Abstract: A mobile cement mixer is provided with a programmed controller that automatically causes the mixing of concrete to follow a predefined mixing regime that is interruptable by an operator but will resume the mixing regime at the appropriate stage.

Abstract: A control system for a liftable auxiliary axle samples axle load measurements, and responds with adjustments based on an average value for axle load taken over a number of samples. Further features provide the system with verification and fail-safe procedures, as well as protection against operator subversion.

Abstract: A load distribution system for a road vehicle comprises a main wheels suspension which is preferably the steering wheels suspension and an auxiliary wheels suspension. The system includes air-inflatable balloons in the auxiliary suspension and an air compressor to feed the balloons. A weight sensor constantly measures the weight carried by the main suspension and sends corresponding signals to a computer. The system further comprises a control assembly for the auxiliary suspension constructed to receive pressure air from the compressor and feed it to the auxiliary suspension balloons. The control assembly is connected to the computer which is programmed to respond to the weight variations by correspondingly adjusting the pressure in the balloons of the auxiliary suspension in order to let the auxiliary suspension carry any extra weight which exceeds a preselected maximum weight to be carried by the main suspension.

Abstract: A shock-absorbing suspension for a road vehicle, having a body, comprises a leaf spring of which one end is connected to the vehicle body for pivotal movement of the spring about a first axis extending transversely of the body. The other end of the spring has a load and shock transmitting lever. The latter is mounted at one end for pivotal movement about a second axis parallel to the first one which its other end has a pneumatic balloon which is solid with it while being solid also with the vehicle frame. There is provided, on this lever and in cooperation with the other end of the leaf spring, a connection which is capable of transferring loads and shocks from the leaf spring to the lever.

Abstract: Load-hauling tandem combination formed of a motor driven truck releasably hitched to a wheel-mounted trailer which is self-propelled and self-steerable when unhitched from the truck. A lifting mechanism is provided on the trailer for mounting and removing a container or the like load box on and from its chassis.