Negative pressure detector
US3931739A · kind A · utility
0Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Aug 13, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a negative pressure or depression detector characterized in that it includes a floating element which forms at once a detecting element and the movable disc or plate of an air capacitor. The floating element is placed inside a chamber having its lower end vented and its upper end communicating with the depression source, the fixed plate of the capacitor being located at the lower end of the chamber without interfering with the venting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.