Patent ID: 7392754

Claim:
A down pressure adjuster for a planter comprising: a mounting bracket; at least two horizontal arms attached to the mounting bracket to pivot about a first horizontal axis; a spring cartridge providing a core and including a first and second end caps, the end caps capturing therebetween, around the core, a helical compression spring; a first attachment point on one of the mounting bracket and at least one of the at least two horizontal arms pivotally receiving the first end cap to pivot about a second horizontal axis; and a plurality of second attachment points on an other of the mounting bracket and at least one of the at least two horizontal arms, each releasably and pivotally receiving the second end cap to pivot about a third horizontal axis; wherein each of the plurality of second attachment points provides a different downward load to the helical compression spring for a given angle of the at least one of the at least two horizontal arms.