Interlock system for a gasoline dispensing nozzle
US4121635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D2007/545
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A gasoline dispensing nozzle having a system for receiving vapors displaced from a motor vehicle gasoline tank being filled, and an interlock system for both preventing the dispensing of gasoline and closing the vapor receiving system until the discharge spout is properly inserted into the motor vehicle fillpipe. The interlock system includes a first valve mounted in the vapor receiving system outside the discharge spout. This first valve is opened when the nozzle is properly inserted into the fillpipe, and is interconnected with the automatic shut-off system of the nozzle so that dispensing of gasoline is permitted only when the nozzle is properly inserted into the fillpipe. The interlock system also includes a second valve which closes the vapor receiving system, thereby preventing vapors from escaping, until the nozzle is properly inserted in the fillpipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.