Valve cartridge having pressure sensor for agriculture and weed control
US6062496A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An agricultural spray implement includes a plurality of removable valve/filter/nozzle cartridges. Each removable cartridge has a housing that retains a high speed solenoid valve and a spray nozzle. When the solenoid valve is open, an agricultural liquid (for example, herbicide) flows through the solenoid valve, through a chamber in the housing, and through the nozzle. To monitor cartridge operation and/or to detect cartridge failures (for example, a solenoid valve that is stuck open or closed or a nozzle that is clogged), a pressure sensor is provided that detects a pressure in the chamber. A chamber pressure that does not change when the solenoid valve is controlled to open and/or close is indicative of cartridge failure. Operation of each of the many spray cartridges of the agricultural spray implement is monitored from a single display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.