Flush control
US6560790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | May 1, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2562
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A high flow valve assembly and a low flow valve assembly are in parallel flow relation between an inlet and an outlet of a flush controller. The valve assemblies are opened by solenoid operated pilot valves under the control of a microprocessor based flush control system. A turbine directly measures flow through the low flow valve assembly by providing pulses to the microprocessor, and the control system counts pulses and computes flow through the high flow valve assembly to perform a flushing operation including an initial siphon trap flushing high flow portion and a subsequent trap reseal low flow portion. Corrections are made to the pulse count to correct for partial valve open conditions and other variables. An override switch provides a signal to the control system for a flush operation A user detection system includes a pair of emitters and a pair of detectors defining an array of intersecting detection points in a skewed plane in which the control system can locate the position of a user. The controller can be configured for supplying flush water for either a toilet or a urinal, and for either right or left side water supply entry and the control system detects the unique co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.