Automatic shut-off dispensing nozzle responsive to liquid in a tank reaching a predetermined level and to a supply pressure
US4453578A · kind A · utility
54Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1983 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jan 12, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/48
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An automatic shut-off nozzle has a first diaphragm responsive to the liquid in the tank being filled reaching a predetermined level to automatically stop flow through the nozzle. Flow also is automatically stopped when a second diaphragm responds to inactivation of a pump supplying the liquid to the nozzle. When a venturi poppet valve is located downstream from a main poppet valve in the nozzle, the venturi poppet valve has a bleed passage extending therethrough to enable the pressure upstream thereof and acting on the second diaphragm to be reduced to zero the pump is inactivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.