Duration-indicating automatic faucet
US5979500A · kind A · utility
113Cited by
4References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 19, 1999 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jan 19, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86397
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In an automatic-faucet system, the control circuit that operates the system's valve (18) causes an indicator lamp (32) to start blinking when it first opens the valve. It keeps the lamp blinking for a predetermined duration to indicate to the user that a time interval prescribed as necessary for effective hand washing has not yet expired. When the interval does expire, the user is thereby assured that he has complied with the relevant duration regulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.