Moineau pump with rotating closed end outer member and nonrotating hollow inner member
US4923376A · kind A · utility
Inventor
Key dates
| Filing date | Mar 24, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Mar 24, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/1073
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An arrangement for an improved Moineau pump, i.e., a progressing cavity pump with a helical gear pair, wherein the closed end outer gear rotates and orbits relative to a nonrotating hollow inner gear. A hollow inner gear comprising an internal chamber extending axially allows the flow of pumpable material from progressing cavities to the closed end and through the hollow inner gear. The integral and smooth construction of the outer gear and the closed end eliminate contamination sites and further eliminate the need for seals or flexing components which contact the pumpable material. The hollow inner gear can be manufactured to integrally connect to a discharge conduit. The improved pump presented herein can be used within a material containment vessel, and the invention can be positioned to avoid contact of the pumpable material with any rotating couplings. An alternative embodiment presents a closed end outer gear with an internal chamber for use of a pressurized fluid distinct from the pumpable material. Means for connecting the improved Moineau pump to pump body is further provided. An orbital assembly allowing for orbit of the closed end outer gear about the hollow inner gear, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.