Crane counterweight and handling method
US4363412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1980 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Aug 14, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/74
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An extremely massive mobile crain counterweight requiring demounting from the crane rotary superstructure for separate transport or storage has self-contained raising and lowering mechanism which may be powered from the crane carrier and which forms a part of the counterweight mass. The internal counterweight mechanism is shielded from ballast, such as shot, which fills the interior of the counterweight. A foot plate forming a part of the raising and lowering mechanism of the counterweight is lockable in extended and retracted positions and is constructed for interlocking engagement with a locator structure on the crane carrier. An efficient and simplified sequence of counterweight manipulating steps is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.