Patent ID: 8607774

Claim:
A vortex ring producing gun comprising: a body defining a first interior volume; a moveable element positioned in fluid communication with the first interior volume; a nozzle assembly coupled with the body at an opening of the body, the nozzle assembly comprising: a nozzle comprising a nozzle opening located distal from the body, wherein the nozzle opening is configured to produce a vortex ring and connect the first interior volume to an exterior of the vortex ring producing gun; and one or more fluid entrapment chambers within the nozzle assembly between the body and the nozzle opening, wherein each fluid entrapment chamber of the one or more fluid entrapment chambers is formed by a pair of connecting ribs extending from an inner surface of the nozzle assembly toward the nozzle opening, and each fluid entrapment chamber of the one or more fluid entrapment chambers defines a separate interior volume in fluid communication with the first interior volume; and a joint ring configured to connect the nozzle assembly to the body, the joint ring comprising: at least one pressure venting slot configured to provide a fluid path between an interior of the nozzle assembly and the exterior of the vortex ring producing gun.