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Lock-up mechanism for a planter row unit

  • US 4,425,857 A
  • Filed: 03/15/1982
  • Issued: 01/17/1984
  • Est. Priority Date: 03/15/1982
  • Status: Expired due to Term
First Claim
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1. A planter row unit comprising:

  • a parallel bar linkage, said linkage being adapted for attachment to a planter, said linkage including dual spaced upper and lower bars, said lower bars having curved slotted openings;

    a row unit frame having furrow forming means, furrow closing means, and seed dispensing means, said upper bars being pivotally connected to said frame, pin means mounted on said frame and moveable in said slotted openings in said lower bars between a lowered unit working position and a raised non-working position;

    locking means pivotally mounted on said lower bars, said locking means having detents for locking the frame pin means in lowered working and raised non-working positions, said detents being notches elongated in the direction of said linkage and preventing disengagement of said locking means until said frame member is lifted therefrom before subsequent lowering to the working position; and

    downstop means for the frame in the working position, said down stop means comprising a pair of spaced rollers mounted on said frame, with each roller engaging a lower bar.

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