Device for pumping highly-viscous material, in particular thick oil
US4793767A · kind A · utility
3Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Oct 8, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D3/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for pumping highly-viscous material, particularly thick oil, the device being adapted to immersion in the material and comprising a helical screw (8) and surrounding the screw a shell (9). In order to ensure the feed of the material the screw and the shell are arranged to rotate in opposite directions and to the shell are fixed outwardly-directed feeding vanes (15) and at the root of the feeding vanes on the material collection side are apertures for the delivery of the material to screw (8) rotating within the shell. The speeds of rotation of the screw and the shell can be separately adjustable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.