Abstract: An improved gear drive sprinkler has a pop-up spray head adapted for adjustable part-circle or full circle operation to deliver irrigation water over a selected terrain area. The sprinkler includes a pop-up riser; a gear drive transmission mounted within the riser includes a water-driven turbine for rotatably driving a speed reduction gear train, which in turn rotatably drives the spray head. A reverse assembly includes an upper trip unit defining an individually adjustable pair of end trip stops, and a lower shift mechanism including a shiftable director plate having first and second sets of angularly oriented jet nozzles for respective alignment with turbine jet ports for respectively driving the water-driven turbine and the gear train in a forward-drive or a reverse-drive direction. The upper trip is coupled to the director plate by an elongated trip rod which shifts the director plate between forward-drive and reverse drive positions.

Abstract: A self-cleaning water filter assembly including a body having inlet and outlet portions and a filter housing portion defining a cavity disposed therebetween so that water entering the inlet must flow through an inner surface to an outer surface of a filter then to the outlet. A piston disposed concentrically within the filter is biased in an upward resting position by a spring in the absence of water pressure. A scraper extends radially from a piston sidewall and into contact with the inner surface of the filter. Apertures extend through the sidewall and into a central bore extending through a bottom end of the piston. In the presence of water pressure, the piston is forced downwardly into the cavity, and the scraper and apertures cooperatively dislodge and flush filtered particulate matter from the housing. As water pressure is reduced, the piston is biased into its upward resting position, dislodging and flushing filtered particulate matter again.

Abstract: A deep root watering unit is provided for improved irrigation and aeration of tree roots and the like, particularly with respect to trees planted in non-native or hostile environments such as planters, tree wells in paved areas, clay soils and arid climates. The root watering unit includes a porous sleeve extending downwardly from an upper atrium housing, wherein the watering unit is adapted for in-ground installation adjacent to tree roots or the like. The atrium housing defines a hollow atrium chamber equipped with internal support members for mounting different types of irrigation water dispensing devices, such as a bubbler head or emitter device, for delivering irrigation water downwardly into the porous sleeve and further there through to the adjacent plant roots. A cap grate is removably mounted over the top of the atrium housing to accommodate access to the atrium chamber and the selected water dispensing device mounted therein.

Abstract: A pop-up sprinkler is provided with an internally mounted and upwardly open debris cup for capturing debris such as dirt and pebbles falling into the sprinkler, to prevent such debris from contacting and interfering with an internally mounted rotary drive mechanism. The sprinkler includes a housing or case carrying a pop-up riser with a spray head thereon for projecting a stream of irrigation water over surrounding terrain and vegetation. The rotary drive mechanism includes a water-driven element such as a turbine coupled by a reduction gear unit or the like for rotatably driving the spray head in a manner sweeping the projected water stream over the surrounding terrain and vegetation. The debris cup is mounted within the sprinkler case generally at a lower end of a nozzle passage formed in the riser, and generally overlying the water-driven element, in a position to capture and retain debris falling into the sprinkler case through the nozzle passage.