Mud motor rotor with core and shell
US11795946B2 · kind B2 · utility
1Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2021 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | May 19, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49242
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotor for a mud motor includes a core having a first outer shape, and a shell positioned around the core, the shell having a second outer shape that is different from the first outer shape, the second outer shape defining one or more lobes and one or more cavities that are configured to engage a bore of a stator during rotation of the rotor relative to the stator. A thickness of the shell varies as proceeding around the core, from a non-zero minimum thickness to a maximum thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.