Counter-balanced, multiple cable construction crane

Author:: Yang, Li-Farn
Published:: Oct 19, 1993.
Physical Description:: 1 electronic document
Additional Creators:: Mikulas, Martin M., Jr.

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Summary:

The invention is a counter-balanced, multiple cable construction crane. The apparatus for hoisting payloads comprises a crane having a lifting means, the lifting means comprising an end effector means and three suspension means or cables. One end of each cable attaches to a different winding means located on the lifting means, and the other end of each cable attaches to a different point on the end effector, such that the three cables have a theoretical point of convergence with this point corresponding to the center of mass of the payload. Three controls command rotation of the winding means to a predetermined position. Accordingly, the crane provides precise and autonomous positioning of the payload without human guidance. The crane further comprises a counter-balancing means. Two controls position the counter-balancing means to offset the overturning moment which arises during the lifting of heavy payloads.

Other Subject(s):

MECHANICAL ENGINEERING

Collection:

NASA Technical Reports Server (NTRS) Collection.

Note:

Document ID: 19940015896.
Accession ID: 94N20369.

Terms of Use and Reproduction:

No Copyright.

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