Telescopic crane for heavy loads
US4660731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1984 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Aug 3, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/42
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A separate boom vehicle is provided for transporting a telescopic boom, which is adapted to be coupled to a revolving superstructure and to be detached from it for transporting. The boom vehicle is provided in its forward portion with a coupling structure for retaining a telescopically extensible part of the telescopic boom, and is provided in its rear portion with a lifting structure for supporting the boom. The lifting structure is so arranged that when it has been longitudinally aligned with the revolving superstructure, a coupling yoke, provided at the lower end of the telescopic boom, is adapted to be displaced by extending and retracting cylinders along tracks provided on the revolving superstructure to a position in which bearing eyes of the telescopic beam register with bearing bores of the revolving superstructure. The revolving superstructure is provided with a pivot pin for coupling the boom to the revolving superstructure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.