Device and method for preventing wear on road milling and trenching equipment
US5931542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Mar 18, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/197
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wear prevention device for use with roadmilling or trenching machine blocks which hold rotatable cutting bits. The wear prevention device includes a substantially cylindrical retainer sleeve with a longitudinally directed slot running the length of the sleeve. The wear prevention device also includes a substantially circular wear washer with a radially inwardly directed key which is adapted to fit within the sleeve slot, thereby interlocking the sleeve and the wear washer. The retainer sleeve is adapted to receive a shank of a cutting bit and is placed within a bore in a machine block. The machine block bore may further include a keyway, or the machine block may include a boss surrounding the machine block bore with the keyway The retainer sleeve may further include a radially outwardly directed key adapted to fit within the machine block bore keyway, thereby further interlocking the retainer sleeve with the machine block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.