Patent ID: 8590816
Filing Date: 2013-11-26
Classification: B05B

Abstract:
1. A spray nozzle for spraying liquid under high pressure, comprising: a body having a tubular channel for channeling liquid to a downstream end portion thereof, the channel extending along a longitudinal axis; a slot for shaping a jet of liquid coming from the channel, the slot being formed by two approximately plane surfaces, the plane surfaces converging toward one another in a direction of the channel and being located on either side of a plane including the longitudinal axis of the channel; a dome connecting the downstream end portion of the channel and the slot, a length of the dome, measured parallel to the longitudinal axis, being less than 50% of a largest cross sectional transverse dimension of the channel as measured in a plane that is orthogonal to the longitudinal axis, the dome having a plane cross section that is symmetric relative to the longitudinal axis, the plane cross section being defined by a plurality of circular arcs including at least three circular arcs which successively extend from the downstream end portion of the channel and toward the slot and which have different radii extending from spaced centers located within the channel, a first of the at least three circular arcs extends from the downstream end portion of the channel and toward the longitudinal axis and has a first radius, a second of the three circular arcs extends between the first circular arc toward but spaced from the slot and has a second radius which is greater than the first radius, and a third circular arc extends between the second circular arc to the slot and has a third radius which is greater than the second radius, and wherein the first circular arc which extends from the downstream end portion of the channel has a radius which is equal to less than half of a smallest cross sectional transverse dimension of the channel, measured in a plane orthogonal to the longitudinal axis, and the third circular arc which extends to the slot has a radius greater than half the largest cross sectional transverse dimension of the channel, measured in a plane orthogonal to the longitudinal axis, whereby a size of the radii of the plurality of circular arcs increases for each circular arc provided between the first circular arc and the slot.