Automated irrigation system
US4033508A · kind A · utility
Inventors
Key dates
| Filing date | May 13, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | May 13, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G25/092
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a center pivot irrigation system, comprising a hollow tube advanced on a wheeled carriage around a pivot and including a plurality of spray heads thereon, the improvement comprising a telescopically received extension deployable from the end of the pivoting tube at the corners of a rectangular plot. A stepping switch, fixed to the pivot, provides the requisite deployment signals at predetermined angular positions, releasing the extension and turning the wheels on a sliding support frame for advancement or retraction. The signals from the stepping switch are furthermore combined with a plurality of status signals to indicate a failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.