Life indicator and cartridge for indicating total water flow
US5458766A · kind A · utility
19Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Sep 8, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2209/445
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A life indicator is so designed that an electric current flows to a light emitting diode utilizing a battery as a power source when two electrodes are electrically connected. The two electrodes are so installed as to be electrically connected by passing water through a water passage communicating with an objective equipment, and the discharge life of the battery is set equal to the service life of the equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.