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:
Feb. 04, 1986
Filed:
Aug. 16, 1983
Applicant:
Inventor:
Stephen L Bellio, Lynnfield, MA (US);
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66C / ; B66C / ;
U.S. Cl.
CPC ...
212196 ; 212182 ; 212197 ; 212231 ; 212227 ;
Abstract
A pivoted arm counterbalance system for a self balancing crane provides a counterbalancing moment exactly equal to the overturning moment of the crane by the utilization of a dynamic balancing system in which a drive cable having a tension related to the tension of the support cable runs over and is secured to a constant radius sector secured to the counterbalance arm. The pivot point of the sector corresponds to the pivot point of the counterbalancing arm such that the constant radius sector provides a constant lever arm regardless of the counterbalance arm angle.