NASA NTRS · 19660000520
Self-actuating grapple automatically engages and releases loads from overhead cranes
Abstract
Two-piece grapple mechanism consisting of a lift knob secured to the load and a grapple member connected to the crane or lift automatically disengages the load from the overhead lifting device when the load contacts the ground. The key feature is the sliding collar under the lift knob which enables the grapple latch to be stripped off over the lift knob.
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Froehlich, J. A., Karastas, G. A.. 1966-11-01. Self-actuating grapple automatically engages and releases loads from overhead cranes. https://ntrs.nasa.gov/citations/19660000520
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