Lock-up mechanism for a planter row unit
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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Abstract
A row unit with a mechanism which provides normal planting via a parallel bar linkage connection to the planter and which can be locked up in a raised, non-planting position when desired. The mechanism includes curved slotted openings in the lower bars of the linkage for frame mounted spacers as the frame pivots about the connection with the upper bars, and locking structure having detents to engage the spacers in the lowered working and raised non-working positions. The mechanism also prevents the release of the locking structure until the row unit weight is lifted therefrom.
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Citations
11 Claims
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1. A planter row unit comprising:
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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. - View Dependent Claims (2, 3)
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4. A planter row unit adapted for connection to a mobile frame comprising:
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a four bar linkage including an upper bar and a lower bar having forward ends adapted for pivotal attachment to said mobile frame, the rearward portion of said lower bar having an arcuate slot therein; a planter row unit frame carrying furrow forming means, furrow closing means, and seed delivery means, said row unit frame being pivotally connected to said upper bar and having pin means disposed thereon engaging said arcuate slot and moveable therein from the forward end of said slot toward the rearward end upon said row unit frame being raised from a working position to a non-working position; and means for securing said row unit frame in both the working position and the non-working position. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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Specification