Stator element of a progressive cavity pump and progressive cavity pump
US11326594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2019 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | May 16, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/802
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A stator element of a progressive cavity pump having a reinforcement tube having a longitudinal axis, an inner face (22), and an outer face, and an elastomer liner fixed to the inner face of the reinforcement tube, wherein a portion of the reinforcement tube has a substantially constant thickness (e) and in that said portion of the reinforcement tube is deformed such that it comprises at least a first relief pattern and a second relief pattern, the first relief pattern having the shape of a helical strip that is right-handed relative to the longitudinal axis, the second relief pattern having the shape of a helical strip that is left-handed relative to the longitudinal axis, the first and second relief patterns meeting in at least one section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.