Abstract: A pair of A-frames and a pair of torque tubes are used in a body support structure of an off highway vehicle to carry all of the load of the vehicle. The vehicle load in the rear is carried directly on the torque tubes and the front load is cantilevered from the torque tubes.

Abstract: Several embodiments of a wheel assembly for use with large, off-highway vehicles, comprising a drive motor mounted on the wheel hub, and brake calipers cooperating with an annular brake disc supported by a disc carrier which is "outboard" or disposed radially outwardly of the brake calipers, for providing greater heat dissipation and greater braking forces upon the application of braking pressure. In one embodiment, the brake disc is secured to the carrier at its outer periphery by a plurality of circumferentially spaced bolts. In two other embodiments, the brake disc is mounted for limited relative movement with respect to the carrier to accommodate radial and circumferential thermal expansion and contraction in aggravated situations. In one of these other embodiments, the brake disc is retained against excessive circumferential movement relative to the carrier by a plurality of individual lugs affixed to the carrier.

Abstract: An off-highway dump vehicle of the bottom-dump, two axle type having a single wheel in all positions; an A-frame front suspension which provides large steering angles for the vehicle wheels; an A-frame rear suspension system separate from the front suspension system; a dual braking system comprising primary and secondary brakes actuated by a common brake pedal and arranged wherein the secondary brakes are automatically actuated upon failure of the primary brakes for any reason; the vehicle structural elements being pinned together for facilitating assembly and disassembly thereof for shipment of the vehicle to the site of operation thereof; the vehicle load in the rear is carried directly on torque tubes and the front load is cantilevered from the torque tubes; the vehicle deck is a "floating" type structure in that the only elements carried by the deck are the fluid lines for the braking system, steering system, and the like; the access door to the axle box is of a self-closing construction in that air press

Abstract: A dual steering system for vehicles, particularly for large and heavy off-highway vehicles, wherein a back-up steering system is provided for safety purposes. Dual hydraulic systems are provided and coordinated whereby in the event the primary steering system fails for any reason, the back-up steering system automatically assumes the entire steering operation, thus providing a safety feature for the vehicle.

Abstract: A self-propelled floor jack for intermittently lifting substantially great loads and comprising base element means supported by propelling wheel means, lift means selectively engagable with the load, positive-lock pawl and ratchet means cooperating with the lift means for locking thereof in preselected elevated positions, bell crank and lever means operably connected with the lift means for determining the travel path therefor, and steering and control means operable for propelling and actuating the apparatus.