Patent ID: 8474546
Filing Date: 2013-07-02
Classification: A01C

Abstract:
1. An agricultural implement comprising: a toolbar adapted to be coupled to a prime mover; and a plurality of ground opener units mounted to the toolbar, wherein each of the ground opener units comprises a frame adapted to be mounted to the tool bar, an axle carried by the frame, a disc rotatably mounted to the axle and adapted to cut a furrow into a planting surface, a set of pressure setting engagement members formed on a portion of the frame, a packer wheel coupled to the frame by a packer wheel arm, a packer pressure adjustment assembly mounted to the frame and adapted to exert a pressure on the packer wheel arm, wherein an amount of pressure exerted on the packer wheel arm by the packer pressure adjustment assembly is set based on which of the pressure setting engagement members the packer pressure adjustment assembly is engaged, wherein the packer pressure adjustment assembly includes a packer pressure adjustment arm coupled to the axle and adapted to be selectively engaged with the set of pressure setting engagement members at a user selected one of a plurality of packing pressure positions, and a linear spring interconnected between the packer pressure adjustment arm and the packer wheel arm, and configured to exert a force on the packer wheel arm dependent upon the user selected packing pressure a position of the packer pressure adjustment arm.