Breakable washer earth boring bit
US6892832B2 · kind B2 · utility
1Cited by
14References
39Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Nov 13, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B43/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drill bit is assembled to the makeup end of a drill string by means of a breakable washer comprising a ring-shaped body having an inner diameter and an outer diameter. A radially extending first surface of the ring-shaped body is planar and substantially perpendicular to a centerline axis through the body. A second radially extending surface has an angle with reference to the first surface that results in a radially diverging configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.