System for detecting overflow of a tank
US6505470B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a system for detecting overflow of a liquid cryogen storage tank, a differential pressure gauge measures the pressure of the tank at the top and bottom of the tank while liquid cryogen is introduced into the tank. Once the measurement reaches a predetermined amount, the operator terminates the fill. Alternatively, the differential pressure gauge sends a signal to the controller and the controller shuts the valves off. The tank includes an outlet pipe connected to either an audible device or avisual device and a vent stack. The excess cryogen, liquid or vapor, flows out of the tank through the outlet pipe. The audible device whistles when vapor passes through but is silent when the liquid passes through the audible device. This audible device provides a back-up warning which signifies when liquid cryogen is flowing out of the tank so that the operator may shut off the valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.