Anti-fraud liquid meters having a drive and driven magnets with double polarity faces
US6098456A · kind A · utility
24Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid meter includes a housing with two compartments with respectively a motor member disposed in the path of movement of a stream of the liquid to be measured and a counter, the transmission of the movement of the motor member to the counter being carried out through the separation wall of the compartments with the aid of a magnetic drive device having a pair of magnets, the first magnet associated with the motor member having a face with double polarity in magnetic equilibrium with a face of double polarity of the magnet associated with the counter, each magnet has at least one double polarity on each of its other faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.