A lifting apparatus for lifting a manhole cover includes a first frame section with a first end assembly that supports a hook to engage a lifting block on a manhole cover, and a second frame section with a second end assembly that supports a hook to engage a lifting block on the manhole cover. At least one of the first and second end assemblies is movable, via an actuator, with respect to the other to change a distance between hooks. The hooks are movable in a way that the hooks engage with the lifting blocks on an adjacent manhole cover. The first frame section is coupled to the second frame section during a lifting operation, and the first and second frame sections are selectively detachable from one another when not in use.
Hydraulic lifting apparatus
2017-08-08
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
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