inactivity of the pumping system on said first duct and thereby fill a chamber of the accumulator cylinder, and then dispense the previously suctioned semisolid lubricant stored in the chamber of the accumulator cylinder and thereby introduce the previously suctioned semisolid lubricant in said first duct during a subsequent step of activity of the pumping system on said first duct,
• the controlled suction/delivery device comprising a pressure sensor functionally associated with said first duct and configured to control the suction/delivery device in its phases of sucking and of introducing the semisolid lubricant in said first duct based on pressure read by the sensor, wherein the accumulator cylinder is actuated by a movement system, wherein the movement system is a pneumatic cylinder.