| 摘要 |
An attachment for cleaning and refacing concrete joints, being connectable with a tractor, or the like, incorporating a frame that is rigidly mounted to the vehicle chassis, incorporates a rearwardly extending brace, for supporting of a hydraulic or other cylinder. A torsion bar pivotally mounts through the frame, and is connected by a lever arm with the cylinder, so that the torsion bar, when the cylinder is rendered operative, can undertake a slight pivot, in one direction or the other. An arm supporting a cutting blade, through an integrally connected rearwardly disposed mount, pivotally connects with the frame, and a biasing arm coupled with the blade supporting arm, and is secured with the torsion bar, so that a turning of the torsion bar provides for major adjustments in the location of the cutting blade, with respect to the concrete joint to be cleaned, and during functioning of the apparatus, while refacing of a joint, the impacting forces encountered by the blade are absorbed by the torsion bar, in addition to furnishing its mount.
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