Patent ID: 6152248
Filing Date: 2000-11-28
Classification: B62D,Y10T

Abstract:
A mobile agricultural machine, comprising:an engine;pair of right and left traction members;a transmission;a main speed change device operable to transmit, at any speed ratio, a driving force from said engine through said transmission to said traction members so that said traction members are driven at any traveling speed;a speed change mechanical linkage for moving said speed change device and thereby controlling the speed of said traction members;a steerage means comprising a steerage drive pump and a steerage drive motor driven by said steerage drive pump;a manual steering member; anda steering means including a steering mechanical linkage for operatively coupling said manual steering member to said steerage means and thereby cause said steerage means to differentiate the traveling speeds of said traction members and reduce said traveling speeds in response to the magnitude of movement to which said manual steering member is operated when said agricultural machine is running substantially straightly and is commanded to make a spinning turn.