Patent ID: 6454017
Filing Date: 2002-09-24
Classification: A62C

Abstract:
An upright-type fire protection spray mist nozzle, comprising:base defining an orifice, with an orifice axis, through which fire-retardant fluid can flow; an inlet section having an upstream end and defining a conduit for flow of fire-retardant fluid along said orifice axis and leading to an upstream end of said orifice; and a diffuser element positioned coaxially downstream of said orifice, said diffuser element defining an impingement surface that is at least substantially imperforate in an axial direction and positioned for impingement by a stream of fire-retardant fluid flowing from said orifice in a stream direction along said axis, said impingement surface having a shape and contour for generation of a spray mist and comprising: a central conical shape surface region extending generally toward said orifice, with an apex portion disposed along said axis, a peripheral edge disposed generally radially outward from said conical shape surface region, and a concave, toroidal surface region generally between said conical shape surface region and said peripheral edge.