Vapor reduction in filling fuel storage tanks
US6062274A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1999 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Mar 15, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/365
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A fuel storage tank with reduced vapor generation capability having a drop tube with a pressure activated valve in the wall of the drop tube to permit communication between the inside upper region of the tank and the inside of the drop tube. The valve is normally closed to prevent vapors in the tank from being sucked into and entering the drop tube. A buildup of vapor pressure in the upper drop tube region causes the valve to open and the air/vapor to flow from the upper drop tube region into the upper storage tank region. No special pipes, lines, floats or other apparatus are needed for this vapor reduction arrangement and method and any air or vapor originally entering the riser or initially in the drop tube that flows into the tank upper region is handled in the conventional manner as all other vapor originally in that region, i.e. it is recycled and recovered in the top of the tanker delivery truck.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.