towable farm implement, attachment arrangement for securing row units to the tool bar of an agricultural implement and retaining bolt and nut assembly

摘要

Selective positioning of row units along a planter tool bar is facilitated by introducing an elongate channel of generally c-shaped cross-sectional configuration intermediate the tool bar and a plurality of unit platform holders of row. the channel is welded or otherwise fixed to the toolbar with the open edge of the? c? away from the toolbar and the platform brackets are secured to the channel by retaining bolt and nut assemblies. the screws extend through the retaining brackets and engage corresponding retaining nuts. the retaining nuts are positioned within the? c? and may be slid along the inner edge of the channel to any preferred position. the screws are then tightened securing the platform support to the selected location.