Multiple chamber drip irrigation hose made from a single strip
Patent 5252162 Issued on October 12, 1993. Estimated Expiration Date: 
January 27, 2012. 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.
January 27, 2012. 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 2798768 3008862 3467142 3774850 3779468 3870236 3873030 3896999 3903929 Irrigation means for the uniform distribution of liquid InventorAssigneeApplicationNo. 826462 filed on 01/27/1992US Classes:156/203, And edge-joining of one piece blank to form tube156/204, Folding156/218, Hollow cylinder article156/227, By folding156/268Partial cutting bonded sandwich (e.g., grooving or incising)ExaminersPrimary: Ball, Michael W.Assistant: Crispino, Richard Attorney, Agent or FirmInternational ClassB29C 053/08AbstractA multiple chamber hose for drip irrigation and the like, with a primary chamber for fluid flow therethrough and a multiple layer section having a primary layer, a mid layer and a secondary layer, and with a secondary chamber in said mid layer for fluid flow therethrough. The primary layer is positioned between the primary chamber and the mid layer, and the secondary layer is positioned between the mid layer and the exterior. The hose includes an inlet opening for fluid flow from the primary chamber to the secondary chamber and an outlet opening for fluid flow from the secondary chamber to the exterior. The invention also includes methods of making such a hose. | |
