A backhoe—also called rear actor or back actor—is a type of excavating equipment, or digger, consisting of a digging bucket on the end of a two-part articulated arm. It is typically mounted on the back of a tractor or front loader, the latter forming a "backhoe loader". The section of the arm closest to the vehicle is known as the boom, while the section that carries the bucket is known as the dipper, both terms derived from steam shovels. The boom, which is the long piece of the backhoe arm attached to the tractor through a pivot called the king-post, is located closest to the cab. It allows the arm to pivot left and right, typically through a range of 180 to 200 degrees, and also enables lifting and lowering movements.
A Cat 420F In Arlington Massachusetts USA
Kobelco Excavator in shovel configuration
Wain-Roy Backhoe mounted to a Ford tractor 1948
Excavators are heavy construction equipment primarily consisting of a boom, dipper, bucket and cab on a rotating platform known as the "house" - although the largest form ever, the dragline excavator, eliminated the dipper in favor of a line and winch.
An excavator in Alicante, Spain
House demolition by an excavator in Invermere, British Columbia
A cable-operated excavator under the Northwest (now Terex) name at the Pageant of Steam grounds
Liebherr 314 wheeled excavator