Rotational grapple

Details Rotational grapple Rotational grapple

1975-11-17

1977-02-01

Cherry, Johnny D.

Handling: hand and hoist-line implements

Magnet

214147G, 294106, 37183R, 294 88, B66C 316, E02F 344, B66C 104

Patent

active

040058956

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. 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 through the sleeve component and within said relatively stationary shaft structure.

REFERENCES:
patent: 2802585 (1957-08-01), Morin
patent: 3330056 (1967-07-01), Woodside et al.
patent: 3413029 (1968-11-01), Donovan
patent: 3527495 (1970-09-01), Maradyn
patent: 3881263 (1975-05-01), Coeurderoy

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