| 摘要 |
<p>An attachment for a hydraulic excavator (11) including a pair of jaws (22, 23) mounted on a frame (18) and having offset points (65, 66, 53) or projections (51, 75, 76) on the jaws to apply localized pressure onto a rock or coral piece for breaking the workpiece. Both jaws are movable and operable by individual hydraulic cylinders (25, 26). The direction of the thrust against the jaws being tangential to the arc of movement of the pins for connecting the cylinders to the jaws at a location approximately midway of the operational arc of the jaws.</p> |
