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Guidance system for towed vehicles

  • US 4,180,133 A
  • Filed: 01/12/1978
  • Issued: 12/25/1979
  • Est. Priority Date: 01/12/1978
  • Status: Expired due to Term
First Claim
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1. In combination, a towed farm implement having first and second opposite sides with a tool bar extending therebetween and a tongue structure extending forwardly from said tool bar, anda guidance system for said implement comprising,a compensating hitch means pivotally secured at its rearward end to the forward end of said tongue structure and adapted to be connected at its forward end to the lower links of a three-point hitch of a prime mover,control means for selectively adjusting the position of said hitch means with respect to the lower links of a three-point hitch of a prime mover to which it is attached,means for marking a furrow in the ground as said implement is towed, said marking means extending from said sides of said implement,a follower extending from said implement to be operationally engaged by said furrow so that said implement is a predetermined distance from said furrow,detecting means operatively connecting to said follower for electrically detecting the deviation of said implement from said predetermined distance from said furrow, andan electronic circuit means electrically connecting said control means to said detecting means so that a predetermined deviation of said implement from said predetermined distance from said furrow activates said control means to adjust the position of said hitch means to align said implement at said predetermined distance from said furrow.

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