Deere & Company

David Alan Larson

Gregory E Sparks

Vijay Manilal Dharia

James Edward Sabelka

Charles William Formwalt, Jr

Charles William Formwalt

An electronic controller unit is formed of first and second base plates parallel to one another and spaced apart having a flexible substrate circuit board thereon with an intermediate portion of the circuit board extending between the two base plates. A connector is joined to the intermediate portion of the circuit board between the two base plates and is sealed to an edge of each base plate to form one side of the unit housing. A three-sided frame is joined to the other three sides of the two base plates to completely enclose the circuit board. The two major sides of the unit are formed by separate base plate pieces that are severed from an integral frame after the flexible circuit is bonded thereto. This allows the unit to be manufactured without bending of a rigid plate having the flexible circuit mounted thereto.

Electronic controller unit and method of manufacturing same

A differential lock control system includes a solenoid valve which operates hydraulic differential lock mechanisms in response to the operation of a control circuit. The control circuit includes normally closed, steering-responsive switches which open to unlock the differential when steering effort exceeds a certain level. The steering-responsive switches are operated by pins which are exposed to pilot pressures on either end of a valve spool of a conventional pilot-operated steering valve.

Growing community of inventors

Cedar Falls, IA, United States of America

David Alan Larson