Abstract: An auxiliary vehicle axle suspension which is pivoted to the frame for up and down movement. An air bellows unit is provided to force the axle down to a load-supporting position. Apparatus is provided to lift the axle to an elevated position when pressure is relieved in the air bellows unit, the apparatus being spring-operated.

Abstract: Linkage which extends between right and left brake pedals and a valve construction provided with an outwardly extending shiftable shaft and a pair of valves disposed to either side of the shaft. A bolt assembly passes through one end of the shaft and mounts a yoke for rocking movement, the yoke having ends equally offset from the valves. Right and left substantially identical linkages are employed, each linkage including a push rod mounted for limited adjustable sliding movement in a trunnion carried by a bifurcated arm of a bell crank. The other bell crank arm is connected to an end of the yoke by a ball joint assembly, one end of a tubular intermediate portion being adapted to bear against a valve.

Abstract: A brake assembly for engaging the periphery of a rotatable member, the brake assembly being energized by rotation of the rotatable member in either direction. The brake assembly includes a movable brake shoe which may be forced into contact with the periphery of the rotating member. The brake shoe has spaced apart rollers which are held in engagement with converging ramps on a wedge block. The brake shoe is permitted to shift laterally with respect to the ramps, and as the brake shoe engages the rotating member one of the rollers will move downwardly along one of the ramps to affect self-energization of the brake shoe. The wedge block is provided with a downwardly extending projection which is disposed between the converging ramps, the projection being received within a recess formed in the brake shoe, the recess being of greater width than the projection.