Working machine and emergency lowering system
US8061764B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | May 21, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/226
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a working machine, in particular a traveling material-handling machine, in particular a hydraulic excavator, comprising a basic machine, a cabin and a cabin arm pivotally mounted on the basic machine, by means of which the position of the cabin with respect to the basic machine can be varied, wherein the cabin arm can be swivelled with respect to the basic machine about a horizontal axis by means of at least one hydraulic actuator, and wherein the cabin is pivotally mounted on the cabin arm via a hydraulic inclination adjustment device. In accordance with the invention, the cabin includes an emergency lowering system, in which an inclination emergency valve is provided for the inclination adjustment device of the cabin, which in a case of emergency lowering provides for alignment of the cabin into a normal position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.