System for detecting liquid fuel blockages in the vapor return line of a fuel dispenser
US6948536B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Dec 26, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/0496
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vapor collection testing device is held in one hand and a fuel dispensing nozzle for a fuel dispensing system to be tested is held in the other hand of an operator. The device is slipped over the spout of the nozzle and pushed against the boot of the nozzle (if so equipped), or otherwise pushed sufficiently over the holes on a bootless nozzle so that the nozzle's flow interlock device is opened. Opening the interlock activates the nozzle's lever, to permit fuel dispensing. Without turning the gasoline dispenser on, the nozzle lever is depressed to open the integral vapor valve. At this point, no gasoline is dispensed, but air is ingested by the nozzle and sent into the gasoline storage tank. The air ingestion can be observed by the device's flow meter, in order to determine if there is a liquid flow blockage in the vapor recovery line of the fuel dispensing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.