Automatic shutoff device
US4556093A · kind A · utility
Inventor
Key dates
| Filing date | Feb 21, 1984 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Feb 21, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An automatic shutoff device of the type which makes use of a venturi to terminate the flow of a liquid into a container when the liquid in the container reaches the level of the discharge tube. A movable housing is operatively positioned downstream of a constrictive nozzle giving rise to the venturi and a consequent low pressure area; the movable housing substantially encompasses the low pressure area except that the downstream end of the housing is open and may serve as a discharge tube from which liquid flows into the container to be filled, the filling operation continues until such time as the level of the liquid reaches the level of the discharge tube at which time liquid is rapidly drawn into the low pressure area causing the housing to move in the downstream direction thereby overcoming the restoring force of an associated spring biased valve causing the valve to seat to thereby substantially terminate the flow of liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.