The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1993
Filed:
Nov. 18, 1991
Martin M Mikulas, Jr, Boulder, CO (US);
Li-Farn Yang, Boulder, CO (US);
Abstract
The invention is a counter-balanced, multiple cable construction crane. The apparatus for hoisting payloads comprises a crane having a lifting segment and a counter-balanced segment. The lifting segment comprises an end effector and three cables. One end of each cable attaches to a different winding device located on the lifting segment, 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, this point corresponding with a center of mass of the payload. Three controls command rotation of the winding device to a predetermined position. Accordingly, the crane provides precise and autonomous positioning of the payload without human guidance. Two controls position the counter-balancing segment to offset the overturning moment which arises during the lifting of heavy payloads.