| 摘要 |
A circular saw (22) of 10-foot diameter or greater stems from a shovel stick (56) of a hydraulic shovel. The saw operates with hydraulics and linkages to adapt to all planes and positions, including taking any angular positions from 0 to 135 degrees. A control valve (61) determines the positioning of the saw thereby allowing the carving of a half-sphere in a stone wall, in concrete or in ice. The saw can be locked in the desired angle to realize a secure job. The saw is mounted on a lower rotation base (38) of 360 degrees and possesses a support device (23) mounted to the base (38) about a rotation pivot (30). Angular displacement due to the upper stationary plate (42) swivels in accordance with movements of stretching or compressing of hydraulic cylinder (49) of the shovel. The saw is used in every confined space where it is required to bring mobile equipment.
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