E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/02 (2006.01) E02F 5/20 (2006.01) E21C 11/02 (1990.01)
Patent
CA 2080989
ABSTRACT OF THE DISCLOSURE A hole digger assembly which includes a truck, a turntable on the truck, a boom mounted to the truck via links, cylinders between the links and the turntable and between the boom and the turntable for moving the boom, a drill mechanism which is mounted to the boom, and a cylinder for moving the drill mechanism between an operative position and a storage position at which the drill mechanism is parallel to the boom and partly located between two opposed side walls of the boom.
Bereskin & Parr
Briggs Roger Robarts
LandOfFree
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