Patent ID: 6264117
Filing Date: 2001-07-24
Classification: B05B,Y10S

Abstract:
Spray nozzle for pop-up underground sprinkler comprising a main fixed body suitable to receive the water flow coming from the sprinkler and to deliver it toward the outside under form of pre-established rate spray and a revolving ring nut associated with the aforesaid main body in order to allow the adjustment of the spray angle, said main body being made up of an annular lower portion that is fixable to the upper end of the mobile part of the sprinkler and communicates with the orifice of output of the same, an intermediate cross wall provided with a distribution of holes for the flow of the water, an upper annular portion, a hub portion placed coaxially inside said upper annular portion and a covering cap fixed over said hub portion, said ring nut being in turn made up of an annular wall that is turningly engaged with said upper annular portion of the main body and of an upper cross wall that surrounds said hub portion thus leaving around it an annular passage for the outflow of water from the area defined between said hub portion and said upper annular portion of the main body and is further interposed between the top of said annular upper portion and said covering cap of the main body in order to define with the latter an adjustable radial passage shaped as a scroll for the formation and the outflow of a spray of water with adjustable angle, characterised in that the upper cross wall of the revolving ring nut has a bottom cavity shaped as a scroll that defines an accumulation chamber in which the flow of water in the area comprised between the hub portion and the upper annular portion of the main body is subject to compression for the formation of a uniform output spray at said adjustable radial passage.