Apparatus for delivering fluid to a utilization device and a closed loop system for cleaning said apparatus and said utilization device
US3977797A · kind A · utility
Inventor
Key dates
| Filing date | May 6, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | May 6, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44D3/006
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a motor driven, helical screw conveyor having an impeller wheel at one end thereof. The screw conveyor is immersed in the liquid to be transferred and lifts the liquid so that the impeller may drive it through a first conduit and a first valve into a utilization device. The valve has three separate positions, the first of which permits delivery of a major portion of the fluid to the utilization device with a minor portion of the fluid being returned to the container via a second conduit. A second position of the first valve provides for flow of fluid from the container, through the first conduit, through the first valve and then directly back to the container via the second conduit. A third position of the valve is utilized with a flexible apron that encloses the utilization device so that when it is desired to clean the apparatus, a cleaning fluid is delivered through the first conduit to the utilization device and outwardly therefrom into the enclosing apron and then through the valve for return to the container via the second conduit. In conjunction with the closed loop cleaning system there is provided a filter that surrounds the helical screw con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.