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:
Dec. 21, 1982
Filed:
Jul. 07, 1980
John F Shumaker, Mt. Pleasant, IA (US);
J. I. Case Company, Racine, WI (US);
Abstract
A linkage system for automatically maintaining the orientation of a bucket of a loader while the lift arms are moved between raised and lowered positions is disclosed. A pair of articulated links are added to the linkage producing the self-leveling function to increase or decrease the amount of tilt applied to the rolled back bucket relative to the tilt applied to the bucket by the cross link alone. The articulated links are also used to maximize the force applied to the bucket to rotate it from the dig position to the rolled back position. The combination of a self-leveling feature together with a loader applying the maximum available force to roll back the bucket results in a loader arrangement which optimizes the efficiency of the loader and the productivity of the operator.