NASA NTRS · 19690000493
Automatic leveling and equalizing hoist device
Abstract
Hoist uses six equally spaced support points with the load equalized between pairs to prevent over-stressing of any one point of support. The pickup point is automatically shifted through a motor driven feedback system to level the load throughout the lifting period.
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Brower, J. R., Holcomb, D. F.. 1969-10-01. Automatic leveling and equalizing hoist device. https://ntrs.nasa.gov/citations/19690000493
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