Patent ID: 7540333
Filing Date: 2009-06-02
Classification: A01B,A01C

Abstract:
1. A down pressure assembly for incorporation into an agricultural implement to be pulled by a tractor, the down pressure assembly comprising: an attachment frame comprising of a first mounting bracket for attachment to a trailing planter sub-bar and having four straight members extending laterally rearward from said trailing planter sub-bar and are spaced apart to four corners on said mounting bracket to define a rectilinear space in between, said attachment frame for attachment between a front portion of the agricultural implement and at least two wheels of a row unit for traveling along the ground, the row unit also having a tool disposed between the two wheels for engaging the ground; a second mounting bracket is mounted on said first mounting bracket and has two flanges extending rearward, a shaft is carried by the flanges and is rotatable in journals formed by the flanges, a cam with an integrally formed retaining cam post is fixed near one end of the shaft to rotate with the shaft, the cam post bears on one end of a torsion element, the opposing end of the torsion element is retained by a web attached to a down pressure bar and a radial arm, an adjustment mechanism for varying the torsion of the torsion element mounted on the opposite end of shaft; and said down pressure bar receiving a force from the torsion element to apply a downward force to the attachment frame.