Heavy breaking giant excavating equipment

Abstract From the Canadian patent

A strip mining shovel for strip mining of structurally relatively weak materials which are difficult to mine such, as, rock beds or alternate layers of coal and rock or shale. The shovel has a small dipper arrangement connected to a dipper stick arrangement which dipper stick is connected to the end of a heavy main swivelable boom. The dipper stick assembly with the dipper preferably has a hydraulically actuated arrangement for movement thereof which movement is limited in range. Therefore, small limited movements of the dipper arrangement and dipper stick assembly excavate limited loads from the area being stripped and deposited them into a hopper which then speeds the strip material onto …