A lifting apparatus for lifting a rectangular manhole cover includes an elongated frame having first and second end assemblies each supporting a hook adapted to engage a corresponding lifting block on a rectangular manhole cover, at least one end assembly being movable with respects to the other end assembly to expand a distance between the hooks. An actuator moves movable end assembly to change the distance between the hooks and force the hooks into engagement with the lifting blocks on an adjacent rectangular manhole cover.
Hydraulic lifting apparatus
2016-03-22
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
European Patent Office | 2023
|European Patent Office | 2022
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