Remote controlled self-powered excavator apparatus
US4526413A · kind A · utility
16Cited by
4References
1Claims
0Family size
Inventor
Key dates
| Filing date | Apr 9, 1984 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Apr 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S294/905
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A self-contained system eliminates need for hydraulic or other lines from a crane to a grapple or clamshell bucket on the end of the crane hoist line. A wireless (radio or sonic) portable remote-control unit sends signals to a hydraulic power system carried above the grapple or clamshell bucket, either as an integral part of the bucket or spaced a distance up the line from the bucket suitable for avoiding damage when the grapple or clamshell bucket is used in dredging or is otherwise submerged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.