Device for establishing and/or monitoring a predetermined filling level in a container
US5815079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2967
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A description is given of a sturdy device for establishing and/or monitoring a predetermined filling level in a container, which device exhibits a housing (1), two oscillating rods (3, 4) projecting into the container, a first diaphragm (2) which is fixedly clamped, at its border, into the housing (1), a second diaphragm (6, 6') which is arranged parallel to said first diaphragm in the interior of the housing (1), a piezoelectric element (7, 7') which is arranged on the second diaphragm (6, 6') and is intended for receiving and converting oscillations into an electric output signal and for inducing bending oscillations in the second diaphragm (6, 6'), and in the case of which device the mode of oscillation produced by the piezoelectric element (7, 7') corresponds to the mode of oscillation utilized for inducing oscillation in the oscillating rods (3, 4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.