| 摘要 |
A concrete saw includes a track for mounting on the side of a wall or slab which is to be cut, a carriage which, when placed on the track, may be slid along the track, a frame mounted on and projecting outwardly from the carriage, a hydraulic motor mounted on the frame to be selectively moved toward or away from the carriage, and a manually operable mechanism coupled to the motor to cause it to be moved either toward or away from the carriage. The hydraulic motor includes a drive shaft which projects upwardly from the motor and frame. A drive wheel is mounted on the drive shaft of the motor to be rotated when the motor is operated. An elongate cutting cable whose free ends may be joined and unjoined is provided for looping about the wheel and through two spaced-apart openings in a wall to be cut. When the cable is positioned for cutting, the motor is operated to rotate the drive wheel and thus move the cable to cut concrete about which the cable is looped. As cutting takes place, the motor and drive wheel are moved slowly away from the carriage to continue to maintain the cable in a taut condition to facilitate continued cutting of the concrete.
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