Interlock and latching systems for a dispensing nozzle
US4033389A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D2007/545
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An interlock system for use on a conventional gasoline dispensing nozzle with an automatic shut-off system is disclosed. The interlock system includes a valve mounted in the discharge spout and connected to the vent tube so that when the valve is in its open position, the vent tube is open to the inside of the discharge spout. The valve actuation system is designed so that when the nozzle is not properly inserted into the vehicle fillpipe, the valve obtains an open position so that in the event dispensing of gasoline is attempted, the vacuum created in the vent tube by the venturi in the automatic shut-off system causes gasoline which flows down the discharge spout to be drawn into the vent tube, thereby causing the automatic shut-off system to disable the nozzle. The valve actuation system is also designed to act in response to the weight of the nozzle resting on the fillpipe and to provide the latching capability for the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.