We only ever made one of these fitted to the first long reach caterpillar excavator in the uk and the first job it went on was in Liverpool.
It was not a complete success as the ram that was outsourced destroyed itself the blame got passed around but was never resolved.
Instead of a powered rotator the unit could be tapped against the building and had full 360 degree rotation and saved a lot of money on control circuits and motors etc a hydraulic oil rotation joint was fitted in the middle of the "head" part. We also missed the fact the some already in production had a simple gear system in side this meant the jaws moved in unison but was not a major issue.
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