Pressure compensated discharge emitter
US6513734B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Jan 8, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A a drip irrigation system comprises a hose with a flexible wall circumscribing and bounding a main flow-path for carrying irrigation fluid, and pressure-compensated emitters spaced along the length of the hose and providing a communicating channel between the main flow-path and a region at lower pressure outside the main flow-path, such as the region outside the hose, the pressure-compensating function of the emitters producing a flow-rate through the emitters that is weakly dependent on the pressure differential across the emitters. The pressure compensated emitters comprise one slit extending through the flexible wall, the slit interrupting the circumferential stresses in the flexible wall when the flow-path is pressurized, the stress interruption simultaneously causing a dilatation of the slit and an outwardly radial displacement in the single wall material adjacent to, and around the slit, and protrusions connected to the flexible wall and extending from the perimeter of the slit towards the main flow-path to form an outwardly diverging discharge channel with an inlet facing the inward fluid region, the outwardly diverging discharge channel connecting the inward fluid region t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.