Purging system for a liquid dispensing nozzle
US6877532B2 · kind B2 · utility
0Cited by
14References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | May 29, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/54
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A liquid-dispensing nozzle has a system for blowing air for a period of time through the nozzle's spout after the liquid valve closes. The flow of air purges and expels most of the liquid adhering to the interior surface of the spout, preventing this residual liquid from contaminating either the ground on which it may fall when the spout is withdrawn from a filler pipe or the air through evaporation. The invention applies particularly well to dispensing of liquid fuels such as gasoline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.