Progressing cavity pump
US4029443A · kind A · utility
10Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1974 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Nov 27, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/1073
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved progressing cavity pump of the Moineau type having a helically externally threaded rotor coacting with an internally helically threaded stator. In a Moineau pump where the pump casing is a singular tubular unit, the stator is bonded to the casing with an adhesive. When the pumps are used with a corrosive fluid, such as caustic soda, the adhesive is attacked and the stator becomes free to rotate. To prevent the stator from rotating, a rib is attached along a portion of the casing. The rib restrains the stator and prevents its rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.