Arrangement for sensing the presence of liquid in a vapor line
US4258760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Jun 4, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D2007/545
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An automatic shut-off nozzle has liquid flow through its vapor return automatically stopped when liquid has filled the vapor line sufficiently in a predetermined period of time to move a float valve to block the vapor return line. This blocking of the vapor return line by the liquid increases the pressure in the tank being filled to cause the automatic shut-off nozzle to stop liquid flow. If the pressure in the tank increases beyond a predetermined pressure when the float valve is in its blocking position, the increased pressure is vented. The automatic shut-off nozzle also stops flow in response to the tank being filled to a predetermined level with liquid or to the pressure in the tank exceeding a predetermined pressure even when there is no blocking of the vapor line by the float valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.