Valve system for a vapor receiving system on a dispensing nozzle
US4049029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Mar 8, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D2007/545
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A valve system for the vapor receiving system of a gasoline dispensing nozzle which acts to prevent the flow of liquid gasoline into the vapor return line in the event that the automatic shut-off system of the nozzle fails to turn the nozzle off. The valve system has a valve seat located at the point where the vapor return line connects to the vapor receiving system and a floating member suspended below the valve seat in such a manner that when the vapor receiving chamber fills with gasoline, the floating member covers the valve seat so that no gasoline flows back through the vapor return line. A shield can also be provided to prevent closure of the floating member by the normal flow of vapors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.