1
Dean L Heino: Automatic electronic control for a power shift transmission. Deere & Company, November 15, 1983: US04414863 (84 worldwide citation)

A controller including a microprocessor for automatically shifting a transmission and selectively locking and unlocking a torque converter connecting the engine with the transmission. The controller has both manual and automatic modes of operation. In the automatic mode, one of three different shift ...


2
Dean L Heino, Wayne E Gruben: Automatic electronic control for a power shift transmission. Deere & Company, June 24, 1980: US04208929 (78 worldwide citation)

An electronically controlled transmission system includes an engine driven torque converter driving a planetary gear transmission. The torque converter is lockable by a lockup solenoid valve to provide a direct through drive and the planetary gear transmission is shiftable among a plurality of gear ...