A Liebherr HS 895 HD duty-cycle crawler crane fitted with clamshell bucket is carrying out excavation for largest public works contract ever let by the City of Portland. Nov 9, 2009.

The crane had only 600 parts, with a mere 15 recommended for replacement due to wear. It had no cab, and could be equipped with a hydraulic clamshell bucket with 10 tons of digging pressure or a ...

A cableway and self-loading skips that resembled dragline buckets followed; then, under the trade name Brownhoist, he developed the first clamshell type unloader, with a 1 1/2-ton bucket suspended ...

A clamshell dredge bucket system involves a single bucket, the crane, and the cables used to operate the clamshell. The dredge operates by lifting the bucket, ...

Demolishing a building with a clamshell bucket (to a large extent, the clam bucket has been replaced by the excavator and grapple attachment); and Lifting down sections of structures and equipment.

The barge unloading system, equipped with a 24 cubic foot clamshell bucket, can reach out 86 feet horizontally. It is also able to continue unloading barges even when the river rises or falls 25 feet.

Intended to be used for canal maintenance, including debris removal, such as trees and other floating (or not floating) debris, some dredging with a clamshell bucket, and servicing of lock ...

However, the largest excavation digger available and a conventional crane with a clamshell bucket only had a capacity to unload 2 million tons a year, not enough for the project.