Capacitative weight sensor
US4984128A · kind A · utility
16Cited by
5References
20Claims
0Family size
Inventors
Key dates
| Filing date | Mar 30, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Mar 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G7/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A load sensor which has an elongate hollow body 11, preferably formed as a metal extrusion, and which forms a first capacitative plate 21. A second parallel capacitative plate 15 is formed on an insulating body which is held in place relative to the extrusion by a resilient support 16. Application of a load to the extrusion causes variation in the gap between the plates of the capacitor, thus affecting the capacitance in a manner which is measured and processed to provide an output signal which is directly proportional to the applied load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.