Barrier lifter
US5000648A · kind A · utility
Inventor
Key dates
| Filing date | May 21, 1990 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | May 21, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C1/442
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for mounting onto a lifting machine for gripping and lifting a highway barrier and the like, said apparatus comprising a body adapted to be mounted on to the lifting machine. A pair of clamping arms is pivotally and slidingly engaging the body and having mechanical advantage means pivotally engaging and extending between the body and clamping arms for releasably applying a gripping force to the barrier and to lift same. Locking means engaging the clamping arms is provided for successively locking the clamping arms in an open position to receive the barrier, unlocking the clamping arms in an operative position to apply the gripping force and thereafter locking the clamping arms in the open position for reuse upon release of the barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.