Deere & Company

Donald I Malm

Douglas Rene Johnson

Craig Alan Puetz

Reno Antonio Rodeghiero

A sixteen forward speed, four reverse speed transmission is provided having a very high efficiency and excellent shift quality. The gear ratios are selected so that a relatively large ratio spacing is provided between each gear step in the low-speed PTO usage range and in the high-speed transport usage range, while a much smaller gear ratio spacing is provided in the intermediate tillage or field usage range. The gear ratios are selected to minimize the number of clutches being changed to shift from one gear to the next, with minimal speed and momentum differences required inside the transmission during each shift. Just two shifts have a large ratio change, and they are positioned in locations having minimal usage, thereby minimizing operator awareness of these gear ratio spacings. The total number of meshes through the transmission is minimized to provide maximum efficiency.

Growing community of inventors

Cedar Falls, IA, United States of America

Donald I Malm