Low flow emitter with exit port closure mechanism for subsurface irrigation
US9253950B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Feb 1, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/088
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drip emitter for subsurface irrigation includes a valve chamber defining a hollow interior, an entry port and at least one exit port. A flexible diaphragm is mounted in the hollow interior of the valve chamber for movement in response to pressurized water being supplied to the hollow interior through the entry port. The drip emitter further includes a tortuous path water flow channel that limits the flow of water from the hollow interior of the valve chamber to the at least one exit port. A closure member is moved by the flexible diaphragm to open the at least one exit port when pressurized water enters the hollow interior to allow water to be discharged through the at least one exit port. A spring moves the closure member to close the at least one exit port when the supply of pressurized water is shut OFF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.