Boom mechanism
US6488161B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | May 2, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F11/046
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A boom mechanism that is cooperable with a lift vehicle or base structure includes a tower boom and an upper boom liftable in a dependent relationship by a single lifting mechanism. The tower boom and the upper boom are respectively pivotally secured to an upright having a fixed orientation by a tower link or the like. A timing link is secured between the tower boom and the upper boom, and a lifting mechanism is secured between the upright and the upper boom. As the upper boom is driven by the lifting mechanism, the timing link secured to the tower boom causes the tower boom to pivot about a tower boom nose pivot, thereby raising both the upper boom and the tower boom in a dependent relationship. The construction helps to minimize the need for tail and frame counterweight by controlling a position of the platform in configurations of both forward and rearward instability. As a consequence, the gross vehicle weight can be considerably reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.