DROPPER Russian patent published in 2006 - IPC A01G25/02 

FIELD: agricultural amelioration, in particular, equipment for drop irrigation of vegetable, fruit and berry crops, grape and sown grasses on beds.

SUBSTANCE: dropper has casing, threaded cover, membrane, filter and float. Inlet and outlet openings are provided in casing and threaded cover. In case pressure is created, membrane comes into engagement with casing surface. Casing is closed from the bottom with threaded cover. Helical groove is provided within casing cavity on its inner cylindrical surface. In casing cavity there are successively arranged filter, membrane and float. Filter is made in the form of hollow cylinder manufactured from resilient gas-expanded plastic. Membrane is made in the form of sleeve and is manufactured from elastic water-tight material. Resilient disk is reinforced in bottom part of membrane by means of initial basic mold. Flexible ring embraces narrowed portion of outer surface of sleeve. Float is made in the form of hollow ball. Radial grooves provided on end surface of threaded cover are adapted for dosed feeding of water into outlet opening.

EFFECT: increased efficiency in continuous and uniform dispensing of irrigation water.

5 cl, 1 dwg