Abstract: Adjustable vane rear chute for use with a dry material spreader including an inversely mounted rear chute with respect to a spinner disc, the rear chute including a plurality of adjustable vanes with respect to a central axis of the spinner disc. The adjustable vanes include a left vane and a right vane connected to a left handle and a right handle rod which are rotatably positioned about the base of the chute providing for predetermined spread of material. The rotational orientation function of the adjustable vane rear chute is a function of the conveyor drive shaft rpm, the cubic feet of material discharge per conveyor drive shaft revolution per inch of feedgate opening, and feedgate opening. The adjustable vane rear chute includes at least one adjustable vane and in this instance two adjustable vanes which are rotatably adjustable for each vane over a plurality of predetermined points, resulting in a correct pattern distribution of spread material.

Abstract: A mechanical cam-type apparatus is provided for ensuring even application of agricultural products or the like onto a field or the like from a moving vehicle notwithstanding variations from time to time in the ground speed of the vehicle. The apparatus includes a pair of opposed, yieldably biased-together cam members respectively coupled to the vehicle and spreading apparatus and separably rotatable in accordance with vehicle speed and the operational speed of the spreader; the cams are cooperatively configured and mounted for relative shifting movement caused by differences in the respective rotational speeds thereof, and means coupled between the cams and spreader motor is provided for variably operating the latter in response to the extent of cam shifting in order to automatically regulate spreader output in accordance with vehicle speed.