Solids pumping apparatus
US4391561A · kind A · utility
48Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Apr 13, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/48
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A pump for feeding granular material into a pressurized zone having a feed screw (14) located within a cylinder (12). The cylinder is tapered (34) at its discharge end, and the outside diameter of the flights (32) is also tapered (43). The clearance (38) of the tapered flights is significantly greater than the clearance (40) of the non-tapered flights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.