Patent ID: RE41267

Claim:
A device for dispensing precise amounts of dry particulate matter directly into a liquid carrier stream, the device comprising: a bin for holding a quantity of particulate matter; a conduit for transporting a stream of liquid carrier; a meter connected to the bin for controllably releasing a desired amount of the particulate matter from the bin into the conduit while disallowing entry of the liquid carrier to the bin, the meter including a rotor constrained to rotate within a housing to release particulate matter from the bin into the conduit, and an electric drive motor coupled to the rotor for rotation; a rotor rotation sensor; a controller adapted to automatically stop releasing the particulate matter when a desired amount of particulate matter has been released from the bin, the controller adapted to monitor a signal from the rotation sensor, determine, based upon said signal, when a desired amount of particulate material has been released, and then to stop applying power to the drive motor; and a portable structure upon which the bin, conduit and meter are mounted for transportation with particulate matter in the bin.