CLOSED-TYPE CYLINDRICAL DRIPPER INCORPORATED TO DRIP IRRAGATION TUBES

摘要

Novelty: an integral closed-type cylindrical dripper practicable for drip irrigations is disclosed. Constitution: two distinctive parts (the main part k and the jacket J) mutually tightened and so sealed either by pressure and temperature of the jacket around the main part (fig.2) or by rotation of one part around another by means of threads (fig.5,6,9B) or via protuberances and channels (fig.8,9D) or by snap-action fastening via protuberances and holes (fig.3,4 and 9A) or channels (fig.7 and 9C). Advantages: water path and water pressure drop take place inside the dripper due to labyrinths G created between the main part K and the jacket J. The adherence of the outer surface of the dripper to the inner wall of the tube has no effect on the water flow since the inner surface of the tube does not contact the water paths inside the dripper.