Miner cutting bit holding apparatus
US5011229A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Feb 5, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/191
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for supporting a cutting bit having an extended shank on a rotatable cutting drum is provided. The support apparatus includes a bit holder having an upper body portion and a shank portion and a generally rectangular mounting base having rear, side and front members. The upper body of the bit holder includes a bore for receiving the cutting bit shank and upper rear abutment surfaces perpendicular to the bit axis. The shank of the bit holder has a lower rear abutment surface having horizontal and vertical areas and a threaded bore which extends into the shank intermediate the upper and lower abutment surfaces. The rear portion of the mounting base includes upper abutment surfaces perpendicular to the bit axis and a lower abutment surface having horizontal and vertical areas. A draw bolt passes through the rear portion of the mounting base and serves to draw the upper and lower abutment surfaces of the bit holder and mounting base, respectively, into engagement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.