Pressure relief system
US3996975A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Oct 16, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/3227
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for automatically releasing the pressure built up inside a tank when the liquid level falls below a predetermined level. This system is particularly applicable for use on a hydrocarbon tank truck which receives the vapors from the underground tank being filled, so that the pressure built up during filling can be released into the atmosphere through a filter in order to minimize the hydrocarbons released into the atmosphere when the connections to the underground tank are uncoupled. The system includes a pressure relief line connected to a float valve located inside a tank compartment on one end and to a filter on the other end. The filter can be made out of an adsorbant material which permits it to be cleaned and used over again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.