Patent ID: 7097116

Claim:
A rotating underground sprinkler with a pop-up head, consisting of a corresponding underground casing, comprising an upper cylindrical part having a first diameter and a lower cylindrical part having a second diameter, a cover on a top portion of said upper cylindrical part and fixed to the pop-up sprinkler head operably coupled to a piston, said piston is operable as a result of water pressure and displaced proportionally to the water pressure against the resilience force of a permanent draw-spring, comprising: a draining and cleaning means disposed in an intersection of said upper cylindrical part ( 230 ) and said lower cylindrical part ( 231 ) for preventing the jamming of the sprinkler; and wherein the draining and cleaning means are openings ( 233 , 234 and 235 ) provided on a beveled surface of the intersection of the upper cylindrical part and the lower cylindrical part and radially arranged relative to one another at 120°; a cover-nut ( 25 ) disposed within said casing at said intersection of said upper cylindrical part and said lower cylindrical part for securing the piston therethrough, said piston having a smooth tubular cylindrical body; wherein the cover-nut includes a cylindrical body ( 250 ) with a circular plan provided with a superficial rib ( 251 ) with bevels ( 252 , 253 ) on two sides, and further comprising projecting arcuate wedge-shaped teeth ( 254 ) on a peripheral edge and each positioned relative to one another at 120°, and further comprising a central passage ( 255 ) for the piston ( 16 ), and a circumscribed circular housing ( 259 ) on the inside part of the cover nut for storing a leaktight joint part ( 26 ) having a profile suitable for fitting to said piston ( 16 ), and a doughnut-shaped housing ( 258 ) on the outside part of the cover nut for a joint for fitting to the lower cylindrical part ( 230 ); an inlet filter ( 22 ) disposed on a lower end and within said lower cylindrical part; a pair of omega-shaped elements ( 17 ) for arranging and adjusting the spray arc of the sprinkler each operably attached to a neck ( 165 ) of the piston ( 16 ) and includes an annular body with a pair of divergent branches ( 171 ), ( 172 ), wherein said sprinkler further comprises a lower sector and an upper sector, and a jet stream outlet on said upper sector; a stop ( 29 ) made of stainless steel wire having an elongate body and is coupled to said lower sector ( 12 ) of the sprinkler, said stop configured to engage said pair of divergent branches of said pair of omega-shaped elements; a non-detachable stainless steel shaft ( 3 ) for assembling together the lower ( 12 ) sector and said upper ( 11 ) sector of the sprinkler; an adjustable jet breaker apparatus comprising a jet breaker screw operably attached to said upper sector ( 11 ); and, said jet breaker apparatus further comprising a single-piece, plastic, reinforced diffuser blade ( 7 ) operably attached on said stainless steel shaft without counterweights for breaking the jet stream.