Spindle cap bearing for rotary cone rock bits
US5148879A · kind A · utility
4Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1992 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jun 17, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2352/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention consists of a floating spindle cap disposed between a spindle pilot bearing extending from a main journal bearing and a cone bore formed by a rotary rock bit cone secured to the journal bearing. The floating spindle cap is formed from a softer material than both the spindle bearing and the cone to accommodate for slight misalignments and edge loading between the journal bearings and the cone while working in a borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.