Apparatus for holding a cutting bit
US5725283A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/188
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for supporting a mining bit in a bit holder which attaches to the rotatable drum of a mining machine. The apparatus comprises a sleeve that is adapted to be received in aperture in the bit holder. The sleeve has an aperture therethrough for rotatably receiving a cutting bit. The sleeve has a body portion and a collar which serves to prevent axial movement of the sleeve relative to the bit holder. An under cut area is provided in the body portion and/or the collar to reduce the peak amount of stress that develops between the body portion and collar. The bit holder and sleeve are constructed such that the position of the sleeve may be fixed axially with respect to the body portion by an interference fit in such a manner that it may be easily removed from the body portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.