Salt-sand spreader with liquid injector

A spreader for particulate material from a storage tank of a mobile vehicle moving in a forward direction including:

• means for metering the particulate material;
• means for entraining the particulate material in a rearwardly directed air stream and for discharging the particulate material at a rearwardly facing outlet from the means for entraining and in a rearward direction;
• means for determining the velocity of the particulate material-air stream as it moves through the means for entraining;
• means for sensing the forward speed of a mobile vehicle on which the means for entraining is mounted;
• and
• means for adjusting the particulate material-air stream velocity to substantially match the velocity of the particulate material to the forward velocity of the mobile vehicle, with the particulate material-air stream velocity being in a rearward direction opposite from the forward direction of the mobile vehicle.

A mobile spreader having a front and a rear, and used for spreading particulate material coated with a liquid coating as the mobile spreader moves at a velocity, comprising a supply of particulate material:

• a storage box mounted on the mobile spreader holding the supply of particulate material and having an opening at a rearward end;
• a housing mounted adjacent the opening at the rearward end of the storage box;
• laterally directed metering means for receiving particulate material from the storage box and metering a moving particulate material toward one side of the housing;
• a mixing chamber for receiving the particulate material from the housing through a conduit that directs particulate material from the metering means into the mixing chamber, and a flow of air in said chamber for carrying the particulate material toward and through an outlet;
• a liquid applicator applying a liquid material to coat the individual particles to enhance a function of the particles when discharged;
• and
• a flow controller for adjusting the velocity of the flow of air such that the velocity of the particulate material moving through the outlet is substantially equal to the velocity of movement of the mobile spreader on which the chamber and applicator are mounted.