Abstract: A training device which is capable of following the lateral movements of an athlete, such as a basketball player, and blocking the player's shots while the player is trying to shoot or pass. The device includes a carriage with at least one wheel. A projection extends from the carriage and terminates in a blocking screen. The carriage is attached at one side to an extension pole which is attached to the backboard support pole. The other side of the carriage is attached to the player by a cord, preferably elastic. When the player moves, the carriage follows the player's lateral movements and blocks the player's attempts to shoot or pass the basketball.

Abstract: A wire guard for protecting the final drive shaft on a crawler tractor to prevent the accumulation of wire strands on the final drive shaft between the drive sprocket and the shaft housing or case. The guard comprises overlapping and interlocking sleeve segments on the shaft housing and on the drive sprocket, respectively.