Vacuum assisted loading system
US5291922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Apr 21, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D7/048
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vacuum assisted system for loading a liquid product containing vapor into a tank comprising apparatus for loading the liquid product under pressure into the tank, and a system for disposing of vapor recovered from the tank during loading. The system also includes conduit for interconnecting the tank and the vapor disposal, and a blower in the conduit for applying a predetermined vacuum to the tank. The loading apparatus pressure and the blower vacuum act to move vapor from the tank to the vapor disposal. A by-pass conduit is formed about and between the outlet and the inlet sides of the blower, and a valve is provided in the by-pass conduit which is responsive to the vacuum at the inlet side of the blower for progressively opening to permit by-pass flow of vapor from the outlet side to the inlet side of the blower. The valve provides maximum by-pass when the vacuum approaches a predetermined maximum level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.