Deere + Company

Alvin Lewis Menzel

Andrew Paul Redman

Lynn E Kurt

Victor C Pierrot

David Emmert Stover

Eugene S Zirker

A tree shear head includes a shear, a grapple tong and an accumulator tong which are positioned by respective double-acting hydraulic actuators controlled by selectively actuatable solenoid-operated valves such as to place the shear head either in a non-accumulate mode wherein both tongs operate concurrently to grasp and release trees one-by-one or an accumulate mode wherein the tongs are individually operated in a sequence resulting in the accumulation of a plurality of cut trees.

Tree shear head and controls therefor

A tree harvesting machine has delimbing knives which are fixed to arms having hubs fixed, by means of a shear pin assembly, to a rock shaft. The shear pin assembly includes a pair of headed pins which are inserted into opposite ends of first and second axially aligned bores respectively extending diametrically through the hub and shaft. A pair of retaining clips are secured to the hub by and are respectively urged against the pin heads by a pair of cap screws. The pins are dimensioned such that their respective inner ends are spaced from each other when the pins are installed.

Growing community of inventors

Dubuque, IA, United States of America

Alvin Lewis Menzel