Low flow emitter with exit port closure mechanism for subsurface irrigation

摘要

A drip emitter for subsurface irrigation includes a valve chamber defining a hollow interior, an entry port and at least one exit port. A flexible diaphragm is mounted in the hollow interior of the valve chamber for movement in response to pressurized water being supplied to the hollow interior through the entry port. The drip emitter further includes a tortuous path water flow channel that limits the flow of water from the hollow interior of the valve chamber to the at least one exit port. A closure member is moved by the flexible diaphragm to open the at least one exit port when pressurized water enters the hollow interior to allow water to be discharged through the at least one exit port. A spring moves the closure member to close the at least one exit port when the supply of pressurized water is shut OFF.

主权项

1. A drip emitter for landscape irrigation, comprising:
a valve chamber defining a hollow interior, an entry port, at least one exit port, and a tortuous path water flow channel that limits the flow of water from the entry port to the at least one exit port; a flexible diaphragm mounted in the hollow interior of the valve chamber for movement in response to pressurized water being supplied to the hollow interior through the entry port; a closure member positioned between the tortuous path water flow channel and the at least one exit port, the closure member moved by the flexible diaphragm to open the at least one exit port when pressurized water enters the hollow interior to allow water to be discharged through the at least one exit port; and a spring that moves the closure member to close the at least one exit port when the supply of pressurized water is shut OFF; wherein the at least one exit port defines an interface between the hollow interior of the valve chamber and an environment surrounding the drip emitter.