Patent ID: 6260629
Filing Date: 2001-07-17
Classification: A01B

Abstract:
An agricultural implement having a working travel direction and a transport travel direction transverse to the working travel direction, said implement comprising:a frame including a leading side and a trailing side each extending laterally between respective ends of the frame in the working travel direction, the frame including a laterally extending beam mounted on the trailing side of the frame;first and second laterally spaced apart ground wheels, each mounted on the beam at the trailing side of the frame for rotation about a respective upright axis between a working position oriented in the working direction of travel and a transport position oriented in the transport travel direction;first and second steering arms, each mounted on a respective one of the first and second ground wheels and arranged to be rotated with the ground wheel about the respective upright axis between the working and transport positions;a hitch pole mounted on the frame for pivotal movement between a laterally extending transport position and a working position transverse to the transport position;a steering linkage comprising first and second drag links, each pivotally coupled at a first end to the hitch pole and pivotally mounted at a second end on a respective one of the first and second steering arms in both the working and transport positions for connecting the hitch pole to the ground wheels for moving the ground wheels between their transport and working positions together with movement of the hitch pole between the transport and working positions respectively;a latching mechanism arranged to secure the hitch pole in fixed relation to the frame in both the transport and working positions of the hitch pole, the hitch pole being pivotal between the transport and working positions when the latching mechanism is released;a third wheel mounted on the leading side of the frame and being movable between a transport position substantially parallel to the first and second ground wheels in their transport positions and a working position spaced above the transport position; anda third wheel lifting device arranged to lift the third wheel from the transport position to the working position.