Abstract: An irrigation device including an inlet receiving water under pressure, a water collection and releasing mechanism coupled to the inlet for collecting a quantity of water and subsequently releasing at least part of the quantity of water to the atmosphere, said water collection and releasing mechanism comprising a compressible diaphragm, and flow control apparatus governing the supply of water from said inlet to said water collection and releasing mechanism.

Abstract: A sprinkler including a liquid inlet, a liquid outlet rotatable with respect to the liquid inlet and apparatus, driven by a pressurized flow of liquid entering the liquid inlet, for rotating the liquid outlet, the apparatus including magnetic coupling apparatus for transmitting motion.

Abstract: Drip irrigation apparatus including a housing including a water inlet, a water outlet and a water flow path extending therebetween and a pressure responsive membrane disposed within the housing and arranged to govern the flow of water, and wherein the orientation of the pressure responsive membrane is responsive to the pressure of the water impinging on the membrane at a plurality of different locations on the same side of the membrane which are separated from each other.

Abstract: An irrigation device including a first interior water path defining member and a second exterior water path defining member, cooperating with the first water path defining member to define a circuitous water path including sequential water path components extending generally in three mutually perpendicular directions.

Abstract: A technique for manufacturing extruded drip irrigation lines including drip irrigation elements having a non-circular cross section including the steps of:extruding a drip irrigation conduit; andheat welding discrete drip irrigation elements having a non-circular cross section to a portion of the interior surface of the drip irrigation conduit extending over less than the entire circumference thereof, the step of heat welding including the following steps:sequentially feeding discrete drip irrigation elements through the interior of the drip irrigation conduit;causing individual drip irrigation elements to establish initial contact with the extruded conduit as the extruded conduit is being stretched to its final cross sectional dimensions; andcompleting heat welding of the elements to the conduit when the conduit has substantially reached its final cross sectional dimensions.

Abstract: An impact drive sprinkler including a body defining a nozzle arranged to provide a stream of pressurized liquid; spring loaded stream deflector and hammer apparatus for intermittently engaging the stream and providing in response to the engagement a force causing intermittent rotation of the body about a rotation axis; and apparatus for selectably limiting the amplitude of motion of the deflector and hammer apparatus and thus determining the direction of rotation of the body and the overall range of the resulting spray. The selectably limiting apparatus has first and second orientations corresponding to rotation of the sprinkler in respective forward and return directions and comprises a first hammer engagement surface that is engaged when the sprinkler is rotating in the forward direction. The first hammer engagement surface is arranged such that hammer engagement therewith retains the apparatus for selectably limiting in the first orientation.