Patent ID: 6606956
Filing Date: 2003-08-19
Classification: A01B,A01C

Abstract:
An apparatus for use with a planter assembly constructed to move in a transport direction where the planter assembly includes support wheels mounted to the underside of a carrier frame, the apparatus comprising:a bar pivotally mounted to the underside of the carrier frame for pivotal movement between a transport position and a functional position; a hydraulic cylinder linked between the bar and the carrier frame for driving the bar between the transport and functional positions, the carrier frame, cylinder and bar forming a linkage path where each of the cylinder, bar and carrier frame is a linkage component; and an overload locking member linked between first and second linkage components to maintain the spatial relationship there between and such that a draft force applied to the bar in a direction opposite the transport direction causes a secondary force on the locking member, wherein, the locking member fails when the secondary force exceeds a threshold force.