Farm implement row guidance device

Apparatus for adjusting the position of a field implement assembly including a ground-working implement operably coupled to laterally spaced apart swayable hitch arms, the ends of said arms remote from said implement being swayably connected to a tractor for pulling the assembly along generally parallel field rows, said tractor including a draw bar separate from and between said arms, said apparatus comprising:

• means for sensing the position of said ground-working implement relative to said rows as said assembly is pulled therealong;
• means for operably coupling said sensing means to said ground-working implement;
• and
• adjusting structure operatively connected with said sensing means and responsive to said sensing means for adjusting the position of said field implement assembly,
• said adjusting structure comprising a selectively actuatable piston and cylinder assembly including a cylinder and a shiftable piston rod extending from one end of said cylinder, bracket means operably coupled to said draw bar and including an upright segment extending above the draw bar, first ball joint means supported on said upright segment and located above said draw bar for coupling one of said cylinder and piston rod to said upright segment between said swayable arms, and second ball joint means mounting the other of said cylinder and piston rod to said field implement assembly, said piston and cylinder assembly being operable upon actuation thereof in response to said sensing means for lateral movement of said field implement assembly to effect adjustment of said ground-working implement,