Method and device for dismounting or mounting jib sections on a tower crane
US4064615A · kind A · utility
7Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Oct 28, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49831
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of dismounting or mounting jib sections on a tower crane, at which a carrying cradle with counterweight and having the form of a three-armed lever is used for lowering or hoisting jib sections to be dismounted and mounted, respectively, and the cradle is so designed as to during the lowering and hoisting operations, respectively, to assume suitable balanced positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.