Driving system for core drilling rig
US11905775B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 12, 2018 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Dec 8, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A driving system for a core drilling rig has a driving motor. The driving motor has an outer rotor and an inner stator, and mutually-matched convex ribs are provided on the inner wall of the outer rotor and the outer wall of the inner stator. The outer rotor and the inner stator are in clearance fit. A clearance between the outer rotor and the inner stator is a driving liquid channel. The length of the outer rotor is less than that of the inner stator. The outer rotor is provided between the front and rear ends of the inner stator. The outer rotor is connected to an outer cylinder. The rear end of the inner stator is connected to a coupling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.