Signal sensor insensitive to static pressure variations
US4996675A · kind A · utility
18Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Dec 22, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0685
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A signal sensor automatically compensates for the variations of the static pressure of the medium in which it is placed. The signal sensor comprises one or two assemblies each formed of a piezoelectric sensitive element applied against one face of a flexible plate. The other face of the plate is shielded from the variations of the dynamic pressure to be measured by a material absorbing the vibrations but fairly flexible so as to transmit any variation of the ambient static pressure. This material which may be a porous foam or a fibrous substance impregnated with liquid, fills a tubular apertured sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.