Abstract: Disclosed is a bucket that may be used to transport a material. In example embodiments, the bucket may include a barrel configured to hold a material, a gate assembly arranged at a bottom of the barrel, a first control system comprising an electrically controlled valve configured to control the gate assembly, and a second control system configured to control the electrically controlled valve. In example embodiments, the second control system may include a receiver configured to receive a signal from a remote signal generator to control the electrically controlled valve.

Abstract: A backup system is provided for a gate screw assembly of a race car transport trailer. The gate screw assembly includes a pair of screws which are rotated by an electric motor and interconnecting linkage arms so as to raise and lower the gate. The backup system includes rotatable shafts operatively connected to the drive shaft of the motor. Upon failure of the motor, the shafts of the backup system can be rotated by a drill or a wrench, thereby rotating the motor drive shaft, the linkage arms, and the gate screws, so that the gate can be moved between the raised and lowered positions.

Abstract: A tripod universal joint includes a shaft with a forked end or tulip which is held in assembled relationship with a tripod spider by a spring clip having angularly spaced legs adapted to snap releasably into grooves in the tulip. The spider is located in a cup-shaped housing. To facilitate assembly of the tulip with the spider, a resiliently flexible washer is placed on the bottom of the housing and holds the spring clip upwardly in a position permitting the legs of the clip to interlock with the tulip when the tulip is moved axially toward the clip. After assembly of the tulip with the clip has been completed, the spacer washer is removed from the housing by pulling on a flexible retrieval wire which is attached to the washer.

Abstract: A free-plunging constant velocity joint of the tripod type in which rollers are disposed in rolling engagement with the tracks of a tulip member and are rotatably and slidably supported by needles on the trunnions of a tripod. Each roller has an outer bearing surface and an inner bearing surface, the hardness of the outer bearing surface being less than the hardness of the inner bearing surface and less than the hardness of the tracks in order to reduce accelerated wear of the tracks as the roller rolls back and forth on the tracks.

Abstract: Studs are threaded into the end walls of the bearing cups of a universal joint cross and may be adjusted into contact with the outer ends of the trunnions to take up axial end play between the bearings cups and the trunnions while avoiding axial pressure between the cups and the trunnions.

Abstract: The cross includes four angularly spaced and outwardly projecting bearing assemblies each comprising a trunnion, an annular row of elongated rollers, and a bearing cup having a cavity which receives the rollers. The rollers of each bearing assembly are convexly crowned along their lengths so that forces transferred between the bearing cup and the trunnion are transmitted through each roller at a pressure area along the midportion thereof, the pressure area spreading or expanding as the forces increase. In a modified embodiment, the trunnion of each bearing assembly is convexly crowned.