Automatic shut-off for water treatment system
US6939470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2002 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Jan 2, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water treatment system including an automatic shut-off control valve. The system preferably includes inflow and outflow sensors that monitor flow through the system and a pressure sensor that senses back pressure in a downstream plumbing system. If the sensors sense different flows, a leak in the system is assumed and the control valve is closed. In one embodiment, the flowing back pressure is monitored by the pressure sensor to detect leaks in the plumbing system. In another embodiment, the valve is closed after a specific volume of water flow is sensed and the pressure sensor measures static back pressure in the plumbing system to detect a leak. In yet another embodiment, incremental amounts of water are released by the valve and subsequent back pressures are tested to detect a leak. Optionally, the system includes a control to shut-off a water supply when a water treatment device enclosure is accessed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.