Rotational grapple

Details Rotational grapple Rotational grapple

B - Operations, Transporting

66

C

294/19

B66C 3/16 (2006.01) B66C 3/00 (2006.01) E02F 3/36 (2006.01)

Patent

CA 1070357

ROTATIONAL GRAPPLE ABSTRACT A rotational grapple adapted for attachment to the boom of a construction machine possesses both lifting and downward pressure capabilities through a unique thrust bearing arrangement. A rotational sleeve component capable of carrying grapple jaws or a lifting magnet is swiveled to a relatively stationary shaft structure which is suspended from a crane boom or the like through a universal pivot. In one form a drive flange on the rotational sleeve component is engaged frictionally by a hydraulically powered motor wheel which is suspended floatingly on the non- rotatable shaft structure and urged into engagement with said drive flange by adjustable tension spring means. Grapple jaw operating cylinders on the rotational component are included in hydraulic circuits and in one form the circuit is through the sleeve component and within said relatively stationary shaft structure.

265634

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