Abstract: A rotary sprinkler in accordance with an embodiment of the present disclosure includes a riser with a nozzle assembly rotatable mounted thereon. The nozzle assembly includes a pressure regulator and flow control element.

Abstract: A cleaning apparatus 1 includes: a pivot rotary shaft 8 attached with a nozzle 3; a first motor 14 for revolving and rotating the pivot rotary shaft 8 via an inner tube 7 and bevel gears 11 and 12; a second motor 16 for solely rotating an outer tube 15; and a control device 18 for controlling the operation of both the motors 14 and 16. The outer tube 15, and the pivot rotary shaft 8 and the nozzle 3 are operated together via the bevel gears 11 and 12. The first motor 14 is operated with the cleaning fluid W being sprayed from the nozzle 3.

Abstract: A nozzle adjustment member for a sprinkler is revealed. A plurality of nozzle tubes aligned in at least one row is positioned on a wall of a hollow pipe. A top end of the nozzle tube is projecting to an outside of the hollow pipe. At least one pivot support is disposed on the outside of the hollow pipe. Each pivot support is pivoted with an adjustment piece having a plurality of guiding openings. The guiding openings are positioned over the plurality of nozzle tubes correspondingly. A nozzle cover is connected with the outside of the hollow pipe for covering the adjustment piece. A plurality of long through holes for mounting the corresponding nozzle tubes is arranged at the nozzle cover. Around a pivot hole, the adjustment piece swings so as to drive the plurality of nozzle tubes moving at an angle and different water distribution patterns are provided.

Abstract: A single or dual sided direction-controllable sprinkler comprises two rotatable trigger portions slidably disposed on a main body. When one trigger portion is limited by a fastener, the two trigger portions have the same rotational position, and when the one trigger portion is not limited by the fastener, the rotational positions of the two trigger portions are controlled independently. The fastener is selectively connected to allow the user to selectively control one of the trigger portions or both of the trigger portions together so that various water sprinkling modes are available.

Abstract: A sprinkler base is provided comprising a platform component and a flow component. The flow component may have a tubular body encompassing a flow passage. A fluid inlet and a first fluid outlet may communicate with each other via the flow passage. The first fluid outlet may be arranged to receive a sprinkler head extending perpendicularly to an axis of the tubular body. The platform component may include mounting means to hold the tubular body of the flow component. Restraint means may be provided to retrain the tubular body against rotation about the axis of the tubular body relative to the platform component in one of a plurality of rotational positions.

Abstract: A nozzle adjustment member for a sprinkler is revealed. A plurality of nozzle tubes aligned in at least one row is positioned on a wall of a hollow pipe. A top end of the nozzle tube is projecting to an outside of the hollow pipe. At least one pivot support is disposed on the outside of the hollow pipe. Each pivot support is pivoted with an adjustment piece having a plurality of guiding openings. The guiding openings are positioned over the plurality of nozzle tubes correspondingly. A nozzle cover is connected with the outside of the hollow pipe for covering the adjustment piece. A plurality of long through holes for mounting the corresponding nozzle tubes is arranged at the nozzle cover. Around a pivot hole, the adjustment piece swings so as to drive the plurality of nozzle tubes moving at an angle and different water distribution patterns are provided.

Abstract: A nozzle assembly for generating fluid jets, such as self-spinning fluid jets. A nozzle body includes a cylindrical nozzle cavity, an inlet, an outlet, and a tubular nozzle rotor assembly positioned with respect to the nozzle cavity. The nozzle rotor assembly can have a ball end and a tubular end and a central fluid passage routed through the nozzle rotor assembly. A fluid swirl enhancer forms communication with the inlet. A replaceable nozzle seat forms communication with the ball end of the nozzle rotor assembly and with the outlet. The ball end of the nozzle rotor assembly pivots, oscillates and rotates against the nozzle seat when pressurized fluid flows through the nozzle assembly.

Abstract: A cleaning apparatus is provided that includes a first nozzle configured to direct a cleaning jet towards a contaminated surface at a pressure sufficient to remove contaminants from the surface. At least one second nozzle is configured to direct a rinsing jet towards the contaminated surface to remove cleaning fluid therefrom, wherein the rinsing jet is directed at a pressure sufficient to isolate the cleaning jet from an ambient environment.

Abstract: A sprinkler includes a hollow shaft to which a positioning part, a gear casing, a pipe are respectively connected to the hollow shaft. The positioning part and the pipe are respectively connected to a first end support and a second end support of a base. The positioning part has multiple grooves defined in a tubular portion thereof. A hollow positioning rod has a ratchet portion which is resiliently formed thereto. The hollow positioning rod is rotatably mounted to the hollow shaft and the ratchet portion is engaged with the grooves of the positioning part. The hollow positioning rod has a toothed portion which is engaged with an output gear of the gear casing. The gear casing is driven by a hydraulic power so as to swing the pipe periodically. The resilient ratchet portion allows the gear casing and the pipe to swing easily, and no metal spring is required.

Abstract: A sprinkler structure includes a base with a rotatable stripe-shaped pipe and spraying pipes installed on the stripe-shaped pipe. The stripe-shaped pipe has an end connected to the base through a hollow shaft which has an outlet pipe, and the other end connected to the base through a pipe plug. A water fetching device is installed at an end of the base for driving the stripe-shaped pipe to rotate and includes a sleeve sheathed on the hollow shaft. A water fetching target is installed at an upper end of the sleeve and near the outlet of an outlet pipe. The base has an inlet pipe interconnected with the hollow shaft, the outlet pipe and the spraying pipe, and further has a conversion device for controlling the water fetching device to rotate in a forward or reverse direction.

Abstract: A rotary sprinkler including a rotatable nozzle turret with automatic matched precipitation to an arc of rotation, a nozzle purge feature, and/or a flow shut off valve coupled to a variable flow nozzle outlet.

Abstract: A sprinkler head with plural selectable nozzles includes a sprinkler body having inlet and outlet bores aligned along a first axis; a nozzle magazine rotatably supported on the sprinkler body, the nozzle magazine carrying at least two nozzles and provided with at least one shut-off surface portion located between the at least two nozzles. The nozzles are selectively rotatable into an operative position between the inlet and outlet bores, the nozzle magazine being rotatable about a second axis angularly offset from the first axis.

Abstract: A sprinkler head includes a first housing carrying a center stem having an inlet at an upstream end and an outlet at a downstream end. A second housing is supported within the first housing and encloses a nozzle and a pressure regulator in axially-aligned relationship, defining a flowpath between the inlet and an orifice of the nozzle. The second housing is normally biased to a retracted position but is moveable to an extended position relative to the first housing and to the center stem. A surface of the pressure regulator cooperates with the outlet of the center stem as the second housing moves relative to the first housing to regulate pressure to the nozzle orifice.

Abstract: A sprinkler can include a turbine, a nozzle, a gear drive and a reversing mechanism. The gear drive and the reversing mechanism rotatably couple the turbine and the nozzle. The gear drive can shift a direction of rotation of an output stage that is coupled to the reversing mechanism. The reversing mechanism can include a shift member coupled with the gear drive.

Abstract: A rotatable apparatus for a water monitor. A flange assembly has a stationary portion, a rotatable portion disposed in the stationary portion, and a duct extending through the stationary and rotatable portions. A water-driven turbine has a rotatable water wheel in communication with the duct and an output shaft coupled to the water wheel. Fluid flowing through the duct causes the water wheel to rotate, the rotation of the water wheel causing the output shaft to rotate. An output crank, a first linkage, a rocker arm, and a second linkage comprising a first linkage member and a second linkage member are operable by the output shaft to convert the rotating motion of the output shaft to an oscillatory motion. Fluid exiting the duct is distributed by the rotatable portion in a determinable oscillatory pattern.

Abstract: The present subject matter provides a dishwasher appliance and a spray assembly for the same. The spray assembly includes a rotatable spray member, a biasing mechanism for rotating the spray member in a first rotational direction, and a plurality of nozzles mounted to the spray member. The plurality of nozzles is configured for directing wash fluid out of the spray member. The spray member rotates in a second rotational direction when wash fluid flows out of the plurality of nozzles.

Abstract: A viscosity driving device for a lifting buried spraying head includes a cylindrical case (2), a filter (3) provided in the lower end of the case (2), and a spraying head driving unit disposed inside the case (2). The spraying head driving unit is connected with a spraying head positioned on the top end of the case (2) by means of a connecting shaft, and the spraying head driving unit drives the spraying head to rotate and spray water. The spraying head driving unit comprises a tangential flow generator (4) and a hydraulic rotator (5), and the hydraulic rotator (5) rotates under the action of viscosity of rotating water generated by the tangential flow generator (4) to drive the spraying head to rotate and spray water.

Abstract: An irrigation sprinkler canister seal comprising a flanged screw having a threaded rod and a circular flange extending perpendicular to the rod. The seal further includes a plug piece having a threaded bore adapted to receive the threaded rod, and further including a continuous frusto-conical surface extending around an elongate axis of the plug piece, the frusto-conical surface being configured to form a circumferentially continuous fluid seal against a cylindrical rim of a cylindrical bore.

Abstract: A sprinkler head for an embedded sprinkler includes a base having a adjust device arranged to an upper portion thereof and an inlet pipe formed to a lower portion thereof. The inlet pipe has a lateral outlet and a receiving chamber. A nozzle is received to the receiving chamber. A gap is formed between the nozzle and the receiving chamber so as the nozzle can be easily removed. A lower toothed ring indirectly rotated by the adjust device is arranged to a bottom of the inlet pipe. Angle between a flexible adjusting sheet extending from the lower toothed ring and a fixed adjusting sheet extending from a bottom of the base can be changed. A sleeve is arranged to the inlet pipe to receive an axial tube of a sprinkler so as to oscillate clockwise and counterclockwise with a driving shaft of the sprinkler.

Abstract: A rotor nozzle for a high-pressure cleaning appliance is provided. The rotor nozzle has a housing, which comprises at least one inlet opening tangentially, and which is provided in a front wall with a pan-shaped depression with a central opening. A nozzle body is arranged in the housing and supported with a spherical end in the pan-shaped depression. A longitudinal axis of the nozzle body is inclined to the longitudinal axis of the housing, it being possible for liquid in the housing to be caused to rotate about the longitudinal axis, and the nozzle body rotating together with the rotating liquid. In order to reduce flow losses in the rotor nozzle, without the operation of the rotor nozzle (in particular, start-up behavior of the nozzle body) being noticeably impaired, the nozzle body is provided with an outer contour deviating from the circular shape in a rear end area.

Abstract: A sprinkler includes a turbine, a nozzle, a gear train reduction and a reversing mechanism that rotatably couples the gear train reduction and the nozzle. The gear train reduction includes an input stage and a planetary gear drive output stage that includes a first portion of the reversing mechanism. A second portion of the reversing mechanism is located outside of the gear train reduction. The second portion of the reversing mechanism includes a pair of arc tabs. At least one of the arc tabs is adjustable to establish an arc of coverage of the sprinkler when the water flowing past the turbine causes the gear train reduction and the reversing mechanism to oscillate the nozzle back and forth between a pair of arc stops. The arc stops are defined by the locations of the arc tabs. The input stage of the gear train reduction includes a mechanism that allows manual rotation of the nozzle between the arc stops without having to back drive the gears in the input stage.

Abstract: A magnetically driven irrigation sprinkler is disclosed with a magnetic drive mechanism for rotating a fluid outlet relative to a fluid inlet. In one form, the drive mechanism includes a permanently polarized magnet and an electromagnet.

Abstract: Providing a flush bowl capable of discharging a planar shower-like water discharge flow in a wide range while changing the water discharge trajectory is directed. The shower device according to an embodiment of the invention is a shower device including: a water discharger including a plurality of water discharge ports; a rotator including a channel at its center; a coupling section coupling the inside of the water discharger to the channel of the rotator; a receiving section receiving the rotator; a driving mechanism configured to rotate and revolve the rotator in the receiving section; and a decelerating section provided inside the water discharger.

Abstract: A variable range sprinkler apparatus includes a sprinkler portion, a bypass unit housing a plurality of valves, and a water inlet portion. The sprinkler portion of the apparatus, which may be a rotary sprinkler unit, is attached to the bypass unit, and the bypass unit is coupled to the water inlet portion. Inside the bypass unit is a plurality of valves, at least one of which is adjustable, that are designed to open a water passage in the bypass unit.

Abstract: An irrigation sprinkler includes an outer case and a riser extensible from the outer case by water pressure and normally in a retracted position. A nozzle is rotatably mounted at an upper end of the riser. A turbine is mounted in the riser for rotation by water entering a lower end of the riser. A gear train reduction is mounted in the riser. A gear driven coupling mechanism mounted in the riser couples the gear train reduction and the nozzle. A pressure regulator valve is located inside a nozzle turret of the sprinkler and includes a valve member that is pivotably mounted between the gear train reduction and the nozzle.

Abstract: A speed limiting mechanisms for turbine-driven fluid distribution apparatus usable with compressible fluid such as compressed air and incompressible fluid such as water. In one form, a flow restrictor is located in the turbine discharge flow path, with the turbine discharge port area selected in relation to the turbine inlet port area according to the desired turbine speed with compressed air. In another form, the incoming fluid flows downstream along the surface of the turbine stator, and is then diverted to enter the rotor chamber in the proper direction. A bleed area on the stator which permits a portion of a compressible fluid which has expanded as it flows along the stator surface to flow to bypass the turbine rotor.

Abstract: A rotary impingement cleaning apparatus is configured for use in sanitary environments with a minimum of components to enable easy inspection and cleaning. The components of the cleaning apparatus are formed to fit relatively loosely to one another and promote self flushing and self drainage of cleaning liquid. A stator is mounted within a housing for diverting the flow of the pressurized cleaning liquid from axial to angular to impinge and rotationally drive a rotator stem or a rotor. The rotator stem or rotor causes an elbow to rotate around the vertical axis and a number of nozzles mounted to a nozzle housing to rotate around the horizontal axis.

Abstract: A sprinkler has a hollow outer case and a riser vertically reciprocable within the outer case through an upper end thereof. A nozzle is mounted at an upper end of the riser. A body cap fits over the upper end of the outer case and retains the riser. The body cap has a plurality of circumferentially spaced vertical ribs that connect a reduced diameter upper portion of the body cap with an enlarged lower portion of the body cap. An elastomeric cover extends over at least the reduced diameter upper portion of the body cap and at least a portion of the ribs.

Abstract: A sprinkler includes a nozzle and a cover configured for enclosing the nozzle. A hydraulically actuated mechanism supports the cover above the nozzle for reciprocation relative to the nozzle between a lower closed position and a raised open position.

Abstract: A flow regulator for use with a lawn sprinkler. The apparatus includes an impeller, a regulator portion and a nozzle regulator portion. The sprinkler is configured to regulate the delivery of water according to the shape of the area to be irrigated, so that water is not wasted on adjacent areas which do not require irrigation.

Abstract: An oscillating sprinkler head transmission for alternately driving an output shaft and sprinkler head nozzle to oscillate it with spring bias being provided to prevent the transmission from being placed in an inoperative position, where the sprinkler head is not oscillated.

Abstract: In a preferred embodiment of the present invention a sprinkler is provided, having a first shaft coupled to a drive mechanism and a grooved deflector. A second shaft is disposed within the first shaft, coupled to a water flow adjustment mechanism and an adjustment region on the top of the deflector. The first shaft transfers rotational movement from the drive mechanism to a grooved deflector on the top of the sprinkler. The second shaft rotates with the first shaft during normal operation due to a friction clutch within the sprinkler. When the user desires to adjust the water flow (i.e., the radius of the water), the friction of the clutch can be overcome by rotating the second shaft, increasing openings of flow passages within the sprinkler body. In this respect, flow adjustments can be made from the top of the sprinkler while the deflector rotates.

Abstract: The invention relates to a rotor nozzle, in particular for high-pressure cleaning devices, having a nozzle housing which has an inlet opening at its axially one end and an outlet opening at the other end for a fluid, in particular water, as well as having a rotor which is arranged in a swirl chamber of the nozzle housing, which is supported at a bearing at its front end facing the outlet opening, which can be at least partly flowed through by the fluid, which can be set into rotation about a longitudinal axis of the nozzle housing by fluid flowing into the swirl chamber and is inclined toward the longitudinal axis at least in the rotated state.

Abstract: A riser seal cartridge for an irrigation sprinkler. The cartridge is formed of a rigid self support shell, and a sealing member formed of a resilient material covering the shell in areas which provide the seal. The sealing member includes a first portion which seals the top end of the sprinkler body, a second portion which seals an outer surface of the riser, a third portion which connects the first and second portions, and a fourth portion extending from the third seal portion which provides a seal for the support shell lower end portion. The first seal portion provides a high pressure seal to prevent leakage when the riser is in a fully extended position; and the second seal portion provides a low pressure seal during pressure build-up as the riser is extending.

Abstract: A configurable rotary spray nozzle having lower manufacturing and maintenance costs through the use of an external shell providing strength and resistance to damage such that molded internal components can be utilized to provide the desired spray characteristics. The molded internal wet components can comprise molded polymeric structures that allow for the formation of complex flow geometries and structures that are either impossible or economically impractical to achieve with conventional tooling and machining operations. The use of an external shell provides for use of replacement kits to maintain or otherwise replace worn and/or damaged internal wet components while reusing the external housing. The use of the external shell also allows a user to customize and change spray performance of the configurable rotary spray nozzle by swapping internal wet components having selected flow geometries and characteristics so as to provide a desired spray performance.

Abstract: A sprinkler includes a turbine, a nozzle, and a reversing planetary gear drive. The reversing planetary gear drive rotatably couples the turbine and the nozzle through an additional reversing mechanism external to the planetary gear drive. The planetary gear drive includes a shift sun gear capable of axially shifting between raised and lowered positions to alternately drive a non-axially shifting first planet gear that in turn drives a first ring gear and a non-axially shifting second planet gear that in turn drives a second ring gear through an idler gear, the first and second ring gears having different gear tooth profiles to thereby change a direction of rotation of the planetary gear drive and rotate the nozzle in clockwise and counter-clockwise directions at a substantially uniform predetermined speed of rotation.

Abstract: A sprinkler includes a turbine, a nozzle, a planetary gear drive and a reversing mechanism. The planetary gear drive and the reversing mechanism rotatably couple the turbine and the nozzle. The planetary gear drive includes a control shaft that is axially movable to shift a direction of rotation of an output stage that is coupled to the reversing mechanism. The reversing mechanism includes a shift member secured to an upper end of the control shaft. The reversing mechanism further includes a pivotable shift fork with a first cam and a second cam spaced from the first cam. The first cam is configured to engage the shift member and raise the control shaft when the shift fork is pivoted to engage the first cam with the shift member. The second cam is configured to engage the shift member and lower the control shaft when the shift fork is pivoted to engage the second cam with the shift member.

Abstract: Rotary-sprinkling shower comprises: a body which has a water inlet end and a water outlet end forming a waterway there-between; a front cover component rotatably disposed on the water outlet end of the body, equipped with water spray nozzles in communication with the waterway; a hydraulic driving unit disposed in the waterway, while connected with the front cover component by a rotating shaft; the hydraulic driving unit is driven by the water flow in the waterway to drive the front cover component to rotate. The invention drives the whole front cover to rotate by water flow, achieves the rotary sprinkling water; every water spray nozzle on the front cover rotates around the center of the whole front cover instead of its self-center, therefore, the rotation scope of the water flow is relatively larger.

Abstract: A sprinkler device has an inlet-driving assembly mounted in by a rotary seat, and an outlet valve whose one end is mounted through the rotary seat and in the inlet-driving assembly and the other end has multiple through holes. A spray nozzle assembly is mounted on the outlet valve and has multiple first and second spray holes communicating with the through holes of the outlet valve and the rotary seat, and has a block flange formed around a periphery thereof. A first and a second O-rings are sequentially mounted on the block flange. One end of the spray nozzle assembly is mounted through a cover mounted on the inlet driving assembly. Subjected to a same pressure from water filled in all parts of the sprinkler device, the first and second O-rings reduce friction between the block flange and the cover to enable a smooth rotation of the spray nozzle assembly.

Abstract: A spraying device includes a control handle, a first hollow barrel, a second hollow barrel, a driving unit, a spraying tube, and a liquid ejection tube. With the driving unit that is driven by high pressure air to rotate received inside the second hollow barrel, when the control handle is operated to supply high pressure air to drive the driving unit to rotate in high speed, the spraying tube is caused to rotate with a high speed, making high pressure rotating air ejected from the spraying tube inducing repeated and rotating impacts on a surface to be cleaned to thereby improve the effect of dust removal. Further, the liquid ejection tube is located within the spraying tube and ejects a stream of water (or cleaning agent), which is mixed with the high pressure air to generate a high speed rotating impact to also realize surface rinsing of an object.

Abstract: A lawn sprinkler providing water distribution over an irregular or unique shaped water receiving area. The apparatus includes a water impeller, a first water regulator, a second water regulator, and a bypass channel. The sprinkler regulates the delivery of water according to the shape of the area to be irrigated, so that water is not wasted on adjacent areas which do not require irrigation.

Abstract: A sprinkler includes a stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports. A non-rotating arc adjustment sleeve is mounted for axial movement relative to the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water ejected from the stream forming ports.

Abstract: The rotating sprinkler head valve includes an upper assembly with a stationary rigid cone received in a conical interior chamber of a rotor, and a cylindrical shaft extending through the stationary rigid cone and rotor. A lower assembly includes a bottom helix member, a strainer adapter having an internal transverse slotted plate and a rotatable slotted flow plate to permit flow when the flow plate slots are aligned with slots in the internal transverse slotted plate. A base top member includes a downwardly extending inner tubular portion and a lower interior edge surface with a helical lower surface forming an adjustable helical aperture in cooperation with the bottom helix member, and a recessed inner helical lip is configured to receive the upper helical surface of the bottom helix member for adjusting a helical aperture.

Abstract: One embodiment provides an asymmetrical nozzle housing within a nozzle base of a sprinkler which, when rotated, changes its angular orientation relative to the nozzle base. Since the nozzle is disposed within the nozzle housing, it similarly changes angular orientation relative to the nozzle base, thereby modifying the trajectory of ejected water during irrigation. In this respect, a user can change the trajectory of a watering stream by simply rotating the nozzle housing.

Abstract: A flow shut off or throttling valve is provided in a sprinkler nozzle housing to enable a nozzle to be changed without having to turn off a flow pressure source. The valve intersects a flow path through the nozzle housing and has an opening such that when the opening is aligned with the flow path, a flow stream can flow unobstructed through the flow path. The valve is movable between a fully open position in which the opening is aligned with the flow path and a closed position which blocks the flow stream from flowing to a nozzle disposed at an outlet passage of the flow path. The valve may be constructed to be either slidable or rotatable between the two positions, and is actuated by a gearing arrangement which is operable at the exterior of the nozzle housing. The external valve actuator may function as a physical barrier to retain the removable nozzle in the nozzle housing when the valve is open and to disengage the nozzle when the valve is closed.

Abstract: A sprinkler device has an inlet-driving assembly mounted in by a rotary seat, and an outlet valve whose one end is mounted through the rotary seat and in the inlet-driving assembly and the other end has multiple through holes. A spray nozzle assembly is mounted on the outlet valve and has multiple first and second spray holes communicating with the through holes of the outlet valve and the rotary seat, and has a block flange formed around a periphery thereof. A first and a second O-rings are sequentially mounted on the block flange. One end of the spray nozzle assembly is mounted through a cover mounted on the inlet driving assembly. Subjected to a same pressure from water filled in all parts of the sprinkler device, the first and second O-rings reduce friction between the block flange and the cover to enable a smooth rotation of the spray nozzle assembly.

Abstract: A viscosity driving device for a lifting buried spraying head includes a cylindrical case (2), a filter (3) provided in the lower end of the case (2), and a spraying head driving unit disposed inside the case (2). The spraying head driving unit is connected with a spraying head positioned on the top end of the case (2) by means of a connecting shaft, and the spraying head driving unit drives the spraying head to rotate and spray water. The spraying head driving unit comprises a tangential flow generator (4) and a hydraulic rotator (5), and the hydraulic rotator (5) rotates under the action of viscosity of rotating water generated by the tangential flow generator (4) to drive the spraying head to rotate and spray water.

Abstract: A nozzle discharge assembly includes a housing having a connection for receiving a pressurized supply of liquid and a nozzle having a discharge orifice movable relative to the housing. A mechanism controls a movement of the discharge orifice so that the discharge orifice moves in a pattern relative to the housing for creating a substantially helical stream of liquid when the pressurized supply of liquid flows through the discharge orifice.

Abstract: A sprinkler comprising a housing fitted with an inlet port connectable to a water supply line and extending into an inlet chamber, a hollow stem member with an inlet end thereof being in flow communication with said inlet chamber and an outlet end thereof being in flow communication with an irrigation head, a diaphragm seal sealingly fixed at peripheral boundaries thereof to the housing and sealingly articulated to the stem member and supporting it at an essentially upright position. The diaphragm is deformable between a first position in which the irrigation head is retracted within the housing and a second position in which the irrigation head projects from the housing. The sprinkler comprising at least one guard portion adapted to prevent insects and undesirable material from entering the sprinkler housing during said second position.

Abstract: A sprinkler comprising a housing fitted with an inlet port connectable to a water supply line and extending into an inlet chamber, a hollow stem member with an inlet end thereof being in flow communication with said inlet chamber and an outlet end thereof being in flow communication with an irrigation head, a diaphragm seal sealingly fixed at peripheral boundaries thereof to the housing and sealingly articulated to the stem member and supporting it at an essentially upright position. The diaphragm is deformable between a first position in which the irrigation head is retracted within the housing and a second position in which the irrigation head projects from the housing.