Balance structure for rotating member
US6715566B2 · kind B2 · utility
1Cited by
16References
15Claims
0Family size
Inventor
Key dates
| Filing date | Apr 29, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jul 1, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A balancing structure to reduce vibration created in a rotating body by imbalance comprises an annular groove formed in the body, the groove partially filled with a quantity of solid balls. The solid balls, by only partially filling the groove, provide a stabilizing force that tends to compensate for the imbalance caused by different amounts of solids adhering to one side or the other of the body, such as for example a drilling assembly. The groove is preferably wider in a region further from the axis of rotation from the rotating body for more efficient balancing effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.