Control system for filling tanks with liquids
US5349994A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1993 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7287
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for controlling the loading of fuel into a multi-compartmented transport tank interrupts loading of fuel when the level of fuel in any compartment is above a given upper level and prevents loading when the level of fuel is above a given lower level. Fail safe operation is provided by top and bottom liquid level sensors which generate a "dry" signal to indicate that the liquid level is below the upper and lower levels in each compartment. A "dry" signal from the bottom sensor is required to initiate loading of a compartment. Once initiated, a substitute signal permits continued loading of the compartment. The "dry" signal is a pulsing electrical signal which cooperates with a multivibrator to generate a signal for each compartment indicating that loading of fuel is appropriate. Indicia lights are provided for each compartment to indicate the level of fuel in each compartment. Diagnostic means enable these lights to identify the failure of a sensor or a faulty electrical connection therewith. A dummy, "dry" signal generator permits the use of the control system circuitry with tanks having a different number of compartments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.