Boom hoist transportation system and crane using same
US8622228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2009 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Aug 28, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/365
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile lift crane includes a boom pivotally mounted on a rotating bed and a boom hoist drum mounted in a frame connected to the rotating bed. A boom hoist line is wound on the boom hoist drum and connected to an upper equalizer and a lower equalizer, with the upper equalizer connected to the top of the boom, such that rotation of the boom hoist drum changes the amount of boom hoist line between the lower equalizer and the upper equalizer, thereby changing the angle between the rotating bed and the boom. The boom hoist drum frame, the lower equalizer and the upper equalizer each include cooperating attachment structures whereby the equalizers can be detachably connected to the frame so that the boom hoist drum, the lower equalizer, the upper equalizer and the boom hoist line can be transported between job sites as a combined assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.