Conical boring tool
US4000783A · kind A · utility
6Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Oct 20, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A self-advancing conical boring tool with frusto-conical roller cutters rotatably mounted to a tapered frame by means of self-aligning spherical roller bearings. Each roller cutter is constrained within a pair of spherical roller bearings for free rotation about an axis that is both oblique and skewed relative to a longitudinal axis of the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.