DROPPER Russian patent published in 2004 - IPC

FIELD: agronomic amelioration, in particular, drop irrigation of vegetable, fruit and berry crops. SUBSTANCE: dropper has detachable case with union arranged in case upper part and injector arranged in lower part and provided with rigidity ribs converging to form pointed rod. Membrane is positioned in case detachment plane between case supporting members. Membrane and supporting members define inside case cavity above membrane, cavity below membrane and annular cavity, said cavities being arranged concentrically to membrane. Cavity arranged below membrane is connected with accumulating vessel of injector via gauged opening. Membrane is made multilayer, with upper and lower layers being made in the form of flat rings of different size. Porous water- permeable layer is positioned between rings. Gauged opening is formed as diffuser widening toward lower flat ring of membrane. Edge of case supporting part is positioned higher than diffuser upper edge. Detachable parts of case are equipped with stepped retainers made in the form of annular combs, which may be joined to one another. Case supporting parts, between which membrane rings are arranged, are connected via channels. EFFECT: wider operational capabilities and enhanced reliability in operation. 1 dwg