Abstract: A device for protecting irrigation land local flooding caused by damaged sprinklers or broken risers. The device, in accordance with the present invention is designed to be situated within a piping component upstream of each individual sprinklers and it is completely enclosed within the piping component. The device detects and responds to the excess flow caused by damaged sprinkler or broken riser by shutting off water to the damaged sprinkler. In so doing, the device allows the remainder of the irrigation circuit to operate without interruption, albeit temporarily without the service of the damaged sprinkler. The device has no external housing and therefore the component itself is not vulnerable to physical damage from outside.

Abstract: Irrigation systems which use sprinklers can cause local flooding in the event of either a sprinkler head failure or a broken riser. The result is localized crop damage, irrigation water wastage, land erosion, and deprivation of water for the remainder of the circuit. The disclosed invention provides a method of and, a device for, protecting the irrigation land from the above mentioned potential damage. The disclosed invention comprises an automatic flow shut off device situated between the distribution joint and the individual sprinkler head. The flow shut off device detects and responds to the excess flow caused by the damaged sprinkler and subsequently isolates the water flow to the affected sprinkler. In so doing, the device allows the remainder of the irrigation circuit to operate uninterrupted, temporarily without the service of the damaged sprinkler.

Abstract: A nozzle head of thermoplastic material injection nozzle is closed in the customary manner with a closure head which has a jet orifice. A jet needle closes the jet orifice in a closed position. The needle is held axially displaceable in a needle bearing. An actuation lever is set into a slit-like recess in the needle bearing and it is supported with a bearing ball carried at the rear wall of the needle bearing. A stroke transmission bolt set inbetween jet needle and actuation lever in overhung position serves for transmitting the closing force from the actuation lever to the jet needle. Upon opening, the injection pressure pushes the jet needle rearward if the actuation lever is rotated into the open position. In this arrangement a locking spring becomes superfluous and, consequently, no force counter to the spring force must be effected by the injection force.

Abstract: A one-piece inline pressure compensating drip irrigation emitter unit comprising a regulator cylinder having an internal transversal channel member and one or more narrow trickle channels therein, the unit being disposed within a tubular fluid carrying conduit line or constituent parts thereof, provided with at least two orifices through which the line or constituent part communicates with the outside. The emitter unit provides for fluid output flow at a controlled, constant rate regardless of wide variations in the pressure of the fluid delivered to the emitter.

Abstract: A water jet injection device for use with mixed beverage dispensing machi is provided, wherein a bushing-type sealing element which fulfills several functions is placed in the injector housing. In particular, the sealing element sealingly separates the mixing chamber from the rearward section of the injector housing in a reliable manner and further acts as a nonreturn valve hermetically sealing the mixing chamber against the supply conduit for fruit syrup or concentrate when the injector in the mixing chamber is inoperative and, at the same time, the sealing element provides a seal when an intake conduit or the like is connected with the lateral intake opening of the injector housing.

Abstract: Apparatus for temporarily accessing water under pressure comprising access structure having a main outlet and a pilot pressure outlet for containing the water under pressure and water accessing structure cooperable therewith to obtain temporary access to the water under pressure. A main interengaging connection is provided for manually establishing a mechanical connection of the accessing and access structures without establishing communication of the water under pressure through the main outlet. A second interengaging connection is provided for manually establishing a controllable pilot pressure flow path through the pilot pressure outlet to the accessing structure for water under pressure contained within the access structure. A power operated assembly is mounted in the pilot pressure flow path for selectively communicating water under pressure to the accessing structure through the pilot pressure flow path.

Abstract: An air injector valve for a spa is disclosed, the valve including a body and a cap. Within the body there is a valve seat and a jumper which co-operates with the valve seat to control flow of air through the valve. The body has an externally threaded section which screws, from above, into a nut positioned below an aperture in the shell of the spa. A flange at the upper end of the body prevents the valve body passing right through the aperture in the shell. The cap can be unscrewed from the body and, once this has been removed, access to the spring and jumper from within the spa is possible. The valve body cannot fall through the aperture in the shell as it remains supported by the flange.

Abstract: A liquid filling nozzle comprising a vertical tubular nozzle main body having a reduced diameter portion at an intermediate portion of its height, a damper attached to the lower end of the nozzle main body and pivotally movable upward and downward, a resistant member extending within the nozzle main body from the reduced diameter portion to a portion therebelow and movable upward and downward for acting against a liquid flowing downward, a member connecting free ends of the damper to the resistant member, and a resilient member biasing the resistant member upward.

Abstract: A flow regulator comprises a housing having a passageway for a fluid flowing therethrough from its inlet to its outlet; a resilient sealing member circumscribing the inlet to the passageway; and a flow regulator member overlying the passageway inlet and spaced therefrom by a plurality of axially-extending teeth carried by the flow regulator member. The teeth are spaced circumferentially around the passageway inlet and are engageable at their outer edges with the resilient sealing member such as to define flow paths in the spaces between the teeth. The flow regulator member is movable axially of the passageway in response to the difference in pressure on its opposite faces to press the teeth to different depths into the resilient sealing member and thereby to regulate the flow through the flow paths by varying the dimensions of the spaces between the teeth.

Abstract: Apparatus for enabling a sprinkler head assembly to be detachably mounted on an irrigation system riser pipe containing water under pressure in accessed relation to the water under pressure within the riser pipe. The apparatus comprises an access assembly adapted to be rigidly secured to the riser pipe and an accessing assembly adapted to be rigidly secured to the sprinkler head assembly. The access assembly includes separate main and pilot pressure valve mechanisms containing the water under pressure within the riser pipe. Both assemblies include detachable interengaging connectors for establishing a mechanical connection between the two assemblies by a simple and convenient manual movement. The accessing assembly includes a quick connection fitting for accessing the water under pressure through the pilot pressure valve mechanism which is mounted in a cooperating quick connection fitting.

Abstract: A pressure regulator-reducer in a first embodiment comprises two pistons (6, 7) provided with elastically deformable rings (9, 10) mounted in a bore (5) and held by a spring (12) bearing against a bulkhead packing (13) surrounding an outlet orifice (16). The double piston defines three chambers (19, 20, 21) respectively in communication with the product under pressure, the atmospheric pressure and the outlet. Facing the ring of the piston (6) on the outlet side there is provided a narrow longitudinal slot (24). A second pressure regulator-reducer is also disclosed that uses a slide mounted in a bore. The side has a piston and a spaced shoulder. The shoulder and piston controls flow along the bore to a dispensing orifice. A spring, mounted in the bore, controls the movement of the side in response to fluid flow.

Abstract: An injection hose for construction joints in concrete structures includes an essentially liquid-impermeable base structure of flexible material such as rubber or synthetic material and defining a passage duct. The base structure has along its length radial openings for the escape of injection liquid from the passage duct and, along its length in the area of the radial openings, at least one longitudinal depression for receiving a strip of a material which is compressible under the pressure of the injection liquid and which covers the openings. A hose of liquid-permeable material surrounds the base structure and strip. A plurality of radial openings are provided in the base structure, and the associated depressions and strips are distributed around the circumference of the base structure angularly symmetrically in relation to the central longitudinal axis.

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: A scheduled fluid control valve which performs a pre-established sequence of flow rates and timing schedules in response to pressure pulses in the controlled fluid. The valve consists of a generally cylindrical housing connected to a source of pressurized fluid and containing circular plates of cylindrical control surfaces coupled to actuating means responsive to the presence of pressurized fluid. The actuating means includes an actuator plate or cylinder, a biasing spring, and a longitudinal shaft or cylinder upon which is incised at least one generally helical groove within which track one or more follower pins. Pressurized fluid causes the actuator plate or cylinder to rotate, following the path defined by the helical groove, resulting in relative movement of the control surfaces whereby the schedule embodied in the relative size and placement of fluid ports through the control surfaces is performed.

Abstract: A hydro-automatic valve with a cylindrical housing mounted vertically and having rigid upper and bottom ring shaped rests between which, within the cylindrical housing, interconnected upper and bottom face closure members are freely disposed. The upper face closure member is shaped as a disc with a hole in the central axis and has small legs arranged around its periphery extending vertically downwards with small teeth turned inwards towards the central axis. The small teeth are disposed freely in a shallow ring shaped groove in the surrounding surface of the bottom face closure member, which is shaped with a conical peak in the axis. At the bottom end of the bottom face closure member there is a deep ring shaped groove. This deep ring shaped groove is connected via parallel channels with the space between the upper and bottom face closure member.

Abstract: A flow regulator comprises a sleeve fixed within a body member and formed with an opening serving as a metering passageway, a second sleeve displaceable with respect to the fixed sleeve so as to vary the effective size of the metering passageway, a spring biasing the displaceable sleeve in the direction to enlarge the met metering passageway, and a flow sensor element carried by the displaceable sleeve and impinged by the flowing fluid so as to displace the second sleeve in the direction of restricting the metering passageway. Also described is a spray nozzle including the above flow regulator, and a deflector floatingly mounted so as to be impinged by the jet issuing from the spray nozzle.

Abstract: 'An aerator has a pressure responsive valve assembly therein for restricting the flow therethrough when the pressure of the water supply is increased. The aerator includes a housing mounting a stream straightener member and a partition member. The partition member seats an annular O-ring which in turn seats a movable valve element. The valve element and partition define an assembly with a variable sized passageway. The valve element is responsive to pressure from the pressure source to compress and move the O-ring to constringe the passageway. A mixing body is movably mounted between the stream straightener and the partition member for mixing water from the passageway with air. The valve element has a depending leg which is manually operable from the outlet of the housing. The leg can be pressed upwardly to lift the valve element which opens up the passageway thereby creating turbulence in the aerator.

Abstract: A fast acting ink valve adapted to be used in conjunction with the nozzle of an ink jet printing system is disclosed. A flexible diaphragm modulates flow through a valve chamber. A spring biases the diaphragm to a sealed position to prevent flow. Ink pressure in the marking system unseals the diaphragm permitting flow. Unlike check valves, the invention has minimal pressure drop due to the location of the bias spring outside the ink flow path.

Abstract: A valve device to control fluid through a passageway under a pressure head which may vary, has at least one vane which lies in the passageway to restrict the fluid flow. The vane is effectively flexible and resilient to deflect under fluid flow and so increase its restricting effect on increase in the pressure head and decrease its restricting effect on decrease in the pressure head so as to maintain a substantially constant flow output through the passageway.The valve device may be incorporated in a nozzle for insertion as one of a series along the length of an irrigation pipe, and the nozzle may be provided with a pointed head part and an outlet tube or cap.The device also has application in other forms of fluid control.

Abstract: A sprinkler system for plants and schrubs growing on the side of a hill has non-drain valves connected at discharge heads that are positioned at elevations below the main control valve for the system. The non-drain valves are opened by pressure of water exerted when the main control valve is opened. After the main control valve is closed and water pressure in the pipe system that feeds the discharge heads falls to a selected value, the non-drain valves automatically close, thereby preventing drainage from the discharge heads of water retained in the pipe system between the relatively low discharge heads and the relatively high control valve.

Abstract: Liquid gas-operated lighter, particularly pocket lighter, comprising a closable valve at the opening of a valve bore which valve is in communication with a burner tip, a fuel tank and a non-adjustable control device for the flame height arranged between tank and valve bore. The control device is provided with a fuel-permeable proportioning disk of porous material which, on its side facing the fuel tank, is tightly pressed in its border region against a surface which is ring-shaped, preferably circular ring-shaped, by means of a structural component having a passage for the fuel. The annular surface (13) surrounds a recess (12a), which has an end face; the end face, together with the recess and the proportioning disk (14), forms a proportioning chamber which is in communication with the burner tip (4) exclusively through the valve bore (11).

Abstract: A valve for connection to the boom of a crop spraying aircraft for emission of chemicals includes a pressure actuated valve member disposed therein in order to provide positive flow of the chemicals when pumped through the valve and positive dripless turnoff when the pressure is removed from the chemicals. Further, the valve is produced in two pivotally connected sections having a gauge disposed thereon for controlling the spray angle of the emitted chemicals and to thereby adjust the swath covered at each pass.

Abstract: In a water sprinkler device having a nozzle housing and an outlet aperture of said housing; a nozzle unit comprising, a resiliently flexible annular member, a resiliently flexible intermediate tubular portion and a nozzle outlet tube, the annular member merging continuously with the outlet tube via the intermediate tubular portion and defining with the outlet tube and the intermediate tubular portion a continuous bore, the outlet tube extending through the outlet aperture of the housing, the annular member being located within the housing so as to abut a rim of the outlet aperture.

Abstract: Improvements are provided in a sprinkler head assembly including a hollow sprinkler head assembly tube, a sprinkler tip secured in the upper portion of that tube and a valve secured in the lower portion thereof. The sprinkler tip body is secured in the upper portion by cooperation between a securing structure which depends from the sprinkler tip, (e.g., a central tube having an internally threaded bore, the tube having a slit through the walls at its lower end forming bifurcated portions provided with a pair of wings, each having an upwardly facing abutting shoulder thereon), and retainers on the inner wall of the hollow sprinkler head assembly within the upper portion thereof, (e.g., a downwardly facing abutting shoulder spaced downwardly from the upper end of the tube) with an actuator for urging the securing structure into engagement with the retainers (e.g.

Abstract: This invention concerns a non-return valve having a directional injector, comprising a body provided with a valve seat.

Abstract: The disclosure is directed to a sprinkler head for a center pivot irrigation system capable of operation under high or low water pressure. A plurality of sprinkler heads are employed in the system, each of which includes a housing defining a water outlet and constructed to issue a jet of water therefrom. A spray deflector is carried in overlying relation to the outlet by an external frame secured to the housing in a position to intercept the jet of water and deflect it into a predetermined spray pattern. The spray deflector is movable relative to the outlet between a first position protectively covering the outlet and a second position spaced from the outlet to create the spray pattern, the spray deflector being movable from the first position to and maintained in the second position by the jet of water, and returnable to the first position by gravity.

Abstract: This disclosure relates to a flow control device in which the discharge from the nozzle is kept at essentially the same volume rate of flow in spite of fluctuations in the hydraulic pressure upstream from the device by providing a spray body that has a group of radially disposed channels which are perpendicular to the general direction of flow. A flexible spray control washer spaced upstream from these channels responds to hydraulic pressure by pressing into the channels and restricting the flow area of each of these channels in proportion to the applied hydraulic pressure. In this way, the flow area within the chamber is inversely related to the hydraulic pressure in order to maintain a continuous volume rate of flow through the device.

Abstract: A fluid distribution system is described including a plurality of utilization devices, such as water sprinklers or drippers, supplied with pressurized fluid, characterized in that the inlet pressure to the utilization devices is substantially equalized by the provision of pressure-equalizer valves. Each valve includes means for producing a pressure drop having a first component compensating for the pressure change due to the elevation of the utilization device, and a second component compensating for the pressure drop due to the distance of fluid flow to the utilization device. Also described are pressure-equalizer valve constructions producing pressure drops having the above two components.

Abstract: An emitter of very small size connects to a water supply tube by a hollow shank which conducts water to an interior chamber in the emitter housing. Between the chamber and an outlet in the housing the water flow is throttled through an elongated channel having both a wide shallow profile and a narrow steep profile. A free floating (within limits) resilient wafer covers the channel. At initial, very low water pressure at start-up, the wafer does not flex into the channel, thereby affording maximum flow to purge the emitter of unwanted dirt particles and the like. At relatively low operating pressure the wafer flexes into the wide shallow portion of the channel, reducing the flow to a predetermined amount, such as one gallon per hour. At relatively high pressure the wafer flexes further, intruding into the narrow steep slot, thereby compensating for the increased pressure and maintaining fluid flow at said predetermined rate.

Abstract: A device to control the flow of fluid uses a cam and ratchet wheel. A valve is operated by the cam portion of the wheel, which bears against the valve stem causing it to open. Fluid flow causes a pawl to drive the ratchet portion of the wheel, rotating the wheel until the valve stem bears against a low point in the cam, permitting the valve to close. A part of the ratchet portion does not contain ratchet teeth, in which area the pawl cannot drive the wheel. In this area, the cam has an increasing radius from a radius corresponding to a closed valve, to a radius corresponding to a fully open valve. This permits manual control of fluid flow without disengagement of the device.

Abstract: A control system for automatically regulating a spray gun paint pressure in which an ideal pressure value is represented by a current flow in a collection line and the real pressure value is represented by a voltage signal that sets a voltage to current transducer via which the collector line current flows. A bypass resistor is connected to the collection line across the inputs of a differential amplifier in a control circuit that controls a supply and exhaust valve for the spray gun paint pressure. As collector line current flows via the voltage to current transducer decreases consistent with the real pressure value being reduced relative to the ideal pressure value, increased current flows via the bypass resistor, thereby increasing the voltage potential across the inputs of the differential amplifier to cause the control circuit to operate the supply valve and accordingly increase the real pressure value to the level of the ideal pressure value.

Abstract: An automatic pressure responsive shower head includes an outer housing and a body member positioned within the housing and attached thereto. The body member has a water discharge at one end and is connected to a swivel member at the other end. There are water passage means within the body member between the swivel member and the body member water discharge. A water pressure responsive control member is positioned within the body member and is effective to control the flow of water through the body member water passage.

Abstract: An irrigation system and method is disclosed having a water supply source for providing water under pressure to a plurality of dispensing devices located at spaced locations. The irrigation system and method comprises a distribution conduit grid in fluid communication with the water supply source and defining a closed conduit loop, thereby providing water flow upon demand within the distribution conduit in more than one direction. The distribution conduit grid is composed of arterial members formed in a closed conduit loop for supplying water to a plurality of dispensing conduit members, each dispensing conduit member having its ends interconnected between two spaced locations on the arterial conduit members, thereby providing water flow into the dispensing conduit members from more than one direction. The dispensing devices are mounted on the dispensing conduit members in water supply relation. The dispensing devices are operated between open and closed positions by a water operated pilot valve.

Abstract: A shower head assembly having a flow regulator for maintaining a flow rate through the shower head within preset limits, substantially independent of variations in supply pressure and operating temperature. The flow regulator includes a flow controller element disposed in a regulating chamber, biased in one direction by a metallic spring and urged in the opposite direction by supply pressure. The controller element cooperates with an outlet passage in the regulating chamber to form a variable orifice, reducing the effective area of the outlet in response to increased supply pressure. A retainer screen keeps the flow controller and biasing spring in place while serving as a protective filter.

Abstract: The disclosure is directed to a center pivot irrigation system capable of operation under high or low water pressure and a constant volume sprinkler head therefor, which together provide uniform water distribution over an agricultural field notwithstanding the presence of hills and valleys in the field, pressure fluctuations of the water source, friction losses or the direction or magnitude of the wind. The system employs a plurality of sprinkler heads each of which provides a constant volume of water to the annular area over which it travels. Because the annular areas increase in size and total water requirements with increasing distance from the center pivot, the water delivering capacity of each sprinkler head is chosen as a direct function of its radial distance from the center pivot, thus insuring the same water distribution to all points on the field. Each sprinkler head is designed to produce a spray pattern that extends laterally outward with a predetermined directional orientation.

Abstract: An agricultural irrigation system having a fluid dispersion nozzle for controlling the flow rate and generating a resultant fluid stream characterized by uniform dispersal along the stream path. The nozzle has a housing member (10) which defines an inlet passageway (16), a nozzle outlet orifice (32), and an intermediate fluid chamber (30). A resilient flow control member (34) is located within the fluid chamber (30) and has an orifice (36) centrally located therein and axially aligned with the inlet passage (16) and the nozzle orifice (32). The nozzle orifice has located along the inner periphery thereof a plurality of circumferentially equally spaced and radially inwardly projecting deflector members (38, 40, 42) which are effective for reducing a portion of the resultant fluid stream velocity therethrough. The fluid dispersion nozzle is mounted on a rotary sprinkler head (50) which receives a supply of pressurized irrigation fluid from an irrigation system primary conduit (56).

Abstract: A fluid pump dispenser includes a nozzle structure having a flexible member which functions as an outlet check valve and O-ring seal, and which cooperates with a threaded nozzle cap to vary the discharge pattern of the dispenser responsive to twisting adjustment of the cap. Fluid is discharged through the nozzle structure by actuating a trigger to reduce the volume of a pump chamber in communication with the outlet check valve. The volume of the pump chamber may be reduced by operating a piston within the chamber or by flexing a wall of a tubular member having an open end in communication with the outlet valve.

Abstract: The present invention discloses a sprinkler head for use in drip irrigation systems. Irrigation fluid entering an inlet is directed through a path comprising a plurality of pressure dropping chambers before emerging through irrigation tubings connected to outlet openings from where the irrigation fluid emerges at a low pressure drip irrigation flow rate. In the preferred embodiment disclosed, the pressure dropping chambers comprise a plurality of series interconnected vortices disposed within stacked plates. The entire assembly can be disassembled for cleaning purposes. The assembly further incorporates an integral pressure regulator for performing an initial step decrease in the pressure of the irrigation fluid before the fluid enters the multiple chambered pressure dropping path. The integral pressure regulator is adjustable and calibrated in gallon per hour flow rates.

Abstract: A valve having a translatable annular slot communicates with discretely shaped and judiciously located elongated, variable width slots for metering fuel to individual fuel nozzles in a burner of a jet engine without changing the fuel scheduling characteristics of the fuel control. The valve can have sequential lighting capabilities in the event that the burner is designed with this feature.

Abstract: An improved self-flushing, constant flow emitter particularly suited for use with a drip irrigation system. The emitter includes an internal chamber having a discharge orifice defined therein and a resiliently supported plunger disposed within the chamber adapted to respond to pressure changes for simultaneously metering a flow of water through the orifice and dislodging foreign matter from the orifice.

Abstract: A flow controller, for limiting total maximum water flow through a domestic flow appliance, is provided by a molded flexible body shaped to provide a deformable central flow orifice and an outermost sealing section that is adapted to be operatively positioned at the joint between a supply conduit and the flow appliance, such as a showerhead, aerator, or the like. Associated with the flow controller are: (1) an annular tubular support for positioning the portion of the flexible body with the deformable central flow orifice upstream of the sealing section, and (2) a cavitation noise reducer located immediately downstream of said central flow orifice. The cavitation noise reducer has specific construction features for use with specific appliances, and may also be provided with a downstream tubular flow straightener, or simulator, of selected length and width dimensions to effectively develop a frictional effect that reduces undesirable sound that normally accompanies use of a flow controller.

Abstract: A distributor, notably for use in a sprinkling or like system, for causing a liquid to flow successively through a first orifice, then through a second orifice, but only after a predetermined quantity of liquid has passed through the first orifice. This distributor comprises a volumetric metering device comprising a piston movable in a first direction under the influence of the liquid pressure from the inlet orifice to a first orifice via an open valve, a chamber and a passage. A piston comprises a rod provided with a push member capable of moving a control member in the first direction, this control member being then driven for rotation by a driving member coupled kinematically to a turbine. Simultaneously, the driving body closes the valve and after a predetermined rotation of the control member the cavity thereof registers with the push member and the rod can move freely in the first direction and close the first outlet orifice while opening the second outlet orifice.

Abstract: A control valve for a water sprinkler has a passage therethrough and a rotary member under the control of a stepping motor or equivalent rotatable to increase and decrease the area of the passage. A sensor detects the output pressure at the valve and at a predetermined pressure reverses the direction of rotation of the stepping motor and rotary member.

Abstract: A mobile irrigation system of the type including an elongated horizontal water conduit assembly having support structure spaced therealong for support from and movement over the ground is provided. One end of the water conduit assembly may be communicated with a source of water under low pressure and a plurality of discharge pipes are supported from the assembly at points spaced therealong and open upwardly and outwardly from the interior of the conduit assembly. A plurality of motor driven generally horizontal and centrally apertured discs are journaled from the assembly and the discharge pipes project upwardly through the central apertures in the discs.

Abstract: Showerhead apparatus includes a deformable washer and a metering orifice to provide a substantially constant flow of aerated water over a wide range of pressures of the water supply line.

Abstract: A high pressure adjustable nozzle utilizes a vented piston valve in cooperation with a low torque hand adjusting cam element and control pin to easily open and close the nozzle orifice. Fluidic line pressure is applied to the fore and aft section of the piston valve to create forces which can adjustably regulate the flow of the nozzle from an infinitely variable full open valve position to a full closed valve position.

Abstract: A pressure compensating emitter comprises a generally cylindrical body member having a longitudinal passageway therethrough connecting an inward port and an outward port and a flexible pressure responsive boot mounted within the passageway for responding to increases in pressure within the boot or cup for biasing the walls of the boot into a water flow passageway and restricting the passageway communicating between the inlet and outlet ports in the body of the emitter.

Abstract: A pulsating spray nozzle has a number of features including the introduction into the outer periphery of a forced vortex of a speed-control fluid. In such a forced-vortex environment, a floating turbine is enabled by means of paths correlated with outlet openings better to avoid stalling. Improved dimensioning of elements in the forced-vortex-turbine approach also contributes in that direction. A regulator limits the rate of flow of fluid through the device to a predetermined maximum amount upon increase of incoming water pressure beyond a selectable level.

Abstract: Apparatus for controlling the spraying of water or other fluid from a tank truck or other reservoir. A plurality of valves may be turned on with a single pump and individually turned off as desired during spraying operations, by the application of air pressure to control lines leading to the individual valves. The spray valves are individually adjustable for control of the flow rate, direction and pattern of spraying, and are so constructed as to minimize malfunctions from jamming of the valve mechanism experienced with other valves while spraying in a sandy environment.

Abstract: Disclosed is an apparatus for the intermittent aeration of sewage or sewage-activated sludge mixtures. The apparatus is adapted to be disposed below water level and consists of a horizontal air distributor in the form of a pipe jacket closed tightly at both ends except for an aperture for the air supply, and which, in the area of its two opposite lateral longitudinal edges, includes apertures for the passage of air. The apparatus further includes an elastic air distributing foil covering the apertures for the passage of air and the upper portion of the pipe jacket located between the apertures. The foil is provided with air escape openings which are opened by the air supply to the pipe jacket and closed in case of interruption of the air supply by being sealed against the pipe jacket outside the area of the air passage openings.