Patent ID: 8555924
Filing Date: 2013-10-15
Classification: E03F,F15D,Y10T

Abstract:
1. A vortex flow control device comprising a housing defining a vortex chamber, the housing comprising: oppositely disposed end walls, each end wall having at least one free edge; an outer wall extending about an axis and disposed between the end walls, the outer wall comprising a curved portion which extends around the axis, one end of the curved portion adjoining a planar portion which extends in a tangential direction with respect to the axis to a first free edge, and the other end of the curved portion adjoining a terminal portion which extends in a direction towards the planar portion and terminates at a second free edge; an outlet from the housing disposed in one of the end walls; and a rectangular inlet to the housing defined in the outer wall by the free edges of the end walls and by the second free edge and the first free edge, the inlet being configured so that fluid entering the vortex chamber through the inlet induces a circulating flow within the vortex chamber about the axis, wherein the terminal portion is directed away from the circulating flow in the direction towards the first free edge, whereby turbulence is induced in the region of the inlet by fluid entering the vortex chamber through the inlet, wherein the terminal portion is selectively arrangeable with respect to the planar portion at an orientation of at least three orientations, being: a neutral orientation between the first inclined orientation and the second inclined orientation, wherein the neutral orientation results in the terminal portion being arranged perpendicularly with respect to the planar portion and does not intrude into the vortex chamber or protrude away from the vortex chamber, wherein the orientation of the terminal portion with respect to the planar portion is defined by an angle not less than 85° when the terminal portion is arranged in the first inclined orientation and not more than 95° when arranged in the second including orientation.