Water conducting and emitting device
Patent 4053109 Issued on October 11, 1977. Estimated Expiration Date: 
October 11, 1994. 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.
October 11, 1994. 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 3080124 3662955 3870236 3874598 3887138 InventorApplicationNo. 655487 filed on 02/05/1976US Classes:239/542, CONDUIT OR NOZZLE ATTACHED IRRIGATION-TYPE DECELERATOR138/42, Tortuous path138/103COMBINEDExaminersPrimary: Blunk, Evon C.Assistant: Mar, Michael Attorney, Agent or FirmInternational ClassB05B 015/00Foreign Application Priority Data1975-02-25 ILAbstractThe present invention relates to an improvement of the irrigation device described in my earlier U.S. Pat. No. 3,887,138.There I have described an elongated continuous hollow hose for conveying fluid through the interior thereof and formed with a helical fluid flow passage of predetermined pitch between the inner and outer surfaces thereof, the helical passage having an axis substantially coaxial with the longitudinal axis of said hose.According to the present improvement the grooving need not be helical, it may be a continuous groove of regular or irregular convolutions, meandering along the extension of the respective hose. | |
