Patent ID: 8919679

Claim:
An air cannon system, comprising: a plurality of air cannons, the air cannons comprising: an air cannon body including a cylindrical body partitioning an air chamber and an end plate provided at the cylindrical body; compression means that is provided at the air cannon body and reduces a volume of the air chamber; and an ejection port formed in the end plate and gradually expanding from an inner-side opening end of the ejection port toward an outer-side opening end of the ejection port, the outer-side opening end being larger than the inner-side opening end, so as to detach an air flow from the ejection port, and air inside the air chamber being ejected as air vortexes from the ejection port by driving the compression means, while maintaining a shape of the air vortexes, wherein the ejection port formed in the end plate is disposed on an axis of the cylindrical body, wherein the air vortexes comprise air vortex rings, wherein an air cannon of the plurality of air cannons is disposed in relation to an other air cannon of the plurality of air cannons such that the air vortexes discharged from the air cannon collide with the air vortexes discharged from the other air cannon at a predetermined position, and wherein a periphery of the inner-side opening end in the air chamber is formed in a flat-plate shape.