Boom assembly for a trencher machine
US5228221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | May 27, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/146
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A boom assembly including a boom with laterally spaced side walls and adapted to have a digging chain and tooth assembly rotatable thereabout. A boom end idler assembly is arranged between the side walls at the free end of the boom for rotatably supporting the digging chain and tooth assembly. The boom end idler assembly includes a boom end idler rotationally supported by an anti-friction bearing. Axially aligned members pass through aligned apertures in the side walls of the boom and at least partially within the inner race of the bearing for defining the rotational axis of the boom end idler and for clamping the side walls of the boom to each other to minimize clearances between the boom and the boom end idler. Seals are provided to close the clearances proximate the bearing and inhibit foreign debris from contaminating the anti-friction bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.