Self-perforating drip irrigation device
Patent 4392616 Issued on July 12, 1983. Estimated Expiration Date: 
April 6, 2001. 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.
April 6, 2001. 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 3885743 Flow restrictor and trickle emitter Flow reducing devices particularly useful as drip emitters for drip irrigation Drip or trickle emitter Patent #: 4281798 InventorApplicationNo. 06/251157 filed on 04/06/1981US Classes:239/271, WITH NOZZLE OR FLOW LINE ATTACHED PENETRATING MEANS239/542CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATORExaminersPrimary: Love, John J.Assistant: Sobel, Paul A. Attorney, Agent or FirmInternational ClassA01G 25/02 (20060101)AbstractA drip irrigation emitter having a body with internal structure for reducing fluid pressure to provide a low pressure trickle output and an inlet member providing a passage for water to the internal structure and adapted to connect the emitter to a supply hose. The inlet member has a frusto-conical barb portion integral with a neck portion that extends between the large end of the barb portion and the emitter body. A cylindrical portion extending from the small end of the barb portion, which has at least one inlet opening, is usable as a mechanical punch to enable the emitter to be attached with one simple operation to a plastic irrigation hose or lateral without prepunching holes therein. | |
