One-piece in-line pressure compensating drip irrigation emitter
Patent 4824025 Issued on April 25, 1989. Estimated Expiration Date: 
May 26, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 26, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3856333 Irrigation pipes with dripper units and method of its manufacture Irrigation tubing Drip level irrigation Pressure compensator/emitter Drip irrigation apparatus Patent #: 4687143 InventorApplicationNo. 07/054468 filed on 05/26/1987US Classes:239/542, CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATOR138/43, Variable restriction239/533.1, FLUID PRESSURE RESPONSIVE DISCHARGE MODIFIER* OR FLOW REGULATOR*239/547, DISTRIBUTOR OR NOZZLE IN CIRCUMFERENTIAL WALL OF FLEXIBLE SUPPLY LINE239/570Line fluid operatedExaminersPrimary: Kashnikow, AndresAssistant: Trainor, Christopher G. Attorney, Agent or FirmInternational ClassesG05D 7/00 (20060101)G05D 7/01 (20060101) A01G 25/02 (20060101) A01G 25/00 (20060101) AbstractA one-piece inline pressure compensating drip irrigation emitter unit comprising a regulator cylinder having an internal transversal channel member and one or more narrow trickle channels therein, the unit being disposed within a tubular fluid carrying conduit line or constituent parts thereof, provided with at least two orifices through which the line or constituent part communicates with the outside. The emitter unit provides for fluid output flow at a controlled, constant rate regardless of wide variations in the pressure of the fluid delivered to the emitter. | |
