Bit holder for miner
US4828327A · kind A · utility
26Cited by
0References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 29, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Feb 29, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/191
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pick holder for a miner comprising a mounting base and a bit holder detachably mounted to the mounting base by way of a substantially vertical join face. The join face incorporates a pair of mating faces on each of the mounting base and bit holder inclined relative to the longitudinal plane of the pick holder and forming an arrowhead formation with a pair of shoulders parallel to the longitudinal plane. The bit holder is secured to the mounting base by a longitudinal bolt a significant length allowing a desired degree of strain to be induced in the bolt during attachment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.