Patent ID: 6890246

Claim:
A dry-ice blast device comprising: an air compressor, an air flow path for guiding an air flow generated by the air compressor to a nozzle, and a dry-ice particle feeder for supplying dry-ice particles into the air flow; wherein the air compressor is of a low pressure type having a delivery pressure of 1.2-2.5 atm; and wherein the dry-ice particle feeder supplies the dry-ice particles into the air flow at a position upstream along the air flow path from the nozzle; wherein the dry-ice particle feeder includes a hopper having a bottom opening and storing the dry-ice particles, and a supplier for causing the dry-ice particles to be discharged through the bottom opening and introduced into the air flow path through a branching pipe portion which transversely branches from the air flow path for allowing gravitational fall of the dry-ice particles and is located out of alignment with the bottom opening; wherein the supplier includes a movable member having a plurality of accommodation portions for successively coming into communication with the bottom opening of the hopper and the pipe portion, the movable member constantly preventing the bottom opening of the hopper from directly communicating with the branching pipe portion.