Donald E Tullar

US Patent:

40068340, Feb 8, 1977

Filed:

Jan 15, 1976

Appl. No.:

5/649310

Inventors:

Reynold M. Anderson - Morton IL
Donald E. Tullar - Metamora IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

E02F 382

US Classification:

214776

Abstract:

A loader comprises a tractor having a pair of laterally spaced lift arms pivotally mounted thereon and a loader bucket pivotally mounted on forward ends of the lift arms. A cross brace is secured between the lift arms and has at least one bellcrank of a tilt linkage pivotally mounted intermediate its ends on lugs secured rearwardly on the cross-brace. The tilt linkage further comprises a double-acting hydraulic cylinder pivotally interconnected between the tractor and an upper end of the bellcrank and a link pivotally interconnected between a lower end of the bellcrank and the loader bucket. Upon actuation of the cylinder during operation of the loader, compressive stress will be imposed on the lugs and their metal common with the cross-brace and tensile stress will be imposed on the opposite surface of the cross-brace which is free of section changes that are stress concentrators. The absence of stress concentrators in this high tensile stressed surface reduces fatigue failure potential.