Excavator-hoist
US6443687B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/024
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An excavator-hoist including a chassis for supporting an operator's cab, a drive assembly, and a boom with a working tool supported at the free end of the boom, two pairs of projecting pivotable arms connected to opposite end sides of the chassis, respectively, for supporting at their free ends two pairs of wheels, with the arms, which support the front wheels having free end portions offset relative to respective remaining portions of the front wheel supporting arms in a vertical plane, with the front wheels being carried by the offset portions of the arms, and with respective piston-cylinder units, which are provided for pivoting the front wheel supporting arms in respective vertical planes, having one of their respective ends attached to the respective arms above pivot axes of the respective arms, and having another of their respective ends attached in respective regions of bottoms of the respective arms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.