Power-saving controller for toilet flushing
US5224685A · kind A · utility
Inventors
Key dates
| Filing date | Oct 27, 1992 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Oct 27, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S4/03
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A power-saving controller for toilet flushing includes a passive pyroelectricity detecting device connected to a microcomputer, which is further connected to an active infrared detecting device, and a switch device such that when a user is nearby the toilet in a relatively long distance, the passive detecting pyroelectricity detecting device will respond to generate a first triggering signal to the microcomputer, which in turn generates a second triggering signal to actuate the active infrared detecting device to detect whether a user is using the toilet, if so, then the active infrared detecting device will respond to generate a third triggering signal to feed back to the microcomputer, which in turn enables a timer to count therein, until the user leaves the toilet position, causing the third triggering signal to terminate, which in turn triggers the microcomputer to programmably generate a fourth triggering signal to turn on the switch device, which in turns activates a pumping motor connected thereto to pump water to flush the toilet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.