Particle delivery gun which imparts a rotary motion to the flow of gas passing

摘要

A gas-driven particle delivery instrument is provided. The device includes various elements which enhance the utility and efficacy of the device, including a rotational flow element, a turbulent flow element, a flow constriction element, and combinations thereof. The rotational flow element is arranged within the acceleration passage and serves to impart a rotary motion in a flow of gas passing through prior to, or after entry of that gas flow into an acceleration chamber that forms a downstream part of the acceleration passage. It therefore imparts a rotary motion in a flow of gas passing from the upstream gas chamber into the mixing chamber to form a vortex within the mixing chamber.