Patent ID: 6945476
Filing Date: 2005-09-20
Classification: A01G,Y02A

Abstract:
1. A self-compensating drip irrigation emitter, which comprises a body to be fastened to a pipe, which body has a flat inner surface at the bottom of a cavity, a flexible flat membrane flexibly hung along its perimeter on an annular shoulder above said cavity, the top surface of the membrane being compressed by the fluid flowing in the pipe, and which has an internal central orifice formed inside said flat surface and perpendicular thereto, which orifice communicates with the exterior of the pipe, and which further includes at least one groove, formed in said flat surface, which extends radially outwards from said central orifice to the peripheral edge of said flat surface so that when pressurized fluid is introduced from said pipe inside said emitter, the membrane is resiliently deformed toward the interior of said cavity and against said flat surface, whereas the groove and the internal central orifice operate to limit the flow of the emitter to a substantially constant value, within a range of very low to very high pressures of the fluid flowing in the pipe, wherein the groove, in the end section opening into the internal central orifice, branches into at least two separate end grooves, both opening outwards at the edge of said orifice, a wall member being interposed between the two branch grooves.