Pressure responsive regulated flow restrictor useful for drip irrigation
US5400973A · kind A · utility
70Cited by
9References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A drip irrigation emitter includes a plurality of baffles defining a labyrinth in which the baffles form clearances of different heights with respect to one of the housing walls, and in which either the housing wall or the baffles are displaced to open or close the clearances sequentially, thereby varying the resistance of the labyrinth to the flow of fluid therethrough in response to variations in the pressure of the fluid at the housing inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.