US 11,981,541 B2 · Lifting device

Abstract

An under the hook lifting device configured to lift an object is provided. The lifting device includes a boom having a first end and a second end, and a strap having a length extending downwardly from the first end of the boom, where the strap is configured to be secured to an object. A winch is positioned on the boom, where the winch is configured to adjust the length of the strap extending downwardly from the first end of the boom. The lifting device also includes a counterweight extending downwardly from the second end of the boom, and a trolley positioned at the second end of the boom, where the trolley is slidable along the boom. The counterweight is supported by and movable with the trolley, where the position of the trolley along the boom is movable to maintain a substantially horizontal position of the boom. Methods of lifting an object with a lifting device are also provided.

Claims19

Dependent claims

An under the hook lifting device configured to lift an object, the lifting device comprising:

a boom having a first end and a second end;
a strap having a length extending downwardly from the first end of the boom, wherein the strap is configured to be secured to an object to be lifted by the lifting device;
a winch positioned on the boom, wherein the winch is configured to adjust the length of the strap extending downwardly from the first end of the boom;
a counterweight extending downwardly from the second end of the boom;
and
a trolley positioned at the second end of the boom, the trolley slidable along the boom, wherein the counterweight is supported by and movable with the trolley, wherein the position of the trolley along the boom is movable to maintain a substantially horizontal position of the boom.

3 more elements

Dependencies are inferred from the claim text.

Lifting device

Life of this patent

Lifting device

Life of this patent

Abstract

Claims19