Hydraulic excavator equipment for excavation laterally of the excavator

Abstract

A hydraulic excavator for excavating laterally of the excavator's position on a work plane which includes a two part or compound lever lifting arm wherein the first part or portion of the lifting arm is pivoted at one end to an excavator base by a support pin to permit the lift arm to move vertically in a plane extending normal to the excavator base or work plane. A second part or portion of the lift arm is pivotally connected to the end of the first portion opposite to the excavator base to rotate relative to the first portion in the same vertical plane of movement. A side positioning arm is pivotably connected to the second portion of the lifting arm for movement in a horizontal plane parallel to the work plane or excavator base. A working arm, having an excavating apparatus such as a bucket, is pivotably connected to the free end of the side positioning arm for movement in a vertical plane extending normal to the plane of movement of the side positioning arm. Hydraulic actuators are provided for controlling the rotation of the arms and movement of the excavating apparatus.

Dependencies are inferred from the claim text.