Device for grinding side surface of inner wall of rock borehole
US12091940B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2022 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | Jan 5, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for grinding a side surface of an inner wall of a borehole comprises a base on which a direct current motor is installed on the base, one end of the direct current motor is electrically connected to a controller, and the other end of the direct current motor is in drive connection with a second rotating shaft of a right-angle drive steering gear by a universal drive joint. The controller is connected to an air pressure valve by a cable, and the air pressure valve is connected to an air pump through an air pipe. One end, away from the universal drive joint, of the right-angle drive steering gear is provided with a grinding cylinder. Grinding heads are respectively connected to first rotating shafts at both sides of the right-angle drive steering gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.