Method and device for determining the amount of a liquid existing in a container
US6474156B1 · kind B1 · utility
20Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | May 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a device for determining the amount of ink or similar liquid existing in a container are disclosed. A resonance circuit is arranged on the container storing the liquid. A voltage having a preselected frequency is applied to a drive coil located outside of the container to thereby induce a voltage having a preselected frequency in the resonance circuit. The voltage induced in the resonance circuit, in turn, induces a voltage having a preselected frequency in a sense coil also located outside of the container. The amount of liquid in the container is determined in terms of the voltage induced in the sense coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.