Abstract: An irrigation emitter and drip line, and methods relating to same, are provided for reducing the flow and pressure of fluid via an emitter or plurality of emitters defined by two concentric tubes. In one form, the first tube defines an emitter inlet and connected pressure-reducing flow channel and the second tube is extruded over the first tube to enclose the emitter inlet and flow channel and defines an outlet connected to an end of the flow channel opposite the inlet to create an emitter for converting fluid flowing at a high flow rate in the lumen and at the first end of the inlet to a fluid with a low flow rate at the outlet of the emitter. In another form, a drip line is provided having a plurality of such emitters. Various other forms and methods relating to the emitter and drip line are also disclosed.

Abstract: A drip emitter for subsurface irrigation includes a valve chamber defining a hollow interior, an entry port and at least one exit port. A flexible diaphragm is mounted in the hollow interior of the valve chamber for movement in response to pressurized water being supplied to the hollow interior through the entry port. The drip emitter further includes a tortuous path water flow channel that limits the flow of water from the hollow interior of the valve chamber to the at least one exit port. A closure member is moved by the flexible diaphragm to open the at least one exit port when pressurized water enters the hollow interior to allow water to be discharged through the at least one exit port. A spring moves the closure member to close the at least one exit port when the supply of pressurized water is shut OFF.

Abstract: A drip irrigation tube is provided with metering elements comprising respectively inlet regions, through which the water in the tube arrives in the metering elements, metering regions, formed by a labyrinth channel, which is delimited by two lateral walls, a cover and the walling of the drip irrigation tube and in which a pressure reduction of the water flowing through takes place, and outlet regions, through which the water emerges out of the drip irrigation tube via outlet openings made in the tube walling. The respective outlet region borders at least on one lateral wall, of the labyrinth channel; at least one region of this lateral wall is covered by an elastic membrane forming a portion of the cover, so that the lateral wall is able to be lifted off of the tube wall by means of the elastic membrane and forms a passage through which the water from the labyrinth channel arrives directly in the outlet region.

Abstract: A fluid flow emitter is provided, which is to be mounted within a fluid distribution tube to control the rate at which fluid is distributed from the tube. The emitter may include a cylindrical body having a pair of raised radially-extending annular portions extending circumferentially around the emitter. These raised portions define a fluid flow path. The body may define a multiplicity of apertures making up an aperture region disposed between the radially-extending annular portions. A flow control section is also provided which includes an upstream end and a downstream end. A fluid distribution region is also provided, into which the flow control section discharges. The fluid distribution region is in fluid interconnection with at least one orifice defined in the fluid distribution tube.

Abstract: Apparatus 11 and 13 for interfacing two AC sources with two AC loads 17a 17b in the form of solenoid operated valves over a single conductor 25, with a return conductor 19 in an irrigation system is disclosed. The apparatus has an encoder circuit 11 with two inputs 21a 21b for connection to the two AC sources, and an output 23 for connection to the single conductor 25, and a decoder circuit 13 having an input 27 for connection to the conductor 25, and two outputs 29a 29b for connection to loads 17a 17b respectively. When the first input 21 a is powered, the first load 17a will be switched on, and when the second input 21b is powered, the second load 17b will be switched on. The decoder portion 13 incorporates switching circuits 43a 43b, interfaced with turn on delay timers 45a 45b respectively, to delay operating the loads at switch on, and turn-off delay timers 47a 47b to hold the loads on after switch off.

Abstract: There is provided a cleaning apparatus for unclogging an irrigation emitter inlet filter by dislodging or crushing or breaking a trapped solids. In some embodiments, a ram pushes the trapped solids out of a fluid inlet of the emitter. In other embodiment, a constriction provided for retaining a particle has a changeable interior cross section. By changing the cross section of the constriction, the constriction is unclogged. In alternative embodiments the filtration member may include two rigid members moving in relation one to the other or the filtration member may be elastic. In further alternate embodiments the cleaning may be activated automatically or manually.

Abstract: A system for generating digital models of nitrogen availability based on field data, weather forecast data, and models of water flow, temperature, and crop uptake of nitrogen and water is provided. In an embodiment, field data and forecast data are received by an agricultural intelligence computing system. Based on the received data, the agricultural intelligence computing system models changes in temperature of different soil layers, moisture content of different soil layers, and loss of nitrogen and water to the soil through crop uptake, leaching, denitrification, volatilization, and evapotranspiration. The agricultural intelligence computing system creates a digital model of nitrogen availability based on the temperature, moisture content, and loss models.

Abstract: An irrigation drip emitter, and methods relating to same, are provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. The emitter having at least one movable member for compensating for fluctuations in supply line fluid pressure. In one form the movable member includes a tapered baffle section movable between a first position wherein fluid is allowed to flow over the tapered baffle section and a second position wherein fluid is prevented from flowing over at least a portion of the tapered baffle section and the tapered baffle section effectively lengthening the extent of a pressure reduction passage. In another form, first and second movable members are provided for compensating for such pressure fluctuations. In another form, a plurality of inputs are provided which are movable between first and second positions to compensate for such pressure fluctuations.

Abstract: A drip irrigation emitter may be provided with a coupler for bonding to an inner surface of a conduit. The emitter may include for example a button flow restrictor. The coupler may optionally provide an outlet zone on the conduit surface that is large enough for automated perforation. Bonding the emitter to the surface of the conduit may have a minimal effect on the dimensions and/or properties of the conduit. A button drip irrigation emitter may optionally include a two part labyrinth. The labyrinth may for example be confined between a cylindrical surface and a cover and/or wind between intermeshing baffles on the cover and/or the surface.

Abstract: A dripper for drip irrigation according to the present invention comprises a first member and a second member that are formed integrally from a resin material, and includes an inter-member flow passage formed between the members. The first member is provided with a first plate and a pipe that guides an irrigation liquid, which flows in from an inflow part, to the inter-member flow passage. The second member is provided with a second plate and a discharge port. The first member is further provided with a flow regulation valve that regulates the flow of the irrigation liquid, and the second member is provided with a flow-volume control valve that controls the flow volume of the irrigation liquid.

Abstract: The irrigation matter (1) of the present invention is inserted and welded in the interior of a drip irrigation pipe (2) during production thereof. It has a number of protrusions (8) arranged in a row emerging from a solid flat part/base (6) of the outer convex surface (7) of the emitter (1). The pipe (2) is locally swollen, covers and is welded both on the protrusions (8) and on their base (6), so that a unified welded assembly is formed between protrusions (8) and the pipe. The water outlets (10) are typically and preferably formed between the prismatic protrusions (8) by cutting off the tips of the protrusions (8) during passage of the drip irrigation pipe in a continuously rotating concave fraise (35) located at the end of the production line. Cutting takes place after the pipe has passed through a system of successive pairs of concave and convex rollers which squeeze it, stretch it and make it rigid, maintaining it in a flattened convex and bent form.

Abstract: An irrigation system is disclosed having a pipe and a continuous tape of irrigation emitters that is affixed to an inside surface of the pipe and extends along its length. The pipe includes a plurality of fluid outlet ports, with one output port for each emitter in the tape. Each emitter includes a base member that is affixed to the inner surface of the pipe to create an enclosed fluid flow channel between the inner surface of the pipe and the base member. For each emitter, the fluid flow channel extends from a fluid inlet port, though filtering, flow regulation and collection sections, and to one of the fluid outlet ports formed in the pipe. The flow regulation section is formed as a labyrinth path and established which reduces the deposition of particles in the emitter which can reduce flow and/or clog the emitter.

Abstract: A flow valve that maintains a constant flow valve despite varying pressures at its inlet, comprising: (a) an elongated cage with alternating axially-extending pockets and ridges on its inner surface; and (b) an elongated generally conical shaped elastomeric sleeve received within the elongated cage; wherein the sleeve flexes outwardly at higher pressures, thereby decreasing the size of the flow channel between the sleeve and cage, thereby restricting flow to maintain constant flow valve despite varying inlet pressures.

Abstract: A soaker hose with scalable permeable surface area and method for selecting and controlling which areas to be watered. The soaker hose with scalable permeable surface area and method includes a hose having a wall with a plurality of perforations disposed about and through the wall and along the length of the hose and also having ends and a passageway extending though the length of the hose and through the ends, for moving water to specified locations; and a sheathing arrangement including at least one sleeve movably disposed about the hose to prevent the water exiting through the perforations which are covered by the at least one sleeve.

Abstract: A pressure compensating drip emitter for controlling fluid flow through a hole in an irrigation line includes an enclosing sidewall that has two ends, surrounds a volume, and is formed with an internal ledge between the ends to support an elastomeric membrane. A pressure-reducing fluid passageway that is formed as a labyrinth is provided that includes an outer, annular portion that is in fluid communication with an emitter inlet and an inner annular portion that is in fluid communication with an emitter outlet. The membrane is deformable between a first low-pressure membrane configuration which allows fluid to bypass the inner annular portion in flowing from the outer portion to the outlet. In a second high-pressure membrane configuration, the deformed membrane covers the inner fluid passageway forcing the fluid to flow through both the outer and inner fluid passageway portions.

Abstract: A dripper obtained by incorporating together a first member and second member, which are both resin moldings. The first member is on the side into which an irrigating solution flows, and the second member is on the side from which the irrigating solution is discharged. The dripper has an inflow part having a low-pressure stop filter function, and/or a diaphragm part for narrowing a flow path by elevating the hydraulic pressure of the irrigating solution. The dripper makes it possible to stabilize the amount of irrigating solution discharged, irrespective of the hydraulic pressure of the irrigating solution, and also makes it possible to reduce costs.

Abstract: A drip emitter for subsurface irrigation includes a valve chamber defining a hollow interior, an entry port and at least one exit port. A flexible diaphragm is mounted in the hollow interior of the valve chamber for movement in response to pressurized water being supplied to the hollow interior through the entry port. The drip emitter further includes a tortuous path water flow channel that limits the flow of water from the hollow interior of the valve chamber to the at least one exit port. A closure member is moved by the flexible diaphragm to open the at least one exit port when pressurized water enters the hollow interior to allow water to be discharged through the at least one exit port. A spring moves the closure member to close the at least one exit port when the supply of pressurized water is shut OFF.

Abstract: An assembling machine for assembling an elongated module into a tubular body includes a holding assembly disposed on a base for holding the tubular body, a conveying assembly slidably connected to the base and having a cantilever for holding the elongated module and adapted to extend into the tubular body through a first opening thereof with the elongated module partially protruding from a second opening thereof, and a dispenser positioned between the cantilever and the holding assembly for dispensing adhesive on a joint surface of the elongated module. The holding assembly is adapted to drive the tubular body to move to a pressed position, so that an inner surface of the tubular body is pressed against the joint surface of the elongated module.

Abstract: An improved fill valve has a pivot valve body that is pivotally suspended immediately below a float housing and is movable between two positions. In a first position, the pivot valve body blocks the flow of water from the float housing. In a second position, the pivot body allows the flow of water from the float housing. The pivot valve body has two top compartments, each separated from the other by a wall. The first compartment retains an amount of water in it. The second compartment functions as a water flow restriction apparatus and includes an upwardly-extending member for sealing off a check valve that is disposed within the bottom of the float housing. A pressure compensating drip emitter allows water to trickle into the float housing at a very slow rate. The emitter comprises a labyrinth structure having a plurality of serpentine pathways formed in its outer surface.

Abstract: A fluid supply line is provided to reduce the labor and cost required for dripline system installations by providing predetermined fitting locations where driplines can be attached. The supply line consists of a conduit having a side wall, a connector extending through the side wall of the conduit, the connector having a conduit connecting segment extending outside the conduit and an inlet segment extending into the conduit, and the inlet segment being connected to the side wall of the conduit.

Abstract: A method for manufacturing high speed pressure compensator-type drip irrigation tubes and the tubes obtained thereby having absolute radial orientation of molecular chains, the orientation imparting strength as well as flexibility to the tube material. The said method comprises extruding a tube using a plurality of extruders; blowing up the extruded tube by introducing a pressure inside the tube relatively higher than the pressure outside the tube; drawing the blown tube simultaneously to the blowing of tube; flattening the blown tube by heat welding the collapsed halves together and forming a tape immediately, subsequent to the process of blowing and drawing the tube; extrusion of a bonding polymer on one border of the tape; printing flow channels into the hot and viscous bonding polymer; and forming a tube by lengthwise folding the tape and heat welding the overlapping borders together using the bonding polymer.

Abstract: An apparatus is supplied for a self adjusting regulator suited for an irrigation emitter. A curved flow channel is integrated into a concave dome shaped surface. A deformable member deforms to approach the surface to adjust the resistance to flow. The concave dome shaped surface may match a deformed shape of the membrane. Irregularities in the interface between the surface and the deformable member are configured to achieve a desired discharge under varying flow conditions. The deformable member may activate an inlet filter cleaner by pushing a ram and thereby unclogging the filter.

Abstract: A water hydrant flushing device is disclosed. The device handles a flow of water from a water hydrant as it is being flushed, and allows the flushing to take place in a safer manner without destroying surrounding landscaping or other objects. The device comprises a chute that is open on both ends, and an opening on one end that is removably connected to a diffuser by means of a securing mechanism.

Abstract: A drip irrigation emitter receives liquid flowing in an irrigation pipe at an inlet pressure and emits the liquid out of the emitter at an outlet pressure lower than the inlet pressure. The emitter has a flow path through which the liquid flows in the emitter, wherein below a threshold pressure of liquid in the pipe the emitter is adapted to emit a regulated flow of liquid out of the emitter, and above the threshold pressure of liquid in the pipe the emitter is adapted to emit a non-regulated flow of liquid out of the emitter.

Abstract: An agricultural drip emitter optionally includes an elastomeric having a flow restriction. Flow through the emitter, when deployed inside an irrigation hose, is optionally regulated by pressure-responsive deformation of the elastomer. The flow restriction optionally includes under-tooth bypass spaces located between a base and a sequence of baffles. Some implementations also include a rigid polymer component. Optionally, a thermoset elastomer component is mechanically interlocked with the rigid component. The elastomer component and the rigid component are optionally molded as a unitary part by two component injection molding. Optionally, in the molding process, a divider initially divides the mold into two cavities. After forming the first component, the divider is optionally repositioned for forming the second component with an interface to the first component. The sequence of baffles is optionally formed by elastic stripping from an undercut mold.

Abstract: A pressure compensating drip emitter for controlling fluid flow through a hole in an irrigation line includes an enclosing sidewall that has two ends, surrounds a volume, and is formed with an internal ledge between the ends to support an elastomeric membrane. A pressure-reducing fluid passageway that is formed as a labyrinth is provided that includes an outer, annular portion that is in fluid communication with an emitter inlet and an inner annular portion that is in fluid communication with an emitter outlet. The membrane is deformable between a first low-pressure membrane configuration which allows fluid to bypass the inner annular portion in flowing from the outer portion to the outlet. In a second high-pressure membrane configuration, the deformed membrane covers the inner fluid passageway forcing the fluid to flow through both the outer and inner fluid passageway portions.

Abstract: An irrigation system is disclosed having a pipe and a continuous tape of irrigation emitters that is affixed to an inside surface of the pipe and extends along its length. The pipe includes a plurality of fluid outlet ports, with one output port for each emitter in the tape. Each emitter includes a base member that is affixed to the inner surface of the pipe to create an enclosed fluid flow channel between the inner surface of the pipe and the base member. For each emitter, the fluid flow channel extends from a fluid inlet port, though filtering, flow regulation and collection sections, and to one of the fluid outlet ports formed in the pipe. The flow regulation section is formed as a labyrinth path and established which reduces the deposition of particles in the emitter which can reduce flow and/or clog the emitter.

Abstract: A filtration irrigation method, filtration irrigation device and the manufacturing method thereof, said filtration irrigation device comprises a water carrying chamber, in which one or more porous filter membranes are arranged. One or more flow restrictors corresponding to each membrane are set on the wall of the water carrying chamber. The total permeation capacity of the flow restrictors is less than that of said filter membranes. The present invention can avoid the blockage of the device effectively.

Abstract: A water-drip hose comprises: the first fusion splicing units formed to have an upper fusion splicing line parallel to an end portion of the outer film, a lower fusion splicing line shorter than the upper fusion splicing line, and side fusion splicing lines of a smooth curved shape for connecting the upper fusion splicing line with the lower fusion splicing line; two second fusion splicing units respectively formed at a lower position between the first fusion splicing unit and a neighboring first fusion splicing unit in parallel to the lower fusion splicing line of the first fusion splicing unit at regular intervals, which forms three lower openings; and a third fusion splicing unit formed at an upper position between the first fusion splicing unit and the neighboring first fusion splicing unit in parallel to the upper fusion splicing line of the first fusion splicing unit, which forms two upper openings.

Abstract: An irrigation drip emitter, and methods relating to same, are provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. The emitter having at least one movable member for compensating for fluctuations in supply line fluid pressure. In one form the movable member includes a tapered baffle section movable between a first position wherein fluid is allowed to flow over the tapered baffle section and a second position wherein fluid is prevented from flowing over at least a portion of the tapered baffle section and the tapered baffle section effectively lengthening the extent of a pressure reduction passage. In another form, first and second movable members are provided for compensating for such pressure fluctuations. In another form, a plurality of inputs are provided which are movable between first and second positions to compensate for such pressure fluctuations.

Abstract: An irrigation drip emitter, and methods relating to same, are provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. The emitter having at least one moveable member for compensating for fluctuations in supply line fluid pressure. In one form the emitter further includes a root growth inhibiting member for hindering roots from obstructing fluid flow through the emitter. In another form, the emitter includes an inlet protrusion so that fluid entering the emitter comes from a position closer to the central or center portion of the conduit in order to avoid larger obstructions that may be located near the periphery of the conduit. In another form, the emitter includes a carrier for assisting in mounting the emitter into conduit. In another form, more than one of the above features are present.

Abstract: A plant watering device is disclosed. The device has a preferentially water permeable membrane arranged to separate a supply of water from a root system of a plant. The membrane is arranged to allow water to permeate to water the roots.

Abstract: A drip irrigation emitter may be provided with a coupler for bonding to an inner surface of a conduit. The emitter may include for example a button flow restrictor. The coupler may optionally provide an outlet zone on the conduit surface that is large enough for automated perforation. Bonding the emitter to the surface of the conduit may have a minimal effect on the dimensions and/or properties of the conduit. A button drip irrigation emitter may optionally include a two part labyrinth. The labyrinth may for example be confined between a cylindrical surface and a cover and/or wind between intermeshing baffles on the cover and/or the surface.

Abstract: A flow-regulating drip emitter, comprising a base that includes an inlet connector configured for connection to an upstream line with a water source; and a cover attached to the base, the cover including an outlet connector configured for connection to a downstream line. At least one of the cover or the base defines at least a first labyrinth passageway having a first resistance to water flow and a second labyrinth passageway having a second resistance to water flow different from the first resistance to water flow; and further wherein the base and the cover are structured so that movement of the cover in relation to the base connects the inlet connector to the outlet connector via only the first labyrinth passageway, and wherein further movement of the cover in relation to the base connects the inlet connector to the outlet connector via only the second labyrinth passageway.

Abstract: The instant invention relates to methods for increasing or promoting microbial activity in soil selected for treatment.

Abstract: A drip irrigation pipe includes a drip emitter and a flap that is formed in the pipe wall by first and second grooves. The first groove is longer than the second groove and the flap remains connected to the pipe wall at two bridges. A pivot region of the flap extends between the two bridges and the flap is adapted to twist about the pivot region as liquid exits the pipe at the flap.

Abstract: Drip irrigation apparatus including a main water flow channel having associated therewith along a length thereof a plurality of pressure-controlled drip irrigation emitter units and at least one secondary water flow channel extending generally parallel to the main water flow channel and receiving water from at least one of the plurality of pressure-controlled drip irrigation emitter units, the at least one secondary water flow channel having water outlets disposed along the length of the main water flow channel, intermediate the plurality of pressure-controlled drip irrigation emitter units.

Abstract: A flat type pressure regulated drip emitter with a non-drain valve capabilities that is installable inside a water supply conduit during the conduit manufacturing process and characterized by that the emitter's non-drain valve function is executed independently and separately from its pressure regulation function, through a portion of the emitter's elastomer component that is strained and biased against the emitter's water inlet opening and is moveable towards and away from an additional opening (additional to the emitter's water outlet opening), exposed to the pressure prevailing in the emitter's water exit pool and therefore, at any given time, this portion of the elastomer component is exposed to the maximum differential pressure that prevails in the system—on its one side to the water pressure prevailing in the water supply conduit and on its other (second) side—to the approximate atmospheric pressure.

Abstract: A drip emitter is described herein that is advantageously configured to allow large grit to pass through the drip emitter when in use. The drip emitter includes a housing containing a flow path extending between a water inlet and a water outlet, a pressure-reducing segment, such as a torturous path, of the flow path downstream of the inlet and upstream of the outlet, and a dynamic pressure regulator downstream of the water inlet and upstream of the pressure-reducing segment of the flow path. The dynamic pressure regulator is configured such that a decrease in pressure in the pressure-reducing segment of the flow path causes the dynamic pressure regulator to adjust to maintain a generally constant rate of flow through the water inlet as compared to the rate of flow when there is no decrease in pressure in the pressure-reducing segment of the flow path.

Abstract: An irrigation system including a diverter line is provided. The system includes drip irrigation lines, T-junctions interleaved between adjacent drip irrigation lines, each T-junction including a three-way line coupled to the diverter line, a check valve operably disposable between the three-way line and a downstream end of an upstream one of the drip irrigation lines to permit fluid flow in only a forward direction and a controllable valve operably disposable between the three-way line and an upstream end of a downstream one of the drip irrigation lines. The controllable valve is operable to permit fluid flow in only the forward direction and to prevent the fluid flow.

Abstract: A controllable emitter of an irrigation apparatus including a drip line and a control station configured to control a pressure of pressurized fluid in the drip line is provided. The controllable emitter is disposable along the drip line and includes a container coupled to the drip line, the container being formed to define an interior and including an inlet through which the pressurized fluid is receivable in the interior from the drip line and an outlet through which the pressurized fluid is exhaustible from the interior, a piston, including a magnetic element, disposed at least partially in the container to occupy a position in accordance with the pressure of the pressurized fluid and a sensor configured to sense a position of the magnetic element and to communicate a sensed position to the control station.

Abstract: An irrigation system is provided and includes a main irrigation line, one or more lateral driplines, each lateral dripline being divided into zones and including a plurality of emitters at each zone and a plurality of controllable valves disposed along each of the one or more lateral driplines at zone borders. Each one of the plurality of controllable valves is actuatable to activate corresponding emitters in the associated zone in a zone by zone cycle and each one of the plurality of emitters is replaceable to vary an amount of deliverable fluid by the zone by zone cycle.

Abstract: A discrete flat dripper of the non-pressure regulated type of drippers or of the pressure compensated—flow rate regulated type of drippers, suited for being integrally installed within a hose, that comprises a body component whose configuration is essentially rectangular, 5 wherein on its one side that is suited to being affixed to an internal wall of the hose, formed with an exit pool that it is elongated in its dimensions and substantially extends along the entire length of the body component, and with a flow passage circumferentially surrounding a substantial part of the elongated exit pool, and an integral dripper line wherein there are integrated at least one of such discrete flat dripper, and optionally and as enabled by the 10 elongated exit pool, the water outlet opening that is formed at the hose wall opposite the elongated exit pool and within its boundaries, is in a configuration of a thin and long slit.

Abstract: Apparatus for operating a group of normally closed, pressure compensated drippers at relatively low liquid flow rates includes a pulsating device having an inlet and an outlet that converts a low continuous liquid flow rate entering its inlet, through a flow control unit, to a high intermittent and pulsating flow rate ejected through its outlet. A manifold has an inlet connected to the outlet of the pulsating device, a group of normally-closed, pressure-compensated drippers being connected to the manifold. The pulsating device converts a low continuous flow rate of liquid entering its inlet, through the flow control unit, to a high intermittent and pulsating flow rate that ejects from its outlet and flows from its outlet through the manifold inlet and through the normally-closed, pressure-compensated group of drippers connected to the manifold, out from the drippers, at a pressure-compensated low flow rate.

Abstract: Described is a non pressure compensated drip emitter with multiflow facility, the drip emitter being placed inside a pipe of a drip irrigation system, the drip emitter comprising: a housing; a filter system being fitted at each inlet to ensure pure supply of water inside the emitter; three pools of water from only one of which water get discharged out of emitter and from emitter to the land to be irrigated, the third pool in the middle; a labyrinth in fluid communication with each pool and the filter system, the labyrinth comprises zigzag water paths; wherein the labyrinth connects middle pool with remaining two pools through the zigzag water path in such a way that even in case of partial clogging of the zigzag water path, the remaining partial zigzag water path remain active and ensure the discharge of water at a selected flow rate from the emitter.

Abstract: An embodiment provides a device for assisting fluid distribution that includes a ring having an inner surface disposed over an emitter tube and an engagement portion to secure the ring to the emitter tube. Another embodiment provides a flow-control system that includes an emitter tube having spaced orifices therein, emitters positioned within the emitter tube adjacent the spaced orifices, and spaced clips positioned on the emitter tube, the clips having an inner surface disposed over the emitter tube and an engagement portion to secure the ring to the emitter tube. Another embodiment provides a method for assisting fluid distribution that includes the following steps: selecting an emitter tube; installing emitters within the emitter tube; and mounting, to the emitter tube, rings, each having an inner surface disposed over the emitter tube and an engagement portion to secure each ring to the emitter tube.

Abstract: A delayed degradability drip irrigation pipe including a water conduit at a water conduit pressure and a plurality of drip irrigation outlets, each communicating with the water conduit and providing a water output at a pressure below the water conduit pressure, at least the water conduit being formed at least partially of a degradable material and also including a degradability delayer which provides a desired delay prior to failure of the water conduit but permits eventual degradation of the degradable material under predetermined conditions.

Abstract: A drip emitter is provided for delivering irrigation water from a supply tube to an emitter outlet at a reduced and relatively constant flow rate. Water enters the emitter through a first inlet and proceeds into a first chamber. When the water pressure is above a predetermined level, a one-directional valve opens to allow fluid flow past the first chamber, through a tortuous path flow channel, and through an emitter outlet. A second inlet is used to compensate for water pressure fluctuations in the supply tube to maintain output flow at a relatively constant rate. Water enters the second inlet and presses a flexible diaphragm toward a water metering surface to provide pressure-dependent control of the output flow. A copper member is mounted to the emitter over the emitter outlet to prevent plant root intrusion into the emitter outlet.

Abstract: An irrigation pipe with holes is provided. The pipe is, at least in the area of each hole, multilayered. At least top and bottom layers of the pipe are made of a water-repellant material, and an inner layer of the pipe is made of a porous material. The hole is defined by a cut surface of the pipe wall. The cut surface comprises a seal, which covers at least the inner layer. Each layer may be bonded to adjacent layers.

Abstract: A system including: (a) a pipe having an aperture providing fluid communication between inner and outer pipe surfaces; (b) a cylindrical drip emitter disposed within the pipe, including: an emitter body having an outer facing having a generally convex contour adapted in generally complementary fashion to a concave contour of the inner pipe surface, the outer facing secured to the inner surface; a liquid inlet section adapted to receive a liquid from within the pipe, and to deliver the liquid, via the aperture, to the outer facing; a pressure-reducing section disposed in fluid communication with the liquid inlet section; functionally active sections including the pressure-reducing section, the liquid inlet section, the functionally active sections disposed within, and longitudinally defining, a position of a longitudinal segment of the body; and at least one functionally passive section, disposed on the outer facing, within the longitudinal segment; and (c) a liquid flow path fluidly connecting between the liq