Detachable rotatable grapple

Details Detachable rotatable grapple Detachable rotatable grapple

B - Operations, Transporting

66

C

B66C 1/58 (2006.01) B66C 3/16 (2006.01)

Patent

CA 2357249

A grapple for releasable attachment to a manipulator arm of a vehicle. The grapple unit comprises a central framework to which are pivotally mounted a pair of spaced, opposed gripping fingers to define a grasping region between the fingers. The fingers are movable to open and close the grasping region in order to grasp an object within the region. There is a joint assembly adapted to rotatably mount the central framework to the manipulator arm that includes a first planar bearing surface releasably connectable to the manipulator arm and a second planar bearing surface formed on the central framework and extending parallel to the first planar bearing surface. A sheet of low friction material is inserted between the parallel bearing surfaces to engage both surfaces. A shaft intersects the bearing surfaces to define an axis for rotation of the central framework with respect to the first planar bearing surface. A drive system is provided for controlling rotation of the central framework with respect to the first planar bearing surface. The grapple is simply and inexpensively constructed, and permits reliable grasping, lifting and rotation of objects.

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