Abstract: An emitter unit to be integrally bonded to an internal surface of a conduit and comprising an elongated housing, a housing inlet adapted to communicate with an interior of said conduit and a housing outlet adapted to communicate with a conduit outlet. An elongated, flow-restricting flowpath is formed in the housing having a flowpath inlet communicating with the housing inlet and a flowpath outlet communicating with the housing outlet. A resiliently flexible membrane is mounted in the housing which is of closed box-like shape and is constituted by an elongated receiving member and a correspondingly elongated cover member. Projections and recesses are formed along the lengths of elongated rim portions of the members and are directed substantially transversely to longitudinal axes of said members such that projections of one member are adapted to form a close pressure fit within corresponding recesses of the other member.

Abstract: An emitter unit to be integrally bonded to an internal surface of a conduit and comprising an elongated housing, a housing inlet adapted to communicate with an interior of said conduit and a housing outlet adapted to communicate with a conduit outlet. An elongated, flow-restricting flowpath is formed in the housing having a flowpath inlet communicating with the housing inlet and a flowpath outlet communicating with the housing outlet. A resiliently flexible membrane is mounted in the housing which is of closed box-like shape and is constituted by an elongated receiving member and a correspondingly elongated cover member. Projection and recess interengaging means are formed along the lengths of elongated rim portions of the members and are directed substantially transversely to longitudinal axes of said members such that projection means of one member are adapted to form a close pressure fit within corresponding recess means of the other member.

Abstract: An irrigation sprinkler having a tubular housing having an inlet and adapted to be coupled to a water supply source and an outlet and in which is located an outlet nozzle including a sprinkler outlet. The housing accommodates flow control means coupled at one end to said inlet end and having an outlet which communicates with and is spaced from the sprinkler outlet by a region defined within the housing and constituting an hydraulic quiet zone for ensuring that water flow arrives at the spray outlet with substantially symmetrical distribution and with minimal turbulence.

Abstract: An installation for the controlled dosing of an irrigation flow with a herbicide particularly for detecting root growth into the outlets of an underground drip irrigation line, includes a sealed container and a slow release herbicide material wherein a portion of the flow is directed through the herbicide impregnated material so that herbicide is controllably released into the diverted flow, and the diverted flow is reintroduced into the irrigation flow.

Abstract: An irrigation emitter unit is provided comprising an outer member of substantially cylindrical shape and having a tapering base portion with fluid flow coupling means; an inwardly directed peripherally flanged edge portion of the outer member; an inner member having a body portion of substantially cylindrical shape substantially sealingly fitted within the outer member and having a cover portion formed integrally therewith; a peripheral edge portion of the cover portion juxtaposed below the flanged edge portion of the outer member; an elongated groove formed in the cylindrical surface of the body portion; a cavity formed in the body portion and communicating at one end thereof with a fluid flow inlet; an inwardly directed flange formed integrally with the walls of the cavity; and a resiliently flexible membrane located within the unit.

Abstract: An installation for the controlled dosing of an irrigation flow with a herbicide particularly for detecting root growth into the outlets of an underground drip irrigation line, includes a sealed container and a slow release herbicide material wherein a portion of the flow is directed through the herbicide impregnated material so that herbicide is controllably released into the diverted flow, and the diverted flow is reintroduced into the irrigation flow.