| 摘要 |
<p>A regulated flow restrictor device particularly useful as a drip irrigation emitter includes a housing (20) having an inlet opening (23), an outlet opening (24) and a flow-restrictor passageway including baffles (28,29) defining clearances with the passageway walls, which clearances, by the displacement of a displaceable wall in the form of an eastomeric membrane (31), vary the resistance of the flow of a fluid through the passageway in response to variations in the pressure of the pressurized fluid. The clearances are of increasing height in the direction from one of the openings (23,24) towards the other of the openings (23,24) such that the clearances are sequentially closed with increasing pressure in the pressurized fluid to maintain a substantially uniform flow to and through the housing outlet opening (24) despite variations in the pressure of the pressurized fluid. <IMAGE></p> |
