Float activated gauge
US5224379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1992 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Oct 14, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gauge for indicating whether the level of a liquid, such as fuel or oil, in a tank has reached one or more preselected levels. A magnet is mounted in a stem attached atop a float which moves up and down with the rising and falling of the liquid level. When the magnet is adjacent an electrical switch housed in a sealed cover, the switch closes and connects an external power supply to a warning light. The float moves within a cylinder which has a small drain hole at the bottom and a vent near the top. Liquid moves into and out of the guide through the drain hole at a relatively slow rate and thereby eliminates intermittent closing and opening of the switch which would otherwise occur due to the sloshing of the liquid when the tank is in motion, such as when mounted in a vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.