Abstract: A towable wheeled undercarriage for carrying and supporting heavy loads and more particularly a carriage for supporting a crane of heavy duty or high capacity type. The carriage or carrier has a plurality of front and rear wheeled units independently mounted on a structural frame extending longitudinally of the vehicle and with at least the front wheels thereof being steerable. A gooseneck extends forwardly from the carrier and a coupling means on the forward end thereof connects to the fifth wheel of a tractor or towing vehicle. The coupling includes cushion means to support variable loads imposed by the fifth wheel on the gooseneck during towing and a linkage assembly is provided which is controlled by the fifth wheel to steer the front steerable wheels.

Abstract: A towed vehicle includes a frame, front and rear ground-engaged wheel assemblies mounted along said frame in such a manner that the center of gravity of said vehicle is situated between said front and rear wheel assemblies, and a gooseneck secured to said frame and projecting therefrom. A fluid pressure suspension cylinder is secured to the gooseneck adjacent the free outer end thereof and has a plunger reciprocally mounted therein and projecting downwardly therefrom. A plate with a king pin is secured to the plunger for coupling with the saddle of a fifth wheel on a towing vehicle. The plunger in the cylinder acts in conjunction with a compressible medium, to cushion loads between said gooseneck and towing vehicle. The fifth wheel by way of linkages from a collar rotatably mounted on the cylinder, steer steerable wheels on the towed vehicle.

Abstract: An outrigger assembly for mobile cranes wherein a roller and rail system is provided associated respectively with the outrigger mounting assembly and chassis of the vehicle to facilitate removal of the outrigger assembly from below the vehicle. The outrigger mounting assembly has rollers mounted on opposite sides thereof for the rolling along rails extending transversely across the vehicle at a position below the chassis thereof. Three roller units are mounted on the mounting assembly, two roller units being an upper set for rolling on the upper surface of the rails and the other being a lower unit for engaging the undersurface of the rails. The three sets of roller units are spaced apart from another longitudinally along the length of the mounting assembly, the lower roller unit being disposed adjacent one end of the outrigger mounting assembly.

Abstract: A steerable suspension assembly for a vehicle comprising a fluid pressure cylinder adapted to be secured to a rigid frame portion of a vehicle and having a plunger reciprocally mounted therein and projecting downwardly therefrom. The plunger and cylinder are arranged co-axially with the plunger freely rotatable in the cylinder about such axis. A jacket is mounted on the cylinder for rotation about the axis thereof and interconnected with the plunger causing the collar and plunger to rotate in unison while allowing reciprocal movement of the plunger.