Moisture absorptive rain sensor with sealed position sensing element for irrigation watering program interrupt
US6977351B1 · kind B1 · utility
76Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Oct 29, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rain sensor for use with an irrigation control system includes a position sensing element. A moisture absorptive element is supported for receiving rainfall. An actuating element is mechanically connected to the moisture absorptive element for movement adjacent the position sensing element as the moisture absorptive element expands and contracts to thereby induce a change in the position sensing element that can be used to generate an interrupt signal without any mechanical connection between the moisture absorptive element and the position sensing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.