Patent ID: 7841419

Claim:
A fire extinguishing or explosion suppression device comprising, a chamber and a nozzle defining a discharge pathway from the chamber, the chamber having an inlet for pressure-driven introduction of a liquid into the chamber, the chamber being shaped so that a gas already contained in the chamber before the introduction of the liquid is commenced is entrained into the liquid during the pressure driven introduction of the liquid such that a mixture of the liquid and the gas is discharged through the nozzle to create a mist for extinguishing a fire or suppression of an explosion, wherein the chamber is defined by a surface having a convex surface portion and a concave surface portion, each of the surface portions having the shape of a segment of a sphere, the convex surface portion and the inlet being positioned so that the liquid is directed onto the convex surface portion when the liquid is introduced into the chamber through the inlet, whereby to increase turbulence within the chamber, and wherein the nozzle is located at the concave surface portion and the convex surface portion directs liquid towards the nozzle.