Abstract: A sprinkler head housing encloses, supports, and provides access to a sprinkler head in order to allow maintenance and access to the sprinkler head. The sprinkler head housing includes a top and a wall descending therefrom. The sprinkler head housing can accommodate sprinkler heads having differently sized diameters.

Abstract: A sprinkler includes an outer housing having a lower end connectable to a source of pressurized water and a riser that is vertically reciprocable within the outer housing between extended and retracted positions when the source of pressurized water is turned ON and OFF. A nozzle is mounted at an upper end of the riser for rotation about a vertical axis. A Pelton turbine is mounted inside the riser for rotation about a horizontal axis, as distinguished from a vertical axis. A drive mechanism connects the turbine to the nozzle so that when the source of pressurized water is turned ON the resulting rotation of the turbine by the pressurized water will rotate the nozzle. The turbine as well as a gear train reduction and a bevel gear reversing mechanism are assembled inside a self-contained clam-shell drive subassembly before being inserted into the riser.

Abstract: A pop-up sprinkler assembly includes a cylindrical housing having a cap on an upper end thereof, the cap having an opening, a lower end of the cylindrical housing having an internal thread for attachment to a source of pressurized water. A stem is mounted in the cylindrical housing with a spring radially between the stem and the cylindrical housing for normally biasing the stem to a retracted position within the cylindrical housing. The stem is extendable through the opening in the first cap to an extended position when water under pressure is supplied to the cylindrical housing. The stem has a threaded upper end to which an alternative sprinkler head is attached. An adapter housing is received over the cap and secured to the cylindrical housing, the sprinkler housing having an open upper end, the adapter housing having a diameter sufficient to receive the alternative sprinkler head when the stem is in the retracted position.

Abstract: A dirt-resistant bearing system for a sprinkler unit with a rotatable turret having a central shaft extending into a support channel formed within an inner housing. The central shaft may be formed with a relatively upper shaft portion and a relatively lower shaft portion, and the support channel may be formed with an upper channel region and a lower channel region. A first bearing and sealing assembly may be fitted substantially around an outer perimeter of the upper shaft portion and in communication with the upper channel region, and a second bearing and sealing assembly may be fitted substantially around an outer perimeter of the lower shaft portion and in communication with the lower channel region. Another aspect of the invention provides a sprinkler head with a fitted serrated seal assembly. The fitted seal assembly may include an outer case having an interior region, and a pop-up sprinkler head turret mounted on a riser sleeve slidably mounted within the interior region of the outer case.

Abstract: A pop-up sprinkler includes an outer housing having an inlet passage and an inlet for connection to a source of pressurized fluid. A riser is mounted in the housing for moving from a normally retracted position to an operative extended position in response to fluid pressure. A pressure responsive inlet valve assembly is mounted in the outer housing adjacent the inlet passage and includes a valve seat and a valve member. The inlet valve assembly further includes a velocity control disc that is biased into engagement with the valve seat. The velocity control disc initially meters inlet fluid for limiting a rate of opening of the valve member for controlling flow of fluid through the inlet and extension of the riser to the extended position. The velocity control disc is made of an elastomeric material and is deflectable radially inwardly to accommodate debris.

Abstract: Novel devices and methods for covering underground sprinkler heads installed on golf courses and other sports fields are described. The invention, in certain aspects, comprises the use of mats for covering a sprinkler head lid and/or the above-ground or ground level portion of the underground casing for housing the sprinkler head assembly. The mats are formed of a shock absorbing material such that when a golf ball, for example, strikes the mat(s), the ball does not rebound away as severely compared to striking the rigid lid and/or above-ground casing portion directly (i.e. without the mat covering). Other embodiments including fabricating the sprinkler head lid and/or above-ground casing portions of the same shock-absorbing material.

Abstract: A swimming pool bottom flushing device comprising a tubular supporting arrangement attached to a pipe arranged at the bottom of a swimming pool, and a water ejector nozzle axially fitted into said supporting arrangement in a rotatable, vertically shiftable arrangement. This device is characterized in that the nozzle is formed by an open-ended tubular body provided at least with one opening in its periphery and fitted with a tubular, rotationally positionable plug peripherally provided with openings of different diameters provided to selectively face the openings of the tubular body in order to control the outflow of the water jet being ejected for the flushing of the swimming pool bottom. The top plug is selectively secured by means of a bayonet attachment into a number of positions when fitted to the tubular body of the nozzle.

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 having a rotatable spray head mounted at an upper end thereof. 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.

Abstract: A sprinkler head assembly comprised of a base located at the upper end of a riser tube and which base carries an insert with an opening allowing for distribution of water. In accordance with the present invention, a control valve is located directly at the sprinkler head assembly. The control valve may be located in a stationary or shrub head which would be connected to a base or otherwise to a riser tube. The control valve could be located in a pop-up shaft, pop-up sprinkler head, or in a retrofit coupling or adapter located between a riser tube and sprinkler head. The control valve would rely upon a screw capable of being threadedly moved into a duct generally perpendicular thereto and which would have a diametral size somewhat larger than the duct. Moreover, the screw would be provided with an opening having a diameter approximately equal to that of the duct. The opening would be alignable with the duct in one position and when rotated would completely block the flow in another position.

Abstract: A pop-up sprinkler of the type that includes a riser that moves upwardly out of a sprinkler housing when water pressure is applied and that allows manual adjustment of the angular orientation of the riser with respect to the housing to adjust angular orientation of the spray from the sprinkler, and provides for such angular adjustment by having a toothed flange associated with the riser in the housing which engages tabs associated with the housing, provides for longer life of the toothed flange and/or the tabs by providing slots extending radially inwardly in the toothed flange to reduce its rigidity to the extent that the teeth and/or tabs do not wear as quickly.

Abstract: A swimming pool bottom flushing device comprising a tubular arrangement attached to the pipe arranged at the swimming pool bottom, and a water ejector nozzle axially fitted into said supporting arrangement in a freely rotatable, vertically shiftable arrangement. The device is characterized in that the nozzle supporting arrangement comprises a socket attached to the inside of the pipe and does also incorporate a fitted-in ball-bushing housing the nozzle. Said socket has on its inner surface alternate, longitudinal protrusions some of which have a concave profile in the vicinity of one of the socket's openings, whereas the other protrusions have said concave profile in the vicinity of the opposed one of both socket's openings.

Abstract: A dirt-resistant bearing system for a sprinkler unit with a rotatable turret having a central shaft extending into a support channel formed within an inner housing. The central shaft may be formed with a relatively upper shaft portion and a relatively lower shaft portion, and the support channel may be formed with an upper channel region and a lower channel region. A first bearing and sealing assembly may be fitted substantially around an outer perimeter of the upper shaft portion and in communication with the upper channel region, and a second bearing and sealing assembly may be fitted substantially around an outer perimeter of the lower shaft portion and in communication with the lower channel region. Another aspect of the invention provides a sprinkler head with a fitted serrated seal assembly. The fitted seal assembly may include an outer case having an interior region, and a pop-up sprinkler head turret mounted on a riser sleeve slidably mounted within the interior region of the outer case.

Abstract: A flush plug is provided for temporarily sealing an outlet at an upper end of an irrigation sprinkler riser extensible from an outer housing. A cap is configured to substantially cover the outlet of the riser. The cap has an output orifice dimensioned to reduce the flow of water from the riser a sufficient amount so that the riser will move to an elevated position under normal operating pressure. The cap is configured so that it can be temporarily connected to the upper end of the sprinkler riser. A shut-off flap is pivotally connected to the cap for covering and uncovering the output orifice. A lever is connected to the shut-off flap and is configured and located to engage an upper end of the sprinkler housing when the riser moves to a retracted lowered position. This positively moves the shut-off flap so that it covers the output orifice in the cap. When the riser moves to the elevated position the lever is no longer engaged with the upper end of the sprinkler housing.

Abstract: A dirt-resistant bearing system for a sprinkler unit with a rotatable turret having a central shaft extending into a support channel formed within an inner housing. The central shaft may be formed with a relatively upper shaft portion and a relatively lower shaft portion, and the support channel may be formed with an upper channel region and a lower channel region. A first bearing and sealing assembly may be fitted substantially around an outer perimeter of the upper shaft portion and in communication with the upper channel region, and a second bearing and sealing assembly may be fitted substantially around an outer perimeter of the lower shaft portion and in communication with the lower channel region. Another aspect of the invention provides a sprinkler head with a fitted serrated seal assembly. The fitted seal assembly may include an outer case having an interior region, and a pop-up sprinkler head turret mounted on a riser sleeve slidably mounted within the interior region of the outer case.

Abstract: A kit for fitting to a sprinkler head that includes a fixed distance spacer. The spacer is designed to fit into the top of the head of an underground water sprinkler system. The second end of the spacer will threadably engage the stem. The spacer will raise the stem above the top of the head, so as to not require digging to get to the base of the head. In this way, when the grass grows or the level of the soil is elevated, one may raise the level of the stem by putting a spacer between the stem and the head, without having to dig.

Abstract: An improved inlet control valve is provided for controlling water inflow to an irrigation sprinkler, wherein the inlet control valve exhibits improved tolerance to passage of small grit and debris. The inlet control valve includes a valve member normally engaging a valve seat to prevent water inflow to the irrigation sprinkler, and adapted for movement to a modulated open position to permit water inflow to the sprinkler at a regulated pressure. The valve member carries a flow restrictor disposed upstream from the valve seat to produce, when the valve member is in the open position, a first pressure drop which cooperates with a second pressure drop between the valve seat and valve member to regulate the water inflow pressure. The inclusion of the upstream flow restrictor and the associated first pressure drop effectively reduces the magnitude of the second pressure drop across the valve seat and thereby permits the valve member to open with an increased clearance relative to the valve seat.

Abstract: A closed-case impact sprinkler unit having an outer case and an internally positioned riser sleeve that is upwardly extendable into a pop-up position. The riser sleeve may be formed with an external surface that is complimentary to the internal surface of the outer case to prevent the introduction of debris into the interior region of the outer case when the riser sleeve is in a pop-up position. The sprinkler unit may further include a closed-case turret assembly rotatably mounted on the riser sleeve that includes a fluid outlet and a compact impact sprinkler arm.

Abstract: A sprinkler unit of the type that includes an impact drive sprinkler vertically reciprocable inside a subterranean can or case is modified to incorporate a modern pop-up rotor-type sprinkler. The rotor-type sprinkler has a lower retraction spring retainer half-way up its outer riser and a shortened retraction spring. A cylindrical adaptor sleeve surrounds the riser and has its upper end screwed into the upper end cap of the rotor-type sprinkler. The impact drive sprinkler and its attached riser assembly are unscrewed from the subterranean mounting case. Thereafter, a lower male threaded end of the adaptor sleeve is screwed into a female threaded segment at the junction of the lower and upper sections of the cylindrical mounting case. A ring-shaped protective cover plate with a pair of spring retention arms is rotatably mounted to the top end of the rotor-type sprinkler to fill the gap between the sprinkler and the upper curved lip of the cylindrical mounting case.

Abstract: A pop-up sprinkler includes an outer cylindrical fixed housing for subsurface mounting and a riser reciprocally mounted in a central bore of the housing. Pressurized water causes the riser to extend and place a nozzle at its top end above the surface of the ground. A radially retractable and expandable containment ring is mounted at an outlet end of the housing and engages an annular inner shoulder of the housing for retaining a coil spring. The spring retracts the riser when the pressurized water is turned OFF. The containment ring includes a substantially rigid support ring and an elastomeric sealing ring co-molded thereto. The support ring is split to enable radial expansion and retraction due to its resiliency. The elastomeric sealing ring spans the gap between the opposite ends of the support ring. The elastomeric sealing ring has a tapered edge that extends radially inwardly to engage the riser.

Abstract: A pop-up rotary sprinkler with adjustable arc limits has an arc adjustment tool engaging member slideably mouted in a guide sleeve in the head of the sprinkler that has a progressively narrowing diameter. The member includes a radially expandable and contrastable collet at the upper end thereof and a pinion gear at a lower end thereof for engaging the teeth of a bull gear for setting at least one of the end limits of the desired arc. When the tool is inserted into the member, it moves downwardly, and a pair of flanges of the tool are locked into slots in the collet. The tool cannot be removed until it is pulled upwardly to permit the collet to expand radially to allow the flanges of the tool to be pulled past a ring at the upper end of the collet.

Abstract: A pop-up sprinkler head is provided with a mechanism that shuts off the water when the nozzle portion of the riser is removed for maintenance. A stopper element reciprocally mounted in the riser moves to a shut off position when the nozzle is removed. A valve seat member and a stopper element may be provided to retrofit the riser of an existing sprinkler head.

Abstract: A kit for fitting to a sprinkler head that includes a fixed distance spacer. The spacer is designed to fit into the top of the head of an underground water sprinkler system. The second end of the spacer will threadably engage the stem. The spacer will raise the stem above the top of the head, so as to not require digging to get to the base of the head. In this way, when the grass grows or the level of the soil is elevated, one may raise the level of the stem by putting a spacer between the stem and the head, without having to dig.

Abstract: A sprinkler device for distributing water comprising a body, a nozzle, a nozzle housing rotatably and slidably mounted in the body, a fluid flow interrupter for intermittently redirecting the stream of fluid exiting from the nozzle, an interrupter drive, a flow control assembly including a free floating valve for controlling water flow to the sprinkler head, reversing mechanism for reversing the direction of movement of the nozzle housing, and a nozzle positioning system for controlling sprinkler rotation speed.

Abstract: A pop-up sprinkler unit includes an outer cylindrical fixed housing for subsurface mounting, with a riser reciprocally mounted in a central bore of the housing for extending up through a portion of the soil. A radially retractable and expandable resilient plastic containment ring is mounted at an outlet end of the housing and engages an annular inner shoulder of the housing for retaining a coil spring and the riser in the bore. The containment ring is split to enable expansion and retraction. It has a first height throughout a first portion of its circumference and a second lower height throughout a second portion of its circumference to enable overlap during insertion of the ring into the upper end of the fixed housing. This configuration eliminates a gap at the split when the ring is in its retaining position, thereby preventing debris from entering the bore of the housing and preventing complete extension and/or retraction of the riser.

Abstract: An apparatus providing low volume irrigation from a previously installed sprinkler irrigation system including one or more sprinkler heads connected to a water supply conduit. The apparatus includes a manifold (50) having a water distribution passage (34) therein. The water distribution passage (34) includes an inlet end (35) and an outlet end (36) with the outlet end adapted to receive a conveyance channel (38) for distributing water to an emission point (42, 43). A flow control device (39) is associated with the water distribution passage (34) to control the flow rate of water through the passage to a rate exceeding a local hydraulic loading rate of the soil in the area around the emission point (42, 43). The manifold (50) is connected to receive water which is supplied to the sprinkler head through the water supply conduit.

Abstract: A sprinkler device has a helical track and a tracking element coupled between a reciprocating piston and a rotating head or nozzle to convert the reciprocal linear motion of the piston to rotation motion of the head or nozzle. A sprinkler housing defines a chamber for receiving the reciprocating piston. A sprinkler head is rotatably disposed on the housing and has a shaft extending into a cavity of the piston. The helical track is formed in the exterior surface of the shaft. Water is channeling into the chamber causing the piston to move in a linear direction. A tracking element formed on the piston engages the track and forces the shaft, and thus the head, to rotate. A return mechanism is coupled to the head and engages a valve to control the channeling of the water about the piston, causing the piston to reciprocate. An adjustable valve controls the flow of the water about the piston, and thus the rotational speed of the head.

Abstract: A new water activated pop-up sprinkler for allowing for low volume irrigation of lawns and gardens. The inventive device includes a cylindrical housing having an open upper end, a closed lower end, a cylindrical side wall therebetween, and a hollow interior. The closed lower end has a tapered pointed end extending downwardly therefrom for penetrating a ground surface. The cylindrical housing has diametrically opposed inlet and outlet connections disposed on the cylindrical side wall downwardly of the open upper end. The connections each have channels extending downwardly within the cylindrical side wall to the closed lower end and meeting centrally within the closed lower end wherein a short channel extending upwardly into communication with the hollow interior. An inner plastic pipe is provided having opposed open ends. A lower open end couples with the short channel of the cylindrical housing. The plastic pipe has a spring disposed therearound.

Abstract: An improved pop-up irrigation sprinkler with integral flow control valve, and an improved separate flow control valve, defined by a dual flowpath for pilot flow within the flow control valve; a stem-flushing feature using an interrupter disc (54) mounted on a piston (48), providing a flowpath for a brief hydraulic flushing cycle after a momentary interruption of flow; a direct acting hydraulic pilot valve (92) to permit hydraulic control of an electric type sprinkler or a separate flow control valve; an improvement of the bearing guide (80) by the addition of a resilient barrier seal (84) to prevent seizing of the stem to the bearing guide when fully extended, the seal maintaining a close fit to the stem and yet being sufficiently resilient to permit the flushing of the stem; and a variable orifice in the inlet to the bonnet chamber to retard the initial opening rate of the valve.

Abstract: A pop up sprinkler unit includes a housing having an inlet including a passage for connecting to a source of fluid such as water or air, a pressure responsive inlet valve assembly including a valve seat surrounding the inlet, a valve member having annular sealing normally biased into engagement with the seat, and a velocity control disc mounted on the valve member and extending into the passage at the inlet, the velocity control disc metering initial inlet fluid for controlling the rate of opening of the valve for controlling flow of fluid through the valve to a nozzle and extension of a riser to an extended position.

Abstract: A sprinkler unit with riser damping comprises a tubular housing having an inlet for connecting to a source of water, a tubular riser reciprocally mounted in the tubular housing and moveable from a retracted position within the housing to an extended position from the housing, the riser having an outlet having a nozzle for distributing a stream of water outward from the housing, a passage connecting the inlet to the outlet, a retraction spring normally biasing the riser to the retracted position, and a shock absorbing ring mounted on the riser for damping movement of the riser to the extended position.

Abstract: An irrigation sprinkler of the type having an inlet control valve is provided with a removable valve seat formed integrally with an inlet filter screen. The valve seat is positioned to engage a valve head to normally prevent water inflow to a sprinkler case, whereas the filter screen prevents entry of small rocks and other particulate debris into the sprinkler case when the inlet control valve is open. The valve seat is removable from the top of the sprinkler case, without requiring disconnection of the case from a water supply line, to permit flushing of collected debris or to permit replacement of a damaged valve seat.

Abstract: A sprinkler unit comprises a tubular housing having an inlet for connecting to a source of water, a tubular riser telescopically reciprocally mounted in the tubular housing and moveable from a retracted position within the housing to an extended position from the housing, the riser having an outlet having a nozzle for distributing a stream of water outward from the housing, a passage connecting the inlet to the outlet, a retraction spring normally biasing the riser to the retracted position, and a shock absorbing coating on the retracting spring for absorbing the shock of movement of the riser to the extended position.

Abstract: A pop-up sprinkler which includes a housing, a riser in the housing movable between an extended position in which the riser extends from the housing and a retracted position in which the riser is retracted from the extended position and a pressure regulator in the riser. The pressure regulator can be constructed as a cartridge or separate unit and installed in the riser. The riser has an aperture adjacent the pressure regulator and the aperture is between first and second axially spaced seals in the extended position so as to reduce the likelihood of clogging of the aperture. A dirt tolerant wiper seal is mounted on a movable valve tube of the pressure regulator and a pressure activated seal is provided between a valve seat of the pressure regulator and the valve tube.

Abstract: A sprinkler system for distributing water from a source substantially evenly over an area of terrain comprises a body defining a passage having an inlet connected to an outlet extending at an angle to the inlet, and a generally circular nozzle plate having a plurality of nozzles therein rotatably mounted at the outlet for selectively positioning a selected one of the plurality of nozzles in alignment with the outlet for distributing a stream of water outward from the housing, and the nozzle plate being selectively rotatable for selectively moving the nozzle plate to a selected nozzle position.

Abstract: A sprinkler unit comprises a housing having an inlet for connecting to a source of water, an outlet, passage means connecting the inlet to the outlet, a nozzle detachably mounted in the outlet for distributing a stream of water outward from the housing, and a valve in the passage selectively operable for selectively stopping flow of water through the passage means to the nozzle and an actuator operable from the exterior of the housing for selectively operating the valve.

Abstract: An irrigation apparatus (10) includes a conduit housing (14) with at least one elongated, flexible irrigation conduit (12) received in a retracted position therein. A water supply arrangement associated with the conduit housing (14) allows water to be supplied through the housing to a proximal end (20) of each irrigation conduit (12). Also, a conduit deployment arrangement associated with the conduit housing (14) allows the irrigation conduits (12) to extend from the housing to an extended position in response to water supplied to the housing through the water supply arrangement. In the extended position, each irrigation conduit (12) extends over an area to be irrigated, and emitters along the length of each conduit emit water to efficiently irrigate the area under and immediately surrounding the extended conduit. A conduit retracting arrangement (32) retracts the irrigation conduits (12) back to the retracted position once the water pressure is withdrawn from the device.

Abstract: A pop-up sprinkler unit for mounting beneath the surface of a soil formation includes an outer cylindrical housing for subsurface mounting, with an inner housing carrying a nozzle and drive turbine reciprocally mounted in the outer housing for extending up through a portion of the soil and pressure responsive seals disposed between the inner and outer housings for sealing at predetermined pressures.

Abstract: A pop-up sprinkler unit for mounting beneath the surface of a soil formation includes an outer cylindrical housing for subsurface mounting, with an inner housing carrying a nozzle and drive turbine with a protective sleeve of a grit resistant material reciprocally mounted between the inner and outer housings for extending with the inner housing up through a portion of the soil for deflecting grit from between the sleeve and housing when the inner housing and sleeve is retracted.

Abstract: A vandal resistant part circle gear driven sprinkler having a plastic pop-up assembly including a nozzle housing rotatably mounted to a non-rotatable pop-up stem within which a reversible gear drive mechanism is mounted. A slip clutch is provided for mounting the reversible gear drive mechanism within the stem to prevent relative rotation during normal sprinkler operation, but which permits the mechanism to rotate relative to the stem whenever an external torque above a preselected level is applied to the nozzle housing.

Abstract: A sprinkler unit for distributing water from a source over an area of terrain comprises a tubular housing having an inlet connected by a passage to an outlet, a distributor head mounted at the outlet for rotation about an axis for distribution of water via a nozzle, a turbine wheel disposed in the housing passage and operatively connected for driving the distributor head, and a turbine stator assembly having a passage including a throttling device for controllably directing a first portion of water to the turbine wheel, and a pressure responsive valve for controllably diverting a second portion of the water around the turbine wheel in proportion to the pressure thereof for maintaining the speed of the turbine substantially constant.

Abstract: A flooding prevention device and a breakage prevention device for use with pressurized fluid systems are disclosed. The flooding prevention device includes a pipe with an interior passageway and a stopper located in the passageway, the stopper being adapted to seal the pipe whenever an accessory attached to the pipe is broken, thereby preventing fluid loss from the pressurized fluid system. The breakage prevention device includes a first pipe and a second pipe slidable within the first pipe, the sliding action accommodating pressure on or movement of components of the fluid system, thereby avoiding component breakage.

Abstract: A pop-up rotary sprinkler includes a sprinkler body, a rotatable distributor and nozzle assembly mounted in the sprinkler body for movement between inoperative retracted and operative extended positions in response to fluid pressure within the sprinkler body. The rotatable distributor has a plurality of water distribution grooves and is supported at an upper end portion of a shaft, while the nozzle assembly surrounds a lower end portion of the shaft. The nozzle assembly includes a discharge orifice having a peripheral surface at least a part of which is defined by a peripheral surface of the shaft, and a deflector is mounted on the shaft downstream of the discharge orifice and upstream of the distributing grooves, and is adapted to direct water emanating from the discharge orifice onto the distributing grooves so as to avoid direct impingement on a seal located at the distributor-shaft interface.

Abstract: A low volume irrigation sub-assembly is dimensioned to be removably fitted in an extensible riser of a conventional pop-up spray housing. The sub-assembly has an upstanding low volume emitter extending generally axial to the direction of elongation of the housing and the riser, and includes a filter and flow control device for restricting the pressure of water passing between the interior of the riser and the emitter aperture.

Abstract: An irrigation sprinkler nozzle comprising a tubular nozzle housing with a nozzle body mounted therein, the nozzle body defining a nozzle passageway having an outlet orifice and cooperating with the housing to define a chamber between the body and housing with a chamber outlet passage disposed adjacent the outlet orifice. A water bleed opening is formed to communicate between the passageway up-stream of the outlet orifice and the chamber so that water flowing through the passageway is bled into the chamber and aspirated into the stream from the outlet orifice through the outlet passage.

Abstract: A flush sprinkler has a sprinkler unit raisable and lowerable in hydraulic manner in a shaft and, several nozzle units, which, as required, can be switched into a sprinkling state with an upper nozzle selecting handle and whose nozzle jets can be modified independently by a jet spreading member adjustable with an associated jet adjusting handle. There are also rings for varying a spray spreading angle as a function of size and position. The handles are raisable and lowerable with the sprinkler unit and therefore easily accessible. For cleaning the bearing of the sprinkler unit, an automatically valve-controlled flushing device is provided. For the reliable draining of the sprinkler, a drain valve is provided directly in the water flow and its body is clipped into a valve bore of the shaft.

Abstract: A pop-up irrigation sprinkler including a sprinkler case having an open upper end through which a sprinkler nozzle coupled to a sprinkler mechanism can be extended, the sprinkler mechanism being retained within the case by a retaining ring mounted in a groove in the case, and a retaining cover and sealing assembly for sealing the open end of the case around the nozzle and for preventing the split ring from being inadvertently unseated from the groove.

Abstract: A rotary sprinkler includes a sprinkler head rotatably mounted about a rotary axis, and also mounted for reciprocation along its rotary axis; and a stepping mechanism for stepping the sprinkler head an increment of rotation during each reciprocation of the sprinkler head, such that each time the pressurized water is applied to the sprinkler head, it discharges the jet at a slightly different direction laterally of the sprinkler.

Abstract: A gear drive sprinkler includes a fixed ring gear fixed to the sprinkler housing and having a circular array of teeth; a rotatable ring grear coupled to the sprinkler nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of the fixed ring gear; and a planetary gear rotated by the sprinkler drive and having a circular array of teeth meshing with the teeth of both ring gears so as to planetate around both ring gears and thereby to rotate the rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in the two ring gears.

Abstract: A sealing device for sprinklers and the like having predetermined pressurized and unpressurized conditions, the device having a body portion; an attachment member mounted on the body portion for releasable attachment to the sprinkler; a wall mounted on the attachment portion defining a passage extending through the body portion for releasing fluid from the sprinkler externally of the body portion when the sprinkler is in the pressurized condition; and a sealing plate mounted on the body portion and engageable with a portion of the sprinkler in the unpressurized condition to seal the passage of the body portion against fluid entering the sprinkler therethrough.

Abstract: A sprinkler having a nozzle for directing a desired flow of water therefrom, the sprinkler having a water turbine drive device for rotating the nozzle in response to water passing through the sprinkler; the sprinkler has a seal between its cover and housing and with a pop-up riser, the nozzle being mounted in a rotatable nozzle housing connected to the water turbine drive device; a deflector is mounted in the nozzle housing for moving into and out of the water flow from the nozzle, the deflector being connected to a pivotally mounted arm with a cam follower actuated by a cam on the top of the riser; a modified sprinkler has two flow passages therethrough to a primary nozzle being directed through the water turbine drive device while the flow to the secondary nozzle is through a valving device to produce a predetermined contour.