Abstract: An irrigation sprinkler nozzle comprising a nozzle body having a range nozzle passage therethrough and a spreader nozzle disposed therebelow, the spreader nozzle being formed by a generally rectangular cross-sectional chamber having a generally rectangular cross-sectional outlet orifice, the chamber and outlet orifice being oriented with their long dimensions extending in a generally lateral direction substantially horizontal with the ground, the outlet orifice being laterally but not vertically smaller in size than the size of the chamber so that a vertically oriented fan-shaped spray pattern is produced by water projected from the outlet orifice.

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 deflector cap for use in connection with a conventional pop-up or other type of rotary sprinkler head is held in a fixed angular position with respect to the sprinkler head housing by means of a downwardly extending rod that slides within a tube fixedly attached to the sprinkler head housing. An annular array of individually-adjustable, wedge-shaped, flat deflector plates is mounted to the underside of the deflector cap. Each of the deflector plates is formed to have an outer wide end and an inner narrow end. The inner end of each of the deflector plates is hingedly attached to the deflector cap at a uniform radial distance from the center of the deflector cap, thereby permitting vertical movement of the outer ends of each of the deflector plates. Vertical movement of the individual deflector plates is facilitated by a screw adjustment mechanism associated with each of the deflector plates.

Abstract: A swimming pool pop-up fitting having a pop-up head responsive to the intermittent application of water under pressure to reciprocate between retracted and projected positions for directing a jet of water over the adjacent inner surface of a swimming pool from a nozzle in the head.The pop-up fitting includes a fixed retainer having cams that are engageable by camming pins carried by the nozzle head to incrementally rotate the head during its movement between retracted and projected positions. The pins can be removed and the head constrained against rotation to convert the head from a rotary head to a pop-up head which is rotationally stationary or fixed.The pop-up head includes a stem which mounts the nozzle. The nozzle has diametrically opposed nozzle openings which are selectively alignable with an opening in the stem.

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 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 pop-up sprinkler having a nozzle housing threadably coupled to a pop-up stem, and including an axially projecting tab formed on the upper end of the stem which cooperates with spaced ribs formed on the inside of the nozzle housing to prevent over tightening of the nozzle housing relative to the stem during assembly and which resists unthreading of the nozzle housing from the stem to prevent vandals from unthreading the nozzle housing from the stem.

Abstract: The cleaning nozzle of the invention is intended to clean the parts to be cleaned by the cleaning water, by feeding cleaning water into the cylinder tube, pushing out the injection nozzle from the mounting surface by the pressure of the cleaning water, and injecting cleaning water while rotating at the same time. Next, when the feed of cleaning water is stopped, the injection nozzle stops injecting cleaning water, and is simultaneously retracted into the housing, thereby closing the mounting part by the poppet valve.

Abstract: A sprinkler nozzle for distributing water from a source over an area of terrain comprising a body defining a passage having an inlet section connected by a curve to an outlet section extending at an angle to the inlet section, and a vent port in the passageway at the inside of the curve communicating with an annular chamber surrounding the inlet section for enhancing the reach of the nozzle.

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.

Abstract: A pop-up, rotating stream sprinkler device includes an outer housing having a first longitudinal axis, an inlet end adapted for connection to a source of liquid under pressure, a first inner housing telescopically mounted within the outer housing for movement between retracted and extended positions, and having a second longitudinal axis coincident with the first longitudinal axis, and an outlet end provided with a first arcuate slot adapted to discharge a stream of liquid under pressure. A non-rotatable shaft supports at one end thereof a substantially hollow distributor for rotation thereon downstream of the outlet. The other end of the shaft is fixedly mounted in the first inner housing, and the hollow distributor includes an interior chamber enclosing a brake assembly for retarding the rotation of the distributor.

Abstract: A drive clutch mechanism for a pop-up oscillating irrigation sprinkler which serves to protect the internal components of the sprinkler against forceable rotation of the pop-up assembly by vandals, or others, and which when operated does not disturb the previous setting of the trip mechanism in the sprinkler.

Abstract: A spray arm assembly for delivering a fluid under pressure into a dishwasher wash chamber consists of a spray arm having a rotational axis and defining a fluid passageway for distributing incoming fluid into the wash chamber, a tower section, structure for mounting the tower section to the spray arm for guided movement relative to the spray arm between a retracted position and an extended position, and structure on the tower section for directing fluid from the fluid supply into the wash chamber with the lower section in its extended position. Mounting structure, integrally formed with the spray arm, prevents the tower section from separating from the spray arm with the tower section in its extended position. Any number of cooperating tower sections can be employed.

Abstract: The present invention relates to a rotary pop-up type sprinkler device which includes a stationary nozzle for issuing a stream of water which engages a rotary distributor. The device includes a first outer housing designed for in-ground installation, and a second inner housing telescopically mounted within the outer housing. Upon commencement of flow of water under pressure into the sprinkler device, the second inner housing is extended to an above ground or operative position. The second inner housing is normally spring biased to the below ground inoperative position so that, upon cessation of the supply of water under pressure, the second inner housing returns automatically to its below ground inoperative position within the first outer housing. The second inner housing is also provided with a nozzle disk including at least one discharge orifice for discharging the stream of water under pressure.

Abstract: An irrigation sprinkler which may include a pop-up assembly driven by a water-flow powered motor. A nozzle is mounted on the upper end of the pop-up assembly and is rotated through an adjustable arc to irrigate a sector of a particular size, and it is automatically reversed at the end points of the selected irrigated sector to oscillate back and forth across the sector. The sprinkler is constructed so that if the pop-up assembly is rotated forceably beyond its preset arc of coverage, either by vandals or others, the sprinkler itself is not damaged, but it will automatically reset itself into its previously preset arc of coverage.

Abstract: A rotary stream sprinkler unit comprises a housing having a water flow passage in which is disposed a flow control unit having one or more passages configured to control the volume and pressure of a stream, which strikes and rotates a self-propelled rotary distributor head rotatably mounted at the outlet of the housing for dividing each stream into a plurality of final streams, and rotating each of the final streams through a selected arc during the rotation of the rotary head, with a pressure compensated damping device in the housing connected to the rotary head by means of a shaft supported by a resilient member at the outlet for controlling the rotational velocity thereof.

Abstract: This disclosure relates to apparatus for cleaning swimming pools, incorporating intermittent pop-up jet nozzles, the nozzles being adapted to intermittently rotate and project cleaning jets of water adjacent the inner surface of the pools. Wear and tear on the nozzle housing and related parts is minimized by use of a water delivery assembly in which the stop means for arresting upward movement of the nozzle are located in the lower part of the housing, thus eliminating bending moment of stress force against the housing and related parts. The inclusion of a retainer or cage within the housing provides other improvements in the operation of the water delivery assembly.

Abstract: A rotary stream sprinkler unit comprises a housing having a water flow passage in which is disposed a flow control unit having one or more passages configured to control the volume and pressure of a stream, which strikes and rotates a self-propelled rotary distributor head rotatably mounted at the outlet of the housing for dividing each stream into a plurality of final streams, and rotating each of the final streams through a selected arc during the rotation of the rotary head, with a damping device in the housing connected to the rotary head by means of a shaft supported by a resilient member at the outlet for controlling the rotational velocity thereof.

Abstract: The invention relates to an underground-installable spray irrigator device with a piston-type spray element raisable and rotatable by the pressure of the irrigation water, comprising a turbine which is rotated by the water pressure to rotate the rotatable portion of the piston spray element by way of a reduction gear, wherein the turbine is fed by feed means which are oriented obliquely to the turbine axis is such a manner as to provide the same direction of rotation, and are mobile between two stable positions in which they are orientated in opposite directions, they being connected, by a shaft coaxial to the turbine and to the casing of the device, to a rotation reversal member which is disposed at the top of the spray element and comprises striker means which are accessible directly from the upper region of the device and are adjustable in position to set the size of the spray angle.

Abstract: An irrigation sprinkler with an internal assembly which is caused to turn back and forth through a preset arc so that a nozzle at the upper end of the assembly may irrigate a sector of land of a particular size, and in which the internal assembly arc of the internal assembly is adjustable by depressing a spring-loaded arc-adjust screw in the end of the assembly by a small standard screwdriver, or the like, and rotating the screw either clockwise or counterclockwise to decrease or increase the arc.

Abstract: A sprinkling device for liquids comprises an emitter tube 18 of resiliently flexible material having a mounted inlet end 24.1 and an unmounted outlet end 24.2, the arrangement being such that, with liquid flowing at a sufficient rate through the emitter tube, hydraulic forces exerted by the flowing liquid on the tube cause the outlet end continuously to move about. The emitter tube is mounted on a fitting 16 which has a flow passage 34 therethrough which leads into the emitter tube, the flow passage having, at its inlet end, a pair of grooves 36 which lead tangentially into the flow passage. These tangentially arranged grooves impart a swirling motion to water entering the emitter tube. A pop-up sprinkler is also disclosed in which the emitter tube is mounted on a plunger which is displaceable in a barrel, the emitter tube protruding through an opening at the end of the barrel.

Abstract: An adjustable part circle sprinkler assembly including a sprinkler body structure and a sprinkler head structure mounted thereon for rotational movement in either direction about an upright axis. An interior water flow path from an inlet in the body to a stream discharging outlet in the head includes nozzles directing streams onto a reversible flow directing mechanism for driving an impeller selectively in either direction. The impeller is connected with the head to rotate the same by a gear driven speed reducer and a slip clutch. A part circle pattern control assembly is mounted in an open top of the head closed by a conveniently removable anti-vandal cap structure. The pattern control assembly cooperates with a lever and resilient post reversing mechanism for the reversible flow directing mechanism. Manual movements of the head are accommodated by the slip clutch which protects the gear driven speed reducer.

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 and secondary nozzle, the flow to the 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.

Abstract: A process for sprinkling water onto a lawn, comprising the steps of: (a) providing an in-ground pop-up sprinkler comprised of a cylindrical housing, a motor compartment structure, and rotatable sprinkler head, wherein 1. said cylindrical housing has a sprinkler compartment, a motor compartment, and an inlet communicating with said motor compartment, 2. the bottom end of said cylindrical housing is closed except for said inlet, 3. above the bottom end of said cylindrical housing, the housing forms said motor compartment, 4. above said motor compartment, said housing is radially enlarged to form said sprinkler compartment, 5. said sprinkler head is capable of limited extension and retraction, 6. when retracted, said sprinkler head is enclosed within said sprinkler head compartment formed within said housing, and 7.

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 reciprocably mounted between the inner and outer housings for extending with the inner housing up through a portion of the soil and includes a grit deflector on the housing surrounding the sleeve for deflecting grit from between the sleeve and housing when the inner housing and sleeve is retracted.

Abstract: A rotary stream sprinkler unit comprises a body having a water flow passage in which is disposed a flow control unit having one or more passages configured to control the volume and pressure of a stream which strikes and rotates a rotary distributor head rotatably mounted at the outlet of the housing for dividing each stream into a plurality of final streams and rotating each of the final streams through a selected arc during the rotation of the rotary head with a damping device connected to the rotary head for controlling the rotational velocity thereof.

Abstract: A two-stage pop-up sprinkler unit includes a cylindrical housing having a first telescoping sleeve reciprocably mounted in the housing and a second sleeve telescoping mounted within the first sleeve and containing the sprinkler head and driving mechanism, the first sleeve extending from the housing first for clearance of the ground surface and the second sleeve extends from the first sleeve with the head cleared to begin distributing water.

Abstract: An improved nozzle unit for periodically dispensing a fluid. The nozzle unit includes a fluid dispensing component mounted for confined displacement in a housing having first and second stop surfaces. The fluid dispensing component, when subjected to a displacement force produced by fluid flowing into the housing under pressure, moves from a primary stored position against the first stop surface to impact the second stop surface in a deployed position in which fluid flows through the dispensing component. At least one of the dispensing component and the housing is shaped and dimensioned to cause fluid flowing through the housing under pressure to produce fluid flow forces counteracting the displacement force which moves the dispensing component from the stored position to the deployed position. The fluid flow forces counteracting the impact force minimize material fatigue caused by the impact force and extend the operational life of the nozzle unit.

Abstract: A water-driven monitor is provided as a stand-by pre-aimed fire fighting device installed at a fixed location for fire protection of a structure or equipment, such as aircraft, in a hanger structure. The monitor is oscillated by providing a diversion of a minor flow of the water or water/foam to be discharged from the monitor, to reciprocate an annular piston in an annular cylinder in up and down directions. A pair of concentric barrel cams having helical cam tracks therein and a cam ring with attached cam rollers interconnect a fixed base assembly containing the piston and cylinder and a water or water/foam discharge assembly, such that linear piston motion includes oscillatory motion which is transferred to the discharge assembly. A four-way spool valve controls fluid flow to opposite sides of a piston head and a toggle action shuttle actuates the valve spool to reverse the piston movement and the direction of discharge tube oscillation.

Abstract: A rotary, pop-up sprinkler is provided which includes an in-ground container. A motor is reciprocably mounted in the container and includes a stator, a plate assembly mounted on the stator and a rotor rotatably received in the stator. The rotor includes a turret with a nozzle orifice. Hydraulic pressures on the rotor are balanced whereby anti-rotational drag is substantially reduced. A speed regulator is provided for maintaining a relatively constant rotational speed when the sprinkler is subjected to variances in hydraulic pressure.

Abstract: A pop-up guard or shield for use with a pop-up sprinkler mounted in a casing buried in the ground to protect against the entry of dirt, sand, weeds, and the like into the casing during sprinkler operation. The guard includes a spring biased sleeve which pops up together with the sprinkler during sprinkler extension to the operative position, and is retracted into the casing during movement of the sprinkler to the inoperative position.

Abstract: A rotating stream nozzle is provided particularly for use as an irrigation sprinkler, wherein the nozzle provides a plurality of outwardly directed and discrete water streams which are rotated in steps through a prescribed arcuate spray path. The rotating stream nozzle is adapted for mounting onto a water supply conduit and includes a swirl plate through which water under pressure flows with a swirling action into a relatively small drive chamber. The swirling water flow forces a drive ball within the drive chamber to move into repetitious impact engagement with raised anvils formed on the inner diameter surface of a cylindrical rotor lining the drive chamber and mounted for rotation within a nozzle cap. The rotor is displaced through a small rotational step each time the drive ball strikes one of the anvils, and the water is discharged from the nozzle as discrete rotating streams passing through small discharge ports in the rotor.

Abstract: Apparatus for enhancing the performance of a sprinkler assembly or the like, the apparatus having a frame slidably mounted on the sprinkler assembly. The frame mounts a spring-biased plunger which is operable, selectively, to release fluid to the sprinkler assembly when the sprinkler assembly is deployed at a predetermined attitude above the surface of the earth.

Abstract: A rotary, pop-up sprinkler is provided which includes an in-ground container. A motor is reciprocably mounted in the container and includes a stator, a plate assembly mounted on the stator and a rotor rotatably received in the stator. The rotor includes a turret with a nozzle orifice. Hydraulic pressures on the rotor are balanced whereby anti-rotational drag is substantially reduced. A speed regulator is provided for maintaining a relatively constant rotational speed when the sprinkler is subjected to variances in hydraulic pressure.

Abstract: A sprinkler including a housing, a riser and a riser seal element is disclosed. The housing has a hollow interior with an upward-inward slanted, conical shaped seal element receiving slot. The riser is mounted in the hollow interior of the housing for reciprocating motion between an extended sprinkling position and the retracted non-sprinkling position. The riser has an exterior surface along its length and the housing has an interior surface at its upper end between which a gap is defined. The riser seal element is comprised of an elastic material and has an outer portion which is held in the seal element receiving slot to thereby position the seal element in an upward, generally conical orientation. An inner portion of the seal element extends into the gap to form a seal therein for preventing the entry of extraneous material through the gap. The inner portion of the seal element is flexible between an upwardly slanted position and a downwardly flexed position.

Abstract: A variable stator for use in a sprinkler head has a two piece stator housing which includes flexible inner sidewalls overlying spaced apertures in an outer sidewall. The stator housing includes a plurality of drive ports which pass a controlled portion of the fluid flow against an impeller that is part of the drive mechanism for rotating the nozzle of the sprinkler head. The inner sidewalls flex inwardly as a function of fluid flow around the stator relative to the controlled fluid flow to the impeller to selectively open the apertures to keep the rate of rotation of the sprinkler nozzle relatively constant. By locating the impeller within the stator, upstream of the remaining fluid flow around the stator and through the spaced apertures, wear on the impeller is minimized. In addition, turbulence through and around the stator is minimized to further reduce wear and for increased fluid flow control.

Abstract: An improved rotary drive sprinkler is provided for driving a sprinkler spray head in a rotary stepping motion to deliver irrigation water over a prescribed terrain area. The rotary sprinkler comprises a pop-up stem assembly carrying the spray head and movable within a sprinkler housing between a normal retracted position and an elevated spraying position when water under pressure is supplied to the sprinkler housing. During operation, the water flowing through the sprinkler housing powers a piston drive assembly including a spring-loaded drive piston which is alternately subjected to a predetermined pressure differential and normalized pressure to displace the piston in a reciprocating manner. The drive piston is coupled to a motion converter assembly for converting the reciprocal motion of the drive piston to an oscillatory rotary motion which is coupled in turn via a reversible one-way clutch assembly to the pop-up stem assembly.

Abstract: A gear driven sprinkler head with a pop-up spray nozzle driven by a water-flow powered motor. The nozzle is rotated incrementally through an adjustable arc to irrigate a sector of a particular size, and it is automatically reversed at the end points of the selected irrigated sector. The nozzle may be interchanged with other nozzles to provide matched precipitation rates for sectors of different sizes. The feature of incremental rotation of the nozzle overcomes the problem of reduced throw distance at high rotational speeds encountered by the prior art assemblies of the same general type.

Abstract: An improved rotary drive sprinkler is provided for rotatably driving a pop-up spray head in a stepwise manner through a full-circle or reversibly within a selected part-circle path. The sprinkler includes a reversing trip mechanism having a pair of spaced-apart stops rotatable with the spray head and defining preset end limits of a part-circle path, wherein a stationary trip wire is engageable with the stops to switch an internal rotary drive assembly, such as a ball drive assembly, between forward- and reverse-drive operation. The trip wire flexes to accommodate forced spray head rotation to a maladjusted position beyond the end limits and, upon subsequent sprinkler operation, rides over ramped surfaces on the stops for automatic return to reversible operation between the reset end limits. Alternatively, the stops can be set in side-by-side relation with their ramped surfaces oriented for the trip wire to ride resiliently thereover without switching of the rotary drive assembly.

Abstract: A reversible turbine driven sprinkler unit includes a sprinkler head incorporating a nozzle that is continuously driven by a reversible turbine which continuously oscillates the head between selectable reversing stops for covering a selected part of a circle. A water turbine which is driven by the water supply to the nozzle includes a reversible stator for alternating the direction of rotation of the turbine which is drivingly connected through a gear train to the sprinkler head. A reversing mechanism includes a shifting shaft extending axially from the turbine stator through the turbine, the drive train and the sprinkler head terminating in a cylindrical cavity formed in the top of the sprinkler head in which it is positioned, in an adjustable position, reversing stops for alternately engaging a reversing arm mounted on the shifting shaft for shifting the stator of the turbine to its selected alternate positions.

Abstract: A sprinkler including a housing, a riser and a riser seal element is disclosed. The housing has a hollow interior with an upward-inward slanted, conical shaped seal element receiving slot. The riser is mounted in the hollow interior of the housing for reciprocating motion between an extended sprinkling position and the retracted non-sprinkling position. The riser has an exterior surface along its length and the housing has an interior surface at its upper end between which a gap is defined. The riser seal element is comprised of an elastic material and has an outer portion which is held in the seal element receiving slot to thereby position the seal element in an upward, generally conical orientation. An inner portion of the seal element extends into the gap to form a seal therein for preventing the entry of extraneous material through the gap. The inner portion of the seal element is flexible between an upwardly slanted position and a downwardly flexed position.

Abstract: A replaceable rotatable therapy head is disclosed wherein the operating mechanism including an impeller and a gear train between the impeller and a ring gear on the housing is supported by a ring which is integral with the emitting nozzle and the supporting ring is held to the body of the structure by means of the flange ring also bonded to the body of the therapy head. The gear train is at the downstream end of the housing and the impeller blades are at the upstream end of the housing spaced from the gear train. A water diversion means is disposed between the gear train and the impeller blades. A friction reducing ring or the like is disposed between the support ring and the housing. The system utilizing the heads, which may be at a selected acute angle, includes aerators in the supply lines for mixing the water with air.

Abstract: A hydraulically actuated device is employed as part of a pool cleaning system. An improved structure assembly of a hydraulically actuated core within a housing provides ease of manufacture and assembly. Graded control of the application of pressure and the flow of fluid through the system is provided so that the hydraulic device is actuated in a relatively gradual and graded manner to overcome the deleterious effects of abrupt actuation of such devices and the resultant water hammer, pressure surges which are generated in such abruptly operated systems. Improved jet orifices enclosed within the hydraulically actuated cylinder of the device provide for more efficient disturbance of sediments on the interior surfaces of the pool in the immediate vicinities of the hydraulically actuated devices.

Abstract: An irrigation sprinkler or water gun is retracted into an underground pit during non-irrigation periods, while the pit is closed by a heavy cover which is simultaneously lowered onto the pit opening. The sprinkler is mounted on a telescopic lifting unit which is connected to a point of an underground water supply system and is raised by water pressure as soon as this system is pressurized. The sprinkler communicates with the telescopic unit through a pressure relief valve which is opened by the water pressure only after the sprinkler has been raised to its highest point above ground. As soon as this valve opens water is admitted to the sprinkler which starts to rotate and to irrigate the area.

Abstract: An improved swimming pool mounted rotatable head for a water jet pool cleaning system adapted to rotate in a non-uniform sequential manner during a pool cleaning operation to maintain deleterious matter in suspension so that it may be removed by the main drain or skimmer inlets of the water circulation system. A means is incorporated for flushing sand and other debris from around the moving head and from the immediate pool surface area surrounding the head.

Abstract: An improved sprinkler of the type adapted to rotate and create a redefined horizontal spray pattern around it. A rotating turbine drives a cylindrical nozzle assembly having a plurality of nozzle openings therein. The nozzle openings deliver streams of water of variable length and volume. A pattern defining disk is used to continuously and proportionately expose the nozzle openings to the source of pressurized water according to a preset function of the instantaneous rotational position of the nozzle opening as the cylindrical member turns to create the spray pattern. The nozzle openings supply a relatively constant volume of water to all portions of the pattern.

Abstract: A cleaning head for installation in the bottom surface of a swimming pool includes a rotary pop-up jet producing element having a hollow cylindrical lower section open at its bottom and an enlarged cylindrical hollow upper section closed at its top. An outlet opening is disposed in a vertical cylindrical wall of the upper section. A camming pin extending from the vertical cylindrical wall of the lower section engages opposed, staggered upper and lower saw-tooth-like camming surfaces disposed along an inner cylindrical wall of a stationary section of the cleaning head. The stationary section of the cleaning head sealably engages with a housing installed in the bottom surface of the swimming pool and is sealably coupled to an intermittent high pressure water supply.

Abstract: A rotating "pop-up" sprinkler assembly having a rectangular buried container unit and a cam follower and cam track for automatically directionally aligning the sprinkler head as it returns to the container to thereby minimize the size of the container.

Abstract: Improvements in sprinkler systems having fluid under pressure flowing therethrough and a sprinkler head with a pop-up nozzle actuated by fluid pressure. An impeller is actuated by the fluid flow to rotate the nozzle and thus rotate the spray of fluid therefrom. A transmission is disposed between the impeller and the nozzle for transmitting rotation of the impeller to the nozzle. The transmission is sealed off from the fluid passing through the system by a resilient expandable diaphragm at one end. A fluid pressure responsive seal is provided in the system in sealing engagement with the nozzle. The sealed-off portion of the transmission is completely filled with a lubricating medium which is free to selectively contract or expand against the diaphragm in response to varying ambient conditions encountered by the sprinkler head. The nozzle may also include means for varying the pattern of the sprayed fluid and may be comprised of molded plastic components which may be assembled together.