US 11,498,814 B1 · Claw device

Abstract

The present invention relates generally to a claw device for installing, removing, and repairing a manhole assembly. Claw device may include a base assembly and two or more arm assemblies. The arm assemblies may be configured to pivot in response to movement of a slide along an axis of a shaft extending upwardly from base assembly. In particular, when a lifting force is applied to the slide, one or more grip pads of arm assemblies may be configured to move inwardly toward the shaft and frictionally grip a surface of the manhole assembly. In one aspect, at least one arm assembly includes an extending member having a plurality of positions for adjusting the length of at least one arm assembly. Advantageously, claw device may be adjusted to accommodate for manhole assemblies of different diameters or other objects having various shapes and sizes.

Claims18

Dependent claims

A claw device for use in lifting a manhole assembly, comprising:

a base assembly;
a shaft extending upwardly from said base assembly;
a slide movable along the shaft, said slide including an upper section and a lower section;
a clamp configured to releasably secure said slide to said base assembly;
two or more arm assemblies, each arm assembly comprising:
a linking arm pivotally coupled to said slide;
and
an engaging arm pivotally coupled to said linking arm and said base assembly, wherein said engagement arm is configured to pivot relative to said shaft in response to movement of said slide along said shaft.

5 more elements

Dependencies are inferred from the claim text.

Claw device

Life of this patent

Claw device

Life of this patent

Abstract

Claims18