Irrigation signaling device
US5825295A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/189
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A device for signaling a predetermined soil moisture condition includes a switching tensiometer that closes a switch when the root water tension reaches a predetermined level; a power source connected to the switching tensiometer; and a signal connected to the switching tensiometer so that when the switching tensiometer closes the switch, power source is connected to the signal operate the signal to indicate that the predetermined soil moisture condition has been reached. The signal preferably includes a spring-loaded flag that operates between a retracted position and an extended signal position; a latch for releasably securing the flag in its retracted position, and an electrically operated release that releases the latch to allow the flag to operate to its extended signal position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.