Elastomeric stator with modified fiber orientation
US11806902B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2020 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Jul 8, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2253/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A stator for use in a positive displacement motor or a progressing cavity pump. The stator comprises an elastomer mix preferably including rubber and a fiber reinforcement. The fiber reinforcement includes a plurality of fibers. The elastomer mix is formed into a stator via an injection molding process. The injection molding process includes a shear flow step in which shear flow is induced in the elastomer mix while the elastomer mix is in an uncured state. The shear flow modifies the orientation of the fibers into an advantageous modified fiber orientation. Shear flow is induced preferably via differential rotation of injection mold assembly elements during the injection molding process. Methods of manufacturing the stator are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.