Suppression tank scale and level determination
US11668596B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2019 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Oct 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G17/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a system for measuring a fire suppressant or fire suppression propellant quantity, the system comprising: a base (102); a top plate (106) positioned to support a tank (22) of said fire suppressant or fire suppression propellant; a plurality of springs (112) positioned between the top plate and the base to support the top plate atop the base, the plurality of springs positioned to support the top plate along a range of motion between an extended condition and a retracted condition; a first magnetic member (142) mounted to the base; a second magnetic member (140) mounted to the top plate so that a spacing between the first magnetic member and the second magnetic member decreases as the top plate moves from the extended condition to the retracted condition. At least one of the first magnetic member and the second magnetic member is a permanent magnet. A magnetic field sensor (160) is positioned to detect changes in a magnetic field associated with changes in said spacing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.